JP2013138580A - Drive unit and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reduction of a non-boosting region in an operable region of a motor.SOLUTION: A drive unit performs the steps of: calculating the inductance L of a reactor according to a pulsation component (a difference between a lower arm on-off current IL1 and a lower arm off-on current IL0) of a reactor current IL while a voltage VH of a driving voltage system is raised with respect to a voltage VL of a battery voltage system by a step-up converter; setting a lower limit rotation number Nrfmin and an upper limit rotation number Nrfmax of a resonance region on the basis of the calculated inductance L of the reactor, and setting a step-up/non step-up line using the set lower limit rotation number Nrfmin and the set upper limit rotation number Nrfmax of the resonance region so that the resonance region is included in a step-up region and a PWM region; and setting driving-point and voltage relationship by using the set step-up/non step-up line, and setting driving-point and control method relationship by using the step-up/non step-up line and the PWM rectangular pulse line.

Description

  The present invention relates to a drive device and an automobile, and more specifically, a motor, an inverter for driving the motor, a battery, a voltage of a drive voltage system having a reactor and connected to the inverter, and a battery voltage to which the battery is connected. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device including a boost converter capable of boosting the voltage of the system and a capacitor attached to the drive voltage system, and an automobile including such a drive device.

  Conventionally, as this type of drive device, there are a motor, an inverter for driving the motor, a battery, a boost converter that has a reactor and can boost the power from the battery and supply it to the inverter, and an inverter from the boost converter When the target operating point of the motor is included in the resonance region specified by experiment or analysis in advance as a region including the operating point of the motor when resonance occurs in the boost converter, There has been proposed one that controls the boost converter so that the voltage on the inverter side becomes a predetermined voltage higher than the voltage on the battery side, and controls the inverter using a sine wave PWM control method (see, for example, Patent Document 1). In this drive device, the above-described control controls the inverter more appropriately so that an excessive voltage does not act on the boost converter and the capacitor and an excessive current does not flow.

JP 2009-225634 A

  In such a drive device, in order to suppress the loss due to the boost converter, it is preferable to widen the non-boosting region where the inverter side voltage is not higher than the battery side voltage in the motor operating region. Although it is known that the rotational speed range of the motor that becomes the resonance region is determined according to the inductance of the reactor, etc., in the above-described driving device, the resonance region is determined in advance by experiments or analysis. Considering secular change and the like, it is necessary to set the resonance range to some extent, and there is a problem that the non-boosting region becomes narrow.

  The drive device and the automobile of the present invention are mainly intended to suppress the non-boosting region from being narrowed in the motor operable region.

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

The drive device of the present invention is
A motor, an inverter for driving the motor, a battery, and a drive voltage system to which the inverter is connected with or without boosting power of a battery voltage system having a reactor and connected to the battery Obtained by applying the target drive point of the motor to a boost converter that can be supplied, a capacitor attached to the drive voltage system, and a drive point voltage relationship between the target drive point of the motor and the target voltage of the drive voltage system The boost converter is controlled so that the voltage of the drive voltage system is adjusted according to the target voltage of the drive voltage system, and the drive point control system relationship between the target drive point of the motor and the control system of the inverter Control means for controlling the inverter by a control method obtained by applying a target drive point of the motor,
The inductance of the reactor is calculated according to the pulsation component of the current of the reactor when the voltage of the drive voltage system is boosted with respect to the voltage of the battery voltage system by the boost converter, and the calculated inductance of the reactor And divides the operable region of the motor into the boosting region and the non-boosting region so that the resonance region of the circuit including the reactor and the capacitor is included in the boosting region between the boosting region and the non-boosting region. The drive point voltage relationship is set, and the operable region of the motor is divided into the PWM region and the rectangular wave region so that the resonance region is included in the PWM region of the PWM region and the rectangular wave region. Correspondence setting means for setting the drive point control method relationship,
It is a summary to provide.

  In the driving apparatus according to the present invention, the driving voltage system according to the target voltage of the driving voltage system obtained by applying the target driving point of the motor to the driving point voltage relationship between the target driving point of the motor and the target voltage of the driving voltage system. The boost converter is controlled so that the voltage of the inverter is adjusted, and the inverter is controlled by a control method obtained by applying the target drive point of the motor to the drive point control method relationship between the target drive point of the motor and the control method of the inverter. In the device, the inductance of the reactor is calculated according to the pulsation component of the current of the reactor when the voltage of the drive voltage system is boosted with respect to the voltage of the battery voltage system by the boost converter, and the calculated inductance of the reactor is used. The motor can operate so that the resonance region of the circuit including the reactor and the capacitor is included in the boosting region of the boosting region and the non-boosting region. The drive region voltage is set by dividing the region into a boost region and a non-boost region, and the operable region of the motor is defined as a PWM region and a rectangle so that the resonance region is included in the PWM region of the PWM region and the rectangular wave region. The drive point control system relationship is set by dividing into wave regions. As a result, the resonance region is set more appropriately (according to the actual inductance of the reactor) based on the manufacturing variation of the reactor and the secular change, and the drive point voltage relationship and the drive point control method relationship are set more appropriately. be able to. As a result, the resonance region can be set smaller, and the non-boosting region can be prevented from narrowing. As described above, by suppressing the non-boosting region from being narrowed, the effect of not boosting the voltage of the drive voltage system with respect to the voltage of the battery voltage system, for example, the effect of reducing the loss due to the boost converter, etc. It can suppress that the area | region which can be narrowed.

  Here, the “target drive point of the motor” is a drive point indicated by the target torque and the rotation speed of the motor. In addition, the “resonance region” may cause resonance in a circuit including a reactor and a capacitor when the drive voltage system voltage is not boosted with respect to the battery voltage system voltage and the inverter is controlled by the rectangular wave control method. This is an expected area. Further, the “boost region” is a region in which the driving voltage system voltage is boosted with respect to the battery voltage system voltage in the motor operable region, and the “non-boosting region” is the driving voltage in the motor operable region. This is a region where the system voltage is not boosted with respect to the battery voltage system voltage. In addition, the “PWM region” is a PWM (pulse width modulation) control method (a sine wave control method that supplies a pseudo three-phase AC voltage to the motor or an overmodulated three-phase AC voltage to the motor. This is the area where the inverter is controlled by the supplied overmodulation control system. The “rectangular wave area” controls the inverter by the rectangular wave control system (control system for supplying the rectangular wave voltage to the motor) in the motor operable area. It is an area to do.

  In the driving apparatus according to the present invention, the correspondence setting unit applies the calculated reactor inductance to the inductance resonance relationship between the inductance of the reactor and the rotation speed range of the resonance area, thereby rotating the rotation speed range of the resonance area. Further, the correspondence relationship setting means includes a rotation speed range of the resonance region in a basic boosting non-boosting line that temporarily divides the operable region of the motor into the boosting region and the non-boosting region. An outer portion and a portion of the PWM rectangular wave line that temporarily divides the operable region of the motor into the PWM region and the rectangular wave region are within the rotational speed range of the resonant region. The operable region of the motor is divided into the boosting region and the non-boosting region by a boosting non-boosting line set by connecting the upper and lower limits of the range. A means for setting the driving point voltage relationship may be a thing. In this aspect of the drive device of the present invention, the correspondence setting means divides the operable region of the motor into the PWM region and the rectangular wave region by the boost non-boosting line and the PWM rectangular wave line. It may be a means for setting the drive point control system relationship.

  Further, in the driving apparatus of the present invention, the correspondence setting means calculates a capacitance of the capacitor using an integrated value of discharge current from the capacitor when the charge of the capacitor is discharged, and calculates the calculated reactor. The drive point voltage relationship and the drive point control method relationship may be set using the calculated inductance and the calculated capacitance of the capacitor.

  The automobile of the present invention includes a motor, an inverter for driving the motor, a battery, and the inverter connected to the battery voltage system having a reactor and boosting or not boosting the electric power of the battery voltage system. A boost converter capable of supplying the drive voltage system, a capacitor attached to the drive voltage system, and a drive point voltage relationship between a target drive point of the motor and a target voltage of the drive voltage system. The boost converter is controlled so that the voltage of the drive voltage system is adjusted according to the target voltage of the drive voltage system obtained by applying a point, and the target drive point of the motor and the control method of the inverter And a control means for controlling the inverter by a control method obtained by applying a target drive point of the motor to the drive point control method relationship. The inductance of the reactor is calculated according to the pulsation component of the current of the reactor when the voltage of the driving voltage system is boosted with respect to the voltage of the battery voltage system by a converter, and the calculated inductance of the reactor is used. The operable region of the motor is divided into the boosting region and the non-boosting region so that the resonance region of the circuit including the reactor and the capacitor is included in the boosting region between the boosting region and the non-boosting region. The drive point voltage relationship is set, and the operable region of the motor is divided into the PWM region and the rectangular wave region so that the resonance region is included in the PWM region of the PWM region and the rectangular wave region. A driving device having a correspondence setting means for setting the driving point control system relationship is mounted, and travels using the power from the motor. The gist.

  Since the automobile of the present invention is equipped with the drive device of the present invention according to any one of the above-described aspects, the effect of the drive device of the present invention, for example, the effect of suppressing the non-boosting region from being narrowed, etc. The same effect can be achieved.

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. It is a block diagram which shows the outline of a structure of an electric drive system. It is explanatory drawing which shows an example of the relationship between the torque command Tm * and the rotation speed Nm of the motor 32, and the target voltage VHtag of the drive voltage system electric power line 42. 4 is an explanatory diagram showing an example of a relationship between a torque command Tm * and a rotation speed Nm of a motor 32 and a control method of an inverter 34. FIG. It is explanatory drawing shown about the setting method of a pressure | voltage rise / non-boost line. It is a flowchart which shows an example of the inductance calculation routine performed by the electronic control unit 50 of an Example. It is a flowchart which shows an example of the line setting routine performed by the electronic control unit 50 of an Example. FIG. 7 is an explanatory diagram showing an example of a time change state of a reactor current IL when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 by the boost converter 40. It is explanatory drawing which shows an example of a current inductance relationship. It is explanatory drawing which shows an example of the relationship between the inductance L of the reactor 41, the minimum rotation speed Nrfmin of a resonance area | region, and the upper limit rotation speed Nrfmax. It is explanatory drawing shown about a mode that a pressure | voltage rise non boosting line is set. 4 is a flowchart showing an example of a capacity calculation routine executed by the electronic control unit 50. 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. 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 to which the battery 36 is connected. 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, the system main relay 45 provided in the drive voltage system power line 42, and the power for controlling the entire vehicle. And a control unit 50, a.

  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 on the boost converter 40 side of the system main relay 45 in the battery voltage system power line 44. Hereinafter, the transistor T31 of the boost converter 40 may be referred to as “upper arm” and the transistor T32 may be referred to as “lower arm”.

  The electronic control unit 50 is configured as a microprocessor centered on the CPU 52. In addition to the CPU 52, a ROM 54 that stores a processing program, a RAM 56 that temporarily stores data, and a nonvolatile memory that holds the stored data. A flash memory 58 and an input / output port (not shown) are provided. The electronic control unit 50 includes a rotational position θm of the rotor of the motor 32 from a rotational position detection sensor 32a that detects the rotational position of the rotor of the motor 32, and phase currents flowing in the V phase and W phase of the three-phase coil of the motor 32. The phase currents Iv and Iw from the current sensors 33V and 33W for detecting the current (positive when flowing from the inverter 34 side to the motor 32 side), the terminal voltage Vb from the voltage sensor 37a attached between the terminals of the battery 36 , Charge / discharge current Ib from current sensor 37b attached to the output terminal of battery 36, battery temperature Tb from temperature sensor 37c attached to battery 36, connection point between transistors T31 and T32 of boost converter 30, and reactor L The reactor current IL from the current sensor 41a attached between the terminals (connected from the reactor L side) The voltage of the capacitor 46 (voltage of the drive voltage system power line 42) VH from the voltage sensor 46a attached between the terminals of the capacitor 46, and the voltage attached between the terminals of the capacitor 48. The voltage of the capacitor 48 from the sensor 48a (voltage of the battery voltage system power line 44) VL, the ignition signal from the ignition switch 60, the shift position SP from the shift position sensor 62 that detects the operation position of the shift lever 61, and the accelerator pedal 63 Accelerator opening degree Acc from the accelerator pedal position sensor 64 for detecting the depression amount of the brake pedal, brake pedal position BP from the brake pedal position sensor 66 for detecting the depression amount of the brake pedal 65, vehicle speed V from the vehicle speed sensor 68, etc. are input ports. Through Have been entered. From the electronic control unit 50, a switching control signal to the transistors T11 to T16 of the inverter 34, a switching control signal to the transistors T31 and T32 of the boost converter 40, a drive signal to the system main relay 45, and the like are output via the output port. Has been. 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 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. The torque command Tm * as the torque to be output from the motor 32 is set, and the transistors T11 to T16 of the inverter 34 are switched and controlled so that the motor 32 is driven by the set torque command Tm *, and the drive voltage system power line The voltage VH of 42 is a target voltage VHtag based on the torque command Tm * of the motor 32 and the rotational speed Nm. Controlling switching transistors T31, T32 of the so that the boost converter 40.

  Here, in the embodiment, the inverter 34 is controlled by any one of a sine wave control method, an overmodulation control method, and a rectangular wave control method. In the sine wave control method, in PWM (pulse width modulation) control that adjusts the ratio of the on-time of the transistors T11 to T16 by comparing the voltage command of the motor 32 and the triangular wave (carrier wave) voltage, the amplitude of the triangular wave voltage is smaller than the amplitude. In this control, a pseudo three-phase AC voltage obtained by converting a sinusoidal voltage command is supplied to the motor 32. The overmodulation control method is a control for supplying to the motor 32 an overmodulation voltage obtained by converting a sinusoidal voltage command having an amplitude larger than the amplitude of the triangular wave voltage in PWM (pulse width modulation) control. Further, the rectangular wave control method is a control for supplying a rectangular wave voltage to the motor 32.

  Next, the control of the inverter 34 and the boost converter 40 will be specifically described. The electronic control unit 50 first sets the target voltage VHtag of the drive voltage system power line 42 based on the target drive point (torque command Tm * and rotation speed Nm) of the motor 32 and controls the inverter 34 (sine wave control). System, overmodulation control system, rectangular wave control system). FIG. 3 is an explanatory diagram showing an example of the relationship between the torque command Tm * and the rotational speed Nm of the motor 32 and the target voltage VHtag of the drive voltage system power line 42 (hereinafter sometimes referred to as drive point voltage relationship). FIG. 4 is an explanatory diagram showing an example of the relationship between the torque command Tm * and the rotational speed Nm of the motor 32 and the control method of the inverter 34 (hereinafter sometimes referred to as a drive point control method relationship). Here, in FIG. 3 and FIG. 4, a region (first quadrant) in which the torque command Tm * and the rotation speed Nm of the motor 32 are positive is illustrated. In FIG. 3 and FIG. 4, the “boosting non-boosting line” is a non-boosting area that does not boost the voltage VH of the driving voltage system power line 42 relative to the voltage VL of the battery voltage system power line 44. This is a line for dividing the boosting region into a boosting region to be boosted. Further, in FIG. 3, “V1” to “V3” sequentially increase in the high voltage range in the boosting region as compared with the voltage VL of the battery voltage system power line 44 (for example, every 50V or 100V). ) Trending equivoltage line. In addition, in FIG. 4, “non-boosting, sine wave”, “boosting, rectangular wave” and the like indicate a non-boosting region or a boosting region and a control method of the inverter 34 (sine wave control method, overmodulation control method, rectangular wave). The “PWM rectangular wave line” is a PWM control method (sine wave control method or overmodulation control method) in which the motor 32 can be driven in each of the non-boosting region and the boosting region. This is a line for dividing the PWM region to be controlled and the rectangular wave region for controlling the inverter 34 by the rectangular wave control method. 3 and 4, the resonance region (hatched region) is an inverter in a rectangular wave control system without boosting the voltage VH of the drive voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44. 34 is an area where it is assumed that LC resonance may occur in the circuit including the reactor L of the boost converter 40 and the capacitor 46 (by the reactor L and the capacitor 46 of the boost converter 40). Details of the resonance region will be described later.

  The drive point voltage relationship in FIG. 3 is determined by being divided into a non-boosting region and a boosting region by a boosting non-boosting line. Specifically, the drive point voltage relationship is such that the torque command Tm * of the motor 32 and the side where the absolute value of the rotational speed Nm is smaller than the boost non-boosting line is the non-boosting region and the torque command Tm of the motor 32 from the boost non-boosting line. * And the side where the absolute value of the rotational speed Nm is large is determined to be the boosting region. In the non-boosting region, the voltage VL of the battery voltage system power line 44 and the inter-terminal voltage Vb of the battery 36 are set to the target voltage VHtag of the driving voltage system power line 42. A voltage (voltages V1 to V3 in FIG. 3) according to the torque command Tm * and the rotation speed Nm is set to the target voltage VHtag of the drive voltage system power line 42. The drive point control method relationship in FIG. 4 is that a boosted non-boosted line and a PWM rectangular wave line are divided into a PWM region (region of a sine wave control method and an overmodulation control method) and a rectangular wave region (region of a rectangular wave control method). Separated and determined. Specifically, the drive point control method relationship is such that in each of the non-boosting region and the boosting region, the PWM region (sine wave control method region, Overmodulation control region) and rectangular wave region (rectangular wave control region). As can be seen from FIG. 3 and FIG. 4, the resonance region is set to be included in the boost region and to be included in the PWM region (in the example of FIG. 4, a sine wave control method region). . In the embodiment, the voltage VH of the drive voltage system power line 42 is set by applying the torque command Tm * and the rotation speed Nm of the motor 32 to the drive point voltage relationship of FIG. 3, and the drive point control of FIG. The control system of the inverter 34 is set by applying the torque command Tm * of the motor 32 and the rotation speed Nm to the system relationship.

  Here, a method for setting the boosting non-boosting line will be described. FIG. 5 is an explanatory diagram showing a method for setting boosted non-boosted lines. As shown in FIG. 5, the boosting non-boosting line (see the thick solid line in FIGS. 3 and 4) is a basic boosting non-boosting line (a point in FIG. 5) as a line that temporarily divides the non-boosting region and the boosting region. Can be set by correcting the basic boosting non-boosting line so that the resonance region is included in the boosting region (and PWM region) in the non-boosting region side of the basic boosting non-boosting line. .

  The basic boosting / non-boosting line, for example, allows the motor 32 to drive the target driving point even if the driveable region of the motor 32 does not boost the voltage VH of the driving voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44. And the remaining area (step-up required area) excluding the step-up unnecessary area of the driveable area of the motor 32, or the driveable area of the motor 32 However, when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 in the boost unnecessary region, the motor 32, the inverter 34, the battery 36, The high-efficiency region during boosting, which increases the efficiency of the electric drive system including the converter 40, is excluded from the boost unnecessary region, and the high-efficiency region during boosting is added to the boosting-necessary region. Can or shall be stipulated to be provisionally divided and regions, the.

  The reason why the boost non-boosting line is determined so that the resonance region is included in the boosting region (and the PWM region) is as follows. When the inverter 34 is controlled by the rectangular wave control method, the switching loss is reduced due to a decrease in the number of switching times of the transistors T11 to T16, compared to when the inverter 34 is controlled by the PWM control method (sine wave control method or overmodulation control method). However, since a rectangular wave voltage is supplied to the motor 32, the power supplied to the motor 32 is considered to include a specific harmonic. When the harmonic frequency is synchronized with the natural frequency determined by the inductance L of the reactor 41 of the boost converter 40 and the capacitance Cvh of the capacitor 46, a resonance phenomenon occurs, and an overvoltage acts on the boost converter 40 or an overcurrent is generated. May flow. Therefore, in the embodiment, as shown in FIG. 3, the drive point voltage relationship is set by dividing into the non-boosting region and the boosting region by the boosting non-boosting line so that the resonance region is included in the boosting region. As shown in Fig. 4, the PWM region (sine wave control method or overmodulation control method region) and the rectangular wave region are divided by the boost non-boosting line and the PWM rectangular wave line so that the resonance region is included in the PWM region. Thus, the drive point control system relationship is set.

  Thus, when the target voltage VHtag of the drive voltage system power line 42 and the control method of the inverter 34 are set, the voltage VH of the drive voltage system power line 42 should be boosted with respect to the battery voltage system power line 44 (target drive of the motor 32). When the point is in the boost region), the transistors T31 and T32 of the boost converter 40 are switched and controlled so that the voltage VH of the drive voltage system power line 42 becomes the target voltage VHtag higher than the voltage VL of the battery voltage system power line 44. The transistors T11 to T16 of the inverter 34 are subjected to switching control by a control method set out of a sine wave control method, an overmodulation control method, and a rectangular wave control method so that torque according to the torque command Tm * is output from the motor 32. . In the embodiment, the switching control of the transistors T31 and T32 of the boost converter 40 is performed by the following equation (1) using the voltage VH and the target voltage VHtag of the drive voltage system power line 42 and the voltage VL of the battery voltage system power line 44. Target duty ratio Dtag used for switching of transistors T31 and T32 of boost converter 40 is set, and transistors T31 and T32 are set using the set target duty ratio Dtag and a predetermined carrier frequency Fc (for example, several kHz). It was supposed to be done by switching control. Here, Expression (1) is a relational expression in feedback control for setting the voltage VH of the drive voltage system power line 42 to the voltage command VH *, the first term on the right side is the feedforward term, and the second term on the right side. Is the proportional term in the feedback term, and the third term on the right side is the integral term in the feedback term. In equation (1), “k1” is the gain of the proportional term, and “k2” is the gain of the integral term. If the dead time for preventing both the transistors T31 and T32 from turning on when switching the transistors T31 and T32 on and off is taken into consideration, the target duty ratio is not taken into consideration. Dtag is a value indicating the ratio of the ON time of the transistor T31 to the sum of the ON time of the transistor T31 and the ON time of the transistor T32 in the switching cycle time Tc corresponding to the reciprocal of the carrier frequency Fc.

  Dtag = VL / VHtag + k1, (VHtag-VH) + k2, ∫ (VHtag-VH) dt (1)

  On the other hand, when there is no need to boost the voltage VH of the drive voltage system power line 42 with respect to the battery voltage system power line 44 (when the target drive point of the motor 32 is in the non-boosting region), the drive voltage system power line 42 The transistors T31 and T32 of the boost converter 40 are controlled to be not boosted with respect to the voltage VL of the battery voltage system power line 44, and a torque corresponding to the torque command Tm * is output from the motor 32. The transistors T11 to T16 of the inverter 34 are subjected to switching control by a set control method among a sine wave control method, an overmodulation control method, and a rectangular wave control method.

  Next, the operation of the electric vehicle 20 of the embodiment configured as described above, particularly the operation when calculating the inductance L of the reactor 41 or setting the boost non-boosting line will be described. FIG. 6 is a flowchart illustrating an example of an inductance calculation routine executed by the electronic control unit 50 of the embodiment. FIG. 7 is a flowchart illustrating an example of a line setting routine executed by the electronic control unit 50 of the embodiment. is there. The routine of FIG. 6 is repeatedly executed when the voltage VH of the drive voltage system power line 42 is boosted to the battery voltage system power line 44 by the boost converter 40, and the routine of FIG. 7 is executed at the time of ignition. .

  When the inductance calculation routine is executed, the CPU 52 of the electronic control unit 50 first switches the voltage VL of the battery voltage system power line 44 from the voltage sensor 48a and the lower arm (transistor T32) of the boost converter 40 from off to on. Lower arm off-on-time current IL0, which is the reactor current IL at off-on, and lower arm on-off current IL1, which is the reactor current IL at on-off when the lower arm of the boost converter 40 is turned off from the on-off. A process of inputting data such as the lower arm on time Ton, which is the duration of arm on, is executed (step S100). FIG. 8 is an explanatory diagram showing an example of a time change state of the reactor current IL when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 by the boost converter 40. It is. When the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44, the switching control of the transistors T31 and T32 causes a ripple ( Pulsation). The lower arm off-on current IL0 and the lower arm on-off current IL1 are input as detected by the current sensor 41a during off-on and on-off, respectively. Further, the lower arm on time Ton is inputted by using the switching cycle time Tc corresponding to the reciprocal of the carrier frequency Fc and the target duty ratio Dtag.

  When the data is input in this manner, the average of the reactor current ILave as an average value of the reactor current IL is calculated by dividing the sum of the input lower arm off-on current IL0 and the lower arm on-off current IL1 by the lower arm on-time Ton ( Step S110), using the lower arm off-on current IL0, the lower arm on / off current IL1, the voltage VL of the battery voltage system power line 44, and the lower arm on time Ton, the inductance L of the reactor 41 is calculated by the following equation (2). (Step S120), in addition to the calculated average reactor current ILave and the inductance L of the reactor 41, in addition to the current inductance relationship stored in the flash memory 58 (correspondence between the average reactor current ILave and the inductance L of the reactor 41) Update this It was re-stored in the flash memory 58 and (step S130), and ends the present routine. Here, equation (2) indicates that the difference between the lower arm on-off current IL1 and the lower arm off-on current IL0 is the lower arm on-off when the resistance component of the circuit while the lower arm of the boost converter 40 is on is considered to be very small. It can be considered that the slope of the ripple component (pulsation component) of the reactor current IL obtained by dividing by the time Ton and the value obtained by dividing the voltage VL of the battery voltage system power line 44 by the inductance L of the reactor 41 are substantially equal. This is an equation obtained by modifying the equation (3) based on the reason. An example of the current inductance relationship is shown in FIG. Generally, since magnetic saturation occurs in the reactor 41 in a region where the reactor current IL is large, the inductance L of the reactor 41 is high as a whole (particularly in a region where the reactor current IL is large to some extent) as shown in the figure. It tends to be smaller. Therefore, in this embodiment, this routine is repeatedly executed in order to acquire such a tendency and the maximum value Lmax, minimum value Lmin, and the like of the inductance L of the reactor 41. By such processing, it is possible to obtain the inductance L in consideration of manufacturing variations of the reactor 41 and secular change.

L = VL ・ Ton / (IL1-IL0) (2)
(IL1-IL0) / Ton = VL / L (3)

  The inductance calculation routine of FIG. 6 has been described above. Next, the line setting routine of FIG. 7 will be described. When the line setting routine is executed, the CPU 52 of the electronic control unit 50 first inputs the inductance L of the reactor 41 (step S200). Here, the inductance L of the reactor 41 is a representative value (for example, a median value or an average value (weighted moving average) among the inductances L of the plurality of reactors 41 in the current inductance relationship stored in the flash memory 58 in the embodiment. , Value by exponential moving average, etc.), mode, etc.).

  When the data is input in this way, the lower limit rotation speed Nrfmin and the upper limit rotation speed Nrfmax of the resonance region are set based on the input inductance L of the reactor 41 (step S210). FIG. 10 is an explanatory diagram showing an example of the relationship between the inductance L of the reactor 41, the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region. As illustrated, the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region are smaller as the inductance L of the reactor 41 is larger. Thus, by setting the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region using the inductance L of the reactor 41 obtained from the current inductance relationship, the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region are set at the time of manufacture. The lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region can be set more appropriately in consideration of manufacturing variations of the reactor 41, aging, etc. That is, the difference between the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax in the resonance region can be further reduced.

  Subsequently, the above-described basic boost non-boosting line and PWM rectangular wave line are acquired (step S220), and the lower limit rotation speed Nrfmin and upper limit rotation speed Nrfmax of the resonance region, the basic boost non-boosting line, and the PWM rectangular wave line are used. A boost non-boosting line is set (step S230), and this routine is finished. Then, as shown in FIG. 3, the boosting non-boosting line is divided into a non-boosting region and a boosting region to set the driving point voltage relationship, and as shown in FIG. The drive point control method relationship is set by dividing the PWM region (sine wave control method or overmodulation control method region) and the rectangular wave region in each of the non-boosting region and the boosting region by the PWM rectangular wave line.

  As shown in FIG. 11, the boosting non-boosting line is set as follows: a portion of the basic boosting non-boosting line that is less than the lower limit rotation speed Nrfmin or greater than the upper limit rotation speed Nrfmax of the resonance region and the lower limit rotation of the resonance region of the PWM rectangular wave line. It is set using a portion not less than the number Nrfmin and not more than the upper limit rotational speed Nrfmax. Specifically, it can be set by connecting both at the boundary (lower limit rotational speed Nrfmin and upper limit rotational speed Nrfmax). That is, in setting the boost non-boosting line, the region surrounded by the basic boost non-boosting line, the PWM rectangular wave line, the lower limit rotation speed Nrfmin and the upper limit rotation speed Nrfmax (the hatched area in the figure) is set as the resonance area. It can be set by correcting the basic boost non-boosting line so that the resonance region is included in the boosting region (and the PWM region). When the resonance region is determined in advance by experiment or analysis at the time of manufacturing or the like, it is necessary to set the resonance region wider to some extent in consideration of manufacturing variation of the inductance L of the reactor 41, secular change, and the like. For this reason, the non-boosting region is narrowed, so that the effect of not boosting the voltage VH of the drive voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44 (for example, the loss due to the boost converter 40 is reduced). There has been a problem that the area where the effects and the like can be produced cannot be sufficiently widened. On the other hand, in the embodiment, according to the pulsating component of the reactor current IL when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 by the boost converter 40. The calculated lower limit rotational speed Nrf and upper limit rotational speed Nrf of the resonance region are set using the calculated inductance L of reactor 41 (current inductance relationship), and the lower limit rotational speed Nrf and upper limit rotational speed Nrf of the resonant region and the basic boost non-boosting line And a PWM rectangular wave line are used to set a boost non-boosting line, a driving point voltage relationship is set using the boost non-boosting line, and a driving point control system is used using the boost non-boosting line and the PWM rectangular wave line By setting the relationship, it is possible to suppress the non-boosted region from becoming narrow. That is, in the non-boosting region side of the basic boosting non-boosting line, a region where the voltage VH of the driving voltage system power line 42 should be boosted with respect to the voltage VL of the battery voltage system power line 44 in order to avoid resonance in the circuit. It can be made smaller. As a result, it is possible to widen a region where the effect of not boosting the voltage VH of the drive voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44 can be obtained.

  According to the electric vehicle 20 of the embodiment described above, the pulsation of the reactor current IL when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 by the boost converter 40. The inductance L of the reactor 41 is calculated according to the component (difference between the lower arm on-off current IL1 and the lower arm off-on current IL0), and the lower limit rotational speed Nrfmin of the resonance region is calculated according to the calculated inductance L (current inductance relationship). And the upper limit rotational speed Nrfmax are set, the boost non-boosting line is set using the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the set resonance region so that the resonance region is included in the boosting region and the PWM region, The drive point voltage relationship is set using the boost line and the boost non-boost line is set. Because setting the driving point control method related with a PWM square wave lines, it is possible to prevent the non-boost region is narrowed. As a result, an area where the effect of not boosting the voltage VH of the drive voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44 (for example, the effect of reducing the loss by the boost converter 40) can be obtained. Can be made wider.

  In the electric vehicle 20 of the embodiment, a representative value (for example, a median value, an average value, a mode value, etc.) of a plurality of inductances L in the current inductance relationship is used as the inductance L of the reactor 41 so that the resonance region is the boost region and the PWM. The boosting non-boosting line is set so as to be included in the region, but instead of the representative value of the plurality of inductances L in the current inductance relationship, the maximum inductance Lmax and the minimum inductance Lmin in the current inductance relationship are used, The inductance L calculated immediately before may be used.

  In the electric vehicle 20 of the embodiment, the boost non-boosting line is set using the inductance L of the reactor 41 when the ignition is turned on. However, the present invention is not limited to this. For example, the shift position SP is set to the parking position or the neutral position. It may be set when it is set, or may be set every time the inductance L of the reactor 41 is calculated.

  In the electric vehicle 20 of the embodiment, the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region are set according to the calculated inductance L (current inductance relationship) of the reactor 41, and the lower limit rotational speed Nrfmin and the upper limit of the set resonance region are set. The boosting non-boosting line is set using the rotational speed Nrfmax so that the resonance region is included in the boosting region and the PWM region, the drive point voltage relationship is set using the set boosting non-boosting line, and the boosting non-boosting line and the PWM rectangle Although the drive point control system relationship is set using the wave line, the resonance region is directly set in accordance with the inductance L of the reactor 41 without setting the lower limit rotation speed Nrfmin and the upper limit rotation speed Nrfmax of the resonance region. Set the boost non-boost line so that is included in the boost region and PWM region Or a thing directly resonance region may be or are set as driving point voltage relations and the driving point control method related to be included in the boosting region and the PWM region.

  In the electric vehicle 20 of the embodiment, a predetermined value is used for the capacitance Cvh of the capacitor 46, but a value calculated in the same manner as the inductance L of the reactor 41 may be used. FIG. 12 is a flowchart showing an example of a capacity calculation routine executed by the electronic control unit 50. In this modified example, this routine is executed when the ignition is off. It should be noted that during the execution of this routine, the boost converter 40 is stopped.

  When the capacity calculation routine is executed, the CPU 52 of the electronic control unit 50 first turns off the system main relay 45 to release the connection between the battery 36 and the battery voltage system power line 44 (step-up converter 40) (step S300). The voltage VH of the drive voltage system power line 42 is input from the voltage sensor 46a (step S310), and the input voltage VH of the drive voltage system power line 42 is started before starting a predetermined discharge process for discharging the charge of the capacitor 46. Is set to the pre-discharge start voltage VHstart as the voltage VH of the drive voltage system power line 42 (step S320), and a predetermined discharge process is started (step S330). Here, in the embodiment, the predetermined discharge process is performed by switching control of the transistors T11 to T16 of the inverter 34 so that the d-axis current flows through the motor 32.

  When the predetermined discharge process is started in this way, the reactor current IL from the current sensor 41a (positive when flowing from the reactor L side to the connection point side), and the V phase and W phase of the motor 32 from the current sensors 33V and 33W. Currents Iv and Iw (positive when flowing from the inverter 34 side to the motor 32 side) are input (step S340), and the following equations are used using the input V-phase and W-phase currents Iv and Iw of the motor 32: The phase current Iu of 32 U-phases is calculated by (4) (step S350), and the current flowing from the drive voltage system power line 42 to the inverter 34 side is calculated by the equation (5) using the phase currents Iu, Iv, Iw. Inverter supply current Idc is calculated (step S350). Here, Equation (4) is based on the sum of the phase currents Iu, Iv, and Iw flowing in the U phase, V phase, and W phase of the motor 32 being 0. Equation (5) obtains the current that flows from the drive voltage system power line 42 to the inverter 34 side, that is, the current that flows from the positive bus side of the drive voltage system power line 42 to the motor 32 side via the inverter 34. This is based on the fact that the current flowing from the motor 32 side to the negative electrode bus side of the drive voltage system power line 42 via the inverter 34 is not obtained.

Iu = -Iv-Iw (4)
Idc = max (Iu, 0) + max (Iv, 0) + max (Iw, 0) (5)

  Subsequently, the discharge current Ic from the capacitor 46 is calculated by subtracting the reactor current IL from the inverter supply current Idc (step S370). Now, considering that the system main relay 45 is turned off, the reactor current IL corresponds to the current discharged from the capacitor 48 and flowing to the drive voltage system power line 42 via the diode D31 of the boost converter 40. Therefore, the capacitor discharge current Ic can be obtained by subtracting the reactor current IL from the inverter supply current Idc. In consideration of the fact that the boost converter 40 is stopped (both transistors T31 and T32 are turned off), when the voltage VH of the drive voltage system power line 42 is higher than the voltage VL of the battery voltage system power line 44, the reactor The current IL becomes substantially zero, and after the voltage VH of the drive voltage system power line 42 becomes substantially equal to the voltage VL of the battery voltage system power line 44, the reactor current IL is a positive value until the discharge of the capacitor 48 is completed. It is thought that it becomes.

  Then, the current integrated value Ic is calculated by adding the discharge current Ic from the capacitor 46 calculated in step S370 to the previous value (previous Icsum) of the current integrated value Icsum that is set to the value 0 at the start of execution of the predetermined discharge process. (Step S380).

  Subsequently, the voltage VH of the drive voltage system power line 42 is input from the voltage sensor 46a (step S390), and the input voltage VH of the drive voltage system power line 42 may end the predetermined discharge process. 42 is compared with a threshold value VHref (for example, several tens of volts or the like) as the voltage VH (step S400). When the voltage VH of the drive voltage system power line 42 is higher than the threshold value VHref, it is determined that the predetermined discharge process is continued. Return to S340.

  In this way, when the voltage VH of the drive voltage system power line 42 reaches the threshold value VHref or less during the repeated execution of the processes of steps S340 to S400, the predetermined discharge process is terminated (step S410), and the drive voltage system at that time The voltage VH of the power line 42 is set to the post-discharge end voltage VHend as the voltage VH of the drive voltage system power line 42 after completing the predetermined discharge process (step S420), and the above-mentioned pre-discharge start voltage VHstart and the end of the discharge The capacitance Cvh of the capacitor 46 is calculated by the following equation (6) using the rear voltage VHend and the current integrated value Icsum (step S430), and this routine is finished. By such processing, the capacitance Cvh can be obtained in consideration of manufacturing variations of the capacitor 46 and aging.

  Cvh = Icsum / (VHstart-VHend) (6)

  When the capacitance Cvh of the capacitor 46 is thus obtained, the lower limit rotational speed Nrfmin and the upper limit rotational speed Nrfmax of the resonance region are set based on the inductance L (current inductance relationship) of the reactor 41 and the capacitance Cvh of the capacitor 46 when the ignition is turned on. The boost non-boosting line is set using the lower limit rotation speed Nrfmin and the upper limit rotation speed Nrfmax of the resonance region, the basic boost non-boosting line, and the PWM rectangular wave line, and the drive point voltage relationship is set using the set boost non-boosting line. And the drive point control system relationship may be set using the boost non-boosting line and the PWM rectangular wave line. By setting the drive point voltage relationship and the drive point control method relationship in this way, the calculated value is used for the inductance L (current inductance relationship) of the reactor 41, but a predetermined value is used for the capacitance Cvh of the capacitor 46. Compared to the embodiment to be used, it is possible to further suppress the non-boosting region from becoming narrower, and the effect of not boosting the voltage VH of the drive voltage system power line 42 with respect to the voltage VL of the battery voltage system power line 44. A region where an effect (for example, an effect of reducing loss due to boost converter 40) can be obtained can be further widened.

  In this modification, when the ignition is turned off, the predetermined discharge process is executed to calculate the capacitance Cvh of the capacitor 46. However, the present invention is not limited to this. For example, the calculation is performed when the shift position SP is a parking position or a neutral position. It is good also as what to do.

  In this modified example, as in the embodiment, the boosting non-boosting line is set and the driving point voltage relationship and the driving point control method relationship are set when the ignition is turned on. However, the present invention is not limited to this, and when the ignition is turned off. Alternatively, it may be executed when at least one of the inductance L of the reactor 41 and the capacitance Cvh of the capacitor 46 is calculated.

  Further, in this modification, the predetermined discharge process is executed while stopping the boost converter 40, but the predetermined discharge process may be executed while the transistor T31 of the boost converter 40 is kept on. In this case, while the voltage VH of the drive voltage system power line 42 is higher than the voltage VL of the battery voltage system power line 44, the drive voltage system power line 42 and the battery voltage system power line 44 are connected via the transistor T31 of the boost converter 40. After the voltage VH of the drive voltage system power line 42 becomes substantially equal to the voltage VL of the battery voltage system power line 44, the drive voltage is supplied from the battery voltage system power line 44 via the diode D31 of the boost converter 40. Power is supplied to the system power line 42.

  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. 14, 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. 15, 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 the embodiment, the present invention is applied to the electric vehicle 20, but may be applied to a drive device mounted on the electric vehicle 20 or the like.

  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 “motor”, the inverter 34 corresponds to “inverter”, the battery 36 corresponds to “battery”, the boost converter 40 corresponds to “boost converter”, and the capacitor 46 “ The electronic control unit 50 corresponds to “a capacitor” and “control means” or “correspondence setting means”.

  Here, the “motor” is limited to the motor 32 configured as a synchronous generator motor (so-called embedded magnet type synchronous generator motor) including a rotor embedded with a permanent magnet and a stator wound with a three-phase coil. Any type of motor, such as a synchronous generator motor (so-called surface magnet type synchronous generator motor) having a rotor with a permanent magnet attached to the surface and a stator wound with a three-phase coil, is not used. I do not care. The “inverter” is not limited to the inverter 34 and may be any type of inverter as long as it is for driving a motor. The “battery” is not limited to the battery 36 configured as a lithium ion secondary battery, and may be any type of battery such as a nickel hydride secondary battery, a nickel cadmium secondary battery, or a lead storage battery. Absent. The “capacitor” is not limited to the capacitor 46, and may be any type of capacitor as long as it is attached to the drive voltage system. “Control means” and “correspondence setting means” are not limited to a single electronic control unit, and may be a combination of a plurality of electronic control units. The “control means” is a drive obtained by applying the torque command Tm * and the rotational speed Nm to the relationship between the torque command Tm * and the rotational speed Nm of the motor 32 and the target voltage VHtag of the drive voltage system power line 42. The boost converter 40 is controlled so that the voltage VH of the drive voltage system power line 42 is adjusted according to the target voltage VHtag of the voltage system power line 42, and the torque command Tm * and the rotation speed Nm of the motor 32 and control of the inverter 34 are controlled. The control method obtained by applying the torque command Tm * and the rotational speed Nm to the method is not limited to the control of the inverter 34 so that the torque command Tm * is output from the motor 32. The target of the drive voltage system obtained by applying the target drive point of the motor to the drive point voltage relationship between the target drive point and the target voltage of the drive voltage system It is obtained by controlling the boost converter so that the voltage of the drive voltage system is adjusted according to the voltage and applying the target drive point of the motor to the drive point control method relationship between the target drive point of the motor and the control method of the inverter Any device can be used as long as it controls the inverter by the control method. As the “correspondence setting means”, the pulsating component (lower arm) of the reactor current IL when the voltage VH of the drive voltage system power line 42 is boosted with respect to the voltage VL of the battery voltage system power line 44 by the boost converter 40. The inductance L of the reactor 41 is calculated according to the difference between the on-off current IL1 and the lower arm off-on current IL0), and the lower limit rotational speed Nrfmin of the resonance region is determined according to the calculated inductance L of the reactor 41 (current inductance relationship). An upper limit rotational speed Nrfmax is set, a boost non-boosting line is set using the lower limit rotational speed Nrfmin and upper limit rotational speed Nrfmax of the set resonance region so that the resonance region is included in the boost region and the PWM region, and the set boost non-boosting The drive point voltage relationship is set using the line and And the PWM rectangular wave line are not limited to setting the driving point control system relationship, but when the voltage of the driving voltage system is boosted with respect to the voltage of the battery voltage system by the boost converter The reactor inductance is calculated according to the pulsation component of the reactor current, and the resonance region of the circuit including the reactor and the capacitor is included in the boosting region of the boosting region and the non-boosting region using the calculated reactor inductance. The motor operable region is divided into a boosting region and a non-boosting region to set the drive point voltage relationship, and the motor operable region is included in the PWM region of the PWM region and the rectangular wave region. As long as the drive point control method relationship is set by dividing the signal into the PWM region and the rectangular wave region, any method may be used.

  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 driving devices and automobiles.

  20 electric vehicle, 22 drive shaft, 24 differential gear, 26a, 26b drive wheel, 32 motor, 32a rotational position detection sensor, 33V, 33W current sensor, 34 inverter, 36 battery, 37a voltage sensor, 37b current sensor, 37c temperature sensor 40 step-up converter, 41 reactor, 41a current sensor, 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 58 flash memory, 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 vehicle, 122 Engine, 124 Motor, 126 Planetary gear mechanism, 329 Clutch, 330 Transmission, D11-D16, D31, D32 Diode, T11-T16, T31, T32 Transistor.

Claims (4)

A motor, an inverter for driving the motor, a battery, and a drive voltage system to which the inverter is connected with or without boosting power of a battery voltage system having a reactor and connected to the battery Obtained by applying the target drive point of the motor to a boost converter that can be supplied, a capacitor attached to the drive voltage system, and a drive point voltage relationship between the target drive point of the motor and the target voltage of the drive voltage system The boost converter is controlled so that the voltage of the drive voltage system is adjusted according to the target voltage of the drive voltage system, and the drive point control system relationship between the target drive point of the motor and the control system of the inverter Control means for controlling the inverter by a control method obtained by applying a target drive point of the motor,
The inductance of the reactor is calculated according to the pulsation component of the current of the reactor when the voltage of the drive voltage system is boosted with respect to the voltage of the battery voltage system by the boost converter, and the calculated inductance of the reactor And divides the operable region of the motor into the boosting region and the non-boosting region so that the resonance region of the circuit including the reactor and the capacitor is included in the boosting region between the boosting region and the non-boosting region. The drive point voltage relationship is set, and the operable region of the motor is divided into the PWM region and the rectangular wave region so that the resonance region is included in the PWM region of the PWM region and the rectangular wave region. Correspondence setting means for setting the drive point control method relationship,
A drive device comprising: The drive device according to claim 1,
The correspondence setting means is means for setting the rotation speed range of the resonance region by applying the calculated inductance of the reactor to the inductance resonance relationship between the inductance of the reactor and the rotation speed range of the resonance region,
Further, the correspondence relationship setting means includes a portion of the basic boosting non-boosting line that temporarily divides the operable region of the motor into the boosting region and the non-boosting region, and a portion outside the rotational speed range of the resonance region; Of the PWM rectangular wave line that temporarily divides the operable region into the PWM region and the rectangular wave region, and a portion within the rotational speed range of the resonant region is connected by the upper and lower limits of the rotational speed range of the resonant region Means for setting the driving point voltage relationship by dividing the operable region of the motor into the boosting region and the non-boosting region by a set boosting non-boosting line;
Drive device. The drive device according to claim 1 or 2,
The correspondence relationship setting means calculates the capacitance of the capacitor using an integrated value of the discharge current from the capacitor when the capacitor is discharged, and calculates the calculated inductance of the reactor and the calculated capacitance of the capacitor. A means for setting the drive point voltage relationship and the drive point control method relationship using
Drive device.   An automobile mounted with the drive device according to any one of claims 1 to 3 and traveling using power from the motor.

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