Patent ID: 8710783
Filing Date: 2014-04-29
Classification: F01P,G05B,H01M,H02P,Y02E

Abstract:
1. A motor control system comprising: a host controller for controlling a wheel driving unit of a vehicle, wherein electric power supply to the controller is halted when an ignition switch is OFF; and a motor control device for receiving a PWM command signal from the host controller and for controlling a motor of a cooling blower to cool a power supply unit supplying electric power to the wheel driving unit, wherein the host controller modulates a duty ratio of pulses of the PWM command signal by a target rotating speed of the motor, modulates a period of the pulses of the PWM command signal by a continuous operation time of the motor, and transmits the modulated PWM command signal to the motor control device; and the motor control device demodulates the received PWM command signal to reconstruct both the target rotating speed and the continuous operation time, controls a rotating speed of the motor based on the target rotating speed, and controls the motor to halt rotation when a signal-unreceiving time period of the PWM command signal becomes larger than the continuous operation time.