Harmonic Reduction in Three-Phase Boost Converter with Six Harmonic Injected PWM

6고조파 주입 PWM을 이용한 3상 승압형 컨버터 고조파저감

In this paper, six harmonic injection PWM method for reducing total harmonic distortion in single switch three phase discontinuous conduction mode boost converter is presented. In the proposed method, periodic six harmonic voltage is injected in the control circuit to vary the duty ratio of the converter switch within a line cycle so that the fifth order harmonic of the input current is reduced. Experimental results are verified by converter operating at 400V/6kW with three phase 140V~220V input.