| 摘要 |
PURPOSE: A motor driving system of a parallel type hybrid electric vehicle and a driving method thereof are provided to improve safety and reliability of the motor by duplicate a hole sensor signal by using a signal of a crank shaft sensor for detecting a position of a crank shaft directly coupled with the motor although a hole sensor gets out of order. CONSTITUTION: A motor driving system drives a motor in a parallel type hybrid electric vehicle which includes a rotating shaft of the motor and a crank shaft of an engine which are directly coupled with each other. The motor driving system includes a plurality of hole sensors(40A,40B,40C), a crank shaft sensor(60), a current controller(70), and an encoder(80). The hole sensors detect rotor positions in accordance with each phase of the motor. The crank shaft sensor detects a rotational position of the crank shaft. The current controller controls a driving speed and a torque of the motor according to a current control signal from an MCU(Motor Control Unit). The encoder applies the phase voltage to the motor according to a gating signal of the current controller and includes a gate driver for performing the gating according to the position information of the rotor of each phase. The encoder analyzes a signal from the crank shaft sensor when the hole sensor malfunctions and outputs a duplicate of the position of each phase of the motor.
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