PWM METHOD USING THE SPACE VOLTAGE VECTOR TYPE

摘要

The present invention relates to a pulse width modulation method using a space voltage vector method, comprising: constructing eight voltage vectors arranged in a vector space according to a state of an output voltage from a three-phase inverter; Calculating a three-phase reference phase voltage applied to each phase of an external circuit having three phase input terminals from a voltage vector; Calculating each virtual switching time at which each reference phase voltage should be applied to each corresponding phase of the external circuit in order to synthesize an actual reference voltage vector to be applied to the external circuit; And taking the difference between each virtual switching time as a switching time for applying each voltage vector to an external circuit. Thereby, a pulse width modulation method is provided which can be easily implemented while maintaining excellent performance of the modulation by the conventional space voltage vector method.