JP5708447B2 - Drive device - Google Patents

Description

  The present invention relates to a drive device, and more particularly, a motor, a battery, and a boost converter capable of boosting the power of a battery voltage system having a reactor and connected to the battery and supplying the boosted power to the drive voltage system connected to the motor. The present invention relates to a drive device including a drive voltage system capacitor attached to the drive voltage system and a battery voltage system capacitor attached to the battery voltage system.

  Conventionally, in digital position control of the motors MG1 and MG2 using encoder output pulses as position detection signals, the reciprocal of the time interval of encoder output pulses in the low speed range, and the number of encoder output pulses per unit time in the high speed range. A technique has been proposed in which the cut frequency is changed in accordance with the speed of the motor in the variable low-pass filter corresponding to the speed and used as a speed (see, for example, Patent Document 1). In this technique, the quantization noise in the high speed region is reduced without losing the accuracy of speed detection in the low speed region by the time interval method.

Japanese Patent Laid-Open No. 5-233672

  Motor, battery, boost converter that has a reactor and boosts battery-side power and can supply it to the motor side, two capacitors attached to the motor side and battery side from the boost converter, and battery input / output If the above-described technique is applied to a drive device that includes a current sensor that detects current, for example, the detection value of the current sensor can be obtained by performing low-pass filter processing that attenuates a frequency component having a frequency greater than the cutoff frequency. It is conceivable to use the filtered current for controlling the motor. In this case, if a relatively small value is used for the cut-off frequency of the low-pass filter, when the input / output current of the battery changes, the followability of the filtered current to the change may be low, leading to a decrease in motor controllability. If a relatively large value is used for the cut-off frequency of the low-pass filter, the fluctuation of the filtered current will be relatively large when the motor rotation speed is within the resonance rotation speed region of the circuit including the boost converter. It is thought that the case where it appears in the behavior of a vehicle arises.

  The drive device of the present invention is mainly intended to increase the controllability of the motor and to make the behavior of the vehicle more appropriate.

  The drive device of the present invention employs the following means in order to achieve the main object described above.

The drive device of the present invention is
A motor, a battery, a booster converter that has a reactor and boosts the power of a battery voltage system to which the battery is connected and can be supplied to the drive voltage system to which the motor is connected, and is attached to the drive voltage system A drive voltage system capacitor, a battery voltage system capacitor attached to the battery voltage system, a current sensor for detecting a battery current input / output from the battery, and a low-pass filter for attenuating a frequency component having a frequency greater than a cutoff frequency The torque command of the motor is set in consideration of the filtered current obtained by applying the process to the battery current detected by the current sensor, and the motor is controlled so that the motor is driven by the set torque command. A drive unit comprising a control means,
The control means cuts off a smaller frequency when the rotation speed of the motor is within the resonance rotation speed region of the circuit including the boost converter than when the rotation speed of the motor is outside the resonance rotation speed region. A means of frequency,
This is the gist.

  In this drive device of the present invention, the motor torque command is set in consideration of the filtered current obtained by applying low-pass filter processing for attenuating a frequency component having a frequency greater than the cutoff frequency to the battery current detected by the current sensor. In addition, when the motor is controlled so that the motor is driven by the set torque command, when the motor rotation speed is within the resonance rotation speed region of the circuit including the boost converter, the motor rotation speed is outside the resonance rotation speed region. A frequency that is smaller than the cut-off frequency is used. As a result, when the rotational speed of the motor is outside the resonance rotational speed range, the followability of the filtered current with respect to the value detected by the current sensor can be increased to increase the controllability of the motor, and the rotational speed of the motor can be When within a few regions, it is possible to suppress the pulsation (ripple component) of the filtered current from increasing and the influence of the pulsation appearing in the behavior of the vehicle.

  In such a driving apparatus of the present invention, the control means is configured such that when the rotation speed of the motor is within the resonance rotation speed range and the temperature of the battery is higher than a predetermined temperature, the temperature of the battery is It can also be a means for setting the cut-off frequency to a smaller frequency than when the temperature is lower than a predetermined temperature. This is based on the reason that when the temperature of the battery is high, the internal resistance of the battery decreases and the ripple component of the battery current tends to increase.

  Further, in the driving device according to the present invention, the control unit sets an input / output limit of the battery according to a storage ratio of the battery and a temperature of the battery calculated using the filtered current, and the setting It is also possible to set the motor torque command within a range of torque limitation obtained by dividing the input / output limitation by the rotation speed of the motor.

It is a block diagram which shows the outline of a structure of the electric vehicle 20 carrying the drive device as one Example of this invention. 2 is a configuration diagram showing an outline of a configuration of an electric drive system including a motor 32. FIG. It is explanatory drawing which shows an example of the mode of the time change of the charging / discharging electric current Ib of the battery 36, and the filtered electric current FIb. It is a flowchart which shows an example of the cutoff frequency setting routine performed by the electronic control unit 50 of an Example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 320 of a modified example.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of an electric vehicle 20 equipped with a drive device as an embodiment of the present invention, and FIG. 2 is a configuration diagram showing an outline of the configuration of an electric drive system including a motor 32. It is. As shown in FIG. 1, the electric vehicle 20 according to the embodiment drives a motor 32 that can input and output power to a drive shaft 22 connected to drive wheels 26 a and 26 b via a differential gear 24, and a motor 32. Inverter 34, a battery 36 configured as, for example, a lithium ion secondary battery, a power line (hereinafter referred to as a drive voltage system power line) 42 to which the inverter 34 is connected, and a power line (hereinafter referred to as a drive voltage system power line) 42. A boost converter that adjusts the voltage VH of the drive voltage system power line 42 and exchanges power between the drive voltage system power line 42 and the battery voltage system power line 44. 40 and an electronic control unit 50 for controlling the entire vehicle.

  The motor 32 is configured as a well-known synchronous generator motor including a rotor embedded with permanent magnets and a stator wound with a three-phase coil. As shown in FIG. 2, the inverter 34 includes transistors T11 to T16 as six switching elements, and six diodes D11 to D16 connected in parallel to the transistors T11 to T16 in the reverse direction. The transistors T11 to T16 are arranged in pairs so as to be on the source side and the sink side with respect to the positive and negative buses of the drive voltage system power line 42, and each of the connection points between the paired transistors. The three-phase coils (U-phase, V-phase, W-phase) of the motor 32 are connected to each other. Therefore, a rotating magnetic field can be formed in the three-phase coil and the motor 32 can be driven to rotate by adjusting the ratio of the on-time of the transistors T11 to T16 while the voltage is applied to the inverter 34. A smoothing capacitor 46 is connected to the positive and negative buses of the drive voltage system power line 42.

  As shown in FIG. 2, the boost converter 40 is configured as a boost converter including two transistors T31 and T32, two diodes D31 and D32 connected in parallel in opposite directions to the transistors T31 and T32, and a reactor L. . The two transistors T31 and T32 are respectively connected to the positive bus of the drive voltage system power line 42, the negative bus of the drive voltage system power line 42 and the battery voltage system power line 44, and the connection point between the transistors T31 and T32. A reactor L is connected to the positive electrode bus of the battery voltage system power line 44. Therefore, by turning on and off the transistors T31 and T32, the power of the battery voltage system power line 44 is boosted and supplied to the drive voltage system power line 42, or the power of the drive voltage system power line 42 is lowered to reduce the battery voltage system. Or can be supplied to the power line 44. A smoothing capacitor 48 is connected to the positive and negative buses of the battery voltage system power line 44.

  The electronic control unit 50 is configured as a microprocessor centered on the CPU 52, and includes a ROM 54 that stores a processing program, a RAM 56 that temporarily stores data, and an input / output port (not shown) in addition to the CPU 52. . The electronic control unit 50 includes a rotational position for detecting the rotational speeds Nwl and Nwr of the drive wheels 26a and 26b from the rotational speed sensors 28a and 28b for detecting the rotational speeds of the drive wheels 26a and 26b, and the rotational position of the rotor of the motor 32. The rotational position θm of the rotor of the motor 32 from the detection sensor 32a, the phase currents Iu and Iv from the current sensors 33U and 33V for detecting the phase currents flowing in the V-phase and W-phase of the three-phase coil of the motor 32, the battery 36 A voltage Vb between terminals from a voltage sensor 37a attached between terminals, a charge / discharge current Ib from a current sensor 37b attached to an output terminal of the battery 36, a battery temperature Tb from a temperature sensor 37c attached to the battery 36, The voltage of the capacitor 46 from the voltage sensor 46a attached between the terminals of the capacitor 46 (drive voltage system power line) 2) VH, the voltage of the capacitor 48 (voltage of the battery voltage system power line 44) VL from the voltage sensor 48a attached between the terminals of the capacitor 48, the ignition signal from the ignition switch 60, and the operating position of the shift lever 61. The shift position SP from the shift position sensor 62 that detects the depression, the accelerator opening Acc from the accelerator pedal position sensor 64 that detects the depression amount of the accelerator pedal 63, and the brake pedal position sensor 66 that detects the depression amount of the brake pedal 65 The brake pedal position BP, the vehicle speed V from the vehicle speed sensor 68, and the like are input via the input port. From the electronic control unit 50, switching control signals to the transistors T11 to T16 of the inverter 34, switching control signals to the transistors T31 and T32 of the boost converter 40, and the like are output via an output port. The electronic control unit 50 calculates the electrical angle θe, rotational angular velocity ωm, and rotational speed Nm of the rotor of the motor 32 based on the rotational position θm of the rotor of the motor 32 detected by the rotational position detection sensor 32a, Based on the charge / discharge current Ib of the battery 36 detected by the sensor 37b, the storage ratio SOC, which is the ratio of the amount of power that can be discharged from the battery 36 at that time to the total capacity, is calculated, or the calculated storage ratio SOC and the battery temperature Based on Tb, input / output limits Win and Wout, which are the maximum allowable power that may charge / discharge the battery 36, are calculated. In the embodiment, a low-pass filter (LPF) process for attenuating a frequency component having a frequency higher than the cut-off frequency Fc is applied to the charge / discharge current Ib of the battery 36 to calculate the filtered current FIb, and the calculated filtered current FIb is integrated. The storage ratio SOC of the battery 36 is calculated as a value corresponding to the value. FIG. 3 is an explanatory diagram illustrating an example of a temporal change in the charge / discharge current Ib of the battery 36 and the filtered current FIb. The input / output limits Win and Wout of the battery 36 are calculated based on the storage ratio SOC of the battery 36 and the battery temperature Tb thus obtained.

  In the thus configured electric vehicle 20 of the embodiment, the electronic control unit 50 sets the required torque Tr * to be output to the drive shaft 22 in accordance with the accelerator opening Acc and the vehicle speed V, and limits the input / output of the battery 36. By dividing Win and Wout by the rotational speed Nm of the motor 32, torque limits Tmin and Tmax are set as upper and lower limits of the torque that may be output from the motor 32, and the required torque Tr * is limited by the torque limits Tmin and Tmax. Then, a torque command Tm * as a torque to be output from the motor 32 is set, and the transistors T11 to T16 of the inverter 34 are subjected to switching control so that the motor 32 is driven by the set torque command Tm *. Further, the target voltage VHtag of the drive voltage system power line 42 is set according to the torque command Tm * of the motor 32 and the rotation speed Nm of the motor 32 so that the voltage VH of the drive voltage system power line 42 becomes the target voltage VHtag. The transistors T31 and T32 of the boost converter 40 are switching-controlled.

  Next, the operation of the electric vehicle 20 of the embodiment configured as described above, particularly the processing for setting the cutoff frequency Fc will be described. FIG. 4 is a flowchart illustrating an example of a cutoff frequency setting routine executed by the electronic control unit 50 of the embodiment. This routine is executed repeatedly.

  When the cut-off frequency setting routine is executed, the CPU 52 of the electronic control unit 50 first executes a process of inputting the rotation speed Nm of the motor 32 and the battery temperature Tb from the temperature sensor 37c (step S100). Here, the rotation speed Nm of the motor 32 is input based on the rotation position θm of the rotor of the motor 32 detected by the rotation position detection sensor 32a.

  When the data is input in this way, the input rotation speed Nm of the motor 32 is compared with the lower limit rotation speed N1 and the upper limit rotation speed N2 in the resonance rotation speed region that causes resonance in the circuit composed of the boost converter 40, the capacitor 46, and the capacitor 48. (Step S110). Here, the lower limit rotation speed N1 and the upper limit rotation speed N2 can be determined according to the inductance of the reactor L and the capacitance of the capacitor 46 and the capacitor 48. For example, 900 rpm, 1000 rpm, 1100 rpm, or the like can be used as the lower limit rotational speed N1, and 1900 rpm, 2000 rpm, 2100 rpm, or the like can be used as the upper limit rotational speed N2, for example. When the rotation speed Nm of the motor 32 is in the resonance rotation speed range, the ripple component (resonance gain) of the charge / discharge current Ib of the battery 36 is larger than when the rotation speed Nm of the motor 32 is outside the resonance rotation speed range. Cheap. The determination in step S110 is a process of determining whether or not the rotation state of the motor 32 is a rotation state in which the ripple component of the charge / discharge current Ib of the battery 36 is likely to increase.

  When the rotation speed Nm of the motor 32 is less than the lower limit rotation speed N1 or greater than the upper limit rotation speed N2, it is determined that the rotation speed Nm of the motor 32 is outside the resonance rotation speed region, and the predetermined frequency Fc1 is set to the cutoff frequency Fc. After setting (step S120), this routine is finished. Here, as the predetermined frequency Fc1, a relatively large frequency is used in order to increase the controllability of the motor 32. For example, 900 Hz, 1000 Hz, 1100 Hz, or the like can be used as the predetermined frequency Fc1.

  When the rotation speed Nm of the motor 32 is not less than the lower limit rotation speed N1 and not more than the upper limit rotation speed N2 in step S110, it is determined that the rotation speed Nm of the motor 32 is in the resonance rotation speed region, and the battery temperature Tb of the battery 36 is set as a threshold value. Compare with Tbref (step S130). When the battery temperature Tb of the battery 36 is high, the internal resistance of the battery 36 becomes smaller than when the battery temperature Tb of the battery 36 is low (in the normal temperature range), and the ripple component of the charge / discharge current Ib of the battery 36 ( Resonance gain) tends to increase. The threshold Tbref is used to determine whether or not the temperature state of the battery 36 is a temperature state in which the ripple component (resonance gain) of the charge / discharge current Ib of the battery 36 is likely to increase. Or 65 ° C. can be used.

  When the battery temperature Tb of the battery 36 is equal to or lower than the threshold value Tbref, the predetermined frequency Fc2 smaller than the predetermined frequency Fc1 is set as the cutoff frequency Fc (step S140), and this routine is terminated. When the frequency is higher, the predetermined frequency Fc3 smaller than the predetermined frequency Fc is set as the cutoff frequency Fc (step S150), and this routine is finished. Here, for example, 400 Hz, 500 Hz, and 600 Hz can be used as the predetermined frequency Fc2, and for example, 80 Hz, 100 Hz, and 120 Hz can be used as the predetermined frequency Fc3.

  The reason why the cut-off frequency Fc is set according to the rotational speed Nm of the motor 32 and the battery temperature Tb will be described with reference to FIG. First, in the embodiment, as described above, the charge / discharge current Ib of the battery 36 detected by the current sensor 37b is subjected to a low-pass filter process to calculate the filtered current FIb, and according to the integrated value of the filtered current FIb. The storage ratio SOC is calculated, the input / output limits Win and Wout of the battery 36 are set according to the storage ratio SOC and the battery temperature Tb, and the torque command Tm * is set in the range of the input / output limits Win and Wout of the battery 36. The motor 32 is set and controlled (switching of the inverter 34 is controlled).

  When a relatively large fixed value (for example, the predetermined frequency Fc1) is used as the cut-off frequency Fc in the low-pass filter process regardless of the rotational speed Nm of the motor 32 or the battery temperature Tb, the filtered current FIb is the charge of the battery 36. A relatively large frequency component remains (not attenuated) in the discharge current Ib. Therefore, the followability of the filtered current FIb with respect to the change in the charge / discharge current Ib of the battery 36 is increased, the followability of the input / output limits Win and Wout of the battery 36 is increased, and the controllability of the motor 32 is increased. However, when the pulsation (ripple component) of the charge / discharge current Ib of the battery 36 is large, the ripple component of the filtered current FIb is also likely to increase, and the input / output limits Win and Wout of the battery 36 fluctuate accordingly. It may appear in the behavior of the vehicle.

  On the other hand, when a relatively small fixed value (for example, the predetermined frequency Fc3) is used as the cut-off frequency Fc regardless of the rotation speed Nm of the motor 32 or the battery temperature Tb, the filtered current FIb is the charge / discharge current of the battery 36. Only a relatively small frequency component of Ib remains. For this reason, it is possible to suppress the ripple component of the filtered current FIb from increasing, and even when the ripple component of the charge / discharge current Ib of the battery 36 is large, it is possible to suppress the effect from appearing in the vehicle. There is a possibility that the followability of the post-filter current FIb with respect to the change in the charge / discharge current Ib is lowered, and the controllability of the motor 32 is lowered.

  In the embodiment, in consideration of these, when the rotational speed Nm of the motor 32 is outside the resonance rotational speed range, when the rotational speed Nm of the motor 32 is within the resonant rotational speed range and the battery temperature Tb of the battery 36 is equal to or less than the threshold value Tbref, The cut-off frequency Fc is decreased in the order in which the rotation speed Nm of the motor 32 is within the resonance rotation speed range and the battery temperature Tb of the battery 36 is higher than the threshold value Tbref, that is, the ripple component of the charge / discharge current Ib of the battery 36 increases. The cutoff frequency Fc was made smaller as it was easier. As a result, when the rotational speed Nm of the motor 32 is outside the resonance rotational speed range, that is, when the ripple component of the charging / discharging current Ib of the battery 36 is not so large, the filtered current FIb follows the charging / discharging current Ib of the battery 36. Therefore, the controllability of the motor 32 can be increased. Further, when the rotation speed Nm of the motor 32 is within the resonance rotation speed range and the battery temperature Tb of the battery 36 is higher than the threshold value Tbref, that is, when the ripple component of the charge / discharge current Ib of the battery 36 tends to increase, the filtered current FIb It is possible to suppress the ripple component from becoming large, and to prevent the influence from appearing in the behavior of the vehicle.

  According to the electric vehicle 20 of the embodiment described above, the filter obtained by applying the low-pass filter process for attenuating the frequency component having a frequency higher than the cutoff frequency Fc to the charge / discharge current Ib of the battery 36 detected by the current sensor 37b. In the case where the rear current FIb is used for control of the motor 32, when the rotational speed Nm of the motor 32 is outside the resonance rotational speed region (region of the lower limit rotational speed N1 to the upper limit rotational speed N2) of the circuit including the boost converter 40, the predetermined frequency Fc1. Is set to the cutoff frequency Fc, and when the rotational speed Nm of the motor 32 is within the resonance rotational speed range, the predetermined frequency Fc2 or the predetermined frequency Fc3 smaller than the predetermined frequency Fc1 is set to the cutoff frequency Fc. When Nm is outside the resonance speed range, the charge / discharge current Ib of the battery 36 is The controllability of the motor 32 can be improved by increasing the followability of the filtered current FIb. When the rotational speed Nm of the motor 32 is within the resonance rotational speed region, the ripple component of the filtered current FIb is increased. And the influence of the ripple component of the filtered current FIb can be suppressed from appearing in the behavior of the vehicle.

  Further, according to the electric vehicle 20 of the embodiment, when the rotation speed Nm of the motor 32 is in the resonance rotation speed region, the predetermined frequency Fc2 is set to the cut-off frequency Fc when the battery temperature Tb of the battery 36 is equal to or lower than the threshold value Tbref. When the battery temperature Tb of the battery 36 is higher than the threshold value Tbref, the predetermined frequency Fc3 smaller than the predetermined frequency Fc2 is set as the cutoff frequency Fc. Therefore, the controllability of the motor 32 is increased according to the battery temperature Tb of the battery 36. Or the behavior of the vehicle can be made more appropriate.

  In the electric vehicle 20 of the embodiment, when the rotational speed Nm of the motor 32 is in the resonance rotational speed region, the predetermined frequency Fc2 is set to the cutoff frequency Fc when the battery temperature Tb of the battery 36 is equal to or lower than the threshold Tbref. When the battery temperature Tb is higher than the threshold value Tbref, the predetermined frequency Fc3 smaller than the predetermined frequency Fc2 is set as the cutoff frequency Fc. However, regardless of the battery temperature Tb, the predetermined frequency Fc2 or the predetermined frequency Fc3 is set to the cutoff frequency Fc. It may be set.

  In the embodiment, the present invention is applied to the electric vehicle 20 including the motor 32 that can input and output power to the drive shaft 22 connected to the drive wheels 26a and 26b. As described above, the present invention may be applied to a hybrid vehicle 120 including the engine 122 and the motor 124 connected to the drive shaft 22 through the planetary gear mechanism 126 and the motor 32 capable of inputting / outputting power to / from the drive shaft 22. Good. Further, as illustrated in the hybrid vehicle 220 of the modification of FIG. 6, an inner rotor 232 connected to the crankshaft of the engine 122 and an outer rotor 234 connected to the drive shaft 22 connected to the drive wheels 26a and 26b, It is also possible to include a counter-rotor motor 230 that transmits a part of the power from the engine 122 to the drive shaft 22 and converts the remaining power into electric power. Further, as illustrated in the hybrid vehicle 320 of the modified example of FIG. 7, the motor 32 is attached to the drive shaft 22 via the transmission 330 and the engine 122 is connected to the rotation shaft of the motor 32 via the clutch 329. The hybrid vehicle 320 outputs the power from the engine 122 to the drive shaft 22 via the rotation shaft of the motor 32 and the transmission 330 and outputs the power from the motor 32 to the drive shaft 22 via the transmission 330. It may be applied. In these hybrid vehicles 120, 220, and 320, the charge / discharge power Pb of the battery 36 is the product of the filtered current FIb obtained by subjecting the charge / discharge current Ib of the battery 36 to the low-pass filter process and the voltage Vb between the terminals of the battery 36. And the calculated charge / discharge power Pb of the battery 36 becomes the charge / discharge required power Pb * of the battery 36 set according to the storage ratio SOC of the battery 36 (in the example of FIG. The charging / discharging control of the battery 36 may be performed by controlling the motor 124). In this case, similarly to the embodiment, by setting the cutoff frequency Fc according to the rotational speed Nm of the motor 32 and the battery temperature Tb of the battery 36, the same effect as in the embodiment can be obtained.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the motor 32 corresponds to a “motor”, the battery 36 corresponds to a “battery”, the boost converter 40 corresponds to a “boost converter”, the capacitor 46 corresponds to a “drive voltage system capacitor”, and the capacitor 48 corresponds to a “battery voltage system capacitor”, the current sensor 37 b corresponds to a “current sensor”, and the electronic control unit 50 that executes the cut-off frequency setting routine of FIG. 4 corresponds to a “control unit”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of drive devices.

  20 electric vehicle, 22 drive shaft, 24 differential gear, 26a, 26b drive wheel, 32 motor, 32a rotational position detection sensor, 33U, 33V current sensor, 34 inverter, 36 battery, 37a voltage sensor, 37b current sensor, 37c temperature sensor , 40 Boost converter, 42 Drive voltage system power line, 44 Battery voltage system power line, 46, 48 Capacitor, 46a, 48a Voltage sensor, 50 Electronic control unit, 52 CPU, 54 ROM, 56 RAM, 60 Ignition switch, 61 shift Lever, 62 Shift position sensor, 63 Accelerator pedal, 64 Accelerator pedal position sensor, 65 Brake pedal, 66 Brake pedal position sensor, 68 Vehicle speed sensor, 120, 220, 320 Hybrid car, 122 engine, 124 motor, 126 planetary gear mechanism, 230 rotor motor, 232 inner rotor, 234 outer rotor, 329 clutch, 330 transmission, D11-D16, D31, D32 diode, L reactor, T11-T16, T31, T32 transistors.

Claims (2)

A motor, a battery, a booster converter that has a reactor and boosts the power of a battery voltage system to which the battery is connected and can be supplied to the drive voltage system to which the motor is connected, and is attached to the drive voltage system A drive voltage system capacitor, a battery voltage system capacitor attached to the battery voltage system, a current sensor for detecting a battery current input / output from the battery, and a low-pass filter for attenuating a frequency component having a frequency greater than a cutoff frequency The torque command of the motor is set in consideration of the filtered current obtained by applying the process to the battery current detected by the current sensor, and the motor is controlled so that the motor is driven by the set torque command. A drive unit comprising a control means,
When the rotational speed of the motor is within a resonant rotational speed region of a circuit composed of the boost converter , the drive voltage system capacitor, and the battery voltage system capacitor , the control means is configured so that the rotational speed of the motor A means for setting the cut-off frequency to a smaller frequency than when outside.
Drive device. The drive device according to claim 1,
The control means is configured such that when the rotation speed of the motor is within the resonance rotation speed range and the temperature of the battery is higher than a predetermined temperature, the temperature of the battery is lower than the predetermined temperature. Is a means for setting a small frequency as the cutoff frequency,
Drive device.

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