Electric vehicles based on selective harmonic elimination type variable voltage variable frequency speed regulation system

Selective harmonic elimination technique applied in 83C552 single chip microcomputer and the large capacity storage 27PC040 as the core of electric motor variable voltage variable frequency speed regulation system. Through adjustment to control signal, the system can realize variable voltage and frequency, voltage, frequency stabilization of the closed-loop control. The control rule is determined by the selective harmonic elimination technique, can eliminate more low order harmonics by low switching frequency, make the VWF system obtain the sine wave of perfect quality. This system effectively implements the variable voltage variable frequency speed regulation and improve the performance of the electric vehicles.