JP2018170912A - Control device for rotary electric machine and control method of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for a rotary electric machine capable of obtaining command values of an exciting current Id and a torque current Iq that maximize driving efficiency in accordance with a change in magnetic flux density.SOLUTION: The control device for a rotary electric machine includes: a rotor; a rotary electric machine having a stator; and a drive control device that controls an excitation (d-axis) current and a torque (q-axis) current supplied to winding of the stator. The drive control device acquires a magnet temperature, which is a temperature of a permanent magnet, or a temperature parameter that is correlated with the magnet temperature and sets an excitation current command value and a torque current command value in accordance with the acquired magnet temperature or the temperature parameter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine control device and a rotating electrical machine control method.

  Patent Document 1 discloses a configuration in which the phase of a current supplied to a rotating electrical machine is changed according to the magnitude of demagnetization of the permanent magnet when the rotating electrical machine is controlled. Generally, in this type of control of a rotating electrical machine, a rotating electrical machine is used by using a dq-axis current command map in which an excitation current Id and a torque current Iq are determined in advance based on a torque command and a rotational speed so that driving efficiency is maximized. Indicated values of the excitation current Id and the torque current Iq. However, the permanent magnet used in the rotating electrical machine changes the magnetic flux density as the temperature of its magnet changes.

  However, in the dq-axis current command map, changes in the magnetic flux density of the permanent magnet due to changes in the magnet temperature are not taken into account. For this reason, when the magnet temperature changes during driving of the rotating electrical machine, it is not possible to obtain the optimum values of the excitation current Id and the torque current Iq that maximize the drive efficiency in a state corresponding to the change of the magnetic flux density. There is a concern that the drive efficiency of the electric machine may be reduced.

Japanese Patent No. 2943657

  The present invention provides a control device for a rotating electrical machine and a control method for the rotating electrical machine that can determine the indicated values of the excitation current Id and the torque current Iq that maximize the drive efficiency in a state corresponding to a change in magnetic flux density. Objective.

  According to the first aspect of the present invention, a rotating electrical machine (IPM1 of the embodiment) having a rotor (the rotor 11 of the embodiment) and a stator (the stator 12 of the embodiment), and the windings of the stator are supplied. And a drive control device (motor control device 2 of the embodiment) for controlling excitation (d-axis) current and torque (q-axis) current to be performed (of the rotary electric machine control system 100 of the embodiment). The drive control device acquires a magnet temperature that is a temperature of a permanent magnet or a temperature parameter that correlates to the magnet temperature, and an excitation current command value and a torque that correspond to the acquired magnet temperature or the temperature parameter. A current command value is set.

  Invention of Claim 2 is the control apparatus of the rotary electric machine of Claim 1, Comprising: While the said drive control apparatus acquires the said magnet temperature or the said temperature parameter, the said drive control apparatus is a field magnet The field correction current is configured to calculate a field correction current that weakens the field magnetic flux of the permanent magnet in the weakening region. When the rotating electrical machine is operated in the field weakening region, the field correction current is zero. In this case, a correction value is added to the magnet temperature, and the excitation current command value and the torque current command value are set based on the magnet temperature to which the correction value is added.

  A third aspect of the present invention is the rotating electrical machine control device according to the first or second aspect, wherein the field correction current is reduced when the drive control device is operated in the field weakening region. The correction value is repeatedly added to the magnet temperature until it exceeds 0, and the magnet temperature of the permanent magnet when the field correction current exceeds 0 is set as the corrected magnet temperature of the permanent magnet. It is characterized by that.

  According to a fourth aspect of the present invention, there is provided a rotary electric machine that performs drive control of a rotary electric machine having a rotor and a stator by controlling an excitation current and a torque current supplied to a winding of the stator by a drive control device. And a temperature parameter correlated with the magnet temperature, which is a temperature of a permanent magnet, is acquired by the drive control device, and excitation is performed according to the acquired magnet temperature or the temperature parameter. A current command value and a torque current command value are set.

  According to the first and fourth aspects of the present invention, since the excitation current and the torque current are obtained in response to fluctuations in the magnet temperature of the permanent magnet in the rotating electrical machine, the rotating electrical machine can be used in a state corresponding to the change in magnetic flux density. It is possible to obtain optimum command values for the excitation current Id and the torque current Iq that maximize the drive efficiency.

  According to the second aspect of the present invention, when the field correction current is zero in the field weakening region, the torque of the rotating electrical machine may be reduced. Therefore, the magnet temperature is set so that the field correction current does not become zero. Since the excitation current Id and the torque current Iq are obtained by correction, a decrease in torque can be reduced in the field weakening region.

  According to the third aspect of the present invention, when the field correction current is 0 in the field weakening region, when correcting the magnet temperature, the correction value is repeatedly added to the magnet temperature. When the temperature exceeds 0, the correction of the magnet temperature can be stopped, and an extra increase in the magnet temperature can suppress a decrease in torque without reducing the efficiency of the drive control of the rotating electrical machine. .

It is a block diagram which shows the structural example of the rotary electric machine control system 100 which concerns on one Embodiment of this invention. FIG. 2 is a schematic diagram for explaining a configuration example of a magnet temperature high temperature dq axis current command map 211 and a magnet temperature low temperature dq axis current command map 212 shown in FIG. 1. 4 is a flowchart showing an example of dq axis current calculation processing in the motor control device 2. 6 is a flowchart showing another example of dq-axis current calculation processing in the motor control device 2. It is a flowchart which shows the magnet temperature correction process (S108) shown in FIG. 6 is a flowchart showing another example of dq-axis current calculation processing in the motor control device 2. It is a figure which shows an example of the output characteristic in a rotary electric machine.

Embodiments of a rotating electrical machine control device and a rotating electrical machine control method according to the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration example of a rotating electrical machine control system 100 according to an embodiment of the present invention. A rotating electrical machine control system 100 shown in FIG. 1 includes an IPM (Interior Permanent Magnet Motor) 1 (hereinafter referred to as a motor 1) and a motor control device 2 that controls current of the motor 1.
In the present embodiment, the motor 1 is a power source of a vehicle such as a series hybrid type vehicle or an electric vehicle, for example, and the output torque of the motor 1 is transmitted to a drive wheel of the vehicle via a power transmission device such as a transmission (not shown). introduce.

Here, the motor 1 is a rotary electric machine, for example, an inner rotor type embedded magnet synchronous motor, and a cylindrical stator 12 and a cylindrical rotor disposed at a predetermined interval inside the stator 12. 11. The rotor 11 has a plurality of permanent magnets inserted into the rotor core.
Since the magnet torque is generated by the magnetic flux of the permanent magnet in the rotor 11 and the torque current flowing through the winding of the stator 12, the magnet temperature of the permanent magnet increases, the magnetic flux decreases, and the magnet torque decreases. On the other hand, when the magnet temperature of the permanent magnet decreases, the magnetic flux increases and the magnet torque increases. Therefore, in order to achieve the command torque with maximum efficiency by changing the magnet temperature, in order to suppress the influence due to the change in the ratio between the magnet torque and the reluctance torque, excitation is performed according to the magnet temperature in the permanent magnet. It is necessary to obtain the current Id and the torque current Iq.

  The motor control device 2 includes a current command generator 21, a current controller 22, an inverter 23, a field controller 24, and a magnet temperature corrector 25. The motor control device 2 controls the operation of the motor 1 by vector control using the excitation current Id and the torque current Iq in the dq coordinate system.

  The current command generator 21 is a torque command D1 that is a command value (target value) of torque to be generated by the motor 1, an inverter primary side input voltage D2 that is a primary side input voltage of the inverter 23, and a motor rotation speed of the motor 1. Depending on D3 and the magnet temperature D4 of the permanent magnet of the rotor 11, an Id (d-axis current) instruction value and an Iq (q-axis current) instruction value are output. Here, the Id instruction value and the Iq instruction value are a d-axis component and a q-axis component of a command value of a current (stator current) that flows through the stator 12 of the motor 1, respectively. The Id instruction value and the Iq instruction value are collectively referred to as a dq axis current command value.

  Here, the torque command D1 input to the current command generator 21 is set according to the driving state (accelerator operation amount, etc.) of the vehicle by an arithmetic processing unit (not shown). Each of the inverter primary side input voltage D2, the motor rotation speed D3 and the magnet temperature D4 is detected by a sensor as an ECU (electronic control unit) not shown in the figure as its own measured value or other parameters correlated with each other. And is supplied to the current command generator 21. Alternatively, a predetermined parameter may be input to the current command generator 21, and a value such as the magnet temperature D4 may be estimated based on the parameter input by the current command generator 21. The motor rotation speed D3 is calculated based on the position information of the rotor 11 detected by using a hall sensor or a rotary encoder (not shown) provided in the motor 1, or rotated in synchronization with the motor 1, for example. Or calculated based on the detection result of the rotational position of the predetermined rotating shaft. Further, the magnet temperature D4 is estimated based on, for example, the detection result of the temperature around the rotor 11 such as the temperature of the winding of the stator 12, or the detected temperature of the refrigerant and the stator 12 with which the rotor 11 performs heat exchange. Can be estimated on the basis of a thermal model using the detected temperature of the windings, or can be detected using an infrared temperature sensor or the like.

  The current command generator 21 includes a dq-axis current command map for obtaining an Id command value and an Iq command value corresponding to the torque command D1, the inverter primary side input voltage D2, the motor rotation speed D3, and the magnet temperature D4. Yes. In the present embodiment, for example, a magnet temperature high temperature dq axis current command map 211 and a magnet temperature low temperature dq axis current command map 212 are provided as the dq axis current command map. Here, each of the magnet temperature high temperature and the magnet temperature low temperature divides the temperature range that can be taken by the fluctuation of the magnet temperature of the permanent magnet of the rotor 11 by a predetermined voltage, and sets the temperature in the voltage range above the predetermined voltage. On the other hand, the temperature in the voltage range lower than the predetermined voltage is the magnet temperature low temperature. Next, a configuration example of the magnet temperature high temperature dq axis current command map 211 and the magnet temperature low temperature dq axis current command map 212 will be described with reference to FIG.

  FIG. 2 is a diagram schematically showing an example of the correspondence relationship between the Id instruction value and the Iq instruction value set in the magnet temperature high temperature dq axis current command map 211 and the magnet temperature low temperature dq axis current command map 212. The horizontal axis represents the Id instruction value, and the vertical axis represents the Iq instruction value. Each of the curves 2111, 2112, 2121 and 2122 indicates the correspondence between the Id instruction value and the Iq instruction value when the torque command D1 is changed with the inverter primary side input voltage D2, the motor rotation speed D3 and the magnet temperature D4 being constant. Indicates. A solid curve 2111 and a solid curve 2112 are examples of values set in the magnet temperature high temperature dq-axis current command map 211. That is, the solid curve 2111 and the curve 2112 correspond to the characteristics when the magnet temperature D4 is relatively high. A dashed curve 2121 and a dashed curve 2122 are examples of values set in the magnet temperature low temperature dq axis current command map 212. That is, the dashed curve 2121 and curve 2122 correspond to the characteristics when the magnet temperature D4 is relatively low. Curves 2111 and 2121 correspond to characteristics when the value of (inverter primary side input voltage D2 / motor rotational speed D3) is relatively large. Curve 2112 and curve 2122 correspond to characteristics when the value of (inverter primary side input voltage D2 / motor rotational speed D3) is relatively small. Curves 2111 and 2121 correspond to characteristics used in the orthogonal control region in which the negative Id instruction value is relatively small. Curve 2112 and curve 2122 correspond to the characteristics used in the field weakening control region (also simply referred to as field weakening region) where the negative Id indication value is relatively large.

  As shown in FIG. 7, the orthogonal control region is a region where the motor rotational speed is relatively small and the back electromotive voltage of the motor 1 is relatively low, and the Id instruction value is controlled to be relatively small, and the Iq instruction value is This is a region where control is performed to obtain a large torque by making it relatively large. On the other hand, in the field weakening control area shown by shading, the negative Id instruction value is controlled to be relatively large when the back electromotive voltage of the motor 1 increases in the high speed range and exceeds the inverter primary side voltage. By doing this, it is a region where control for suppressing the back electromotive force is performed. FIG. 7 is a diagram schematically showing output torque characteristics of the motor 1 with the horizontal axis as the rotation speed of the motor 1 and the torque of the motor 1 as the vertical axis. A case where the torque is positive is a characteristic when the motor 1 operates as an electric motor, and a characteristic when the motor 1 operates as a generator when the torque is negative.

Note that the current command generator 21 may divide the temperature range that the magnet temperature of the permanent magnet can take by fluctuation into a plurality of regions, and generate a dq-axis current command map corresponding to each region.
The current command generator 21 selects one of the magnet temperature high temperature dq axis current command map 211 or the magnet temperature low temperature dq axis current command map 212 according to the magnet temperature D4, and outputs a torque command D1, an inverter primary side input voltage D2, and The Id instruction value and the Iq instruction value based on each of the motor rotation speeds D3 are output to the current controller 22.

  The current controller 22 adds the field correction current ΔId and the field correction current ΔIq supplied from the field controller 24 to the Id instruction value and the Iq instruction value, respectively. The current controller 22 has the Id axis and the Iq axis in the inverter 23 in accordance with the addition current of the Id instruction value and the field correction current ΔId and the addition current of the Iq instruction value and the field correction current ΔIq, respectively. A Vd instruction value and a Vq instruction value, which are command values of the applied voltage in the axial direction, are obtained. The current controller 22 inputs, for example, signals indicating Id current and Iq current corresponding to the three-phase currents iu, iv and iw that actually flow through the winding of the stator 12 of the motor 1 output from the inverter 23, and the Id current In addition, the Vd instruction value and the Vq instruction value can be obtained by, for example, PI control (feedback control such as proportional / integral control) so that the deviation between the Iq current, the Id instruction value, and the Iq instruction value becomes small.

  The inverter 23 is based on a signal (rotation position D5) indicating the rotation position of the rotor 11 of the motor 1 input from the outside, and each of the Vd instruction value and the Vq instruction value supplied from the current controller 22. A three-phase AC voltage to be applied to the windings of the stator 12 is generated, and three-phase currents iu, iv and iw are supplied to the windings of the stator 12 of the motor 1. Further, the inverter 23 calculates Id current and Iq current corresponding to the three-phase currents iu, iv and iw, and outputs signals indicating the calculated Id current and Iq current.

  The field controller 24 determines the Id instruction so that the Vd instruction value and the Vq instruction value do not exceed the output possible voltage of the inverter 23 based on the inverter primary side input voltage D2 and the Vd instruction value and Vq instruction value output from the current controller 22. The field correction current ΔId and the field correction current ΔIq, which are correction values for correcting the value and the Iq instruction value, are calculated and output.

  The magnet temperature corrector 25 determines whether or not the magnet temperature D4 needs to be corrected according to the value of the field correction current output from the field controller 24. If the magnet temperature corrector 25 determines that the correction is necessary, the magnet temperature corrector 25 is input. A predetermined correction value (corrected magnet temperature) is added to the magnet temperature D4 and input to the current command generator 21. The determination of the necessity for correction by the magnet temperature corrector 25 will be described later with reference to FIG. The temperature correction by the magnet temperature corrector 25 may be omitted.

  Next, referring to FIG. 3, the process until the motor control device 2 shown in FIG. 1 determines the Id instruction value and the Iq instruction value and adds the field correction current ΔId and the field correction current ΔIq to them. The flow will be described. The process shown in FIG. 3 is repeatedly executed at a predetermined time interval, for example. When the process is started, first, the current command generator 21 acquires the torque command D1, the inverter primary side voltage D2, and the motor rotation speed D3 (step S101). Next, the current command generator 21 acquires the magnet temperature D4 and determines whether or not the acquired magnet temperature D4 is a high temperature (step S102). For example, when the magnet temperature D4 is greater than a predetermined threshold (Yes in Step S102), the current command generator 21 selects the magnet temperature high temperature dq-axis current command map 211 (Step S103). Next, the current command generator 21 obtains the Id instruction value corresponding to the torque command D1, the inverter primary side voltage D2, and the motor rotational speed D3 acquired in Step S101 from the selected magnet temperature high temperature dq axis current command map 211. The Iq instruction value (dq axis current command value) is extracted and output.

  On the other hand, when the magnet temperature D4 is not greater than the predetermined threshold value (No in step S102), the current command generator 21 selects the magnet temperature low temperature dq-axis current command map 212 (step S105). Next, the current command generator 21 obtains the Id instruction value corresponding to the torque command D1, the inverter primary side voltage D2, and the motor rotational speed D3 acquired in Step S101 from the selected magnet temperature / low temperature dq axis current command map 212. The Iq instruction value (dq axis current command value) is extracted and output.

  Next, the current controller 22 adds the field correction current ΔId and the field correction current ΔIq output from the field controller 24 to the Id instruction value and Iq instruction value output by the current command generator 21 in step S104 or step S106. Each is added (step S107). Thus, the process illustrated in FIG. 3 ends.

  Next, with reference to FIG. 4, the flow of the process when a magnet temperature correction process is added to the process shown in FIG. 3 will be described. In FIG. 4, the same steps as those in FIG. 3 are denoted by the same reference numerals and description thereof is omitted. In the process shown in FIG. 4, steps S101 to S107 are the same as the processes shown in FIG. In the process shown in FIG. 4, the process of step S108 is newly provided. FIG. 5 shows the flow of the magnet temperature correction process called up in step S108 shown in FIG.

  In the magnet temperature correction process shown in FIG. 5, first, the magnet temperature corrector 25 determines whether or not it is a field weakening region (step S201). When it is a field weakening region (Yes in step S201), the magnet temperature corrector 25 determines whether or not the field correction current is “0” (zero) (step S202). When the field correction current is “0” (Yes in step S202), the magnet temperature corrector 25 determines whether or not the magnet temperature low-temperature dq-axis current command map 212 is selected by the current command generator 21. Determination is made (step S203). When the magnet temperature low temperature dq axis current command map 212 is selected by the current command generator 21 (Yes in step S203), the magnet temperature corrector 25 sets a predetermined correction value (corrected magnet temperature) to the magnet temperature D4. Are added (step S204). Next, after the current command generator 21 outputs the dq axis current command from the dq axis current command map corresponding to the corrected magnet temperature (after step S205), the magnet temperature corrector 25 again performs field correction. It is determined whether or not the current is “0” (step S206). When the field correction current is “0” (Yes in step S206), the magnet temperature corrector 25 adds a predetermined correction value (corrected magnet temperature) to the magnet temperature D4 again (step S204).

  On the other hand, if it is not a field weakening region (that is, an orthogonal region) (No in step S201), if the field correction current is not “0” (No in step S202 or No in step S206), Alternatively, when the magnet temperature low temperature dq-axis current command map 212 is not selected by the current command generator 21 (No in step S203), the magnet temperature corrector 25 performs the processing shown in FIG. 5 without performing magnet temperature correction. Exit.

  As described above, when the field correction current is “0”, the magnet temperature corrector 25 repeatedly adds a predetermined correction value to the magnet temperature. Note that the determination process of step S203 may be replaced with a process of determining whether or not the map with the highest temperature is selected.

  Next, referring to FIG. 6, when the temperature command generator 21 includes a dq axis current command map for every three or more temperature regions, the motor control device 2 determines the Id command value and the Iq command value, The flow of processing until the field correction current ΔId and the field correction current ΔIq are added to them will be described. The process shown in FIG. 6 is repeatedly executed every predetermined time. When the process is started, first, the current command generator 21 acquires a torque command D1, an inverter primary side voltage D2, and a motor rotation speed D3 (step S301). Next, the current command generator 21 acquires or estimates the magnet temperature D4 (step S302). Next, the current command generator 21 selects a dq-axis current command map corresponding to the estimated magnet temperature (step S303). Next, the current command generator 21 generates an Id command value and an Iq command value (Iq command value (corresponding to the torque command D1, the inverter primary voltage D2, and the motor rotation speed D3) acquired in step S301 from the selected dq axis current command map. dq-axis current command value) is extracted and output (step S304). Next, the current controller 22 adds the field correction current ΔId and the field correction current ΔIq output from the field controller 24 to the Id instruction value and the Iq instruction value output from the current command generator 21 in step S304, respectively. (Step S305). Next, the magnet temperature corrector 25 executes the process shown in FIG. 5 (step S306). Thus, the process illustrated in FIG. 6 ends.

  In the above process, a plurality of dq-axis current command maps corresponding to the estimated magnet temperature are selected, an interpolation value is calculated from the plurality of dq-axis current command maps, and these are calculated as an Id instruction value and an Iq instruction value. It is good.

  In the present embodiment, in the field weakening region, when the Vd instruction value and the Vq instruction value based on the Id instruction value and the Iq instruction value cannot exceed the counter electromotive voltage, the field magnet that weakens the field magnetic flux of the permanent magnet. The correction current is calculated by the field controller 24. That is, in the present embodiment, in the dq-axis current command map, the magnitude of the positive Iq instruction value is made as large as possible and the magnitude of the negative Id instruction value is made as small as possible so that the torque is maximized and the efficiency is maximized. Thus, a combination of the Id instruction value and the Iq instruction value is set. That is, the Vd instruction value and the Vq instruction value based on the Id instruction value and the Iq instruction value are almost set as long as the counter electromotive voltage is not exceeded or exceeded. Then, the portion that cannot exceed the back electromotive voltage is corrected by the field correction current calculated by the field controller 24. Therefore, when the motor 1 is operated in the field weakening region and the field correction current becomes 0, the Vd instruction value and the Vq instruction value have a certain margin with respect to the counter electromotive voltage. It is thought that it is in a state. One of the causes of this state is a change in magnet temperature. Therefore, in the present embodiment, when the field correction current becomes 0 when the motor 1 is operated in the field weakening region, the correction value is added to the magnet temperature, and the correction value is added to the magnet temperature. Based on this, the Id instruction value and the Iq instruction value (excitation current command value and the torque current command value) are set. Thereby, according to this embodiment, a larger torque can be obtained with higher efficiency. At this time, in the present embodiment, when operating in the field weakening region, the correction value is repeatedly added to the magnet temperature until the field correction current exceeds 0, and the field correction current is 0. The magnet temperature of the permanent magnet at the time when the temperature exceeds is set as the corrected magnet temperature of the permanent magnet.

  As described above, in this embodiment, the Id instruction value and the Iq instruction are selected by selecting one of the high-temperature and low-temperature dq-axis current command maps or by interpolating using a plurality of dq-axis current command maps. Value is set. Therefore, according to the present embodiment, it is possible to obtain the excitation current Id and torque current Iq command values (Id command value and Iq command value) that maximize the driving efficiency in a state corresponding to the change in magnetic flux density. Depending on the magnet temperature, the ratio of magnet torque and reluctance torque for achieving the same torque with maximum efficiency changes. For this reason, in order to achieve the same torque with maximum efficiency, it is necessary to manipulate the magnitudes of the Id instruction value and the Iq instruction value according to the magnet temperature. In this embodiment, a plurality of dq axis currents according to the temperature are required. A command map is available. As a result, the motor can be operated more efficiently. Therefore, the toughness with respect to the heat of the motor is improved, and the operating range of the motor can be expanded. In addition, the fuel efficiency of the mounted car will be improved.

  In the present embodiment, since the dq-axis current command map data is set using the torque command, the inverter primary side voltage, the motor rotation speed, and the magnet temperature as parameters, the orthogonal region and the field weakening region can be checked. First, an optimum dq axis current command map can be selected according to the magnet temperature.

  Further, a program for realizing the function of the motor control device 2 shown in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by a computer system and executed to execute rotation. You may perform the process of drive control of an electric machine. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within a scope not departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Rotary electric machine control system (control apparatus of a rotary electric machine), 1 ... IPM (motor; rotating electric machine), 2 ... Motor control apparatus, 21 ... Current command generator, 211 ... Magnet temperature high temperature dq axis current command map, 212 ... Magnet temperature low temperature dq axis current command map, 22 ... current controller, 23 ... inverter, 24 ... magnet temperature corrector, 25 ... field controller

Claims (4)

A rotating electrical machine having a rotor and a stator;
A drive control device for controlling excitation (d-axis) current and torque (q-axis) current supplied to the windings of the stator;
In a control device for a rotating electrical machine comprising:
The drive control device includes:
Obtaining a magnet temperature that is the temperature of a permanent magnet or a temperature parameter correlated to the magnet temperature;
An exciting current command value and a torque current command value are set according to the acquired magnet temperature or the temperature parameter. The drive control device acquires the magnet temperature or the temperature parameter before,
The drive control device is configured to calculate a field correction current for weakening the field magnetic flux of the permanent magnet in the field weakening region,
When the rotating electrical machine is operated in the field weakening region, when the field correction current becomes 0,
The rotation according to claim 1, wherein a correction value is added to the magnet temperature, and the excitation current command value and the torque current command value are set based on the magnet temperature to which the correction value is added. Electric control device. The drive control device includes:
When operating in the field weakening region, repeatedly adding the correction value to the magnet temperature until the field correction current exceeds 0,
The controller for a rotating electrical machine according to claim 1 or 2, wherein a magnet temperature of the permanent magnet at a time when the field correction current exceeds 0 is set as a magnet temperature of the permanent magnet after correction. . In a control method for a rotating electrical machine that performs drive control of a rotating electrical machine having a rotor and a stator by controlling an excitation current and torque current supplied to a winding of the stator by a drive control device,
By drive control device,
Obtaining a magnet temperature that is the temperature of a permanent magnet or a temperature parameter correlated to the magnet temperature;
An excitation current command value and a torque current command value are set in accordance with the acquired magnet temperature or the temperature parameter. A method for controlling a rotating electrical machine.

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