Patent ID: 9444356
Filing Date: 2016-09-13
CPC Classification: H02J,H02M

Claim Text:
1. A power supply device comprising: a plurality of power supply units capable of supplying power to a load, wherein power is supplied to the load by a first power supply unit that is one of the plurality of the power supply units, wherein each of the power supply units includes: a pulse generating unit configured to generate a pulse voltage having a pulse width corresponding to a voltage and current to be output; a feedback control unit configured to perform a feedback control of the pulse voltage, which is output from the pulse generating unit, so that the current flowing in the load reaches a prescribed value; and an abnormality detection unit configured to detect an occurrence of an abnormality in the corresponding power supply unit, wherein when the occurrence of the abnormality in the first power supply unit is detected by the abnormality detection unit of the first power supply unit, the first power supply unit stops the supply of power to the load, and a second power supply unit that is one of the plurality of the power supply units and is different from the first power supply unit starts the supply of power to the load, and wherein a cycle of the feedback control of the second power supply unit is set to a second cycle shorter than a first cycle that is a cycle of the feedback control set to the first power supply unit.