Abstract
The discontinuous conduction mode (DCM) operation of front-end diode bridge rectifier used in three-phase AC-to-DC resonant converter is presented. High-frequency triangular current is injected from the output of the three-phase inverter to the input of front-end diode bridge rectifier. Hence, high power-factor operation of the converter is achieved by modulating the input voltage to the front-end rectifier. A detailed operation of the converter along with operating waveforms and modes of operation is discussed. Analysis of DCM operation of the front-end rectifier is carried out. The different design curves and switching stresses are plotted for the design of the converter. Finally, to validate the analytical and simulation predictions experimental results on laboratory set-up of 3 kW, 1000 V are presented.
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