CN108712130A - Single resistor current sampling transposition control method, device, equipment and storage medium - Google Patents
Single resistor current sampling transposition control method, device, equipment and storage medium Download PDFInfo
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- CN108712130A CN108712130A CN201810633307.3A CN201810633307A CN108712130A CN 108712130 A CN108712130 A CN 108712130A CN 201810633307 A CN201810633307 A CN 201810633307A CN 108712130 A CN108712130 A CN 108712130A
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- 238000005070 sampling Methods 0.000 title claims abstract description 93
- 230000017105 transposition Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000003860 storage Methods 0.000 title claims abstract description 11
- 239000013598 vector Substances 0.000 claims abstract description 262
- 230000010363 phase shift Effects 0.000 claims abstract description 115
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- 210000001367 artery Anatomy 0.000 claims description 16
- 210000003462 vein Anatomy 0.000 claims description 16
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- 238000003079 width control Methods 0.000 claims 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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Abstract
The present invention discloses a kind of single resistor current sampling transposition control method, device, equipment and storage medium, the current phasor pulsewidth that single resistor current sampling transposition control method passes through the two-phase in one sampling period of inverter bridge in acquisition target inverter circuit, it is used as target vector pulsewidth after summing to the first phase current vector pulse-width and the second phase current vector pulse-width, target vector pulsewidth is compared respectively from different default vector pulse-width sections；Phase shift is carried out to predetermined pulse control signal according to comparison result.Technical solution of the present invention carries out subregion to the region of current sample, different regions is fallen into according to target vector pulsewidth, to carrying out phase shift to predetermined pulse control signal according to comparison result so that realize the region-wide current sample of single resistance.
Description
Technical field
The present invention relates to converter technique field, more particularly to single resistor current sampling transposition control method, device, equipment and
Storage medium.
Background technology
The control system for permanent-magnet synchronous motor used in convertible frequency air-conditioner outdoor compressor makes since temperature is high, humidity is big etc.
The system of obtaining can not install above-mentioned measurement device, these affect the popularization and application of PMSM Drive System.Therefore it needs
A kind of more simple and effective electric current detecting method is found, and relative to Hall current sensor, it is mutually electric using single resistance sampling
It flows reconstructing method and carries out current detecting, circuit structure is extremely simple, at low cost, small, is very suitable for cost requirement
Higher application scenario.
Single resistance sampling method for reconstructing phase current refers to one current sampling resistor of series connection on DC bus, by right
The analysis of bus current instantaneous value and on off state, obtains biphase current, and third phase current is obtained by the method for reconstruct.
Existing patented technology (publication No. CN201310477423.8) discloses a kind of single resistance sampling time compensating method.
This method does not account for the special area of certain current sample failures, can not achieve region-wide current sample.
Invention content
The main object of the present invention is to provide a kind of single resistor current sampling transposition control method, it is intended to realize that single resistance is complete
The current sample in region.
To achieve the above object, single resistor current sampling transposition control method proposed by the present invention, this method include：
Obtain the biphase current vector pulse-width in one sampling period of inverter bridge in target inverter circuit, the biphase current vector
Pulsewidth is divided into the first phase current vector pulse-width and the second phase current vector pulse-width；
It sums to the first phase current vector pulse-width and the second phase current vector pulse-width, using summed result as mesh
Mark vector pulse-width；
The target vector pulsewidth is compared respectively from different default vector pulse-width sections, according to comparison result pair
Predetermined pulse controls signal and carries out phase shift, and wherein predetermined pulse control signal includes exporting to three tunnel pulse controls of the inverter bridge
At least one of signal processed.
Preferably, before the biphase current vector pulse-width for obtaining inverter bridge each sampling period, the method is also
Including：
It is determined according to the sampling dead time of the target inverter circuit, bus current stabilization time and sampling retention time
Minimum detection pulsewidth；
Each default vector pulse-width section is determined according to the minimum detection pulsewidth.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is more than minimum examine more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When surveying pulsewidth and the second phase current vector pulse-width and being more than minimum detection pulsewidth, phase shift is not carried out to predetermined pulse control signal.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is less than minimum examine more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When surveying pulsewidth and the second phase current vector pulse-width and being more than minimum detection pulsewidth, signal phase shift to the right is controlled to predetermined pulse, wherein
The pulsewidth of phase shift is minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio person placed in the middle in signal that predetermined pulse, which controls signal,.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is more than minimum examine more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When surveying pulsewidth and the second phase current vector pulse-width and being less than minimum detection pulsewidth, signal phase shift to the left is controlled to predetermined pulse, wherein
The pulsewidth of phase shift is minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio person placed in the middle in signal that predetermined pulse, which controls signal,.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection pulsewidth, first
When phase current vector pulse-width is more than minimum detection pulsewidth and the second phase current vector pulse-width and is more than minimum detection pulsewidth, not to default
Pulse control signal carries out phase shift.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection pulsewidth, first
When phase current vector pulse-width is less than minimum detection pulsewidth and the second phase current vector pulse-width and is more than minimum detection pulsewidth, to presetting arteries and veins
Punching control signal phase shift to the right, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is three-phase pulse control that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in signal processed.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection pulsewidth, first
When phase current vector pulse-width is more than minimum detection pulsewidth and the second phase current vector pulse-width and is less than minimum detection pulsewidth, to presetting arteries and veins
Punching control signal phase shift to the left, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is three-phase pulse control that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in signal processed.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, judges last time electricity
It is the first phase current vector pulse-width or the second phase current vector pulse-width that it is corresponding, which to flow detection-phase,；
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, and the first phase current vector pulse-width is more than
When minimum detection pulsewidth, phase shift is not carried out to predetermined pulse control signal；
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, and the first phase current vector pulse-width is less than
When minimum detection pulsewidth, signal phase shift to the right is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, presets arteries and veins
Punching control signal is that three-phase pulse controls duty ratio person placed in the middle in signal.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, judges last time electricity
It is the first phase current vector pulse-width or the second phase current vector pulse-width that it is corresponding, which to flow detection-phase,；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, and the second phase current vector pulse-width is more than
When minimum detection pulsewidth, phase shift is not carried out to predetermined pulse control signal；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, and the second phase current vector pulse-width is less than
When minimum detection pulsewidth, signal phase shift to the left is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, presets arteries and veins
Punching control signal is that three-phase pulse controls duty ratio person placed in the middle in signal.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
When the target vector pulsewidth is less than minimum detection pulsewidth and is more than the minimum detection pulsewidth of half, in judgement
Corresponding primary current detection-phase is the first phase current vector pulse-width or the second phase current vector pulse-width；
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, moves right to predetermined pulse control signal
Phase, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio residence in signal that predetermined pulse, which controls signal,
Middle person and the maximum；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, it is three-phase arteries and veins that predetermined pulse, which controls signal,
Duty ratio person placed in the middle and the maximum in punching control signal, the predetermined pulse placed in the middle to duty ratio control signal phase shift to the left, wherein
The pulsewidth of phase shift is minimum detection pulsewidth；Signal phase shift to the right is controlled to the predetermined pulse of largest duty cycle, the pulsewidth of phase shift is
Minimum detection pulsewidth.
Preferably, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
When the target vector pulsewidth is less than the minimum detection pulsewidth of half, predetermined pulse control signal is not carried out
Phase shift.
To achieve the above object, the present invention also proposes a kind of single resistor current sampling transposition control device, a kind of list
Resistor current sampling transposition control device：
Sampling module：Biphase current vector pulse-width for obtaining one sampling period of inverter bridge in target inverter circuit, institute
It states biphase current vector pulse-width and is divided into the first phase current vector pulse-width and the second phase current vector pulse-width；
Summation module will for summing to the first phase current vector pulse-width and the second phase current vector pulse-width
Summed result is as target vector pulsewidth；
Phase shift block, for the target vector pulsewidth to be compared respectively from different default vector pulse-width sections,
Phase shift is carried out to predetermined pulse control signal according to comparison result, wherein predetermined pulse control signal includes exporting to the inversion
At least one of tri- road pulse control signals of Qiao.
The present invention also proposes a kind of single resistor current sampling transposition control device, the list resistor current sampling transposition control
Equipment includes：Memory, processor and it is stored in the single resistor current that can be run on the memory and on the processor
Sampling transposition control program, the list resistor current sampling transposition control program are configured to single resistor current sampling as described above
The step of control method that transplants.
The present invention also proposes a kind of storage medium, and single resistor current sampling transposition control journey is stored on the storage medium
Sequence, single resistor current sampling transposition control as described above when the list resistor current sampling transposition control program is executed by processor
The step of method processed.
Technical solution of the present invention is sweared by obtaining the electric current of the two-phase in inverter bridge each sampling period in target inverter circuit
Pulsewidth is measured, the first phase current vector pulse-width and the second phase current vector pulse-width are summed to obtain target vector pulsewidth, by institute
Target vector pulsewidth is stated to be compared from the default vector pulse-width threshold value in different default vector pulse-width sections；According to comparison result pair
Predetermined pulse controls signal and carries out phase shift.Technical solution of the present invention carries out subregion, according to target vector to the region of current sample
Pulsewidth falls into different regions, to carrying out phase shift to predetermined pulse control signal according to comparison result so that realize that single resistance is complete
The current sample in region.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the system control block figure that single resistor current samples an embodiment；
Fig. 2 is the structural schematic diagram that single resistor current samples an embodiment；
Fig. 3 is the first pass figure of single resistor current sampling transposition one embodiment of control method of the present invention；
Fig. 4 is the second flow chart of single resistor current sampling transposition one embodiment of control method of the present invention；
Fig. 5 is the sequence diagram that the novel single resistance AD of the present invention samples an embodiment；
Fig. 6 is the sequence diagram that invention list resistor current samples one embodiment of phase shifting control；
Fig. 7 is the functional block diagram of invention list resistor current sampling transposition one embodiment of control device.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
The present invention proposes a kind of single resistor current sampling transposition control method.Referring to FIG. 1 and FIG. 2, this method is based on one kind
In existing motor inverter.The motor inverter is using cross-straight-intersection voltage frequency converter.The frequency converter includes rectification
Module, energy-storage module and inverter module, wherein inverter module include single resistance for sampling.It is real using series resistance on busbar
Now single resistance phase current sampling reconstructs motor three-phase current by the analysis to bus current instantaneous value and on off state；It will
Three-phase current obtains d shaft currents and q shaft currents, distribution and rotating speed after Clarke transform (Clark), Parker transform (park)
PI controls are being carried out after the electric current synthesis that PI is exported and maximum current torque ratio (MTPA) control exports, then are carrying out Clark-park
Inverse transformation, SVPWM, six road PWM outputs, form the control system of a rotating speed, current double closed-loop.
With reference to Fig. 3, in embodiments of the present invention, which includes：
S300：Obtain the biphase current vector pulse-width in one sampling period of inverter bridge in target inverter circuit, the two-phase electricity
Flow vector pulsewidth is divided into the first phase current vector pulse-width and the second phase current vector pulse-width.
In the present embodiment, the inverter bridge of frequency converter is made of using common three phase full bridge six switching devices
Three half-bridges.This six switching devices combine (signal of the half-bridge up and down of the same bridge arm is opposite) share 8 kinds of safety
On off state.Wherein 000,111 (being the on off state for indicating three upper bridge arms here) both on off states drive in motor
In not will produce effective electric current.Therefore it is called zero vector.Other 6 kinds of on off states are six effective vectors respectively.It
360 degree of voltage space is divided into 60 degree of sectors, totally six sectors utilize this six basic effectively vector sums two zero
Amount, can synthesize any vector in 360 degree.The current phasor pulsewidth of arbitrary two-phase in the step refers to six substantially effective
The pulsewidth of two current phasors in two zero amounts of vector sum.
S400：It sums to the first phase current vector pulse-width and the second phase current vector pulse-width, by summed result
As target vector pulsewidth.
Such as first phase current vector pulse-width be 6 microseconds, the second phase current vector pulse-width is 5 microseconds, then by summing
The target vector pulsewidth arrived is 11 microseconds.
S500：The target vector pulsewidth is compared respectively from different default vector pulse-width sections, according to comparing
As a result phase shift is carried out to predetermined pulse control signal, wherein predetermined pulse control signal includes exporting to three tunnels of the inverter bridge
At least one of pulse control signal.
The duty ratio of three road pulse control signals of usual inverter bridge differs, and can be divided into according to duty ratio size and be accounted between two parties
Sky is than pwm control signal, maximum duty cycle pwm control signal and minimum duty cycle pwm control signal.In the present embodiment, it will ask
Vector pulse-width with after is compared from the default vector pulse-width threshold value in different default vector pulse-width sections, will according to comparison result
Duty ratio pwm control signal placed in the middle carries out left and right translation or the pwm control signal of largest duty cycle is carried out left and right translation,
To reserve enough sampling times, to solve the problems, such as the current sample of non-observation area.Phase shift to the left in the present embodiment refers to
Phase shift is lagged in sequential, phase shift to the right refers to advanced phase shift in sequential.
In the present embodiment, phase shifting control processing is carried out to single resistance, carrying out sampling pulsewidth to the PWM wave of vector output asks
With, and carry out comparison of classification with default vector pulse-width threshold value, and according to the different condition pwm control signal placed in the middle to duty ratio and
The pwm control signal of largest duty cycle carries out left and right translation, realizes the compensation of phase.
Technical solution of the present invention is sweared by obtaining the electric current of the two-phase in inverter bridge each sampling period in target inverter circuit
Pulsewidth is measured, the first phase current vector pulse-width and the second phase current vector pulse-width are summed to obtain target vector pulsewidth, by institute
Target vector pulsewidth is stated to be compared from the default vector pulse-width threshold value in different default vector pulse-width sections；According to comparison result pair
Predetermined pulse controls signal and carries out phase shift.Technical solution of the present invention carries out subregion, according to target vector to the region of current sample
Pulsewidth falls into different regions, to carrying out phase shift to predetermined pulse control signal according to comparison result so that realize that single resistance is complete
The current sample in region.
With reference to Fig. 4, further, before the biphase current vector pulse-width for obtaining inverter bridge each sampling period,
The method further includes：
S100：When being kept according to the sampling dead time of the target inverter circuit, bus current stabilization time and sampling
Between determine minimum detection pulsewidth.
In the present embodiment, minimum detection pulsewidth is by sampling dead time, bus current stabilization time and sampling retention time
These three time parameters determine that specifically minimum detection pulsewidth is equal to sampling dead time, bus current stabilization time and sampling
The sum of these three time parameters of retention time.For example, minimum detection pulsewidth is Tn, sampling dead time is T1, bus current is steady
It is T3 to fix time as T2 and sampling retention time, then Tn=T1+T2+T3.After the model of frequency converter determines, when sampling dead zone
Between, bus current stabilization time and sampling retention time be all to determine.
S200：Each default vector pulse-width section is determined according to the minimum detection pulsewidth.It is worth noting that when minimum is examined
After surveying pulsewidth determination, multiple default vector pulse thresholds are obtained by preset rules.For example, it is Tmin to enable minimum detection pulsewidth,
Then by the minimum detection pulsewidth of three times, i.e. Tmin × 3 is used as a default vector pulse threshold.Default vector pulse threshold may be used also
To be Tmin × 2, Tmin, Tmin × 1/2 etc..
Vector pulse threshold is preset by these, forms multiple sections, to which target vector pulsewidth be classified.
In this implementation, target vector pulsewidth includes following classification, i.e. a1~a3, b1~b3, c1~c2, d1~d2 and e；It enables
First phase current vector pulse-width of sampling is Ta, and the first phase current vector pulse-width Ta corresponding pulse-width samples times are s1；Second
Phase current vector pulse-width is Tb, and it is s2 that the second phase current vector pulse-width, which is the Tb corresponding pulse-width samples times,.
Specifically the target vector pulsewidth is compared with multiple default vector pulse-width threshold values with reference to Fig. 5, Fig. 6；
Phase shift is carried out to predetermined pulse control signal according to comparison result, is specifically included：
(a1)：It is more than more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When minimum detection pulsewidth and the second phase current vector pulse-width are more than minimum detection pulsewidth, predetermined pulse control signal is not moved
Phase.
In this condition, motor can normally detect biphase current, need not carry out phase shift at this time.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(a2)：It is less than more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When minimum detection pulsewidth and the second phase current vector pulse-width are more than minimum detection pulsewidth, move right to predetermined pulse control signal
Phase, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio residence in signal that predetermined pulse, which controls signal,
Middle person.
The Ta corresponding s1 pulse-width samples times are too narrow at this time, and the corresponding s2 pulsewidths of Ta can be with normal sample, it is therefore desirable to right
S1 is widened, and carries out the pwm control signal of intermediate duty ratio to right translation, until the corresponding s1 of Ta are equal to minimum detection
Pulsewidth Tmin carries out sampling update before overflow again at this time.If but the corresponding s1 fiducial values of Ta are reaching close or equal to underflow
Then show that the corresponding s1 of Ta can not be sampled when place, corresponding Ta and Tb can not be sampled at this time, be handled at this time without phase shift.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；It is tied according to comparing
Fruit carries out phase shift to predetermined pulse control signal, specifically includes：
(a3)：It is more than more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When minimum detection pulsewidth and the second phase current vector pulse-width are less than minimum detection pulsewidth, signal is controlled to moving to left to predetermined pulse
Phase, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio residence in signal that predetermined pulse, which controls signal,
Middle person.
In Fig. 5, AD1 and two time points that AD2 is current sample.The Tb corresponding s2 pulse-width samples times are too narrow at this time,
The corresponding s1 pulsewidths of Ta can be with normal sample, it is therefore desirable to s2 is widened, to the pwm control signal of intermediate duty ratio into
Row carries out sampling update before underflow again at this time to left until the corresponding s2 pulsewidths of Tb are equal to minimum detection pulsewidth Tmin.
But shows that the corresponding s2 of Tb can not be sampled if the corresponding s2 fiducial values of Tb are when reaching close or equal at overflow, correspond at this time
Ta and Tb can not sample, in such cases Ta and Tb all without phase shift handle.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(b1)：It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection arteries and veins
When width, the first phase current vector pulse-width are more than minimum detection pulsewidth and the second phase current vector pulse-width and are more than minimum detection pulsewidth,
Phase shift is not carried out to predetermined pulse control signal.
In this condition, motor can normally detect biphase current, need not carry out phase shift at this time.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(b2)：It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection arteries and veins
When width, the first phase current vector pulse-width are less than minimum detection pulsewidth and the second phase current vector pulse-width and are more than minimum detection pulsewidth,
Signal phase shift to the right is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, and it is three that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in phase pulse control signal.
The Ta corresponding s1 pulse-width samples times are too narrow at this time, and the corresponding s2 pulsewidths of Tb can be with normal sample, it is therefore desirable to right
S1 is widened, and carries out the pwm control signal of intermediate duty ratio to right translation, until the corresponding s1 pulsewidths of Ta are equal to minimum
Pulsewidth Tmin is detected, sampling update is carried out before overflow again at this time, biphase current can be sampled in this way.If but the corresponding s1 of Ta
Fiducial value then shows that the corresponding s1 of Ta can not be sampled when reaching close or equal at underflow, and corresponding Ta and Tb can not at this time
Sampling is handled without phase shift at this time.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(b3)：It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection arteries and veins
When width, the first phase current vector pulse-width are more than minimum detection pulsewidth and the second phase current vector pulse-width and are less than minimum detection pulsewidth,
Signal phase shift to the left is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, and it is three that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in phase pulse control signal.
The Tb corresponding s2 pulse-width samples times are too narrow at this time, and the corresponding s1 pulsewidths of Ta can be with normal sample, it is therefore desirable to right
S2 is widened, and carries out the pwm control signal of intermediate duty ratio to left, until the corresponding s2 pulsewidths of Tb are equal to minimum
Pulsewidth Tmin is detected, sampling update is carried out before underflow again at this time, biphase current can be sampled in this way.If but the corresponding s2 of Tb
Fiducial value then shows that the corresponding s2 of Tb can not be sampled when reaching close or equal at overflow, and corresponding Ta and Tb can not at this time
Sampling, Ta and Tb is without phase shift processing in such cases.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(c1)：In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, judges
Corresponding current detecting stage last time is the first phase current vector pulse-width or the second phase current vector pulse-width；It is only capable of in such cases
Detect a wherein phase current, if such case continuously occurs, current detecting must be detected alternately at this time, be implemented as follows.
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, and the first phase current vector pulse-width is more than
When minimum detection pulsewidth, phase shift is not carried out to predetermined pulse control signal.Such situation need not move, and motor can detect to obtain
The corresponding phase currents of Ta, Tb can not then be sampled.
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, and the first phase current vector pulse-width is less than
When minimum detection pulsewidth, signal phase shift to the right is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, presets arteries and veins
Punching control signal is that three-phase pulse controls duty ratio person placed in the middle in signal.
The Ta corresponding s1 pulse-width samples times are too narrow at this time, it is therefore desirable to be widened to s1, to the PWM of intermediate duty ratio
Signal is controlled to be adopted before overflow again at this time until the corresponding s1 pulsewidths of Ta are equal to minimum detection pulsewidth Tmin to right translation
Sample updates, and can sample to obtain the corresponding s1 vector currents of Ta in this way.If but the corresponding s1 fiducial values of Ta are reaching close or are waiting
(undowflow) or the corresponding s2 fiducial values of Tb be when reaching close or equal to (overflow) at overflow at underflow, then table
The corresponding s1 of bright Ta can not be sampled.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(c2)：In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, judges
Corresponding current detecting stage last time is the first phase current vector pulse-width or the second phase current vector pulse-width；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, and the second phase current vector pulse-width is more than
When minimum detection pulsewidth, phase shift is not carried out to predetermined pulse control signal.Such situation does not need phase shift, and motor can detect to obtain
The corresponding phase currents of Tb, the corresponding phase currents of Ta can not then sample.
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, and the second phase current vector pulse-width is less than
When minimum detection pulsewidth, signal phase shift to the left is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, presets arteries and veins
Punching control signal is that three-phase pulse controls duty ratio person placed in the middle in signal.
The Tb corresponding s2 pulse-width samples times are too narrow at this time, it is therefore desirable to be widened to s2, to the PWM of intermediate duty ratio
Signal is controlled to be adopted before underflow again at this time until the corresponding s2 pulsewidths of Tb are equal to minimum detection pulsewidth Tmin to left
Sample updates, and can sample to obtain the corresponding s2 vector currents of Tb in this way.If but the corresponding s2 fiducial values of Tb are reaching close or are waiting
At overflow (overflow) or the corresponding s1 fiducial values of Ta then show when reaching close or equal to (underflow) at underflow
The corresponding s2 of Tb can not be sampled.
If the corresponding s2 vector currents of such situation Tb can not detect, can the corresponding s1 of detection Ta detect and in c1~c2
Between alternately cycle detection.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(d)：When the target vector pulsewidth is less than minimum detection pulsewidth and is more than the minimum detection pulsewidth of half, sentence
Corresponding disconnected current detecting stage last time is the first phase current vector pulse-width or the second phase current vector pulse-width.Such situation will be examined
The phase shift to the right of the pwm control signal of the largest duty cycle person measured, and current flow detection is executed (i.e. by this phase of phase shift
Current detecting comes out).If such situation continuously occurs, current detecting must alternate cycles detection at this time.If (Ta is corresponded to when mobile
S1 fiducial values reaching close or equal at underflow (undowflow) or the corresponding s2 fiducial values of Tb are close or equal to reaching
Then show that the pulsewidth of maximum phase is too narrow at overflow when (overflow), current of electric can not detect, at this time Ta corresponding s1 and Tb
Corresponding s2 vector currents can not detect, can not phase shift).It is implemented as follows：
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, moves right to predetermined pulse control signal
Phase, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio residence in signal that predetermined pulse, which controls signal,
Middle person and the maximum；The Ta corresponding s1 pulse-width samples times are too narrow at this time, it is therefore desirable to be widened to s1, to intermediate and maximum
The pwm control signal of duty ratio carry out to right translation, until the corresponding s1 pulsewidths of Ta are equal to minimum detection pulsewidth Tmin, at this time
Sampling update is carried out before overflow again, can sample to obtain the corresponding s1 vector currents of Ta in this way.If but the corresponding s1 of Ta compare
Value is reaching close or equal at underflow (undowflow) or the corresponding s2 fiducial values of Tb are reaching close or equal at overflow
(overflow) then show that the corresponding s1 of Ta can not be sampled when.If the corresponding s1 vector currents of such situation Ta can not detect,
Detect the corresponding s2 of Tb alternately cycle detections between d1~d2.
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, it is three-phase arteries and veins that predetermined pulse, which controls signal,
Duty ratio person placed in the middle and the maximum in punching control signal, the predetermined pulse placed in the middle to duty ratio control signal phase shift to the left, wherein
The pulsewidth of phase shift is minimum detection pulsewidth；Signal phase shift to the right is controlled to the predetermined pulse of largest duty cycle, the pulsewidth of phase shift is
Minimum detection pulsewidth.
The Tb corresponding s2 pulse-width samples times are too narrow at this time, it is therefore desirable to be widened to s2, to the PWM of maximum duty cycle
It controls signal and carries out phase shift to the right, and the pwm control signal of intermediate duty ratio is carried out to left until the corresponding s2 arteries and veins of Tb
Width is equal to minimum detection pulsewidth Tmin, carries out sampling update before underflow again at this time, can sample to obtain the corresponding s2 of Tb in this way
Vector current.If but the corresponding s2 fiducial values of Tb are reaching close or equal to underflow when intermediate duty ratio is moved to the left
(overflow) at or the corresponding s1 fiducial values of Ta then show that Tb is corresponded to when reaching close or equal to (underflow) at overflow
S2 can not sample.If the corresponding s2 vector currents of such situation Tb can not detect, judge that can the corresponding s1 of Ta detect, and
The alternately cycle detection between d1~d2.
Specifically, the target vector pulsewidth is compared with multiple default vector pulse-width threshold values；According to comparison result
Phase shift is carried out to predetermined pulse control signal, is specifically included：
(e)：When the target vector pulsewidth is less than the minimum detection pulsewidth of half, signal is not controlled to predetermined pulse
Carry out phase shift.If the corresponding s2 vector currents of the corresponding s1 and Tb of such situation Ta can not detect, it is not necessarily to phase shift.
With reference to Fig. 7, to achieve the above object, the present invention also proposes a kind of single resistor current sampling transposition control device, institute
State a kind of single resistor current sampling transposition control device：
Sampling module 10：The biphase current vector pulse-width for obtaining inverter bridge each sampling period obtains the first phase current arrow
Measure pulsewidth and the second phase current vector pulse-width；
Summation module 20：First phase current vector pulse-width and the second phase current vector pulse-width are summed to obtain target arrow
Measure pulsewidth；
Phase shift block 30：By the default vector pulse-width threshold value of the target vector pulsewidth and different default vector pulse-width sections
It is compared；Phase shift is carried out to predetermined pulse control signal according to comparison result, wherein predetermined pulse control signal includes three-phase
At least one of pulse control signal.
The present invention also proposes a kind of single resistor current sampling transposition control device, the list resistor current sampling transposition control
Equipment includes：Memory, processor and it is stored in the single resistor current that can be run on the memory and on the processor
Sampling transposition control program, the list resistor current sampling transposition control program are configured to single resistor current sampling as described above
The step of control method that transplants.
The present invention also proposes a kind of storage medium, and single resistor current sampling transposition control journey is stored on the storage medium
Sequence, single resistor current sampling transposition control as described above when the list resistor current sampling transposition control program is executed by processor
The step of method processed.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.Word first, second, with
And the use of third etc. does not indicate that any sequence, can these words be construed to title.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal equipment (can be mobile phone, computer, clothes
Be engaged in device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (10)
1. a kind of list resistor current sampling transposition control method, which is characterized in that this method includes
Obtain the biphase current vector pulse-width in one sampling period of inverter bridge in target inverter circuit, the biphase current vector pulse-width
It is divided into the first phase current vector pulse-width and the second phase current vector pulse-width；
It sums to the first phase current vector pulse-width and the second phase current vector pulse-width, is sweared summed result as target
Measure pulsewidth；
The target vector pulsewidth is compared respectively from different default vector pulse-width sections, according to comparison result to default
Pulse control signal carries out phase shift, and wherein predetermined pulse control signal includes exporting to three road Pulse Width Control letters of the inverter bridge
Number at least one.
2. list resistor current sampling transposition control method as described in claim 1, which is characterized in that in the acquisition inverter bridge
Before the biphase current vector pulse-width in each sampling period, the method further includes：
It is determined according to the sampling dead time of the target inverter circuit, bus current stabilization time and sampling retention time minimum
Detect pulsewidth；
Each default vector pulse-width section is determined according to the minimum detection pulsewidth.
3. list resistor current sampling transposition control method as claimed in claim 2, which is characterized in that by the target vector arteries and veins
It is wide to be compared with multiple default vector pulse-width threshold values；Phase shift is carried out to predetermined pulse control signal according to comparison result, specifically
Including：
It is more than minimum detection arteries and veins more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When wide and the second phase current vector pulse-width is less than minimum detection pulsewidth, signal phase shift to the left, wherein phase shift are controlled to predetermined pulse
Pulsewidth be minimum detection pulsewidth, predetermined pulse control signal be three-phase pulse control signal in duty ratio person placed in the middle；
It is less than minimum detection arteries and veins more than the minimum detection pulsewidth of three times, the first phase current vector pulse-width in the target vector pulsewidth
When wide and the second phase current vector pulse-width is more than minimum detection pulsewidth, signal phase shift to the right, wherein phase shift are controlled to predetermined pulse
Pulsewidth be minimum detection pulsewidth, predetermined pulse control signal be three-phase pulse control signal in duty ratio person placed in the middle.
4. list resistor current sampling transposition control method as claimed in claim 2, which is characterized in that by the target vector arteries and veins
It is wide to be compared with multiple default vector pulse-width threshold values；Phase shift is carried out to predetermined pulse control signal according to comparison result, specifically
Including：
It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection pulsewidth, the first phase electricity
When flow vector pulsewidth is more than minimum detection pulsewidth and the second phase current vector pulse-width and is less than minimum detection pulsewidth, to predetermined pulse control
Signal processed phase shift to the left, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is three-phase pulse control letter that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in number；
It is less than the minimum detection pulsewidth of three times in the target vector pulsewidth and is more than two times of minimum detection pulsewidth, the first phase electricity
When flow vector pulsewidth is less than minimum detection pulsewidth and the second phase current vector pulse-width and is more than minimum detection pulsewidth, to predetermined pulse control
Signal processed phase shift to the right, the wherein pulsewidth of phase shift are minimum detection pulsewidth, and it is three-phase pulse control letter that predetermined pulse, which controls signal,
Duty ratio person placed in the middle in number.
5. single resistor current sampling transposition control method as described in any one of Claims 1-4, which is characterized in that will
The target vector pulsewidth is compared with multiple default vector pulse-width threshold values；Signal is controlled to predetermined pulse according to comparison result
Phase shift is carried out, is specifically included：
In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, primary current inspection in judgement
The corresponding survey stage is the first phase current vector pulse-width or the second phase current vector pulse-width；
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, and the first phase current vector pulse-width is less than minimum
When detecting pulsewidth, signal phase shift to the right is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, predetermined pulse control
Signal processed is that three-phase pulse controls duty ratio person placed in the middle in signal.
6. single resistor current sampling transposition control method as described in any one of Claims 1-4, which is characterized in that will
The target vector pulsewidth is compared with multiple default vector pulse-width threshold values；Signal is controlled to predetermined pulse according to comparison result
Phase shift is carried out, is specifically included：
In minimum detection pulsewidth of the target vector pulsewidth less than two times and it is more than minimum detection pulsewidth, primary current inspection in judgement
The corresponding survey stage is the first phase current vector pulse-width or the second phase current vector pulse-width；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, and the second phase current vector pulse-width is less than minimum
When detecting pulsewidth, signal phase shift to the left is controlled to predetermined pulse, the wherein pulsewidth of phase shift is minimum detection pulsewidth, predetermined pulse control
Signal processed is that three-phase pulse controls duty ratio person placed in the middle in signal.
7. single resistor current sampling transposition control method as described in any one of Claims 1-4, which is characterized in that will
The target vector pulsewidth is compared with multiple default vector pulse-width threshold values；Signal is controlled to predetermined pulse according to comparison result
Phase shift is carried out, is specifically included：
When the target vector pulsewidth is less than minimum detection pulsewidth and is more than the minimum detection pulsewidth of half, last time electricity is judged
It is the first phase current vector pulse-width or the second phase current vector pulse-width that it is corresponding, which to flow detection-phase,；
It is the second phase current vector pulse-width when current detecting stage last time is corresponding, signal phase shift to the right is controlled to predetermined pulse,
Wherein the pulsewidth of phase shift is minimum detection pulsewidth, and it is that three-phase pulse controls duty ratio person placed in the middle in signal that predetermined pulse, which controls signal,
And the maximum；
It is the first phase current vector pulse-width when current detecting stage last time is corresponding, it is three-phase pulse control that predetermined pulse, which controls signal,
Duty ratio person placed in the middle and the maximum in signal processed, the predetermined pulse placed in the middle to duty ratio control signal phase shift to the left, wherein phase shift
Pulsewidth be minimum detection pulsewidth；Signal phase shift to the right is controlled to the predetermined pulse of largest duty cycle, the pulsewidth of phase shift is minimum
Detect pulsewidth.
8. a kind of list resistor current sampling transposition control device, which is characterized in that a kind of single resistor current sampling transposition control
Device processed：
Sampling module, the biphase current vector pulse-width for obtaining one sampling period of inverter bridge in target inverter circuit, described two
Phase current vector pulse-width is divided into the first phase current vector pulse-width and the second phase current vector pulse-width；
Summation module will sum for summing to the first phase current vector pulse-width and the second phase current vector pulse-width
As a result it is used as target vector pulsewidth；
Phase shift block, for the target vector pulsewidth to be compared respectively from different default vector pulse-width sections, according to
Comparison result carries out phase shift to predetermined pulse control signal, and wherein predetermined pulse control signal includes exporting to the inverter bridge
At least one of three road pulse control signals.
9. a kind of list resistor current sampling transposition control device, which is characterized in that the list resistor current sampling transposition control is set
It is standby to include：It memory, processor and is stored in the single resistor current that can be run on the memory and on the processor and adopts
Sample transposition control program, the list resistor current sampling transposition control program are configured to as described in any one of claim 1 to 7
Single resistor current sampling transposition control method the step of.
10. a kind of storage medium, which is characterized in that be stored with single resistor current sampling transposition control journey on the storage medium
Sequence, the list when list resistor current sampling transposition control program is executed by processor as described in any one of claim 1 to 7
The step of resistor current sampling transposition control method.
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