CN100557944C - AC motor system and control method, relevant power inverter - Google Patents
AC motor system and control method, relevant power inverter Download PDFInfo
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Abstract
Even purpose of the present invention also can suppress the power inverter of the change of direct voltage reliably for providing when harshnesses such as rapid acceleration-deceleration turn round.For with inverter side because of urgent acceleration-deceleration the time the flux regulator inverter output power that postpones the transition produce, being suppressed to can be by the value of rectifier correspondence, to be set in Power Limitation setting apparatus (76) according to the inverter output power maximum of rectifier control ability decision, set point with the Power Limitation setting apparatus, be input to Power Limitation arithmetic unit (77) by the current detection value of inverter output current detector (11) detection and the voltage detecting value that detects by inverter output voltage detector (12), in the Power Limitation arithmetic unit, calculate the inverter power value that calculates by current detection value and voltage detecting value and be no more than the such torque current limits value of described set point, limits value after the computing is input to torque current instruction limiter (78), the limits value torque-limiting current instruction value that basis is transfused in torque current instruction limiter.
Description
Technical field
The present invention relates to the control method of AC motor system, AC motor system and have the rectifier (converter) of driving alternating current motor and the power inverter of inverter (inverter), be particularly related to when the harshness running of urgent acceleration-deceleration etc., also be suitable for stably drive system and the not control method of the AC motor system of arresting stop, AC motor system and relative power inverter.
Background technology
As the power inverter that is used to drive alternating current motor etc., adopted and utilized rectifier that the power conversions of AC power is direct current, by inverter direct current is converted to the mode of interchange, the direct current portion between rectifier and inverter is connected with smmothing capacitor.And the control device of control rectifier is controlled the output current of rectifier, so that the both end voltage of the smmothing capacitor that is connected with direct current portion, promptly direct voltage becomes the value of regulation; The control device of control inverter is controlled the output current of inverter, so that the speed of alternating current motor becomes the value of regulation.Generally speaking, the inverter capacity designs according to the output characteristic of alternating current motor, and the described relatively inverter capacity of rectifier capacity is designed to corresponding with giving and accepting of electric power.
Here, exist at inverter side under the situation of load variations, because the delay of the DC voltage control system of rectifier side, direct voltage can change in the mode of transition.Therefore, the mode of Cai Yonging was in the past: the input and output electric power of computing inverter side, by its result being feedovered the ground add operation in the current-order of rectifier, (for example special content of opening flat 3-190594 communique) controlled in the change of direct voltage.
Patent documentation 1: the spy opens flat 3-190594 communique
When use has the alternating current motor that the band excitation of constant torque characteristic and constant output characteristic weakens, in constant output characteristic zone (excitation relief regions), control with speed is inversely proportional, make that with the magnetic flux that reduces motor output is constant.Here, exist the time constant of the design constant that depends on motor in the variation of general motor flux, for example under the situation of carrying out urgent accelerated service, change the reduction that postpones motor flux by relative velocity, may surpass constant output and can not become the constant output characteristic with transient mode in inverter one side.And, rectifier can't corresponding this moment transient mode surpass electric power the time, it is inconsistent that the giving and accepting of electric power can produce, and might produce the problem that direct voltage significantly changes.
For the steady running system, it is very important being controlled to be this direct voltage constant, in the prior art, by with the electric power of inverter with the mode add operation of feedforward in rectifier, has the effect that can suppress the direct voltage change that the control lag because of rectifier causes, but, to as described above because surpass that the inverter power of the control ability of rectifier surpasses the direct voltage change that causes to control be inoperative.In order under the harshness running of urgent acceleration-deceleration etc., also to make the system stability action, need to increase the rectifier capacity so that comprise that the electric power that surpasses of described transition also can be corresponding, perhaps need to increase the inverter capacity, but each method is all uneconomical for motor flux is sharply changed.
Summary of the invention
The objective of the invention is to, provide a kind of by also controlling the electric power that surpasses of transition when the running of harshness, make system stability action, thereby can design rectifier and inverter economically and can bootlessly not increase the AC motor system of transducer capacity, the control method and the relative power inverter of AC motor system.
To achieve these goals, in the present invention, more specifically, under the situation that frequency increases,, suppress to reduce the electric power increase that postpones the inverter that causes because of magnetic flux based on motor time constant by suppressing the output current of inverter.Perhaps constitute, according to the voltage and current of inverter, the torque current limits value of computing inverter is according to the torque current of the mode control inverter that is no more than the torque current limits value.By setting the power value of the inverter that rectifier can be corresponding, the input and output electric power that calculates inverter is no more than the torque current limits value of the such inverter side of aforementioned set point, with this torque current limits value torque-limiting current-order, control the electric power that surpasses of transition thus.In addition, for come according to the operating condition of rectifier corresponding by rectifier can correspondence the change of electric power amount, considered the variation of AC supply voltage and the set point of aforementioned power value carried out computing.And, as other method,, come the set point of the aforementioned power value of computing according to the surplus capacity of the relative rectifier current limits value of rectifier current command value.
According to the present invention, even when the running of harshness,, also can make the action of system stability ground by suppressing the electric power that surpasses of transition, thereby, rectifier and inverter can be designed economically, and the transducer capacity can be bootlessly do not increased.
Power inverter of the present invention possesses: the rectifier that AC power is converted to direct current power; Convert the alternating electromotive force of expected frequency to output with described rectifier, and offer the inverter of motor, under the situation that described frequency increases, the output current that suppresses described inverter, suppressing increases because of reduce the electric power that postpones the described inverter that causes based on the magnetic flux of described motor time constant, set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, and, control the torque current of described inverter according to the mode that is no more than described torque current limits value.
Description of drawings
Fig. 1 is the pie graph of the power inverter of expression first execution mode of the present invention.
Fig. 2 is the oscillogram when quickening usually.
Fig. 3 is the oscillogram when quickening rapidly.
The electric current of Fig. 4 alternating current motor and the polar plot of voltage.
Fig. 5 is other pie graphs of the power inverter of expression second execution mode of the present invention.
Fig. 6 is the pie graph of the power inverter of expression the 3rd execution mode of the present invention.
Fig. 7 is the pie graph of the power inverter of expression the 4th execution mode of the present invention.
Among the figure: the 1-AC power, the 2-rectifier, the 3-inverter, 4-motor, 5-smmothing capacitor, 6-rectifier control device, the 7-control device for inverter, 8, the 11-current detector, the 9-dc voltage detector, the 10-speed detector, 12-alternating voltage detector, 61-direct voltage command generator, 62-dc voltage controller, 63, the 74-current controller, 64, the 75-impulse generator, 65-rectifier current instruction limiter, 66,79-Power Limitation set point arithmetic unit, 71-speed command generator, the 72-speed control, 73-excitation current instruction arithmetic unit, 76-Power Limitation value setting apparatus, 77-Power Limitation arithmetic unit, 78-torque current instruction limiter.
Embodiment
Below, describe implementing best mode of the present invention with reference to accompanying drawing.
[embodiment 1]
Fig. 1 is a whole pie graph of the present invention.The 1st, AC power, the 2nd, the alternating electromotive force of described AC power 1 is converted to the rectifier of direct current power, the 3rd, the direct current power of described rectifier 2 outputs is converted to the inverter of desired electric power, the 4th, with the driven alternating current motor of electric power of described inverter 3 outputs, 5 are arranged on the smmothing capacitor between described rectifier and the inverter, the 6th, described rectifier 2 is operated so that direct voltage becomes the rectifier control device of setting, the 7th, described inverter 3 is operated so that the output torque of described motor 4 and speed satisfy the control device for inverter of desired characteristic.The 8th, current detector detects and exports the output current of described rectifier 2.The 9th, voltage detector detects the also both end voltage of output smoothing capacitor 5, i.e. direct voltage.The 10th, with motor 4 direct-connected speed detectors, detect the also speed of output motor.The 11st, current detector detects and exports the output current of described inverter 3.The 12nd, the alternating voltage detector detects and exports the output voltage of described inverter 3.The output signal of described current detector 8, dc voltage detector 9 is imported into rectifier control device 6, and rectifier control device 6 carries out various calculation process, the signal that output is operated described rectifier 2.The output signal of described speed detector 10, current detector 11, alternating voltage detector 12 is imported into control device for inverter 7, and control device for inverter 7 carries out various calculation process, the signal that output is operated described inverter 3.
Then, the main action to each control device describes.At first, in rectifier control device 6, be output to dc voltage controller 62 from the direct voltage command value of direct voltage command generator 61 outputs and the dc voltage detection value of exporting from dc voltage detector 9, computing and output rectifier output current command value in dc voltage controller 62 are so that dc voltage detection value is consistent with the direct voltage command value.Then, described rectifier output current command value and the rectifier output current detected value of exporting from current detector 8 are imported into current controller 63, computing and output rectifier voltage instruction value in current controller 63 are so that rectifier output current detected value is consistent with rectifier output current command value.Then, described rectifier voltage command value is imported into impulse generator 64, the pulse signal that the switch element of rectifier 2 is carried out on/off is also exported in computing in impulse generator 64, so that the rectifier output voltage of rectifier 2 is consistent with rectifier output voltage command value.
In control device for inverter 7, be imported into speed control 72 from the speed value of speed command generator 71 outputs and the speed detected value of exporting from speed detector 10, computing and export the torque current command value in speed control 72 is so that the speed detected value is consistent with speed value.And, the speed detected value also is imported into excitation current instruction arithmetic unit 73, computing and export the excitation current instruction value in the excitation current instruction arithmetic unit, this excitation current instruction value is used for reducing the magnetic flux of motor according to the speed detected value in constant output characteristic zone (excitation relief regions) when the alternating current motor that adopts band excitation with constant torque characteristic and constant output characteristic to weaken.Then, described torque current command value, excitation current instruction value and the inverter output current detected value of exporting from current detector 11 are imported into current controller 74, computing and output inverter voltage instruction value in current controller 74 are so that inverter output current detected value is consistent with current instruction value.Then, described contravarianter voltage command value is imported into impulse generator 75, the pulse signal that the switch element of inverter 3 is carried out on/off is also exported in computing in impulse generator 75, so that the inverter output voltage of inverter 3 is consistent with the inverter output voltage command value.
Then, control action of the present invention is described.At first, utilize Fig. 2 and Fig. 3, the movement of the inverter side the during alternating current motor that weakens for the accelerated band excitation, each controlled quentity controlled variable of rectifier side describes.Fig. 2 represents that the accelerating time ratio is big with the two-dimensional time constant of the flux change velocity correlation of motor, an example of each waveform when promptly slowly quickening.(a) be speed, quicken with the rate of change that relaxes.(b) be magnetic flux in the motor, more than base speed, to reduce with the inversely proportional relation of speed.(c) be exciting current, exciting current is controlled so that magnetic flux becomes the movement of (b), generally speaking, be applied in the differential component of the transformation period constant of having considered magnetic flux in the mode of transition.(d) be torque current, according to the load torque and the accelerating torque Be Controlled of necessity.(e) be the output power of inverter, electric power and speed increase pro rata till the base speed, the output that becomes constant more than the base speed (also being known as constant output characteristic zone or excitation relief regions more than the base speed).(f) be rectifier current, electric current is according to the output power Be Controlled of the inverter side of (e).And, (g) be direct voltage, in the electric power of rectifier, inverter was given and accepted, rectifier current Be Controlled (f) was so that this direct voltage becomes constant.On the other hand, Fig. 3 represents that the accelerating time is littler than the secondary time constant (2 Ci Time fixed number) of motor, an example of each waveform when promptly sharply quickening.(a) be speed, sharply quicken with fast rate of change.(b) be the interior magnetic flux of motor, according to the exciting current of more than base speed, controlling (c) in the mode that reduces with the inversely proportional relation of speed, but the accelerating time than the little situation of the two-dimensional time constant of motor under, for magnetic flux is sharply changed, increase differential component, if the current limit value restriction that this exciting current is determined according to the inverter capacity, then the minimizing of magnetic flux can produce delay.(d) be torque current, according to the load torque of necessity and accelerating torque and Be Controlled.(e) be the output power of inverter, should become the output of constant more than base speed, still, because the minimizing of magnetic flux postpones, make the product of speed and magnetic flux, promptly the induced voltage composition increases, and causes the increase of inverter output power.(f) be rectifier current, necessary electric current increases according to the increase of the output power of the inverter side of (e), and when surpassing the control ability of rectifier, electric current is by 65 restrictions of current-order limiter.And, (g) be direct voltage, because the electric current of rectifier side is limited, so the electric power of rectifier and inverter is given and accepted and produced inconsistently, causes direct voltage significantly to change.In the steady running of system, being controlled to be this direct voltage constant is that very important, rapid change also can impact the Current Control precision, exists the danger that causes system to stop because of overcurrent etc.In order to prevent this situation, needing increases the rectifier capacity that surpasses electric power that can corresponding comprise transition, or needs to increase the inverter capacity for motor flux is sharply changed, but these are all uneconomical.
Given this, flux regulator for will be because of the urgent acceleration-deceleration of inverter side the time postpones the inverter output power of the transition that produces, being controlled to be can be by the value of rectifier correspondence, to be set in Power Limitation value setting apparatus 76 by the inverter output power maximum of rectifier control ability decision, set point with Power Limitation value setting apparatus 76, be input in the Power Limitation arithmetic unit 77 by the current detection value of inverter output current detector 11 detections and the voltage detecting value that detects by alternating voltage detector 12 of inverter output, the inverter power value that calculates in Power Limitation arithmetic unit 77 by current detection value and the computing of voltage detecting value is no more than the such torque current limits value of described set point, limits value after the computing is input to torque current instruction limiter 78, the limits value torque-limiting current instruction value that basis is transfused in torque current instruction limiter 78.
Then, in Power Limitation arithmetic unit 77, carry out, calculate the method that the inverter power value is no more than the such torque current limits value of described set point by current detection value and voltage detecting value and set forth.Fig. 4 represents the electric current of inverter and the polar plot of voltage, and here, V1 is a primary voltage, and I1 is a primary current, and Ψ is a power factor, and Vd is the d shaft voltage, and Vq is the q shaft voltage, and Id is d shaft current (exciting current), and Iq is q shaft current (torque current).Ignore the transition item, Vd and the Vq during with vector control is expressed as (numerical expression 1) (numerical expression 2)
(numerical expression 1) Vd ≈ r1 * Id-ω 1 * L σ * Iq
(numerical expression 2) Vq ≈ r1 * Iq+ ω 1 * L σ * Id+ ω 1 * φ d
Here, r1, L σ are motor parameters, are respectively resistance, resultant impedance.And ω 1 is roughly consistent with speed with inverter frequency, and Φ d is a motor flux.And the output power Pinv of inverter is expressed as (numerical expression 3).
(numerical expression 3) Pinv=V1 * I1 * cos ψ=Vq * Iq+Vd * Id
As shown in Figure 3, when sharply quickening, at with the inversely proportional magnetic flux of speed, when the minimizing of the magnetic flux of reality has produced delay, the speed electromotive force of (numerical expression 2) or be known as the 3rd composition relative ideal value of induced voltage composition and increase, the inverter output power of (numerical expression 3) also increases.Given this, in the present invention, by the inverter output power maximum Pmax such torque current limits value Iqlim of (numerical expression 4) computing by the decision of rectifier control ability.
(numerical expression 4) Iqlim=(Pmax-Vd * Id)/Vq
And by the Iqlim torque-limiting current instruction value that is calculated by (numerical expression 4), the transition that can suppress inverter output increases.
In addition, in the present embodiment,, but adopt current instruction value, voltage instruction value to carry out computing, also can access same effect by current detection value, voltage detecting value computing torque current limits value.
Thus, when the harshness running of rapid acceleration-deceleration etc., also can suppress the change of direct voltage reliably, can bootlessly not increase the transducer capacity, thus can runs steadily and halt system not.
[embodiment 2]
Fig. 5 is other embodiment of apparatus of the present invention, substitute Power Limitation value setting apparatus 76, and Power Limitation set point arithmetic unit 79 is set and detects the power supply voltage variation amount detector 80 of the variation of AC power 1, detected power supply voltage variation amount is imported into described Power Limitation set point arithmetic unit 79, in Power Limitation set point arithmetic unit 79 according to power supply voltage variation amount computational calculation power limit setting value, set point after the computing is imported into Power Limitation arithmetic unit 77, and this point is different with Fig. 1.In Fig. 1, the inverter output power maximum that will be determined by the control ability of rectifier side is set in Power Limitation value setting apparatus 76 as fixed value, but the control ability of rectifier can change according to the operating condition of rectifier side.For example, when having produced the reduction of AC supply voltage, rectifier current value that can be corresponding with the output power of identical inverter increases.That is, the control ability of rectifier has reduced.Therefore, under the situation of the such fixed value of Fig. 1, when supply voltage reduces, might the Power Limitation function can not bring into play function well, cause direct voltage significantly to change.Can consider that also supply voltage reduces and increase in advance the Power Limitation set point, still might bootlessly suppress the torque current command value of inverter side usually.Given this, in Fig. 5 according to power supply voltage variation amount computational calculation power limit setting value.
Thus, also can be corresponding because of power supply voltage variation causes the variation of rectifier control ability, can control the change of direct voltage reliably, obtain the effect that is equal to Fig. 1.
[embodiment 3]
Fig. 6 is other embodiment of apparatus of the present invention, and in the current-order limiter 65 of rectifier side, the surplus capacity of the relative rectifier current limits value of output rectifier current-order is input to load limiter set point arithmetic unit 79.In power limited set point arithmetic unit 79, according to the surplus capacity computational calculation power qualification set point of rectifier current instruction, the set point that calculates is imported into Power Limitation arithmetic unit 77, and this point is different with Fig. 5.In Fig. 5, only the change with the rectification control ability is made as power supply voltage variation.But though the influence of power supply voltage variation is big, change of the efficient of transformer or direct voltage change wait other multiple factor also can make the control ability change.Therefore, influence caused rectifier control ability change, can cause the Power Limitation function can not play a role well, the possibility that has direct voltage significantly to change by these.On the other hand, the change of the rectifier control ability that causes because of these influences, dc voltage controller by rectifier is reflected in the rectifier current command value, relatively the surplus capacity of rectifier current limits value represented to comprise the power shortage amount of influential aspect.Therefore, in Fig. 6, according to the surplus capacity of rectifier current command value, computational calculation power limiter set point.
Thus, can suppress the change of direct voltage reliably, obtain the effect that is equal to Fig. 1 corresponding to the variation of the rectifier control ability that comprises all factors.
[embodiment 4]
Fig. 7 is other embodiment of the present invention, be with the difference of Fig. 6, a plurality of inverters are connected with public rectifier, and the power limited arithmetic unit 77 in alternative each control device for inverter, power limited set point arithmetic unit 66 is set in rectifier control device 6, will be at each control device for inverter 7a, 7b, 7c, in the output power of each inverter of calculating, instruct the surplus capacity of relative rectifier current limits value together to be input to Power Limitation set point arithmetic unit 66 with rectifier current, in Power Limitation set point arithmetic unit 66, surplus capacity and each inverter output power according to the rectifier current instruction, the Power Limitation set point of each inverter of computing, this operation values is imported into each inverter controlling apparatus 7a, 7b, 7c, in Power Limitation arithmetic unit 77, limit the torque current command value of each inverter.Under a plurality of inverters and situation that public rectifier is connected, the total output power control rectifier current according to the output power of each inverter is controlled to be direct voltage constant.Here, in the harshness running of promptly quickening by each inverter etc., when making that amounting to output power has surpassed the control ability of rectifier, exist the danger that direct voltage can produce big change equally with single rectifier/inverter system.Therefore, among Fig. 7 Power Limitation set point arithmetic unit 66 is arranged on the rectifier side, according to the surplus capacity computational calculation power limit setting value of rectifier current command value,, described Power Limitation set point is assigned to each Power Limitation set point of each inverter according to the situation of each inverter.Distribution method can apply the Power Limitation set point for the inverter of output maximum power in each inverter, because the output of each inverter determines by capacity, so, the Power Limitation set point that also can distribute each inverter by Capacity Ratio.And, also can consider the importance degree as system of each inverter to apply the Power Limitation set point to the low inverter of importance degree.In addition, instruct the surplus capacity of relative rectifier current limits value though in Fig. 7, imported rectifier current to Power Limitation set point arithmetic unit 66, but also can be as shown in Figure 5, according to the power supply voltage variation amount, computational calculation power limit setting value, can also be as shown in Figure 1, will amount to the output power maximum by the inverter of rectifier control ability decision and give as the Power Limitation set point and be fixed value, it is distributed to each inverter as mentioned above.
Thus, with also controlling the change of direct voltage in a plurality of inverters and the system that public rectifier is connected reliably, obtain and Fig. 1, Fig. 5, the equal effect of Fig. 6.
Claims (16)
1, a kind of power inverter possesses: the rectifier that AC power is converted to direct current power; Convert the alternating electromotive force of expected frequency to output, and offer the inverter of motor described rectifier,
Under the situation that described frequency increases, suppress the output current of described inverter, suppress because of the magnetic flux based on described motor time constant reduces the electric power increase that postpones the described inverter that causes,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, and, control the torque current of described inverter according to the mode that is no more than described torque current limits value.
2, a kind of power inverter possesses: the rectifier that AC power is converted to direct current power; Convert the alternating electromotive force of expected frequency to output, and offer the inverter of motor described rectifier,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, and, control the torque current of described inverter according to the mode that is no more than described torque current limits value.
3, power inverter according to claim 2 is characterized in that,
Come the peaked set point of electric power of the inverter that the computing rectifier can be corresponding according to the power supply voltage variation detected value.
4, power inverter according to claim 2 is characterized in that,
According to the surplus capacity of the relative rectifier current limits value of rectifier current command value, come the peaked set point of electric power of the inverter that the computing rectifier can be corresponding.
5, a kind of power inverter possesses: the rectifier that AC power is converted to direct current power; With a plurality of inverters of shared described rectifier, with the output branch of described rectifier, make it convert the alternating electromotive force of expected frequency respectively to by described a plurality of inverters, offer motor,
Setting rectifier can corresponding electric power maximum, the electric power maximum of distributing described each inverter according to described electric power maximum, according to the voltage of described inverter and the electric current of described inverter, calculate the torque current limits value that is no more than such described each inverter of described electric power maximum that described each inverter is assigned with, according to described each torque current limits value, the torque current of described each inverter of restriction.
6, power inverter according to claim 5 is characterized in that,
Come the peaked set point of electric power that the computing rectifier can be corresponding according to the power supply voltage variation detected value.
7, power inverter according to claim 5 is characterized in that,
According to the surplus capacity of the relative rectifier current limits value of rectifier current command value, come the peaked set point of electric power that the computing rectifier can be corresponding.
8, according to each described power inverter in the claim 5,6,7, it is characterized in that,
When distributing the electric power maximum of each inverter, the electric power maximum of each inverter is distributed to the inverter of output maximum power.
9, according to each described power inverter in the claim 5,6,7, it is characterized in that,
When distributing the electric power maximum of each inverter, the electric power maximum of recently distributing each inverter according to the capacity of each inverter.
10, according to each described power inverter in the claim 5,6,7, it is characterized in that,
When distributing the electric power maximum of each inverter, considered each inverter in system importance and the electric power maximum of distributing each inverter.
11, a kind of control method of electric power converter,
Convert AC power to direct current power by rectifier,
Convert the output of described rectifier the alternating electromotive force of expected frequency to by inverter, and offer motor,
Under the situation that described frequency increases, suppress the output current of described inverter, suppress because of the magnetic flux based on described motor time constant reduces the electric power increase that postpones the described inverter that causes,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, and, control the torque current of described inverter according to the mode that is no more than described torque current limits value.
12, a kind of control method of electric power converter,
Convert AC power to direct current power by rectifier,
Convert the output of described rectifier the alternating electromotive force of expected frequency to by inverter, and offer motor,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, according to the mode that is no more than described torque current limits value, control the torque current of described inverter.
13, a kind of control method of electric power converter,
Convert AC power to direct current power by rectifier,
Branch is carried out in output to described rectifier, converts thereof into the alternating electromotive force of expected frequency by a plurality of inverters, and offers motor,
Set the electric power maximum that described rectifier can be corresponding,
According to described electric power maximum, distribute the electric power maximum of described each inverter,
According to the voltage of described inverter and the electric current of described inverter, calculate the torque current limits value that is no more than such described each inverter of described electric power maximum that described each inverter is assigned with,
According to described each torque current limits value, the torque current of described each inverter of restriction.
14, a kind of AC motor system has: AC power converted to the rectifier of direct current power, the output of described rectifier converted to the inverter of alternating electromotive force of expected frequency and the motor that is rotated with the output of described inverter,
Under the situation that described frequency increases, suppress the output current of described inverter, suppress because of the magnetic flux based on described motor time constant reduces the electric power increase that postpones the described inverter that causes,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, and, control the torque current of described inverter according to the mode that is no more than described torque current limits value.
15, a kind of AC motor system has: AC power converted to the rectifier of direct current power, the output of described rectifier converted to the inverter of alternating electromotive force of expected frequency and the motor that is rotated with the output of described inverter,
Set the electric power maximum of the inverter that rectifier can be corresponding, voltage and current according to described inverter, and the electric power maximum after the described setting, the torque current limits value of computing inverter, according to the mode that is no more than described torque current limits value, control the torque current of described inverter.
16, a kind of AC motor system, have: convert AC power to the rectifier of direct current power and a plurality of inverters of shared described rectifier,, make it convert the alternating electromotive force of expected frequency respectively to by described a plurality of inverters with the output branch of described rectifier, offer motor
Setting rectifier can corresponding electric power maximum, the electric power maximum of distributing described each inverter according to described electric power maximum, according to the voltage of described inverter and the electric current of described inverter, calculate the torque current limits value that is no more than such described each inverter of described electric power maximum that described each inverter is assigned with, according to described each torque current limits value, the torque current of described each inverter of restriction.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006034644 | 2006-02-13 | ||
| JP2006034644A JP5124954B2 (en) | 2006-02-13 | 2006-02-13 | AC motor system, control method of AC motor system, and power conversion apparatus related thereto |
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| CN101022261A CN101022261A (en) | 2007-08-22 |
| CN100557944C true CN100557944C (en) | 2009-11-04 |
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| JP (1) | JP5124954B2 (en) |
| CN (1) | CN100557944C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5024827B2 (en) * | 2006-09-27 | 2012-09-12 | 東芝キヤリア株式会社 | Inverter device |
| CN101453191B (en) * | 2007-12-07 | 2010-07-14 | 上海智维电子科技有限公司 | Ultra-start-up control driving power for digital controlled air weaving machine |
| CN101753096B (en) * | 2009-11-10 | 2012-11-14 | 中国船舶重工集团公司第七一二研究所 | Power limiter and power control method |
| JP5691499B2 (en) * | 2010-12-24 | 2015-04-01 | ダイキン工業株式会社 | Hybrid work machine |
| DE102011075141A1 (en) * | 2011-05-03 | 2012-11-08 | Robert Bosch Gmbh | Method and device for operating a power tool |
| JP2013017305A (en) * | 2011-07-04 | 2013-01-24 | Fanuc Ltd | Motor control device having energy storage section |
| JP5811363B2 (en) * | 2013-03-13 | 2015-11-11 | 株式会社デンソー | Rotating electrical machine control device and electric power steering device using the same |
| CN105629871B (en) * | 2014-11-06 | 2018-03-27 | 安川电机（沈阳）有限公司 | The control method of servomotor, device and servo-drive system in servo-drive system |
| CN107005195B (en) * | 2014-11-26 | 2019-03-01 | 日产自动车株式会社 | The control device and control method of motor |
| US9634603B2 (en) * | 2015-08-24 | 2017-04-25 | Hamilton Sundstrand Corporation | Power limiting for motor current controllers |
| US10843793B2 (en) | 2017-05-31 | 2020-11-24 | Simmonds Precision Products, Inc. | Electronic braking arrangements |
| WO2019163110A1 (en) * | 2018-02-23 | 2019-08-29 | 三菱電機株式会社 | Motor drive device |
| EP3782278A4 (en) * | 2018-04-19 | 2021-11-10 | ABB Schweiz AG | System and method for power conversion |
| DE102018213939A1 (en) | 2018-08-17 | 2020-02-20 | Continental Teves Ag & Co. Ohg | Method for operating a permanent magnet synchronous motor, electronic control device, motor arrangement and storage medium |
| JP7092620B2 (en) * | 2018-08-31 | 2022-06-28 | 株式会社日立産機システム | Power conversion system and motor control method |
| US11817797B2 (en) * | 2019-08-20 | 2023-11-14 | Toshiba Mitsubishi- Electric Industrial Systems | DC-AC converter with inrush current suppression |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09266700A (en) * | 1996-03-27 | 1997-10-07 | Meidensha Corp | Stable operation method of vector controller |
| JP2002272153A (en) * | 2001-03-08 | 2002-09-20 | Okuma Corp | Motor controller |
| JP4474784B2 (en) * | 2001-03-26 | 2010-06-09 | 株式会社安川電機 | Multi-axis motor controller |
| JP2003348892A (en) * | 2003-04-21 | 2003-12-05 | Hitachi Ltd | Control unit for a plurality of motors, power converter, inverter module and converter module |
-
2006
- 2006-02-13 JP JP2006034644A patent/JP5124954B2/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
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| JP5124954B2 (en) | 2013-01-23 |
| CN101022261A (en) | 2007-08-22 |
| JP2007215365A (en) | 2007-08-23 |
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