Pulse width modulation method by spatial voltage vector method

摘要

The present invention relates to a pulse width modulation method using a space voltage vector method, and more particularly, to a pulse width modulation method using a spatial voltage vector method, comprising: constructing eight voltage vectors in which vector states of output voltages from three butter butter are arranged in a vector space according to states of respective phases; Calculating a three-phase reference phase voltage applied to each phase of an external circuit having a three-phase input stage 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 to synthesize an actual reference voltage vector to be applied to the external circuit; And applying a difference between each virtual switching time to each of the external circuits by taking each voltage vector as a switching time. Thereby, a pulse width modulation method which can be implemented simply while maintaining the excellent performance of modulation by the conventional spatial voltage vector method is provided.