Experimental Evaluation of a Three-Phase Three-Switch Buck-Type Unity Power Factor Corrector

摘要

In this paper the experimental evaluation of a 5 kW prototype of a three-phase three-switch buck PPC rectifier system is discussed. The basic principle of operation is treated briefly. The switching behavior of the power semiconductors is analyzed experimentally and based on the switching loss data gained thereby the maximum allowable output power of the system is calculated in dependency on the pulse frequency. Furthermore, the system efficiency is estimated. A breakdown of the losses to switching and on-state losses of the power semiconductors gives a basis for the further development of the rectifier system.