CN102299681A - Motor system, power converting device and control method of power converting device - Google Patents

Abstract

The invention provides a motor system, a power converting device and the control method of the power converting device. The output voltage of the motor system and the power converting device driven by a motor is detected via a detection component. Then the direct-current voltage value or variation value is estimated according to the ratio of the detected output voltage value and the output voltage instruction value. If the direct-current voltage value or variation value is more than a specified value, the overvoltage is inhibited by correcting the speed instruction value. Therefore, the regeneration energy flows from an AC motor into an inverter during the regeneration running process so as to charge a smooth capacitor. When the direct current voltage valve is too high, the variation of the DC voltage can be estimated without arranging a capacitor DC voltage detection circuit so as to inhibition the overvoltage.

Description

The control method of electric motor system, power-converting device and power-converting device

Technical field

The present invention relates to the control method of electric motor system, power-converting device and power-converting device, particularly relate to the control method of electric motor system, power-converting device and the power-converting device of the direct voltage change that is suitable for suppressing in the inverter.

Background technology

In the motor driven of having utilized power-converting device, the AC power that will be supplied with by source power supply is carried out rectification by the diode of power-converting device inside, is undertaken smoothly being transformed into direct voltage thus by smmothing capacitor.Also the direct voltage after the conversion is transformed into arbitrarily alternating voltage by inverter and exports to motor, thus motor is carried out variable-ratio control.

This direct voltage is subjected to the influence of the operational situation of the situation of source power supply and inverter, when source power supply change etc., problems such as torque deficiency that the output of generation inverter relates to and overcurrent abnormality, so for example in Japanese kokai publication hei 6-311787 communique, disclose following technology, promptly, be provided for detecting the voltage detector of direct voltage, control output frequency in the mode that becomes specified V/F ratio.

Patent documentation 1: Japanese kokai publication hei 6-311787 communique

On the other hand, under the situation of motor deceleration running, the mechanical energy that motor is accumulated is regenerated in inverter.When this regeneration operating, if regeneration operating continues, then can flow into excessive regenerated energy to inverter from motor, smmothing capacitor is recharged, and causes direct voltage excessive, and inverter circuit is exerted an influence.

In the described prior art of above-mentioned Japanese kokai publication hei 6-311787 communique, directly detect direct voltage.Therefore, in the extension of above-mentioned prior art if will suppress excessive direct voltage, testing circuit need be set and be provided with after maintenance.And because the increase of component count makes device complicated, the reliability decrease of device.Particularly, in the power-converting device of multiple type, the number of testing circuit increases, and installs further complicated.

In above-mentioned prior art, do not recognize when regeneration operating to flow into regenerated energy to inverter from motor, do not recognize because of smmothing capacitor is recharged the excessive direct voltage that causes yet and brought influence to inverter circuit.

Summary of the invention

The objective of the invention is to, a kind of control method of saving the detection part of direct voltage, can suppress superpotential power conversion system, power-converting device and the power-converting device of direct voltage when regeneration operating is provided.In addition, also can suppress because of flowing into the influence that regenerated energy brings to inverter to inverter from motor.

In order to reach above-mentioned purpose, adopt following formation in the present invention: computing is used to suppress the command value of power converter, detect the output voltage of power converter, utilize detected output voltage values and output voltage command value to infer the value or the change value of direct voltage, suppress the rising of direct voltage according to presumed value when the decelerate.

Perhaps, adopt following formation: computing is used to indicate the speed command of the speed of power converter, instruction based on the output voltage of speed command computing power converter output is the output voltage command value, detect direct voltage, perhaps infer direct voltage or change value, when decelerate and in detected value or presumed value, become when bigger, according to the mode erection rate command value of the rising that suppresses direct voltage than setting.

As constituting more specifically, adopt following formation: according to detected output voltage values and output voltage command value recently infer dc voltage value or change value, if dc voltage value or change value more than setting, erection rate command value then.

(invention effect)

According to the present invention, can obtain following effect: for example when motor driven, at direct voltage sharply and under the situation of change significantly, also can be low-cost and suppress smmothing capacitor overvoltage of direct current in the inverter accurately.

Description of drawings

Fig. 1 is the pie graph of the power-converting device of embodiment 1.

Fig. 2 is the figure of formation of the controller of explanation embodiment 1.

Fig. 3 is the flow chart of the related speed command correction of explanation embodiment 1.

Fig. 4 is the skeleton diagram of the action of the related speed command correction of embodiment 1.

Fig. 5 is the analog simulation waveform of expression effect of the present invention.

Fig. 6 is the skeleton diagram of the action of the related speed command correction of embodiment 2.

Fig. 7 is the skeleton diagram of the action of the related speed command correction of embodiment 3.

Fig. 8 is the figure of formation of the controller of explanation embodiment 4.

Fig. 9 is the pie graph of formation of the action of explanation embodiment 5.

Figure 10 is the pie graph of the power-converting device of embodiment 6.

Figure 11 is the flow chart of the related speed command correction of explanation embodiment 7.

Symbol description:

101: three-phase alternating-current supply;

102: rectifier diode;

103: smmothing capacitor;

104: inverter (inverter part);

105: alternating current motor;

106: output current detector;

107: output voltage detector;

108: the coordinate transform of output current detected value;

109: the coordinate transform of output voltage detected value;

110: the excitation current instruction generating unit;

111: output voltage command value arithmetic unit;

112: the strobe pulse generating unit;

113: output voltage command value correcting part;

114: parts are inferred in the direct voltage change;

115: the speed command correcting part;

116: the speed command generating unit;

117: the coordinate transform of output voltage instruction correction value;

118:d axle divider;

119:q axle divider;

120: output voltage instruction correction value size arithmetic unit;

121: output voltage detected value size arithmetic unit;

122: operational part is inferred in the direct voltage change;

123: based on the speed command correction value arithmetic unit of inferring the result of dc voltage value or change value;

123A: based on the concrete calculation method of the speed command correction value arithmetic unit of inferring the result of dc voltage value or change value;

124A: speed command correction combiner;

124B: speed command correction ratio change combiner;

125: based on the speed command correction value arithmetic unit of torque current value;

125A: based on the concrete calculation method of the speed command correction arithmetic unit of torque current value;

126: multiple coiling transformer;

127U～129W:U phase～W phasing commutator;

130U～132U:U phase inverter unit;

133V～134V:V phase inverter unit;

135W～136W:W phase inverter unit;

137: controller;

200: the speed value correcting process begins;

201: rate of deceleration running usually;

202: operational part is inferred in the direct voltage change;

203: the overvoltage of direct current judging part;

204: speed command correction value efferent;

205: speed command correction value operational part;

206: speed command correction value adder calculator;

207: calculate portion computing time;

208: the decelerate detection unit;

I _q ^FB: the torque current detected value;

V _d ^FB: d axle output voltage detected value;

V _q ^FB: q axle output voltage detected value;

ω _r ^*: speed value;

ω _R1 ^*: speed value (revising the back);

I _d ^*: the excitation current instruction value;

r ₁: a resistance;

r ₂: secondary resistance;

L ₁: a self-induction;

L ₂: the secondary self-induction;

L _σ: leakage inductance once converts;

M: magnetizing inductance;

T ₂: the secondary time constant;

Φ _2d: d axle magnetic flux;

V _d ^*: d axle output voltage command value;

V _q ^*: q axle output voltage command value;

V _d ^*: d axle output voltage command value (revising the back);

V _q ^*: q axle output voltage command value (revising the back);

V ^*: output voltage command value (revising the back) size;

V ^FB: output voltage detected value size;

α: the result is inferred in dc voltage value or change;

V _U ^*: U phase output voltage command value (revising the back);

V _V ^*: V phase output voltage command value (revising the back);

V _W ^*: W phase output voltage command value (revising the back);

Δ ω _r ^*: the speed command correction value;

ω _r ^* _Goal: target arrival rate command value;

ω _R1: the mechanical angle frequency;

Δ ω _r ^* _Vdc, Δ ω _r ^* _IqFB: the speed command correction value;

Δ ω _R2 ^*: with Δ ω _r ^* _VdcWith Δ ω _r ^* _IqFBSpeed command correction value after the addition;

ω _R2 ^*: by the revised speed value of speed command correction combiner 124A in the embodiment 4;

ω _r ^*(t): the speed value of moment t;

Δ t: sampling time;

Δ ω _R3 ^*: the variable quantity of the speed value during the Δ t.

Embodiment

Below, utilize accompanying drawing, illustrate to be used to implement mode of the present invention.

(embodiment 1)

Fig. 1 illustrates the 1st embodiment of the present invention.In Fig. 1, will carry out rectification by rectifier diode (diode portions) 102 by the alternating voltage of three-phase alternating-current supply 101 supplies, carry out smoothing by smmothing capacitor 103, and obtained direct voltage.Below, for example also can replace rectifier diode and use transducer that has utilized IGBT etc.By inverter (inverter part) 104 this dc voltage conversion is become the interchange of optional frequency, phase place, supply with, this alternating current motor is carried out variable-ratio control to alternating current motor 105.In output current detector 106, detect the U phase in the described alternating current motor 105, the output current that V reaches the W phase mutually, calculate torque current detected value I by output current detected value coordinate transform 108 _q ^FBIn output voltage detector 107, detect the U phase in the described alternating current motor 105, the output voltage that V reaches the W phase mutually, calculate d axle output voltage detected value V by output voltage detected value coordinate transform 109 _d ^FBAnd q axle output voltage detected value V _q ^FB

Fig. 2 is that the figure of the formation of parts 114, speed command correcting part 115 is inferred in the output voltage command value arithmetic unit 111, strobe pulse generating unit 112, output voltage command value correcting part 113, the direct voltage change that specifically illustrate in Fig. 1.It all is functional record that parts 114 and speed command correcting part 115 are inferred in these output voltage command value arithmetic units 111, strobe pulse generating unit 112, output voltage command value correcting part 113, direct voltage change, can constitute integral body by 1 or a plurality of computer, realize each function by software, can also realize each function by the control logic of special use.At speed command correction value ω based on speed command generating unit 116 _r ^*, calculate by speed command correcting part 115 usefulness speed command correction value Δ ω _r ^*To speed value ω _r ^*Carry out revised speed value (revising the back) ω _R1 ^*(ω _R1 ^*=ω _r ^*+ Δ ω _r ^*), output voltage command value arithmetic unit 111 is based on this speed value that calculates (revising the back) ω _R1 ^*, torque current detected value I _q ^FB, excitation current instruction generating unit 110 excitation current instruction value I _d ^*, an and resistance r of alternating current motor 105 ₁, secondary resistance r ₂, a self-induction L ₁, secondary self-induction L ₂, the leakage inductance L that converts once _σ, magnetizing inductance M, secondary time constant T ₂And d axle magnetic flux instruction Φ _2d ^*, d axle output voltage command value V is calculated and exported to (1) formula that illustrates below the utilization and (2) formula _d ^*And q axle output voltage command value V _q ^*In addition, about the once conversion leakage inductance L in (1) formula and (2) formula _σ, described secondary time constant T ₂, described d axle magnetic flux instruction Φ _2d ^*, utilize (3) formula, (4) formula and (5) formula to calculate and export.

[mathematical expression 1]

V _d ^*＝r ₁·I _d ^*-ω _r1 ^*·L _σ·I _q ^* …(1)

[mathematical expression 2]

${V_q}^{*}=r_1\&CenterDot;{I_q}^{*}+{{\mathrm{\&omega;}}_{r1}}^{*}\&CenterDot;L_{\mathrm{\&sigma;}}\&CenterDot;{I_d}^{*}+\frac{\mathrm{<figure-callout\; id="2"\; label="M\; L"\; filenames="HSA00000526941200051.png,HSA00000526941200091.png"\; state="\{\{state\}\}">M</figure-callout>}}{L_{}}\&CenterDot;{{\mathrm{\&omega;}}_{r1}}^{*}\&CenterDot;{{\mathrm{\&Phi;}}_{2d}}^{*}...\left(2\right)$

[mathematical expression 3]

${\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="HSA00000526941200051.png,HSA00000526941200091.png"\; state="\{\{state\}\}">T</figure-callout>}}_2=\frac{L_2}{{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HSA00000526941200051.png,HSA00000526941200091.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}...\left(3\right)$

[mathematical expression 4]

$L_{\mathrm{\&sigma;}}=L_1-M\&CenterDot;\left(\frac{M}{L_2}\right)...\left(4\right)$

[mathematical expression 5]

Φ _2d ^*＝M·I _d ^* …(5)

In output voltage command value correcting part 113, according to d axle output voltage command value V _d ^*And q axle output voltage command value V _q ^*, and with d axle output voltage detected value V _d ^FBAnd q axle output voltage detected value V _q ^FBInfer the α as a result that infers of dc voltage value in the parts 114 or change as the direct voltage change of input, at d axle output voltage command value V _d ^*And q axle output voltage command value V _q ^*, in d axle divider 118 and q axle divider 119, calculate d axle output voltage command value (revising the back) V according to following (6) formula that illustrates and (7) formula _d ^*And q axle output voltage command value (revising the back) V _q ^*

[mathematical expression 6]

${V_d}^{**}=\frac{{V_d}^{*}}{\mathrm{\&alpha;}}...\left(6\right)$

[mathematical expression 7]

${V_q}^{**}=\frac{{V_q}^{*}}{\mathrm{\&alpha;}}...\left(7\right)$

Infer in the parts 114 in the direct voltage change, utilize in output voltage instruction correction value size arithmetic unit 120 according to d axle output voltage command value (revising the back) V _d ^*And q axle output voltage command value (revising the back) V _q ^*And the big or small V of the output voltage values of calculating by following (8) formula that illustrates (revising the back) ^*, in output voltage detected value size arithmetic unit 121 according to d axle output voltage detected value V _d ^FBAnd q axle output voltage detected value V _q ^FBAnd the big or small V that calculates by following (9) formula that illustrates ^FB, infer the α as a result that infers that calculates dc voltage value or change in the operational part 122 by following (10) formula that illustrates in the direct voltage change, infer dc voltage value or change value.

[mathematical expression 8]

$V^{**}=\sqrt{{\left({V_d}^{**}\right)}^2+{\left({V_q}^{**}\right)}^2}...\left(8\right)$

[mathematical expression 9]

$V^{\mathrm{FB}}=\sqrt{{\left({V_d}^{\mathrm{FB}}\right)}^2+{\left({V_q}^{\mathrm{FB}}\right)}^2}...\left(9\right)$

[mathematical expression 10]

$\mathrm{\&alpha;}=\frac{V^{**}}{V^{\mathrm{FB}}}...\left(10\right)$

Then, in described output voltage command value correcting part 113, by output voltage instruction correction value coordinate transform 117, with d axle output voltage command value (revising the back) V _d ^*And q axle output voltage command value (revising the back) V _q ^*Be transformed into U phase output voltage command value (revising the back) V _U ^*, V phase output voltage command value (revise back) V _V ^*And W phase output voltage command value (revising the back) V _W ^*In addition, in described strobe pulse generating unit 112, for example by comparing U phase output voltage command value (revising the back) V _U ^*, V phase output voltage command value (revise back) V _V ^*And W phase output voltage command value (revising the back) V _W ^*And carrier waveform, produce by the strobe pulse after the PWM modulation, come the connection of the switch element of control inverter (inverter part) 104 to disconnect.

In speed command correcting part 115, by speed command correction value arithmetic unit 123 output speeds instruction correction value Δ ω _r ^*, implement the speed value correction.Utilize the flow chart of Fig. 3, the concrete processing of speed command correcting part 115 is described.In the flow chart of Fig. 3,, in step 200, begin to handle, in step 201, set the speed value ω of t constantly then as in the step shown in each action _r ^*(t), turn round with the common rate of deceleration.For example, set among Fig. 4 from being equivalent to t ₁The ω that the place sets _r ^*To being equivalent to t ₃The ω that the place sets _r ^*The linear deceleration.Then, in step 202, calculate the dc voltage value or the change value α that are inferred.Then, in step 203, judge the dc voltage value or change value α and the boundary value α that infer out ₁Size.This α ₁It is the value that is equivalent to by the direct voltage maximum permissible value of the characteristic of smmothing capacitor decision.Surpass α at α ₁Situation under, in step 204, with speed command correction value Δ ω _r ^*As 0 output.On the other hand, α is lower than α in step S203 ₁Situation under, in step 205, calculate speed command correction value Δ ω _r ^*Here, speed command correction value Δ ω _r ^*Both can be the value of predetermined regulation, perhaps also can setting change value α for, big more correspondingly its value be big more therewith.Also can be worth α, select speed value (revising the back) ω according to change _R1 ^*For the switching of certain speed, accelerated service, deceleration or change in the speed any one.Then, in step 206, with speed value (revising the back) ω _r ^*With speed command correction value Δ ω _r ^*Addition resets revised speed value (revising the back) ω _R1 ^*(ω _R1 ^*=ω _r ^*+ Δ ω _r ^*).Then, in step 207, set and advanced the moment t+ Δ t second of sampling time Δ t after second.According to the sampling instant t+ Δ t second of setting in this step 207, flow process is returned step 201, is set in the speed value ω of moment t+ Δ t after second of the sampling time Δ t second of having advanced _r ^*(t).Thus, automatically be modified to the velocity mode that has suppressed described DC voltage rising.

Below, utilize the movement oscillogram of Fig. 4, the situation that is suppressed described dc voltage value by aforementioned flow chart is described.Implementing the t of speed value correction ₁～t ₂During this time, with speed value (revising the back) ω _R1 ^*Remaining certain speed (sets for: t ₁～t ₂Speed value ω during this time _r ^*Reduction and t ₁～t ₂Speed command correction value Δ ω during this time _r ^*Integration amount be identical value), but the mechanical angle frequencies omega of alternating current motor 105 _R1Can not change simultaneously with the change of speed value, even if at t ₁～t _aDuring this time, also become dc voltage value or the change value α≤boundary value α that infers out ₁Judgement, output speed instruction correction value Δ ω _r ^*, owing to proceed retarded motion, therefore flowing into regenerated energy to inverter (inverter part) 104 from alternating current motor 105, dc voltage value rises several percentage points.Then, at t _a～t ₂During this time, mechanical angle frequencies omega _R1Be accelerated service, dc voltage value descends.Then, at t ₂～t _bDuring this time, if dc voltage value is lower than boundary value α ₁Then speed value reduces speed now running (at t once more with the common rate of deceleration ₂～t _bDuring this time, setting speed instruction correction value Δ ω _r ^*=0), but the mechanical angle frequencies omega _R1Can not change simultaneously with the change of speed value, even if at t ₂～t _bAlso continue accelerated service during this time or with certain speed running, so dc voltage value descends several percentage points.Then, at t _b～t ₃During this time, mechanical angle frequencies omega _R1Become decelerate, dc voltage value rises.At t ₃After, same repeatedly action.

Shown in Fig. 5 in order to represent effect of the present invention the change of the dc voltage value during to regeneration operating carried out Thesimulation result.(Fig. 5 (i)) compares with the situation of not implementing the speed command correcting part, and the embodiment of the application of the invention (Fig. 5 (ii)) can remain on dc voltage value below the certain value.

By above formation, when described dc voltage value has surpassed setting, described speed value is revised, thereby under the situation of not utilizing testing circuit, also can be suppressed the rising of the direct voltage of smmothing capacitor 103 accurately.

(embodiment 2)

Below, to the 2nd embodiment of the present invention, the difference with the 1st embodiment is described.That is, other parts are identical with the 1st embodiment.In the 1st embodiment, surpassed under the situation of boundary value at dc voltage value of inferring out or change value, speed value is set at certain speed, suppressed the rising of dc voltage value, but shown in the movement oscillogram of Fig. 6, infer dc voltage value or the change value that parts 114 infer out in direct voltage change and surpassed under the situation of boundary value, also speed value temporarily can be set at the rising that accelerated service suppresses dc voltage value.In the present embodiment, compare, though reach target arrival rate command value ω with the 1st embodiment _r ^* _GoalNeed the time, but can obtain same effect about the inhibition of dc voltage value.

(embodiment 3)

Below, to the 3rd embodiment of the present invention, the difference with the 1st embodiment is described.In the 3rd embodiment, shown in the movement oscillogram of Fig. 7, infer dc voltage value or the change value that parts 114 infer out in direct voltage change and surpassed under the situation of boundary value, reduce than the little rising that suppresses dc voltage value of common value by the rate of deceleration with speed value.Speed value such as t ₁～t ₂, t ₃～t ₄Such during this time, in medium velocity when running rotation, with embodiment 1 and 2 similarly, DC voltage rising is several percentage points after just changing, and descends then.As t ₅～t ₆During institute's low speed rotation that is shown in running during this time, continue decelerate with the state that reduces the rate of deceleration, so DC voltage rising must be than boundary value height.In the present embodiment, compare with the 1st, the 2nd embodiment, dc voltage value becomes big several percentage points, but can reach target arrival rate command value ω the earliest _r ^* _Goal

(embodiment 4)

Below, to the 4th embodiment of the present invention, the difference with the 1st embodiment is described.The speed command correction combiner 124A that present embodiment can be replaced as by the speed command correcting part 115 with the 1st embodiment in Fig. 8 realizes.In the 1st embodiment, surpassed under the situation of boundary value at dc voltage value of inferring out or change value, calculate speed command correction value Δ ω by speed command correction value arithmetic unit 123 _r ^*, suppressed the rising of dc voltage value, but as shown in Figure 8, except calculate speed command correction value Δ ω by speed command correction value arithmetic unit 123 _r ^* _VdcOutside, at described torque current detected value I _q ^FBBe lower than under the situation of value of regulation, also calculate speed command correction value Δ ω by speed command correction value arithmetic unit 125 _r ^* _IqFB, utilize Δ ω by speed command correction combiner 124A _r ^* _VdcWith Δ ω _r ^* _IqFBSpeed command correction value Δ ω after the addition _R2 ^*, calculate speed command correction value ω _R2 ^*, can suppress dc voltage value more accurately thus.

(embodiment 5)

Below, to the 5th embodiment of the present invention, the difference with the 4th embodiment is described.Present embodiment, the speed command correction ratio change combiner 124B that can be altered to Fig. 9 by the speed command correction combiner 124A with the 4th embodiment realizes.In the 4th embodiment, except the dc voltage value or the change value of inferring out surpassed the situation of boundary value, also at torque current detected value I _q ^FBBe lower than under the situation of value of regulation, implement the speed value correction, suppressed the rising of dc voltage value thus, but as shown in Figure 9, in speed command correction ratio change combiner 124B, by on each speed command correction value, multiply by K ₁, K ₂(K ₁＞0, K ₂＞0) changes each value, suppress the rising of dc voltage value thus.By with K ₁, K ₂Be altered to value arbitrarily, can suppress the vibration of dc voltage value and torque current detected value, suppress the rising of dc voltage value.

(embodiment 6)

Below, to the 6th embodiment of the present invention, the difference with the 1st embodiment is described.Figure 10 is the example that the present invention shown in the 1st embodiment is applicable to the power-converting device of series multiplex mode.127U, 128V, 129W are respectively the converters of U phase, V phase, W phase.130U～132U is the part of the inverter unit in the U phasing commutator, is connected with a plurality of same inverter units.133V～134V is the inverter unit in the described V phasing commutator, and 135W～136W is the inverter unit in the described W phasing commutator, similarly is connected with a plurality of inverter units with connecting and composing of inverter unit 130U～132U in the U phasing commutator.At each inverter unit 130U～136W, from with each controller output of the same a plurality of controllers that constitute of controller 137 strobe signal after by the PWM modulation, the connection of switch element of controlling the single-phase inverter of each inverter unit disconnects.

In this formation, also similarly to Example 1, when regeneration operating,, revise described speed value, thereby can suppress the rising of the direct voltage of the smmothing capacitor in each described inverter unit according to described dc voltage value of inferring out or change value.Like this, in embodiment 1, the constituting of being exported by three-phase of 2 electrical level inverters shows effect of the present invention, but as present embodiment, even if series multiplex type power-converting device also can obtain effect similarly to Example 1.

In addition, so long as utilized the inverter of smmothing capacitor, can both obtain same effect.

(embodiment 7)

Below, to the 7th embodiment of the present invention, the difference with the 1st embodiment is described.Present embodiment as shown in figure 11, in step 208, at the Δ ω shown in (11) formula _R3 ^*Under the situation greater than running of 0 certain speed or accelerated service, in step 304 with described speed command correction value Δ ω _r ^*As 0 output.On the other hand, at Δ ω _R3 ^*Under the situation of decelerate, calculate dc voltage value or change presumed value α, surpass α at α less than 0 ₁Situation under, in step 204 with speed command correction value Δ ω _r ^*As 0 output.On the other hand, α is lower than α in step 203 ₁Situation under, in step 205, calculate speed command correction value Δ ω _r ^*Then, in step 206, to speed value ω _r ^*With speed command correction value Δ ω _r ^*Carry out add operation, reset revised speed value ω _R1 ^*Then, in step 207, set the speed value ω of moment t+ Δ t after second that has advanced sampling time Δ t second _r ^*(t).Thus, can access following effect: only when decelerate, implement speed command correction step, when accelerated service or certain speed when running, can prevent because system power supply voltage rises that the dc voltage value rising that causes is judged to be overvoltage and cause the effective situation of described speed command correction step.

[mathematical expression 11]

$\mathrm{\&Delta;}{{\mathrm{\&omega;}}_{\mathrm{<figure-callout\; id="3"\; label="r"\; filenames="HSA00000526941200041.png"\; state="\{\{state\}\}">r</figure-callout>}3}}^{*}=\frac{{{\mathrm{\&omega;}}_r}^{*}(t+\mathrm{\&Delta;t})+{{\mathrm{\&omega;}}_r}^{*}\left(t\right)}{\mathrm{\&Delta;t}}...\left(11\right)$

Claims (20)

1. an electric motor system is characterized in that, comprising:

Power converter, it will become direct voltage from the AC voltage conversion that source power supply is supplied with, and this dc voltage conversion is become frequency arbitrarily;

Motor, it is driven by described power converter;

Control device, it controls described power converter; With

Ordering calculation portion, it carries out computing to command value;

Described control device is controlled described power converter according to the mode that described power converter is moved according to described command value,

Described command value comprises that the instruction of the output voltage of described power converter output is the output voltage command value,

Described electric motor system is provided with the output voltage detection part that the output voltage to described power converter detects and utilizes this detected output voltage values and direct voltage that described output voltage command value is inferred the value or the change value of described direct voltage is inferred portion, and, according to this presumed value, when decelerate, revise in the described command value any one at least according to the mode of the rising that suppresses described direct voltage.

2. electric motor system according to claim 1 is characterized in that,

The described command value that is corrected is a speed value.

3. electric motor system according to claim 1 is characterized in that,

Dc voltage value or change value are inferred according to the described output voltage detected value and the ratio of described output voltage command value.

4. electric motor system according to claim 2 is characterized in that,

Under described dc voltage value of inferring out or change value become situation more than the setting, revise described speed value.

5. electric motor system according to claim 2 is characterized in that,

The correction of described speed value is when decelerate speed value temporarily to be remained certain speed, switch to accelerated service or change the wherein a kind of of the rate of deceleration.

6. electric motor system according to claim 2 is characterized in that,

According to detected current value when the motor driven, described speed value is carried out described correction.

7. electric motor system according to claim 2 is characterized in that,

Calculate the speed command correction value Δ ω that presumed value is utilized the output of type speed command correction value arithmetic unit _r ^* _VdcUtilize the speed command correction value Δ ω of type speed command correction value arithmetic unit output with electric current _r ^* _IqFBAddition and the correction value Δ ω that obtains _R2 ^*, be used as the speed correction value, utilize described Δ ω _R2 ^*Revise described speed value.

8. electric motor system according to claim 7 is characterized in that,

According to described dc voltage value of inferring out or change value, change described speed command correction value Δ ω respectively _r ^* _VdcWith described speed command correction value Δ ω _r ^* _IqFBValue.

9. a power-converting device is characterized in that, comprising:

Power converter, it will become direct voltage from the AC voltage conversion that source power supply is supplied with, and this dc voltage conversion is become frequency arbitrarily;

Control device, it controls described power converter; With

Ordering calculation portion, it carries out computing to command value;

Described control device is controlled described power converter according to the mode that described power converter is moved according to described command value,

Described command value comprises that the instruction of the output voltage of described power converter output is the output voltage command value,

Described power-converting device is provided with the output voltage detection part that the output voltage to described power converter detects and utilizes this detected output voltage values and direct voltage that described output voltage command value is inferred the value or the change value of described direct voltage is inferred portion, and, according to this presumed value, when decelerate, revise in the described command value any one at least according to the mode of the rising that suppresses described direct voltage.

10. power-converting device according to claim 9 is characterized in that,

The described command value that is corrected is a speed value.

11. power-converting device according to claim 9 is characterized in that,

Inferring according to the described output voltage detected value and the ratio of described output voltage command value of dc voltage value or change value inferred.

12. power-converting device according to claim 10 is characterized in that,

Under described dc voltage value of inferring out or change value become situation more than the setting, revise described speed value.

13. power-converting device according to claim 10 is characterized in that,

The correction of described speed value is when decelerate speed value temporarily to be remained certain speed, switch to accelerated service or change the wherein a kind of of the rate of deceleration.

14. power-converting device according to claim 10 is characterized in that,

According to detected current value when the motor driven, described speed value is carried out described correction.

15. power-converting device according to claim 10 is characterized in that,

Calculate the speed command correction value Δ ω that presumed value is utilized the output of type speed command correction value arithmetic unit _r ^* _VdcUtilize the speed command correction value Δ ω of type speed command correction value arithmetic unit output with electric current _r ^* _IqFBAddition and the speed command correction value Δ ω that obtains _R2 ^*, utilize described Δ ω _R2 ^*Revise described speed value.

16. power-converting device according to claim 15 is characterized in that,

According to described dc voltage value of inferring out or change value, change described speed command correction value Δ ω respectively _r ^* _VdcWith described speed command correction value Δ ω _r ^* _IqFBValue.

17. an electric motor system is characterized in that, comprising:

Power converter, it will become direct voltage from the AC voltage conversion that source power supply is supplied with, and this dc voltage conversion is become frequency arbitrarily;

Motor, it is driven by described power converter;

Control device, it controls described power converter;

The speed command operational part, it indicates the speed of described power converter; With

Output voltage ordering calculation portion, it is based on described speed command, and the instruction of the output voltage of the described power converter output of computing is the output voltage command value;

Described control device is controlled described power converter according to the mode that described power converter is moved according to described voltage instruction value,

Described electric motor system has the described direct voltage of detection or infers described direct voltage or the portion of inferring of change value, when decelerate and when described detected value or presumed value become greater than setting, according to the described speed value of mode correction of the rising that suppresses described direct voltage.

18. a power-converting device is characterized in that, comprising:

Power converter, it will become direct voltage from the AC voltage conversion that source power supply is supplied with, and this dc voltage conversion is become frequency arbitrarily;

Control device, it controls described power converter;

The speed command operational part, it indicates the speed of described power converter; With

Output voltage ordering calculation portion, it is based on described speed command, and the instruction of the output voltage of the described power converter output of computing is the output voltage command value;

Described control device is controlled described power converter according to the mode that described power converter is moved according to described voltage instruction value,

Described power-converting device has the described direct voltage of detection or infers described direct voltage or the portion of inferring of change value, when decelerate and when described detected value or presumed value become greater than setting, according to the described speed value of mode correction of the rising that suppresses described direct voltage.

19. the control method of a power-converting device, described power-converting device control power converter, described power converter will become direct voltage from the AC voltage conversion that source power supply is supplied with and this dc voltage conversion will be become frequency arbitrarily, the control method of this power-converting device is characterised in that

Computing is used to control the command value of power converter,

Detect the output voltage of described power converter,

Utilize this detected output voltage values and described output voltage command value, infer the value or the change value of described direct voltage,

According to this presumed value, when decelerate, revise in the described command value any one at least according to the mode of the rising that suppresses described direct voltage.

20. the control method of a power-converting device, described power-converting device control power converter, described power converter will become direct voltage from the AC voltage conversion that source power supply is supplied with and this dc voltage conversion will be become frequency arbitrarily, the control method of this power-converting device is characterised in that

The speed command that computing is indicated the speed of described power converter,

Based on described speed command, the instruction of the output voltage of the described power converter output of computing is the output voltage command value,

Detect described direct voltage or infer described direct voltage or the change value,

When decelerate and when described detected value or presumed value become greater than setting, according to the described speed value of mode correction of the rising that suppresses described direct voltage.

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