Dual voltage DC generator for compact light-weight ship electrical systems

This paper proposes a dual voltage DC (DVDC) generation architecture for `Integrated Power System (IPS)´ able to provide substantial size and weight reductions. The system uses an open-winding synchronous generator with a medium voltage (MV) active rectifier placed at one end and a low voltage (LV) active rectifier at the other. The two rectifiers are controlled to create a medium-voltage dc bus to feed the propulsion and pulsed weapon loads, and a low voltage DC bus for ship service needs. This architecture derives appropriate voltages for the propulsion and ship service loads from the shared generator while completely eliminating the need for transformers. This paper presents the voltage regulation technique for both medium-voltage and low voltage dc buses. It also discusses the fault management strategy.