Galvanically Isolated 3 Phase PFC Topologies A Comparative Study of 3 approaches in the range of 3-5kW

This paper presents three topologies of active 3 Phase Power Factor Correction Circuits which satisfy the following basic requirements: (a) near unity Power Factor, (b) Input current harmonics of below 5% THD and 3% SHD, and (c) Isolated DC output from the input utility. The need to satisfy the first 2 requirements is mandatory for compliance to MIL-STD-1399 shipboard power*. The last requirement stems from the application needs. Impinging on the choice of most suitable topology to a given application is considerations of volume, weight and EMC performance. The paper is confined in focus to 3-5kW overall output power. Results presented herein are based mostly on testing of actual hardware.