DC power supply apparatus

摘要

A DC power supply apparatus includes a charging circuit, which charges a secondary battery of a vehicle from an AC power source device or a DC power source device. The charging circuit includes a non-insulating converter circuit and an insulating converter circuit. A breaker relay disconnects the AC power source device and the charging circuit in an initial charging period to supply a large charging current to the secondary battery by the non-insulating converter circuit. As a result, charging can be performed with high efficiency without the insulation transformer. The breaker relay connects the AC power source device and the charging circuit after the initial charging period. Only the insulating converter circuit supplies the charging current to the secondary battery. Thus, adverse effect of stray capacitance of a circuit of the vehicle can be eliminated.

主权项

1. A DC power supply apparatus for converting power supplied from a power source device including a commercial power line system and supplying DC power to a load device, the DC power supply apparatus comprising:
a conversion circuit configured to supply the DC power and including an insulating transformer, the conversion circuit being switchable to operate as a non-insulating converter circuit, in which an input and an output is not insulated by the insulating transformer, or as an insulating converter circuit, in which the input and the output are insulated by the insulating transformer; and a breaker device for shutting off power supply from the commercial power line system to the non-insulating converter circuit, when the conversion circuit supplies the DC power by the non-insulating converter circuit.