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Vehicle cooling-fan motor/inverter system, control method therefor, and program therefor

  • US 10,050,577 B2
  • Filed: 08/29/2013
  • Issued: 08/14/2018
  • Est. Priority Date: 02/22/2013
  • Status: Expired due to Fees
First Claim
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1. A vehicle cooling-fan motor/inverter system that controls a three-phase motor that drives a cooling fan for supplying air to an in-vehicle heat exchanger, comprising:

  • a motor control device that has a switching element, that converts DC power supplied from a high-voltage power supply into three-phase AC power, and that supplies the three-phase AC power to the three-phase motor;

    a communication driver that is activated by using power supplied from a low-voltage power supply and that exchanges information, via a vehicle network, with a second control unit that is mounted in a vehicle and that is on a superordinate side to the vehicle cooling-fan motor/inverter system;

    an isolation unit that electrically isolates a low-voltage system to which power is supplied from the low-voltage power supply from a high-voltage system to which power is supplied from the high-voltage power supply;

    a PWM driver that is activated by using power supplied from the low-voltage power supply, and that receives a PWM signal from a channel different from the vehicle network and outputs a rotation-speed instruction for the three-phase motor; and

    a first control unit that obtains a rotation-speed instruction for the three-phase motor via the PWM driver and the communication driver and that controls the motor control device based on the obtained rotation-speed instruction for the three-phase motor,wherein, if a fault in the switching element is detected, the first control unit outputs fault information notifying that there is a fault in control of the three-phase motor to the second control unit via the communication driver.

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