THREE PHASE RECTIFICATION WITH HIGH FREQUENCY PULSES

Abstract

The three phase full bridge thyristor rectifier has drawbacks. The low power factor, the high harmonic content of the dc voltage at high firing angle and the inherent dead time are the main reasons for discomfort. The configuration suggested here offers some remedy for all three disadvantages. High frequency sinusoidal current pulses are delivering the energy from the input to the output here. The paper describes the mode of action of the configuration. Symmetrical components are used for the mathematical analysis. Pulse distribution ensuring unit power factor in the whole operation range is suggested. Diodes are applied for clamping at the end of the paper. This is the simplest realization of the concept.