Back-up current supply for electrical load has electrical coils contained within cooling fluid bath and second cooling fluid passed between heat exchange surfaces for cooling fluid bath and power semiconductors

摘要

The back-up current supply (1) has a rectifier connected to the AC current supply (2) for charging a storage battery (4) providing a back-up current for the load (6) in conjunction with a DC/AC converter, with electrical coils (8) and power semiconductors (9). The electrical coils are contained in a cooling fluid bath (10), with a second cooling fluid (16) passed between heat exchange surfaces (34) for the first cooling fluid (11) and the power semiconductors.