JP6481587B2 - Switched reluctance motor controller - Google Patents

Description

  The present invention relates to a control device for a switched reluctance motor.

  Patent Document 1 discloses a method for controlling a switched reluctance motor by switching the excitation start angle and the excitation end angle in each control mode at low load, medium load, and high load. The configuration of Patent Literature 1 includes a control device that executes the above-described control method in order to improve the operation efficiency and energy density of the switched reluctance motor.

JP2013-240200A

  However, in the configuration of Patent Document 1, the applied voltage is constant at the same magnitude as when the current is raised between the rise and fall of the current in the excitation interval. The slope becomes steep. When the switched reluctance motor is driven, if the change gradient of the excitation current becomes steep, the change in the excitation force becomes large, and vibration and noise may be deteriorated.

  The present invention has been made in view of the above circumstances, and can control vibrations and noise by controlling the magnitude of an appropriate applied voltage between the rise of the current and the fall of the current in the excitation interval. An object of the present invention is to provide a control device for a switched reluctance motor.

  Whether the voltage applied to the switched reluctance motor needs to be boosted in the hysteresis section between the current rising section and the current falling section in the excitation section in the switched reluctance motor control device. And determining means for determining whether or not boosting is not necessary by the determining means, and control means for executing control that does not boost the applied voltage in the hysteresis interval. .

  In the present invention, in the control device for the switched reluctance motor, it is determined whether or not it is necessary to boost the applied voltage in the hysteresis section between the current rising section and the current falling section in the excitation section. The magnitude of the applied voltage can be controlled appropriately. By executing control that does not increase the applied voltage in the hysteresis interval, it is possible to suppress a sudden change in current, to suppress an increase in the excitation force, and to reduce vibration and noise.

FIG. 1 is a schematic diagram showing a system configuration of a switched reluctance motor control apparatus according to an embodiment of the present invention. FIG. 2 is an explanatory diagram illustrating an example of an inverter circuit. FIG. 3 is a flowchart illustrating an example of motor control executed by the control device. FIG. 4A is a diagram illustrating a voltage waveform and a current waveform when the control device executes control that does not increase the voltage in the hysteresis interval. FIG. 4B is a diagram showing a voltage waveform and a current waveform when the control device executes control for boosting the voltage in the entire excitation interval. FIG. 5 is a map showing the characteristics of the SR motor. FIG. 6 is a diagram for explaining a voltage waveform and a current waveform when the necessary boosting is not performed in the hysteresis interval. FIG. 7 is a flowchart showing a modified example of the motor control executed by the control device. FIG. 8 is a skeleton diagram showing the vehicle of the first application example. FIG. 9 is a skeleton diagram illustrating a vehicle according to the second application example. FIG. 10 is a skeleton diagram illustrating a vehicle according to the third application example. FIG. 11 is a skeleton diagram illustrating a vehicle according to the fourth application example. FIG. 12 is a skeleton diagram illustrating a vehicle according to the fifth application example. FIG. 13 is a skeleton diagram showing the vehicle of the application example 6. FIG. 14 is a skeleton diagram illustrating a vehicle according to the seventh application example.

  Hereinafter, a switched reluctance motor control apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram showing a system configuration example according to an embodiment of the present invention. The system configuration of the present embodiment includes a switched reluctance motor (SRM) 1, an inverter 2, a booster 3, a battery 4, and a control device 100.

  A switched reluctance motor (hereinafter referred to as “SR motor”) 1 functions as a generator and a motor, and is electrically connected to a battery 4 via an inverter 2 and a booster 3. The booster 3 is provided between the inverter 2 and the battery 4 and boosts the voltage applied to the SR motor 1. For example, the booster 3 is configured by a boost converter. The control device 100 controls the SR motor 1 and is configured by an electronic control unit (ECU) having a CPU and a storage unit. The control device 100 is configured to control the SR motor 1 by controlling the inverter 2 and the booster 3.

  FIG. 2 is an explanatory diagram illustrating an example of an inverter circuit. First, the SR motor 1 electrically connected to the inverter 2 includes a stator 10 and a rotor 20.

  The stator 10 includes a plurality of stator teeth 11 as salient poles on an annular inner periphery. In the SR motor 1, since a pair of stator teeth 11, 11 form one phase, the stator 10 has a pair of stator teeth 11, 11 that form one of the three phases and a position that is opposed in the radial direction. Three sets are provided to be. A coil 12 connected to the inverter 2 is wound around each stator tooth 11.

  The rotor 20 is disposed on the radially inner side of the stator 10, and a plurality of rotor teeth 21 as salient poles are provided on an annular outer peripheral portion. The rotor 20 is configured to rotate integrally with a rotor shaft (not shown). In short, both the stator 10 and the rotor 20 are formed in a known salient pole structure. In the example illustrated in FIG. 2, the SR motor 1 includes a six-pole stator 10 and a four-pole rotor 20.

  Further, since the SR motor 1 is a three-phase AC type, the A phase is composed of a pair of stator teeth 11a, 11a and a coil 12a, the B phase is composed of a pair of stator teeth 11b, 11b and a coil 12b, and a pair of stator teeth 11c, 11c. And the C phase by the coil 12c. The rotor 20 includes a pair of rotor teeth 21x and 21x and a pair of rotor teeth 21y and 21y.

  Next, the electric circuit (inverter circuit) of the inverter 2 includes six switching elements so that three-phase alternating current can be passed, and is configured to apply a current to each coil 12 for each phase. The inverter circuit shown in FIG. 2 includes a transistor Tr as a switching element, and each phase includes two transistors and two diodes. The inverter 2 changes the value of the current flowing through the coil 12 by simultaneously turning on or off the two transistors in each phase. In the example shown in FIG. 2, the inverter 2 includes transistors Tra1 and Tra2 and diodes Da1 and Da2 in the A phase. In the B phase, transistors Trb1 and Trb2 and diodes Db1 and Db2 are provided. The C phase includes transistors Trc1 and Trc2 and diodes Dc1 and Dc2.

  The control device 100 starts applying a current to the coil 12 of the stator tooth 11 based on the positional relationship between the stator tooth 11 to be de-energized and the rotor tooth 21 that is closest to the stator tooth 11. The control device 100 receives a signal from a rotation speed sensor 51 that detects the rotation speed of the SR motor 1. The control device 100 has a storage unit in which various programs are stored, performs various calculations for controlling the SR motor 1 based on a signal input from the rotation speed sensor 51, and performs an inverter 2, a booster unit 3, A command signal is output to.

  The SR motor 1 applies a current to a coil 12 of a certain phase to excite the stator teeth 11 and generates a magnetic attractive force between the stator teeth 11 and the rotor teeth 21 near the stator teeth 11, thereby achieving SR SR. Torque of the motor 1 is generated. The magnetic attractive force can be broken down into circumferential and radial component forces. The component force in the circumferential direction is a rotational force. The radial component force is a radial force. That is, the motor torque is generated by the circumferential component force acting on the rotor 20. For example, when the stator teeth 11 and the rotor teeth 21 are completely overlapped in the circumferential direction (when the stator teeth 11 and the rotor teeth 21 are completely opposed in the radial direction), the magnetic attractive force is the radial direction. Will only work. That is, the rotational force does not act on the rotor teeth 21 and only the radial force acts.

  Also, the SR motor 1 stops energization of the coil 12 of the phase being applied with current under the control of the control device 100, switches the energization target to the coil 12 of another phase, and close to the stator teeth 11 of the new phase. A magnetic attractive force having radial and circumferential component forces is generated between the rotor teeth 21. In the control device 100, based on the positional relationship (relative position in the rotation direction) between the stator teeth 11 and the rotor teeth 21 from the signal of the rotation speed sensor 51, the control device 100 executes control to repeat switching of energization targets for each phase. Then, the rotor 20 is rotated. Note that the control device 100 is configured so that the stator tooth 11 to be excited becomes a position that completely overlaps the rotor tooth 21 in the radial direction when the current is applied to the coil 12 or completely. It can be controlled so that it is a non-excitation target by stopping energization of the coil 12 before and after overlapping with each other, and is again set as an excitation target when the next rotor tooth 21 approaches a predetermined position.

  By the way, the SR motor 1 is required to reduce noise and vibration. Radial component force (radial force) in the magnetic attractive force causes noise and vibration. Regarding the noise, the sound pressure generated by the driving SR motor 1 increases as the radial force increases. As for vibration, when the radial force acting on the SR motor 1 increases, the displacement of the stator 10 and the rotor 20 increases. Therefore, the control device 100 is configured to execute motor control that reduces noise and vibration of the SR motor 1 by reducing the radial force.

  FIG. 3 is a flowchart illustrating an example of motor control executed by the control device 100. The control device 100 reads information used when determining the applied voltage to the SR motor 1 (step S1). The information includes a resolver signal input from the rotation speed sensor 51. When the SR motor 1 is mounted on a vehicle, the accelerator opening signal input from the accelerator opening sensor, the vehicle speed signal input from the vehicle speed sensor, and the like are included in the information of step S1.

  The control device 100 calculates the rotational speed (SRM rotational speed) of the SR motor 1 using the information read in step S1 (step S2), and derives the torque command value (SRM command torque) of the SR motor 1 ( Step S3). In step S2, the motor rotational speed is calculated based on the resolver signal from the rotational speed sensor 51. In step S3, a torque command value for the SR motor 1 corresponding to the information related to the requested torque read in step S1 is derived. When the SR motor 1 is mounted on the vehicle as a driving power source, in step S3, the required torque is calculated using the accelerator opening signal, the vehicle speed signal, and a predetermined required torque map, and the required torque is calculated. A corresponding motor torque command value is derived.

  The control device 100 determines a hysteresis interval in the excitation interval based on the motor rotation speed in step S2 and the motor torque command value in step S3 (step S4). The excitation interval is an interval in which a current is applied to the coil 12 to be excited. The excitation section is composed of three sections: a current rising section, a hysteresis section, and a current falling section. The hysteresis section is a section between the current rising section and the current falling section. The method for determining the hysteresis interval may be a known method.

  The control device 100 determines whether or not it is necessary to step up the voltage applied to the SR motor 1 in the hysteresis interval among all the excitation intervals (step S5). The control device 100 includes a determination unit that executes the determination process of step S5. In step S5, whether or not the excitation voltage satisfies a voltage (predetermined value) necessary for satisfying the required torque is determined using a predetermined map indicating the relationship between the motor rotation speed (rotation angle) and the inductance in step S2. It may be configured to determine. In this case, when the excitation voltage is smaller than a predetermined value, it is necessary to boost the voltage in the boosting unit 3. On the other hand, when the excitation voltage is larger than a predetermined value, it is determined that the boosting by the boosting unit 3 is not necessary. As another example of step S5, the determination unit of the control device 100 determines whether the motor rotation speed is a low speed rotation with a predetermined value or less and a required power is a low output request with a predetermined value or less. It may be configured to. In this case, if the motor rotational speed is a low speed less than a predetermined value and the required power is a low output less than the predetermined value, an affirmative determination is made in step S5.

  When the SR motor 1 is mounted on the vehicle as a driving power source, in step S5, the SR motor 1 rotates at high speed and the required power is high based on the resolver signal from the rotation speed center 51 and the required power. It is determined whether it is an output. The required power can be derived using the above-described required torque, a vehicle speed signal from the vehicle speed sensor, and a predetermined required power map. That is, in step S5 in this case, it may be configured to determine whether or not the vehicle is traveling at a high vehicle speed and a high load.

  If the determination in step S5 is negative because boosting is not required in the hysteresis interval, the control device 100 increases the voltage only in the current rising interval and the falling interval in the excitation interval, and the hysteresis interval. Then, control that does not increase the voltage is executed (step S6). That is, the control device 100 performs control so that the voltage is not boosted only in the hysteresis section among all the excitation sections. The control device 100 includes a control unit that executes the control in step S6. For example, the control unit may be configured to execute control for prohibiting boosting by the boosting unit 3 in the hysteresis interval, and to control the applied voltage of the SR motor 1 without boosting. The relationship between the applied voltage and current when the control in step S6 is executed is shown in FIG.

  When the determination in step S5 is affirmative due to the necessity of boosting in the hysteresis section, the control device 100 executes control to boost the voltage in the entire excitation section (step S7). In step S <b> 7, the voltage boosted by the booster 3 is applied to the SR motor 1 in the current rising section, the hysteresis section, and the current falling section. FIG. 4B, which will be described later, shows the relationship between the applied voltage and current when the control in step S7 is executed.

  FIG. 4 is a diagram illustrating a voltage waveform and a current waveform when the motor control by the control device 100 is executed. FIG. 4A shows a voltage waveform and a current waveform when the control device 100 executes control that does not increase the voltage in the hysteresis interval. FIG. 4B shows a voltage waveform and a current waveform when the control device 100 executes control for boosting the voltage in the entire excitation interval.

As shown in FIG. 4A, when a certain rotor tooth 21 enters a current rising section (predetermined angle range), that is, when an excitation start angle (excitation ON angle) is reached, the control device 100 performs excitation. The start-up of current is started with respect to the coil 12 of the stator tooth 11 as a target. When the rotation angle of the rotor 20 becomes the excitation ON angle based on the signal input from the rotation speed sensor 51, the control device 100 starts to supply current to the target coil 12. In current startup period, the voltage applied to the SR motor 1 is a voltage V ₂ which is boosted by the boosting unit 3. When the rotor teeth 21 enters the hysteresis interval, the controller 100 controls so as not to perform the boosting of the boost unit 3, controls the voltage applied to the SR motor 1 to the voltage V ₁ of the no boost. When a voltage is applied to V ₁ of the no boost, rate of rise of current is smaller than the case of applying the voltage V ₂ after boosting. When the control is executed, the current change in the hysteresis interval becomes gentler than the current change in the current rising interval. The current change in the hysteresis section shown in FIG. 4A is more gradual than the current change in the hysteresis section shown in FIG. As a result, it is possible to suppress the steep slope of the current waveform in the hysteresis interval, and it is possible to reduce the number of times of switching due to the gradual change slope. Further, when the rotor tooth 21 enters the current falling section, that is, when the excitation end angle (excitation OFF angle) is reached, the control device 100 is applying to the coil 12 of the stator tooth 11 to be excited as described above. Start to lower the current. In current standing down period, the control device 100 controls so as to apply a negative voltage (magnitude of the absolute value is boosted voltage V ₂₎ to the SR motor 1.

  As shown in FIG. 4B, when the voltage is boosted in the entire excitation interval, the current change becomes steep in the hysteresis interval. Further, since the current change is steep, switching is performed a plurality of times within the hysteresis interval. The current rising section and the current falling section are the same as those shown in FIG.

Here, the control device 100, hysteresis section in accordance with a predetermined excitation conditions, and is configured to selectively control the application of a voltage V ₁ of the no boost, and a control for applying a voltage V ₂ after boost Explain the technical significance. FIG. 5 is a map showing the characteristics of the SR motor 1. As shown in FIG. 5, when the rotational speed of the SR motor 1 is high, the torque that can be output is smaller than the rated torque. That is, when a large required power is obtained at a high rotational speed, the voltage applied to the SR motor 1 needs to be boosted. If the required power is increased during such high-speed rotation, and if the above-described control that does not increase the voltage in step S6 is executed, as shown by the broken line in FIG. The actual current value becomes small. In this case, the intended excitation current does not flow through the SR motor 1, and the intended magnetic attractive force is not generated. That is, the torque corresponding to the torque command value (target torque) is not output from the SR motor 1, and there is a possibility that the output will be insufficient. FIG. 6 is a diagram for explaining a voltage waveform and a current waveform when the necessary boosting is not performed in the hysteresis interval. The voltage waveform and current waveform shown by the solid line in FIG. 6 are the same as those in FIG.

  As described above, in the switched reluctance motor control apparatus according to the present embodiment, the applied voltage is controlled in the hysteresis section in the excitation section according to a predetermined excitation condition when there is no boost and when there is a boost. Can do. Thereby, the magnitude | size of the applied voltage in a hysteresis area is controlled appropriately. Thus, when control is performed in which the applied voltage is not increased in the hysteresis interval, a rapid change in current can be suppressed, and fluctuations in the radial component (radial force) of the magnetic attractive force can be suppressed. Since the radial force becomes a vibration generating force in the SR motor 1, vibration and noise can be reduced by executing control that does not increase pressure in the hysteresis section as described above.

  Note that the control device 100 may be configured to execute the control flow shown in FIG. 7 as a modified example of the control flow shown in FIG. 3 described above. Note that steps S11 to S14 and S17 to S19 shown in FIG. 7 are the same as steps S1 to S7 shown in FIG. As shown in FIG. 7, when determining the hysteresis interval in step S <b> 14, control device 100 applies it to SR motor 1 at the time of current rise (current rise interval) and at the time of current fall (current fall interval). It is determined whether or not voltage boosting is necessary (step S15). If it is determined affirmative in step S15 that voltage boosting is required at the time of current rise (current rise interval) and at the time of current fall (current fall interval), the process proceeds to step S17. On the other hand, when it is determined negative in step S15 because voltage boosting is not necessary at the time of current rise (current rise interval) and at the time of current fall (current fall interval), control device 100 causes current rise. In the rising section and the current falling section, the control not to boost the voltage in the boosting unit 3 is executed (step S16), and this control routine is finished.

[Applicable vehicles]
Moreover, although the case where the SR motor 1 is mounted on a vehicle as a driving source for traveling has been described above, there are application examples 1 to 7 shown in FIGS.

[Application Example 1]
FIG. 8 is a skeleton diagram showing the vehicle of the first application example. The vehicle 200 of the application example 1 includes an engine 201, wheels 202, a transmission (T / M) 203, a differential gear 204, a drive shaft 205, and an SR motor 1 as a driving power source. . The vehicle 200 is a four-wheel drive vehicle, and the engine 201 drives the left and right front wheels 202FL and FR, and the SR motor 1 as a rear motor drives the left and right rear wheels 202RL and RR.

  The engine 201 is a well-known internal combustion engine. In the front side drive device of the vehicle 200, the engine 201 is connected to the left and right drive shafts 205, 205 via a transmission 203 and a differential gear 204. The transmission 203 is, for example, a stepped or continuously variable automatic transmission or a manual transmission. One of the left and right drive shafts 205, 205 is connected to the left front wheel 202FL, and the other is connected to the right front wheel 202FR. Front wheels 202FL and 202FR are driven by output torque (engine torque) of engine 201. The vehicle 200 according to the application example 1 may include a motor generator (MG) that drives the front wheels 202FL and FR in addition to the engine 201.

  The SR motor 1 is a so-called in-wheel motor, and is provided for each of the left and right rear wheels 202RL and 202RR. In the rear side drive device of vehicle 200, left rear SR motor 1RL is connected to left rear wheel 202RL, and right rear SR motor 1RR is connected to right rear wheel 202RR. The rear wheels 202RL and 202RR can rotate independently of each other. The left rear wheel 202RL is driven by the output torque (motor torque) of the left rear SR motor 1RL. The right rear wheel 202RR is driven by the output torque (motor torque) of the right rear SR motor 1RR. Each SR motor 1RL, 1RR is connected to a battery (B) 4 via an inverter 2 and a booster 3. The SR motor 1 functions as an electric motor by the electric power supplied from the battery 4, and functions as a generator that converts torque (external force) transmitted from the rear wheels 202RL and 202RR into electric power. The inverter 2 includes an electric circuit for the left rear SR motor 1RL and an electric circuit for the right rear SR motor 1RR.

  The control device 100 controls the SR motors 1RL and 1RR and the engine 201. For example, the control device 100 includes an SR motor control unit (SR motor ECU) and an engine control unit (engine ECU). In this case, the engine ECU executes engine torque control for adjusting the output torque of the engine 201 to a target torque value by intake control, fuel injection control, ignition control, and the like. The SR motor ECU executes motor control for each of the SR motors 1RL and 1RR based on a signal input from the rotation speed sensor 51. The rotation speed sensor 51 includes a left rear rotation speed sensor 51RL that detects the rotation speed of the left rear SR motor 1RL, and a right rear rotation speed sensor 51RR that detects the rotation speed of the right rear SR motor 1RR.

[Application Example 2]
FIG. 9 is a skeleton diagram illustrating a vehicle according to the second application example. Unlike the application example 1, the vehicle 200 of the application example 2 is provided with the SR motor 1 on all the wheels 202. In the description of the application example 2, the description of the same configuration as the application example 1 described above will be omitted, and the reference numerals thereof will be cited.

  As shown in FIG. 9, the SR motor 1 includes four in-wheel motors SR motors 1FL, 1FR, 1RL, 1RR on the front, rear, left and right sides. The left front motor 1FL is connected to the left front wheel 202FL and drives the left front wheel 202FL. The right front motor 1FR is connected to the right front wheel 202FR and drives the right front wheel 202FR. The left rear motor 1RL is connected to the left rear wheel 202RL and drives the left rear wheel 202RL. The right rear motor 1RR is connected to the right rear wheel 202RR and drives the right rear wheel 202RR. Each SR motor 1FL, 1FR, 1RL, 1RR is electrically connected to a battery 4 via an inverter 2 and a booster 3.

  The rotation speed sensor 51 includes a left rear rotation speed sensor 51RL, a right rear rotation speed sensor 51RR, a left front rotation speed sensor 51FL that detects the rotation speed of the left front motor 1FL, and a right front rotation that detects the rotation speed of the right front motor 1FR. Number sensor 51FR is included. Each rotation speed sensor 51FL, 51FR, 51RL, 51RR outputs a resolver signal to the control device 100.

  The control device 100 controls each SR motor 1FL, 1FR, 1RL, 1RR. Control device 100 determines a motor torque command value for each SR motor 1FL, 1FR, 1RL, 1RR based on the driver's required torque. The control device 100 controls the applied voltage of each SR motor 1FL, 1FR, 1RL, 1RR so as to obtain an excitation pattern according to the rotational speed of each SR motor 1FL, 1FR, 1RL, 1RR and the motor torque command value.

[Application Example 3]
FIG. 10 is a skeleton diagram illustrating a vehicle according to the third application example. The vehicle 200 of the application example 3 is a modification of the application example 1 and the application example 2 described above. Unlike the application example 1, for example, the arrangement of the driving devices is reversed in the front and rear directions. In the vehicle 200 of the application example 3, the SR motor 1 drives the left and right front wheels 202FL and 202FR, and the engine 201 drives the left and right rear wheels 202RL and 202RR. In the description of the application example 3, the description of the same configurations as those of the application example 1 and the application example 2 described above is omitted, and the reference numerals thereof are cited.

  As shown in FIG. 10, in the front side drive device of vehicle 200, left front SR motor 1FL is connected to left front wheel 202FL, and right front SR motor 1FR is connected to right front wheel 202FR. In the rear drive device of the vehicle 200, the engine 201 is connected to the left rear wheel 202RL and the right rear wheel 202RR via a transmission 203, a differential gear 206, and left and right drive shafts 207 and 207.

[Application Example 4]
FIG. 11 is a skeleton diagram illustrating a vehicle according to the fourth application example. The vehicle 200 of the application example 4 is a modification of the application example 1 described above, and unlike the application example 1, is a rear wheel drive vehicle that is not provided with a front side drive device. That is, in the application example 4, unlike the application examples 1 to 3 described above, the driving power source of the vehicle 200 is only the SR motor 1 as an in-wheel motor. In the description of the application example 4, the description of the same configuration as that of the application examples 1 to 3 described above is omitted, and the reference numerals thereof are cited.

  As shown in FIG. 11, in the vehicle 200, the left and right front wheels 202FL, 202FR are driven wheels. The control device 100 executes traveling control so as to satisfy the torque requested by the driver by the output torque from each SR motor 1RL, 1RR included in the rear side drive device. For example, it is possible to execute control for controlling distribution between the output torque of the left rear SR motor 1RL and the output torque of the right rear motor 1RR. In this case, the motor torque command value may be equally distributed to the left and right SR motors 1RL and 1RR.

[Application Example 5]
FIG. 12 is a skeleton diagram illustrating a vehicle according to the fifth application example. The vehicle 200 of the application example 5 is a modification of the application example 4 described above, and the driving power source is only the SR motor 1 as in the application example 4. Unlike the application example 4, the SR motor 1 is an in-wheel motor. is not. In the description of the application example 5, the description of the same configuration as that of the application examples 1 to 4 described above is omitted, and the reference numerals thereof are cited.

  As shown in FIG. 12, the vehicle 200 of the application example 5 includes only one SR motor 1 as a driving power source, and the SR motor 1 drives the left and right rear wheels 202RL and 202RR. The SR motor 1 is connected to the left rear wheel 202RL and the right rear wheel 202RR via a differential gear 206 and left and right drive shafts 207, 207.

  The control device 100 calculates a motor torque command value of the SR motor 1 that can satisfy the required torque based on the required torque of the driver. For example, the control device 100 determines the motor torque command value of the SR motor 1 based on the reduction ratio of the differential gear 206 so that the total shaft torque of the rear wheels 202RL and 202RR is equal to the required torque.

[Application Example 6]
FIG. 13 is a skeleton diagram showing the vehicle of the application example 6. The vehicle 200 of the application example 6 is a modification of the application example 1 and the application example 5 described above, and unlike the application example 5, the configuration of the application example 1 is mounted as a front side drive device. In the description of the application example 6, the description of the same configuration as that of the application examples 1 to 5 described above is omitted, and the reference numerals thereof are cited.

  As shown in FIG. 13, vehicle 200 includes a front side drive device including engine 201 and a rear side drive device including SR motor 1 as a rear motor. In the front drive unit, the engine 201 is connected to the left and right drive shafts 205 and 205 via a transmission 203 and a differential gear 204. In the rear drive apparatus, the SR motor 1 is connected to the left rear wheel 202RL and the right rear wheel 202RR via a differential gear 206 and left and right drive shafts 207, 207.

[Application Example 7]
FIG. 14 is a skeleton diagram illustrating a vehicle according to the seventh application example. The vehicle 200 of the application example 7 is a modification of the application example 3 and the application example 4 described above. For example, the application example 7 is different from the application example 3 in that the rear side drive device is not provided, or unlike the application example 4, the arrangement of the drive devices is reversed in the front and rear directions. In the description of the application example 7, the description of the same configuration as the application examples 1 to 6 described above will be omitted, and the reference numerals thereof will be cited.

  As shown in FIG. 14, the vehicle 200 of the application example 7 is a front-wheel drive vehicle. In the front side drive device, SR motors 1FL and 1FR that are in-wheel motors drive the left and right front wheels 202FL and 202FR.

1 Switched reluctance motor (SR motor)
2 Inverter 3 Booster 4 Battery 10 Stator 11 Stator Teeth 12 Coil 20 Rotor 21 Rotor Teeth 51 Rotational Speed Sensor 100 Control Device

Claims (1)

The control apparatus switches reluctance motor connected to the battery and electrically via the inverter and the boost unit,
In the hysteresis section between the current startup period and the current falling down section in the excitation interval within a determination unit configured to determine a voltage to be applied to the switched reluctance motor whether the need for pressurizing raising the booster,
When the it is determined boost in Ri by the determining means and said hysteresis interval is not required, only performs boosting of the voltage applied by the booster with the current start-up period and the current standing down period, and before Symbol Hysteresis and control means for executing control not to perform step-up of the applied voltage by the boosting unit in the section,
When the determination means determines that boosting in the hysteresis interval is necessary, the control means applies the boosting unit in all excitation intervals of the current rising interval, the hysteresis interval, and the current falling interval. Execute control to boost voltage
Controller of switched reluctance motor, wherein the this.

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