Motor drive apparatus, hybrid vehicle drive apparatus using the same, and computer readable recording medium recorded with program for causing computer to perform control of motor drive apparatus
First Claim
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1. A motor drive apparatus, comprising:
- a first inverter driving a first motor;
a second inverter driving a second motor;
a DC power supply outputting a DC voltage;
a voltage converter boosting and supplying the DC voltage from said DC power supply to said first and second inverters, and down-converting and supplying the DC voltage from said first or second inverter to the side of said DC power supply;
a relay connected between said DC power supply and said voltage converter;
an electric load connected between said relay and said voltage converter; and
a control device cutting off said relay and switching control of said voltage converter to voltage step-down control in response to detection of a fault in said DC power supply.
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Abstract
Upon detection of a fault in a DC power supply based on a voltage from a voltage sensor or a temperature from a temperature sensor, a control device controls inverters to cause AC motors to output zero output torque, and generates and outputs signals to a voltage step-up converter and a DC/DC converter, respectively. The control device generates and outputs a signal SE of an L level to system relays to cut off the system relays. Thereafter, the control device generates and outputs a signal PWMDL to the voltage step-up converter to switch control of the voltage step-up converter to voltage step-down control.
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Citations
15 Claims
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1. A motor drive apparatus, comprising:
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a first inverter driving a first motor; a second inverter driving a second motor; a DC power supply outputting a DC voltage; a voltage converter boosting and supplying the DC voltage from said DC power supply to said first and second inverters, and down-converting and supplying the DC voltage from said first or second inverter to the side of said DC power supply; a relay connected between said DC power supply and said voltage converter; an electric load connected between said relay and said voltage converter; and a control device cutting off said relay and switching control of said voltage converter to voltage step-down control in response to detection of a fault in said DC power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A hybrid vehicle drive apparatus for driving a hybrid vehicle, comprising:
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an internal combustion engine; a first motor connected to said internal combustion engine; a second motor; and a motor drive apparatus driving said first and second motors, said motor drive apparatus including a first inverter driving said first motor, a second inverter driving said second motor, a DC power supply outputting a DC voltage, a voltage converter boosting and supplying the DC voltage from said DC power supply to said first and second inverters, and down-converting and supplying the DC voltage from said first or second inverter to the side of said DC power supply, a relay connected between said DC power supply and said voltage converter, an electric load connected between said relay and said voltage converter, and a control device cutting off said relay and switching control of said voltage converter to voltage step-down control in response to detection of a fault in said DC power supply, said control device driving said first and second inverters so as to drive said second motor by electric power generated by said first motor in accordance with a running mode of said hybrid vehicle.
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10. A computer readable recording medium recorded with a program for causing a computer to perform control of a motor drive apparatus in the event of a fault in a DC power supply,
said motor drive apparatus including a first inverter driving a first motor, a second inverter driving a second motor, said DC power supply outputting a DC voltage, a voltage converter boosting and supplying the DC voltage from said DC power supply to said first and second inverters, and down-converting and supplying the DC voltage from said first or second inverter to the side of said DC power supply, a relay connected between said DC power supply and said voltage converter, and an electric load connected between said relay and said voltage converter, said program causing the computer to perform a first step of detecting a fault in said DC power supply, a second step of cutting off said relay in response to detection of the fault in said DC power supply, and a third step of switching control of said voltage converter to voltage step-down control in response to cutting off of said relay.
Specification