Controller for an electric four-wheel-drive vehicle
First Claim
1. A controller for an electric four-wheel-drive vehicle which includes an internal combustion engine for giving driving force to wheels of an automobile, a generator connected to the internal combustion engine for outputting DC power by using rotational power of the internal combustion engine, an inverter for directly converting the DC power, which is output from the generator, to AC power, and an AC motor for driving the other wheels by using an output from the inverter, the controller comprising:
- control means for generating desired torque from the AC motor by controlling the inverter,wherein, when the power generated by the generator is larger than the power consumption of the inverter and the AC motor to generate excessive power, said control means consumes the excessive power by increasing a loss in the AC motor.
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Accused Products
Abstract
An object of the present invention is to provide a controller for an electric four-wheel-drive vehicle, which is capable of minimizing torque changes and consuming excessive power even when the excessive power is generated by a generator. A motor control unit causes an AC motor to generate desired torque by controlling an inverter. When the power generated by the generator exceeds the power consumed by the inverter and AC motor to generate excessive power, a current command determination unit in the motor control unit consumes the excessive power by increasing a loss in the AC motor.
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Citations
10 Claims
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1. A controller for an electric four-wheel-drive vehicle which includes an internal combustion engine for giving driving force to wheels of an automobile, a generator connected to the internal combustion engine for outputting DC power by using rotational power of the internal combustion engine, an inverter for directly converting the DC power, which is output from the generator, to AC power, and an AC motor for driving the other wheels by using an output from the inverter, the controller comprising:
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control means for generating desired torque from the AC motor by controlling the inverter, wherein, when the power generated by the generator is larger than the power consumption of the inverter and the AC motor to generate excessive power, said control means consumes the excessive power by increasing a loss in the AC motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A controller for an electric four-wheel-drive vehicle which includes an internal combustion engine for giving driving force to wheels of an automobile, a generator connected to the internal combustion engine for outputting DC power by using rotational power of the internal combustion engine, an inverter for converting the DC power, which is output from the generator, to AC power, power storage means connected between an output section of the generator and an input section of the inverter, and an AC motor for driving the other wheels by using an output from the inverter, the controller comprising:
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control means for generating desired torque from the AC motor by controlling the inverter, wherein, when the power generated by the generator is larger than the power consumption of the inverter and the AC motor to generate excessive power and the generated excessive power cannot be stored in said power storage means, said control means consumes the excessive power by increasing a loss in the AC motor.
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Specification