Motor drive apparatus
AssigneeToyota Jidosha Kabuhsiki Kaisha
InventorHideaki Yaguchi
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Abstract
A control device generates, upon receiving an instruction to start engine while drive wheels of a hybrid vehicle are driven by a motor generator, a signal to output the signal to a voltage step-up converter, and thereby drives and controls the voltage step-up converter to step up a DC voltage that is output from a battery to a maximum voltage of a motor drive apparatus. Then, the control device generates, when an output voltage of the voltage step-up converter reaches the maximum voltage, a signal to output the generated signal to an inverter. Accordingly, the inverter is driven and controlled to drive motor generator in powering mode.
Claims22
A motor drive apparatus comprising:
- a first drive circuit driving a first motor;
- a voltage converter performing a voltage conversion between a power supply and said first drive circuit;
- and
- a capacitor provided between said voltage converter and said first drive circuit;
- and
- a control device for controlling said first drive circuit and said voltage converter, wherein
- said voltage converter performs a voltage step-up operation of stepping up a power supply voltage to an arbitrary level and outputs the stepped-up voltage, and
- said first drive circuit starts an electric power conversion for driving said first motor in powering mode after said voltage step-up operation is completed, and
- said control device includes:
- a target voltage determination unit for determining a target voltage of said stepped-up voltage based on the number of revolutions of said first motor;
- a voltage conversion control unit receiving the target voltage determined by said target voltage determination unit for controlling said voltage converter such that said stepped-up voltage is equal to said target voltage;
- a determination unit for determining whether or not said stepped-up voltage reaches said target voltage and, when said determination unit determines that said stepped-up voltage reaches said target voltage, generating a signal indicating completion of the voltage step-up operation;
- and
- an electric power conversion control unit for causing said first drive circuit to start an electric power conversion for converting said stepped-up voltage into a drive voltage for said first motor, when said electric power conversion control unit receives said generated signal from said determination unit.
A motor drive apparatus comprising:
- a first drive circuit driving a first motor;
- a voltage converter performing a voltage conversion between a power supply and said first drive circuit;
- a capacitor provided between said voltage converter and said first drive circuit;
- and
- a control device for controlling said first drive circuit and said voltage converter, wherein
- said voltage converter starts a voltage step-down operation for stepping down a voltage supplied from said first drive circuit after said first drive circuit drives said first motor in regenerative mode and stops said first motor, and
- said control device includes:
- an electric power conversion control unit for controlling said first drive circuit such that said first motor is driven in said regenerative mode;
- a target voltage determination unit for determining a target voltage of an output voltage of said voltage converter, based on the number of revolutions of said first motor;
- and
- a voltage conversion control unit receiving the target voltage determined by said target voltage determination unit and generating a signal for controlling said voltage converter such that said output voltage is equal to said target voltage;
- and
- said voltage conversion control unit outputs said generated signal to said voltage converter after said first motor is stopped.
Dependencies are inferred from the claim text.