CONTROL METHOD FOR SYNCHRONISATION AND PHASE SHIFT OF THE PULSE WIDTH MODULATION STRATEGY OF POWER CONVERTERS

摘要

A phase shift at a pulse width modulation mode of an electric power inverter and synchronization control method is provided to offset one or more unnecessary harmonic in a supply network voltage by supplying a switching period of a pulse width modulation mode at each network bridge using a different time offset related to time reference. A phase shift at a pulse width modulation mode of an electric power inverter and synchronization control method comprises the followings: a supply network; a plurality of electric power inverter(1a, 1b, 1c) which is connected to AC(Alternating Current) bus bar; and a network bridge(14) causing one or more unnecessary harmonic in a supply network voltage. The electric power inverter operates according to the pulse width modulation mode having the same switching period.