| CPC H02J 9/063 (2020.01) [H02J 3/32 (2013.01); H02J 3/38 (2013.01)] | 16 Claims |
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1. A power supply device, comprising:
a plurality of first power conversion devices to convert power supplied from a plurality of power supply sources, respectively, into DC power;
at least one second power conversion device to convert the DC power into driving power to supply to a load;
a first circuit breaker disposed between a first power end, to which an output end of one of the plurality of first power conversion devices is connected to enable input and output of the DC power, and a bus line connected to the first power end such that the DC power flows therethrough;
a second circuit breaker disposed between the first power end and a second power end, to which an output end of remaining first power conversion devices of the plurality of first power conversion devices and an input end of the at least one second power conversion device are connected, to connect or disconnect the first power end and the second power end to or from each other, and
a control unit configured to control the power supply device such that:
wherein the first circuit breaker is opened or closed depending on a state of at least one of the DC power, the driving power, the plurality of first power conversion devices, and the load, to connect or disconnect the DC power between the first power end and the bus line, and
wherein the second circuit breaker is opened or closed depending on a state of at least one of the DC power, the driving power, the plurality of first power conversion devices, and the load, to connect or disconnect the DC power between the first power end and the second power end.
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