DC POWER SUPPLY APPARATUS
First Claim
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.
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Accused Products
Abstract
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.
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Citations
20 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A DC power supply method for supplying a secondary battery of a vehicle with DC power to charge the secondary battery by a conversion circuit, which includes an insulating transformer for insulating primary side and a secondary side thereof and converts power of a DC power source device and a commercial AC power source device, the DC power supply method comprising:
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checking whether the secondary battery is to be charged; setting the conversion circuit to operate as a non-insulating converter circuit, in which the insulating transformer is inoperative, when the secondary battery is determined to be charged; disconnecting the non-insulating converter circuit and the AC power source device from each other, when the conversion circuit is set to operate as the non-insulating converter circuit, charging the secondary battery initially by using only the DC power of the DC power source device by only the non-insulating converter circuit of the conversion circuit; checking whether a predetermined switch-over condition is satisfied, the predetermined switch-over condition indicating that the secondary battery has been charged initially; setting the conversion circuit to operate as an insulating converter circuit, in which the insulating transformer is operative, after the predetermined switch-over condition is satisfied; connecting the insulating converter circuit and the AC power source device, when the conversion circuit is set to operate as the insulating converter circuit; and charging the secondary battery by using only the insulating converter circuit of the conversion circuit. - View Dependent Claims (20)
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Specification