VOLTAGE VECTOR OVERMODULATION METHOD CONSIDERING COUNTER ELECTROMOTIVE FORCE OF MOTOR

摘要

PURPOSE: The method enables the acquisition of the characteristics of fast speed and torque response in the transient state by overmodulation considering the counter electromotive force of a motor. CONSTITUTION: The method is as for the vector overmodulation as to a voltage applied to the motor in the transient state during the motor driving. The method is characterized by selecting a voltage having the lowest difference between a counter electromotive force component and the order voltage as an applying control voltage of the motor. The method can select the most adjacent voltage necessary for the driving of the motor by selecting the corresponding voltage to correspond to the transient state during the motor driving with the vector overmodulation method considering the dynamic characteristics of the motor. Therefore, the method can operate a current controller(301) and a speed controller of the motor stably and can maximize the application of torque of the motor.