CN104660120A - Motor zero-position detection method and device - Google Patents
Motor zero-position detection method and device Download PDFInfo
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- CN104660120A CN104660120A CN201510066291.9A CN201510066291A CN104660120A CN 104660120 A CN104660120 A CN 104660120A CN 201510066291 A CN201510066291 A CN 201510066291A CN 104660120 A CN104660120 A CN 104660120A
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
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Abstract
The embodiment of the invention provides a motor zero-position detection method and device and relates to the technical field of automobiles. By the adoption of the motor zero-position detection method and device, the complexity of a motor can be effectively reduced and controlled, and the detection precision of a zero position of a rotor of the motor can be improved. The motor zero-position detection method comprises the following steps: transmitting a back electromotive force signal to an oscilloscope by the motor, wherein the back electromotive force signal is used for representing an induced electromotive force signal produced by rotation of the rotor of the motor; transmitting a Z pulse signal to the oscilloscope by a controller of the motor, wherein the Z pulse signal is used for representing a zero-point position signal during rotation of the rotor of a rotary transformer of the motor; obtaining the time length of the back electromotive force signal and the time length from a zero point of the back electromotive force signal to the Z pulse signal from the oscilloscope by a processor; obtaining the zero position of the rotor of the motor by the processor according to the difference between the time length of the back electromotive force signal and the time length from the zero point of the back electromotive force signal to the Z pulse signal. The motor zero-position detection method and device are used for zero-position detection of the motor.
Description
Technical field
The present invention relates to automobile technical field, particularly relate to a kind of motor zero testing method and device.
Background technology
Along with the raising of people's living standard, pure electric automobile is more and more subject to liking of people because of its advantage such as no pollution, zero discharge, and along with the development of science and technology, and pure electric automobile is also development is rapidly in recent years.The power unit of pure electric automobile comprises battery, electric machine controller and motor etc., and this motor can comprise rotor, stator and resolver.Such as, permagnetic synchronous motor (Permanent Magnet Synchronous Motor, PMSM) comprises resolver, and has the advantages such as the high and power density of system effectiveness is large, is widely used in pure electric automobile.When electric machine controller accurately controls motor, need the position being obtained the rotor of motor by the position of the rotor of resolver, due to the mounting process of motor, there is deviation between the dead-center position of the dead-center position of the rotor of usual resolver and the rotor of motor, described deviation is the zero-bit of the rotor of motor.Therefore, before machine operation, need the zero-bit of the rotor detecting motor.
In prior art, directly can adopt DC location method, namely the direct current passing into suitable size in motor stator three-phase windings is given, wherein A phase winding is input, B, C phase winding exports, and makes motor rest on A phase winding position, i.e. the dead-center position of motor by means of rotor permanent magnet magnetic pole, then according to the rotor with the resolver of the rotor coaxial of motor, the position reading the rotor of resolver is exactly the zero-bit of the rotor of motor; The locate mode of current closed-loop can also be adopted to detect the zero-bit of the rotor of motor.
But, the zero-bit method detecting the rotor of motor in prior art needs to control motor by inverter, external high pressure power supply and specific software program, and the armature spindle of motor exists friction, therefore, the complexity controlling motor is higher, and the precision detecting the zero-bit of the rotor of motor is lower.
Summary of the invention
Embodiments of the invention provide a kind of motor zero testing method and device, effectively can reduce the complexity controlling motor, improve the precision of the zero-bit of the rotor detecting motor.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The first aspect of the embodiment of the present invention, provides a kind of motor zero testing method, comprising:
Motor transmits back-emf signal to oscilloscope, and described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced;
Electric machine controller transmits Z pulse signal to described oscilloscope, the signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, and described motor comprises the rotor of resolver;
Processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope;
Described processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.
In conjunction with first aspect, can in implementation at the first, described motor comprises to oscilloscope transmission back-emf signal:
Dynamometer machine drives described motor to rotate and produces back electromotive force, and described motor transmits described back-emf signal by oscilloscope described in two-phase alignment any in triple line.
Can implementation in conjunction with the first, can in implementation at the second, at described electric machine controller to before described oscilloscope transmission Z pulse signal, described method also comprises:
Described electric machine controller is to the resolver transmission excitation signal of described motor;
The resolver of described motor produces feedback signal according to described excitation signal;
The resolver of described motor transmits described feedback signal by holding wire to described electric machine controller, and described feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
Can implementation in conjunction with the second, can in implementation at the third, described electric machine controller comprises to described oscilloscope transmission Z pulse signal:
Described electric machine controller produces described Z pulse signal according to resolver decoding circuit to described feedback signal decoding, and described electric machine controller comprises described resolver decoding circuit;
Described electric machine controller transmits described Z pulse signal by the NM pin of described resolver decoding circuit to described oscilloscope.
In conjunction with first aspect, first to the third can in implementation any one, can in implementation at the 4th kind, the zero-bit that described processor obtains the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal comprises:
Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor.
Second aspect, provides a kind of motor zero detector, comprising:
Motor, for transmitting back-emf signal to oscilloscope, described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced;
Electric machine controller, for transmitting Z pulse signal to described oscilloscope, the signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, described motor comprises the rotor of resolver;
Processor, for obtaining the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope;
Described processor is also for the duration according to described back-emf signal and the poor zero-bit that obtain the rotor of described motor of the zero point from described back-emf signal to the duration of described Z pulse signal.
In conjunction with second aspect, can in implementation at the first, described motor specifically for:
Dynamometer machine drives described motor to rotate and produces back electromotive force, and described motor transmits described back-emf signal by oscilloscope described in two-phase alignment any in triple line.
Can implementation in conjunction with the first, can in implementation at the second,
Described electric machine controller also for: to described motor resolver transmission excitation signal;
The resolver of described motor is used for: produce feedback signal according to described excitation signal;
The resolver of described motor also for: transmit described feedback signal by holding wire to described electric machine controller, described feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
Can implementation in conjunction with the second, can in implementation at the third,
Described electric machine controller also for: produce described Z pulse signal according to resolver decoding circuit to the decoding of described feedback signal, described electric machine controller comprises described resolver decoding circuit;
Described electric machine controller specifically for: transmit described Z pulse signal by the NM pin of described resolver decoding circuit to described oscilloscope.
In conjunction with second aspect, first to the third can in implementation any one, can in implementation at the 4th kind, described processor specifically for:
Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor.
The motor zero testing method that the embodiment of the present invention provides and device.First, motor transmits back-emf signal to oscilloscope, this back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced, then, electric machine controller is to described oscilloscope transmission Z pulse signal, the signal of dead-center position when this Z pulse signal is for representing that the rotor of the resolver of described motor rotates, processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope; This processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.Relative to prior art, under the prerequisite not increasing additional circuit and software program, utilize motor, electric machine controller and oscilloscope by the zero-bit of the rotor of the concept detection motor of the zero-bit of the rotor of motor, thus effectively can reduce the complexity controlling motor, improve the precision of the zero-bit of the rotor detecting motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 provides a kind of motor zero testing method flow diagram for the embodiment of the present invention;
Fig. 2 provides another kind of motor zero testing method flow diagram for the embodiment of the present invention;
Fig. 3 provides a kind of back-emf signal and Z pulse signal waveform schematic diagram for the embodiment of the present invention;
Fig. 4 provides a kind of motor zero detector structural representation for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention provides a kind of motor zero testing method, as shown in Figure 1, comprising:
Step 101, motor transmit back-emf signal to oscilloscope.
Described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced.
Step 102, electric machine controller are to described oscilloscope transmission Z pulse signal.
The signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, described motor comprises the rotor of resolver.
Step 103, processor obtain the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope.
Step 104, described processor obtain the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.
So, first, motor transmits back-emf signal to oscilloscope, this back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced, then, electric machine controller is to described oscilloscope transmission Z pulse signal, the signal of dead-center position when this Z pulse signal is for representing that the rotor of the resolver of described motor rotates, processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope; This processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.Relative to prior art, under the prerequisite not increasing additional circuit and software program, utilize motor, electric machine controller and oscilloscope by the zero-bit of the rotor of the concept detection motor of the zero-bit of the rotor of motor, thus effectively can reduce the complexity controlling motor, improve the precision of the zero-bit of the rotor detecting motor.
Embodiment 2
The embodiment of the present invention provides a kind of motor zero testing method, and as shown in Figure 2, described method comprises:
Step 201, dynamometer machine drive motor rotate and produce back electromotive force.
AC power is powered to dynamometer machine by the frequency conversion of frequency converter, and dynamometer machine rotarily drives motor and rotates, and motor at the uniform velocity rotates generation back electromotive force.This AC power can be the three phase mains of 380 volts (V).
Step 202, motor are by two-phase alignment oscilloscope transmission back-emf signal any in triple line.
Due to motor not energising, just dynamometer machine rotarily drives motor rotation and produces induced electromotive force, so be transferred on electric machine controller in order to avoid back-emf signal (relevant with the rating of electric machine), cause the damage of electric machine controller device, the triple line of motor, without the need to being connected with the triple line of electric machine controller, just transmits back-emf signal to oscilloscope.Described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced, and namely the signal of described induced electromotive force is line voltage signal.Such as, when triple line comprises A phase line, B phase line and C phase line, motor can transmit the line voltage signal of this motor by A phase line and B phase line to oscilloscope, or transmit the line voltage signal of this motor by A phase line and C phase line to oscilloscope, or transmit the line voltage signal of this motor by B phase line and C phase line to oscilloscope.It should be noted that, in order to ensure safety and prevent the triple line short circuit of motor, need to be wound around in three phase lines with electro-insulating rubber band there is no use and exposed phase line, such as, when motor transmits the line voltage signal of this motor by A phase line and B phase line to oscilloscope, be wound around C phase line with electro-insulating rubber band.
Step 203, electric machine controller are to the resolver transmission excitation signal of motor.
The resolver of step 204, motor produces feedback signal according to described excitation signal.
This feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
The resolver of step 205, motor transmits described feedback signal by holding wire to electric machine controller.
Step 206, electric machine controller produce Z pulse signal according to resolver decoding circuit to described feedback signal decoding.
DC power supply is powered to electric machine controller, and this DC power supply can be the low-tension supply of 12 volts (V).The signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates.
Step 207, electric machine controller transmit described Z pulse signal by the NM pin of resolver decoding circuit to oscilloscope.
Revolving the NM (North Marker) become in decoding circuit and represent the dead-center position of the rotor of resolver, feedback signal once just produces a Z pulse signal through dead-center position.
Step 208, processor obtain the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from oscilloscope.
Step 209, processor obtain the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.
Example, as shown in Figure 3, suppose that motor is permagnetic synchronous motor, produce the back-emf signal a shown in Fig. 3, Z pulse signal b.Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor.
Concrete, resolver is made up of stators and rotators, when installing resolver, is installed together respectively by the stators and rotators of resolver with the stators and rotators of motor.When motor rotates, the rotor of resolver and the rotor synchronous rotary of motor.The dead-center position of the rotor of resolver can be obtained by resolver decoding circuit, and the dead-center position of the rotor of motor obtains by the back-emf signal of motor.The Z pulse produced in resolver decoding circuit is the dead-center position of the rotor of resolver, and the sine-shaped starting point of the back-emf signal of motor is the dead-center position of the rotor of motor.
When motor does not apply outside three-phase voltage, the smoothly rotating shaft of rotary permanent-magnet synchronous machine evenly, just can generate sinusoidal induced electromotive force in the stator side of permagnetic synchronous motor, its frequency and amplitude are directly proportional to the rotor speed of rotation.Stator winding due to permagnetic synchronous motor is star-like connection, its neutral point is at motor internal, directly cannot pass through oscilloscope measurement permagnetic synchronous motor phase voltage, indirectly obtain phase voltage, because the angle of line voltage leading phase voltage is by test permagnetic synchronous motor line voltage
therefore deduct
angle.
It should be noted that, smoothly can also rotate the rotating shaft of the motor of other types evenly, generate square wave induced electromotive force etc. in the stator side of the motor of described other types.
Motor zero testing method of the present invention and device, first, motor transmits back-emf signal to oscilloscope, this back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced, then, electric machine controller is to described oscilloscope transmission Z pulse signal, the signal of dead-center position when this Z pulse signal is for representing that the rotor of the resolver of described motor rotates, processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope; This processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.Relative to prior art, under the prerequisite not increasing additional circuit and software program, utilize motor, electric machine controller and oscilloscope by the zero-bit of the rotor of the concept detection motor of the zero-bit of the rotor of motor, thus effectively can reduce the complexity controlling motor, improve the precision of the zero-bit of the rotor detecting motor.
Embodiment 3
The embodiment of the present invention provides a kind of motor zero detector, as shown in Figure 4, comprising:
DC power supply 41, electric machine controller 42, motor 43, dynamometer machine 44, frequency converter 45, AC power 46 and oscilloscope 47, electric machine controller 42 comprises resolver decoding circuit 421, and motor 43 comprises resolver 431.
Wherein, DC power supply 41 connects electric machine controller 42 by the positive negative wire of DC power supply, electric machine controller 42 is connected with motor 43 and oscilloscope 47 respectively, motor 43 is connected with electric machine controller 42 and oscilloscope 47 respectively, dynamometer machine 44 is arranged in dynamo dynamometer machine stand (not shown), motor 43 is connected and fixed on dynamo dynamometer machine stand by bearing and dynamometer machine 44, and dynamometer machine 44 connects frequency converter 45, and frequency converter 45 connects AC power 46.
Motor, for transmitting back-emf signal to oscilloscope, described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced.This motor drives described motor to rotate specifically for: dynamometer machine and produces back electromotive force, and described motor transmits described back-emf signal by oscilloscope described in two-phase alignment any in triple line.
Electric machine controller is used for: to the resolver transmission excitation signal of described motor.
The resolver of motor is used for: produce feedback signal according to described excitation signal; Transmit described feedback signal by holding wire to described electric machine controller, described feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
Electric machine controller also for: produce described Z pulse signal according to resolver decoding circuit to the decoding of described feedback signal, described electric machine controller comprises described resolver decoding circuit; Described Z pulse signal is transmitted to described oscilloscope by the NM pin of described resolver decoding circuit, the signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, described motor comprises the rotor of resolver.
Processor, for obtaining the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope.
Described processor is also for the duration according to described back-emf signal and the poor zero-bit that obtain the rotor of described motor of the zero point from described back-emf signal to the duration of described Z pulse signal.
Described processor specifically for:
Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor, the signal of described induced electromotive force is line voltage signal.
It should be noted that, frequency converter is used for the voltage of AC power being transferred to dynamometer machine after frequency conversion, for dynamometer machine is powered.In the motor zero detector that the embodiment of the present invention provides, the specific descriptions of part functional module can corresponding content in reference method embodiment, and the present embodiment is no longer described in detail here.
Motor zero testing method of the present invention and device, first, motor transmits back-emf signal to oscilloscope, this back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced, then, electric machine controller is to described oscilloscope transmission Z pulse signal, the signal of dead-center position when this Z pulse signal is for representing that the rotor of the resolver of described motor rotates, processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope; This processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.Relative to prior art, under the prerequisite not increasing additional circuit and software program, utilize motor, electric machine controller and oscilloscope by the zero-bit of the rotor of the concept detection motor of the zero-bit of the rotor of motor, thus effectively can reduce the complexity controlling motor, improve the precision of the zero-bit of the rotor detecting motor.
Through the above description of the embodiments, those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, the internal structure by device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described module or unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (10)
1. a motor zero testing method, is characterized in that, comprising:
Motor transmits back-emf signal to oscilloscope, and described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced;
Electric machine controller transmits Z pulse signal to described oscilloscope, the signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, and described motor comprises the rotor of resolver;
Processor obtains the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope;
Described processor obtains the zero-bit of the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal.
2. motor zero testing method according to claim 1, is characterized in that, described motor comprises to oscilloscope transmission back-emf signal:
Dynamometer machine drives described motor to rotate and produces back electromotive force, and described motor transmits described back-emf signal by oscilloscope described in two-phase alignment any in triple line.
3. motor zero testing method according to claim 2, is characterized in that, before described electric machine controller transmits Z pulse signal to described oscilloscope, described method also comprises:
Described electric machine controller is to the resolver transmission excitation signal of described motor;
The resolver of described motor produces feedback signal according to described excitation signal;
The resolver of described motor transmits described feedback signal by holding wire to described electric machine controller, and described feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
4. motor zero testing method according to claim 3, is characterized in that, described electric machine controller comprises to described oscilloscope transmission Z pulse signal:
Described electric machine controller produces described Z pulse signal according to resolver decoding circuit to described feedback signal decoding, and described electric machine controller comprises described resolver decoding circuit;
Described electric machine controller transmits described Z pulse signal by the NM pin of described resolver decoding circuit to described oscilloscope.
5. the motor zero testing method according to claim 1-4 any one claim, it is characterized in that, the zero-bit that described processor obtains the rotor of described motor according to the duration of described back-emf signal and the difference of the duration from the zero point of described back-emf signal to described Z pulse signal comprises:
Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor, the signal of described induced electromotive force is line voltage signal.
6. a motor zero detector, is characterized in that, comprising:
Motor, for transmitting back-emf signal to oscilloscope, described back-emf signal is for representing that the rotor of described motor rotates the signal of the induced electromotive force produced;
Electric machine controller, for transmitting Z pulse signal to described oscilloscope, the signal of dead-center position when described Z pulse signal is for representing that the rotor of the resolver of described motor rotates, described motor comprises the rotor of resolver;
Processor, for obtaining the duration of described back-emf signal and the duration from the zero point of described back-emf signal to described Z pulse signal from described oscilloscope;
Described processor is also for the duration according to described back-emf signal and the poor zero-bit that obtain the rotor of described motor of the zero point from described back-emf signal to the duration of described Z pulse signal.
7. motor zero detector according to claim 6, is characterized in that, described motor specifically for:
Dynamometer machine drives described motor to rotate and produces back electromotive force, and described motor transmits described back-emf signal by oscilloscope described in two-phase alignment any in triple line.
8. motor zero detector according to claim 7, is characterized in that,
Described electric machine controller also for: to described motor resolver transmission excitation signal;
The resolver of described motor is used for: produce feedback signal according to described excitation signal;
The resolver of described motor also for: transmit described feedback signal by holding wire to described electric machine controller, described feedback signal comprises sinusoidal feedback signal and cosine feedback signal.
9. motor zero detector according to claim 8, is characterized in that,
Described electric machine controller also for: produce described Z pulse signal according to resolver decoding circuit to the decoding of described feedback signal, described electric machine controller comprises described resolver decoding circuit;
Described electric machine controller specifically for: transmit described Z pulse signal by the NM pin of described resolver decoding circuit to described oscilloscope.
10. the motor zero detector according to claim 6-9 any one claim, is characterized in that, described processor specifically for:
Duration according to described back-emf signal and the zero point from described back-emf signal, to the duration of described Z pulse signal, obtain the zero-bit of the rotor of described motor by the first formula,
Described first formula is:
Wherein, described θ represents the zero-bit of the rotor of motor, and described t represents the described duration from the zero point of described back-emf signal to described Z pulse signal, and described T represents the duration of described back-emf signal, and described 2 π represent the physical angle of sinusoidal cycles, described in
represent the delay of the phase voltage signal of the rotor of described motor relative to the line voltage signal of the rotor of described motor, the signal of described induced electromotive force is line voltage signal.
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