JP5733257B2 - Rotating electrical machine control device - Google Patents

Description

  The present invention relates to a rotating electrical machine control device, and more particularly to a rotating electrical machine control device in which feedback is performed based on a current flowing through the rotating electrical machine.

  As a control mode of a rotating electrical machine, a sine wave PWM (Pulse Width Modulation) control mode, an overmodulation control mode, and a rectangular wave control mode are known. In the sine wave PWM control mode and the overmodulation control mode, current feedback for feeding back the current value flowing through the rotating electrical machine to the current command value is performed. In the rectangular wave control mode, phase control is performed in which the current value flowing through the rotating electrical machine is converted into torque and fed back to the torque command value to control the phase.

  As described above, in the operation control of the rotating electrical machine, the value of the current flowing through the rotating electrical machine is acquired. Since the current flowing through the rotating electrical machine fluctuates, the current is acquired at a predetermined sampling timing.

  For example, Patent Document 1 describes a method of preventing the occurrence of aliasing in current sampling by increasing the rotation speed of an electric motor in an electric motor drive control device. When the number of motors N = 2 and rectangular wave control is selected as a synchronous mode for synchronizing the electrical angle cycle of the motor and the switching cycle of the inverter, the current detection process for detecting the current of the motor is performed according to the carrier cycle. The voltage control process is performed at a reference calculation cycle set to 1/2, the voltage control process is performed at a cycle N times the reference calculation cycle, and the current detection value for N times is fed back to perform one voltage control process. It is stated. On the other hand, when sine wave PWM control or overmodulation control is selected as the asynchronous mode, the voltage control process is performed every reference calculation cycle, the current detection process is performed at a cycle N times the reference calculation process, and 1 It is stated that N times of voltage control processing is performed by feeding back current detection values.

  Patent Document 2 describes that as a motor control device, a PWM signal is calculated according to phase difference data that is a phase difference of a motor current with respect to a motor drive voltage, and phase difference control feedback is performed. Here, the sampling of the motor current signal used for the calculation of the phase difference data is set to a fixed number of samplings for one rotation of the motor regardless of the number of rotations of the motor. Therefore, it is stated that the sampling interval is changed in accordance with the change in the rotational speed of the motor.

JP 2011-83068 A JP 2003-111484 A

  Since sampling obtains data discretely, the data may not be accurately reflected depending on the degree of sampling. For example, in the case of synchronous sampling in which the number of samplings per period of periodic data is set in advance as the synchronization number, the appearance of the sampled data changes when the synchronization number is changed. This is a kind of aliasing phenomenon. In the case of current sampling for rotating electrical machines, when the number of synchronizations is changed, the current appearance changes, and even though the same current value is sampled, there is a deviation in the detected current value before and after the change in the number of synchronizations. looks like.

  In the control of a rotating electrical machine, when this current deviation is fed back, the current deviation is tried to be zero even though there is no actual change in the current value. Will occur.

  In particular, when the control mode of the rotating electrical machine is switched, the number of synchronizations of current sampling is changed, so that an inappropriate current such as an overcurrent may occur immediately after the control mode is switched. Even in the same control mode, in order to suppress the load of the control process, the minimum number of samplings is set each time according to the state of the rotational speed. For this reason, a change in the number of samplings always occurs in the middle of the same control mode, and in that case, there is a possibility that an inappropriate current such as an overcurrent is similarly generated.

  An object of the present invention is to provide a rotating electrical machine control device that can perform good control even if the number of times of sampling for detecting a current flowing through the rotating electrical machine is changed. Another object is to provide a rotating electrical machine control device capable of performing good control even when the number of times of sampling for detecting the current flowing through the rotating electrical machine is changed in accordance with switching of the control mode of the rotating electrical machine. .

The rotating electrical machine control device according to the present invention includes a current sampling unit that samples the current of the rotating electrical machine at a preset timing of the number of times of electrical sampling of the rotating electrical machine, and a change in the number of samplings according to the operating state of the rotating electrical machine. When determining the current value that flows through the rotating electrical machine from the current waveform restored based on the detected values of multiple current samplings and the sampling number setting unit that performs the setting, the appearance of the restored current waveform can be changed by changing the number of samplings. characterized in that it comprises changing the current command value correcting portion for correcting the current command value to compensate for the detected current deviation current value appears to change flow to the rotating electrical machine based on the time of changing the sampling number to, the And

  Moreover, the rotating electrical machine control device according to the present invention preferably includes a storage unit that obtains and stores in advance a relationship between a correction value for the current command value and the number of samplings.

  In the rotating electrical machine control device according to the present invention, the sampling number setting unit switches the control mode of the rotating electrical machine from the rectangular wave control mode to the overmodulation control mode, and from the overmodulation control mode to the rectangular wave control mode. It is preferable to change and set the number of samplings in accordance with any of the switching times.

  With the above configuration, the rotating electrical machine control device corrects the current command value that compensates for the detected current deviation caused by changing the number of samplings. As a result, the detected current deviation is not fed back to the original current command value, but is fed back to the corrected current command value, so that good control can be performed even when the number of samplings is changed.

  Further, since the relationship between the correction value for the current command value and the number of samplings is obtained and stored in advance in the rotating electrical machine control device, good control can be performed even when changing the number of samplings using the relationship.

  Further, in the rotating electrical machine control device, even when the setting for changing the number of times of sampling is performed in accordance with the switching of the control mode of the rotating electrical machine, the current command value is corrected, so that good control can be performed even when the control mode is switched. It can be performed.

It is a block diagram of the rotary electric machine control system containing the rotary electric machine control apparatus of embodiment which concerns on this invention. In embodiment which concerns on this invention, it is a figure explaining the subject when change of the frequency | count of sampling is performed. It is a flowchart which shows the procedure of the rotary electric machine control in embodiment which concerns on this invention. It is a figure explaining the effect of the rotary electric machine control in embodiment which concerns on this invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In the following, a control system for a rotating electrical machine mounted on a vehicle will be described as a rotating electrical machine control system in which the rotating electrical machine control device is used. This is an illustrative example, and is a control system for a stationary rotating electrical machine. There may be. In addition, although the controlled rotating electric machine is described as one unit, of course, a plurality of rotating electric machines may be controlled.

  Hereinafter, it will be described that the number of samplings for current detection is changed when the control mode of the rotating electrical machine is switched from the rectangular wave control mode to the overmodulation control mode. It is an example for demonstrating a change of. It may be a change in the number of samplings when switching the control mode other than this. For example, the number of samplings may be changed when switching from the overmodulation control mode to the rectangular wave modulation mode. In some cases, the number of samplings may be changed when switching between the sine wave PWM control mode and the overmodulation control mode. Further, it may be a change in the number of samplings that occurs during execution of the same control mode.

  Values such as the number of synchronizations described below are examples for explanation, and these values can be appropriately changed according to the specifications of the rotating electrical machine control system.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a configuration diagram of a rotating electrical machine control system 10. The rotating electrical machine control system 10 includes a rotating electrical machine 12, a drive circuit unit 14 connected to the rotating electrical machine 12, a current sampling unit 30 that samples and obtains data related to the current flowing through the rotating electrical machine 12, and performs these operations as a whole. The rotating electrical machine control device 40 that is controlled as follows is configured.

  The rotating electrical machine 12 is a motor / generator (MG) mounted on a vehicle, and is a three-phase synchronous rotating electrical machine that functions as a motor when electric power is supplied and functions as a generator during braking.

  The drive circuit unit 14 includes a power storage device 16, a voltage converter 20, an inverter 24, and smoothing capacitors 18 and 22.

  The power storage device 16 is a chargeable / dischargeable high voltage secondary battery. Specifically, it is a lithium ion assembled battery having a terminal voltage of about 200V to about 300V. The assembled battery is obtained by combining a plurality of batteries each having a terminal voltage of 1 V to several V, called a single battery or a battery cell, to obtain the predetermined terminal voltage. As the power storage device 16, a nickel metal hydride battery, a large capacity capacitor, or the like can be used.

  The voltage converter 20 is a circuit that is disposed between the power storage device 16 and the inverter 24 and has a DC voltage conversion function. The voltage converter 20 includes a reactor and a switching element. As the voltage conversion function, the voltage on the power storage device 16 side is boosted using the reactor energy storage action and supplied to the inverter 24 side, and the electric power from the inverter 24 side is stepped down to the power storage device 16 side for charging. And a step-down function for supplying electric power.

  The inverter 24 is a circuit connected to the rotating electrical machine 12 and includes a plurality of switching elements, reverse connection diodes, and the like, and has a function of performing power conversion between AC power and DC power. That is, the inverter 24 has a quadrature conversion function for converting the DC power from the power storage device 16 side to AC three-phase driving power and supplying the rotating electrical machine 12 as AC driving power when the rotating electric machine 12 functions as a motor. . Further, when the rotating electrical machine 12 functions as a generator, it has an AC / DC converting function that converts AC three-phase regenerative power from the rotating electrical machine 12 into DC power and supplies it as a charging current to the power storage device 16 side.

The voltage between the positive electrode side wiring and the negative electrode side wiring of the inverter 24 is an input DC voltage to the inverter 24 and is called a system voltage V _H. The system voltage V _H is detected by an appropriate voltage detection device, and the data is transmitted to the rotating electrical machine control device 40 through an appropriate signal line.

  Smoothing capacitors 18 and 22 provided between the power storage device 16 and the voltage converter 20 and between the voltage converter 20 and the inverter 24 are capacitive elements having a function of smoothing voltage and current.

The current sampling unit 30 is a data sampling device having a function of acquiring data of a current flowing through the rotating electrical machine 12 at a predetermined sampling timing and transmitting the data to the rotating electrical machine control device 40. Specifically, the current flowing through the three-phase power line connecting the inverter 24 and the rotating electrical machine 12 is detected by an appropriate current sensor. When the three-phase winding of the rotating electrical machine 12 has a neutral point, the U-phase current value I _U flowing through the U-phase winding constituting the three-phase winding, the V-phase current value I _V flowing through the V-phase winding, The W-phase current value I _W flowing through the W-phase winding has a relationship of I _U + I _V + I _W = 0. Therefore, if two current values in I _U , I _V , and I _W are detected, the other current value can be determined. Therefore, in FIG. 1, two of I _U and I _V are sampled.

  The resolver 32 provided in the rotary electric machine 12 is a rotation angle sensor having a function of detecting the rotation angle θ of the rotor of the rotary electric machine 12 and transmitting it to the rotary electric machine control device 40.

The rotating electrical machine control device 40 follows the torque command value 38 instructed by a vehicle accelerator, brake, etc. (not shown), and based on the system voltage V _H , current values I _U , I _V , and the rotation angle θ, the rotating electrical machine 12. The function of controlling the operation of The rotating electrical machine control device 40 can be configured by a computer suitable for mounting on a vehicle.

The rotating electrical machine control device 40 includes a sine wave PWM control unit 42, an overmodulation control unit 44, and a rectangular wave control unit 46. These have a function of performing control corresponding to each of a sine wave PWM control mode, an overmodulation control mode, and a rectangular wave control mode as control modes of the rotating electrical machine 12. The control mode switching unit 48 of the rotating electrical machine control device 40 has a function of switching the control mode between the three control modes according to the torque command value 38 and the operating state of the rotating electrical machine 12. The sampling number setting unit 50 has a function of changing and setting the sampling frequency for acquiring the current values I _U and _IV according to the operating state of the rotating electrical machine 12. As the frequency of sampling, the number of times of sampling for one electrical cycle of the rotating electrical machine 12 can be used. The current command value correction unit 52 has a function of correcting a current command value used for controlling the rotating electrical machine 12 according to a change in the number of samplings.

  These functions can be realized by executing software. Specifically, it is realized by executing a rotating electrical machine control program. Some of these functions may be realized by hardware.

  The storage device 54 connected to the rotating electrical machine control device 40 has a function of storing a program and the like, and particularly has a function of storing a correction value table 56 used in the current command value correction unit 52 here.

Regarding the operation of the above configuration, in particular, each function of the rotating electrical machine control device 40 will be described in detail with reference to the drawings as necessary. First, it will be described that the current values I _U and I _V are used for control in any of the three control modes of the rotating electrical machine 12, and then, when the number of sampling times of current detection changes, how the detected current looks Will be described, and then the contents of the rotating electrical machine control for solving the problem will be described.

  First, the three control modes of the rotating electrical machine 12 and the contents of the sine wave PWM control unit 42, the overmodulation control unit 44, and the rectangular wave control unit 46 that control this will be described.

The sine wave PWM control unit 42 receives the torque command value 38, the current values I _U and I _V detected by the current sampling unit 30, and the rotation angle θ detected by the resolver 32. A switching control signal for the inverter 24 is generated so that torque according to the value 38 is output. Specifically, the sine wave PWM control unit 42 detects a current command value corresponding to the torque command value 38 based on the torque command value 38, the current values I _U and I _V, and the rotation angle θ. Current deviations ΔI _d and ΔI _q which are deviations between the current value calculated based on the current values I _U and I _V and the current command value are calculated.

Based on the current deviations ΔI _d and ΔI _q , the sine wave PWM control unit 42 calculates voltage command values V _d ^# and V _q ^# that are command values for the voltage applied to the rotating electrical machine 12. Based on the voltage command values V _d ^# and V _d ^# , a switching control signal for the inverter 24 is generated.

The overmodulation control unit 44 receives the torque command value 38, the current values I _U and I _V detected by the current sampling unit 30, and the rotation angle θ detected by the resolver 32 to drive the inverter 24. The switching control signal is generated. The overmodulation control unit 44 calculates the current deviations ΔI _d and ΔI _q and the voltage command values V _d ^# and V _q ^# by performing the same calculation as the calculation by the sine wave PWM control unit 42, and also performs the switching control. Generate a signal.

The rectangular wave control unit 46 receives the torque command value 38, the current values I _U and I _V detected by the current sampling unit 30, and the rotation angle θ detected by the resolver 32. The rectangular wave control unit 46 calculates an estimated torque value based on the detected current values I _U and I _V , the calculated current value I _W and the applied voltage to each phase of the rotating electrical machine 12. The rectangular wave control unit 46 sets a voltage phase to be applied to the inverter 24 based on a deviation between the estimated torque value and the torque command value 38, and generates a switching control signal based on the voltage phase.

Note that each control mode can be switched based on the modulation rate. The modulation factor is calculated from the voltage command values V _d ^# , V _q ^# and the system voltage V _H in the sine wave PWM control mode and the over modulation control mode. In the rectangular wave control mode, a voltage indicating a deviation of the voltage command value when the rectangular wave voltage control is executed with respect to the voltage command values V _d ^# and V _q ^# in the sine wave PWM control or overmodulation control corresponding to the torque command value 38. Calculated based on the deviation.

  The control mode switching unit 48 of the rotating electrical machine control device 40 switches to the sine wave PWM control mode when the calculated modulation factor is 0.61 or less, and overmodulates when the modulation factor exceeds 0.61 and less than 0.78. When the modulation rate is 0.78 in the control mode, the control mode is switched so that the rectangular wave control mode is set.

Thus, since the current values I _U and I _V are used for control in any of the three control modes of the rotating electrical machine 12, it is important that the current values I _U and I _V are detected correctly. The current values I _U and I _V are acquired by sampling the current flowing through the three-phase power line connecting the inverter 24 and the rotating electrical machine 12 with a current sensor. Here, when the number of times of sampling is changed, the appearance of the detected current changes, and the current values I _U and I _V may differ even though the same current is detected.

  FIG. 2 is a diagram for explaining a state in which a change in the number of samplings is simultaneously performed when the control mode is switched from the rectangular wave control mode to the overmodulation control mode.

  Here, the number of times of sampling is indicated by the number of times of sampling per electrical cycle of the rotating electrical machine 12. Since the sampling timing is synchronized with one electrical cycle, the number of samplings is the number of synchronizations in this case. Sampling times change settings, i.e. the synchronization speed of the new settings may have been defined or set by changing beforehand how the operating state of the torque command value 38 and the rotary electric machine 12. The change setting of the number of samplings is executed by the function of the sampling number setting unit 50 of the rotating electrical machine control device 40.

  For example, since the rectangular wave control mode is often executed when the torque command value 38 is a high value, the number of synchronizations may be small. However, when the torque command value 38 is a low value, the sine wave PWM control is performed. The mode is often executed, and the synchronization number is set large. Further, if the number of times of sampling is increased, control processing becomes frequent, and the load on the computer that is the rotating electrical machine control device 40 becomes heavy. Therefore, considering the load on the computer, it is preferable to set the number of synchronizations to a minimum value as long as there is no problem in control. For these reasons, the synchronization number is changed and set according to the torque value indicating the operating state of the rotating electrical machine 12, the number of rotations, and the like.

The horizontal axis of FIG. 2 is a time axis indicating time, the time t ₀ is the time at which the control mode is switching from the rectangular wave control mode to the overmodulation control mode has been performed. The vertical axis represents the current value, the current command value 60 are not changed before and after the time t _0.

Here, the number of samplings N is set to N = 12 in the rectangular wave control mode, that is, before time t ₀ , and is set to N = 36 in the overmodulation control mode, that is, after time t _0. . N is the number of synchronizations, and the number of synchronizations 12 indicates that the current value is sampled every 30 degrees obtained by equally dividing the angle 360 degrees of the electrical cycle by 12. Therefore, when the synchronization number N = 36, the current value is sampled every 10 degrees in angle. Of course, these synchronization numbers are merely examples, and other synchronization numbers may be used.

Therefore, the synchronization number at time _{t 0} is suddenly changed from N = 12 to N = 36. Since sampling is a discrete interval when data is collected discretely, the appearance of the data differs depending on the sampling method. In Figure 2, the time t ₀ and the current waveform 62 which is restored on the basis of the current value detected in the previous N = 12 sampling, the true current waveform 64 at time t ₀ after the time t ₀ after the N = Each of the current waveforms 66 restored based on the current values detected in 36 samplings is shown.

Thus, the time t ₀ as a boundary, a large difference between the reconstructed current waveforms 62 and 66 appears on the basis of the current value detected by sampling. This is a kind of aliasing phenomenon. As a result, a current deviation 70 occurs between the current command value 60 and the detected current value 68 obtained from the current waveform 66 at time t ₀ .

  As described above, in each control mode of the rotating electrical machine 12, the detected current value is used for control. In the overmodulation control mode, feedback control is performed so that the current deviation, which is the difference between the detected current value and the current command value, is zero. In this case, the control works so that the detected current value 68 approaches the current command value 60, and the current supply to the rotating electrical machine 12 increases rapidly. This causes an unexpected overcurrent. This is the problem to be solved by the present invention.

  FIG. 3 is a flowchart showing the procedure of the rotating electrical machine control executed in the configuration of FIG. Each procedure corresponds to each processing procedure of the rotating electrical machine control program.

  When the rotating electrical machine control system 10 is started, the rotating electrical machine control program is launched. Then, it is determined whether or not the control mode is switched (S10). This processing procedure is executed by the function of the control mode switching unit 48 of the rotating electrical machine control device 40. Since the control mode is switched according to the modulation rate, it is performed by monitoring the modulation rate in the current rotating electrical machine control. For example, when the modulation rate is less than 0.78, it is determined that it is the switching timing from the rectangular wave control mode to the overmodulation control mode. FIG. 2 shows such a case.

  If the determination in S10 is affirmative, the sampling number is changed and set before switching the control mode (S12). This processing procedure is performed by the function of the sampling number setting unit 50 of the rotating electrical machine control device 40. The number of samplings is set according to the torque value indicating the operating state of the rotating electrical machine 12, the number of rotations, etc., but when the control mode is switched, the operating state of the rotating electrical machine 12 is changed stepwise. Since it is time, the change setting of the number of times of sampling is performed. In the case of FIG. 2, along with switching from the rectangular wave control mode to the overmodulation control mode, the number of synchronizations that is the number of samplings is changed from N = 12 to N = 36.

  Next, a correction value of the current command value is obtained before switching the control mode and changing the number of samplings (S14). As described with reference to FIG. 2, the correction value of the current command value causes a current deviation 70 due to a change in the number of samplings. The correction value of the current command value 60 necessary to compensate for the current deviation 70. It is. In the example of FIG. 2, if the current deviation 70 is subtracted from the current command value 60 to obtain a new current command value, the current deviation between the detected current value 68 and the current command value 60 can be set to zero. Therefore, the correction value of the current command value 60 necessary for compensating the current deviation 70 is obtained by adding a minus sign to the absolute value of the current deviation 70.

  The correction value of the current command value 60 necessary to compensate the current deviation 70 is determined in advance by experiment, calculation, or simulation if the specifications of the rotating electrical machine 12, the current torque magnitude of the rotating electrical machine 12, and the number of samplings are determined. You can ask for it. The correction value table 56 stored in the storage device 54 connected to the rotating electrical machine control device 40 is a lookup format, and uses the type of the rotating electrical machine 12, the current torque magnitude of the rotating electrical machine 12, and the number of samplings as a search key. The correction value of the current command value 60 necessary for compensating the current deviation 70 can be read.

  The correction value table 56 may be expressed in a format such as a map format or a calculation formula format in addition to the format of the lookup table.

  When the correction value for the current command value is determined in S14, the current command value is then corrected (S16). This processing procedure is executed by the function of the current command value correction unit 52 of the rotating electrical machine control device 40. After that, the control mode is switched and the number of samplings is changed (S18). However, depending on the control timing of the rotating electrical machine control device 40, the execution of the content of S18 may be accelerated. For example, the actual switching of the control mode may be performed after S10 and before S12, and the actual number of samplings may be changed after S12 and before S14.

FIG. 4 is a diagram corresponding to FIG. 2, but shows a state when the current command value is corrected to a new current command value 72 at time t ₀ . The difference between the current command value 60 before time t ₀ and the current command value 72 after time t ₀ is a correction value 74. Here, at the same timing as the correction of the current command value 72, the control mode is switched from the rectangular wave control mode to the overmodulation control mode, and at the same time, the number of samplings is changed from N = 12 to N = 36.

The current waveform 76 is a true current waveform after time t ₀ , and the current waveform 78 is a current waveform restored based on the current value detected by sampling of N = 36 after time t ₀ . As shown here, there is no current deviation between the current waveform 78 and the new current command value 72.

In the above description, a case has been described in which the current waveform 66 restored based on the current value detected by sampling becomes smaller than the true current waveform 64 by changing the number of samplings. This may be reversed depending on the specifications of the rotating electrical machine 12, the current torque of the rotating electrical machine 12, and the number of samplings before and after the change. That is, by changing the number of times of sampling, the current waveform 66 restored based on the current value detected by sampling may be on the large current side compared to the true current waveform 64. For example, contrary to the case described with reference to FIG. 2, at time t ₀ , switching from the overmodulation control mode to the rectangular wave modulation mode is performed, and the sampling count is changed from N = 36 to N = 12. Think about it. In this case, after time t ₀ , the current waveform restored based on the current value detected by sampling may be on the large current side compared to the true current waveform.

  Referring to FIG. 2, the current waveform 66 restored based on the current value detected by sampling is on the large current side compared to the true current waveform 64. Therefore, the detected current value 68 after the change in the number of samplings is larger than the current command value 60, and the current deviation 70 is a positive value. In this case, control is performed so that the detected current value 68 approaches the current command value 60, and the current supply to the rotating electrical machine 12 is rapidly reduced. This causes an unexpected output shortage.

  In such a case, the current deviation between the detected current value 68 and the current command value 60 can be set to 0 by adding the current deviation 70 to the current command value 60 to obtain a new current command value. Therefore, the correction value of the current command value 60 necessary for compensating the current deviation 70 is obtained by adding a plus sign to the absolute value of the current deviation 70.

  In this case, the description will be given with reference to the reference numeral in FIG. 4. The current waveform 78 after changing the number of times of sampling is obtained by adding the plus sign to the absolute value of the current deviation 70 as the correction value 74 of the current command value 60. And a new current command value 72 can be prevented from causing a current deviation.

  As described above, by correcting the current command value, good control can be performed even when the number of samplings is changed.

  The rotating electrical machine control device according to the present invention can be used for controlling a rotating electrical machine mounted on a vehicle.

  DESCRIPTION OF SYMBOLS 10 Rotating electrical machine control system, 12 Rotating electrical machine, 14 Drive circuit part, 16 Power storage device, 18, 22 Smoothing capacitor, 20 Voltage converter, 24 Inverter, 30 Current sampling part, 32 Resolver, 38 Torque command value, 40 Rotating electrical machine control Device, 42 sine wave PWM control unit, 44 overmodulation control unit, 46 rectangular wave control unit, 48 control mode switching unit, 50 sampling number setting unit, 52 current command value correction unit, 54 storage device, 56 correction value table, 60 , 72 Current command value, 62, 64, 66, 76, 78 Current waveform, 68 Detected current value, 70 Current deviation, 74 Correction value.

Claims (3)

A current sampling unit that samples the current of the rotating electrical machine at a preset number of times of sampling for one electrical cycle of the rotating electrical machine;
A sampling number setting unit for changing and setting the number of samplings according to the operating status of the rotating electrical machine,
In determining the value of the current flowing from the restored current waveform based on the detected value of the plurality of current sampling to the rotary electric machine, rotary electric machine based on the fact that the appearance of the restored current waveform changes by changing the sampling number A current command value correction unit that performs correction of the current command value that compensates for the detected current deviation that appears to change the current value flowing in the
A rotating electrical machine control device comprising: In the rotating electrical machine control device according to claim 1,
A rotating electrical machine control device comprising: a storage unit that obtains and stores in advance a relationship between a correction value for a current command value and the number of samplings. In the rotary electric machine control device according to claim 1 or 2,
The sampling number setting section
Change the number of samplings when the control mode of the rotating electrical machine is switched from the rectangular wave control mode to the overmodulation control mode or when switching from the overmodulation control mode to the rectangular wave control mode. A rotating electrical machine control device.

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