Patent ID: 9653947
Date: 2017-05-16
CPC Classifications: H02J

Claim:
1. An electric power converter comprising: a power failure detection circuit connected to a plurality of power supply systems, for detecting a power failure state of each of the plurality of power supply systems; a first switch unit having a plurality of contact points connected to the plurality of power supply systems and one output terminal, and when said power failure detection circuit detects a power failure of at least one of the plurality of power supply systems, the first switch unit performs switching so as to connect to the output terminal of the contact point connected to one of the power supply systems other than the power supply system having the detected power failure, in accordance with a power failure detection result of said power failure detection circuit; a second switch unit having a charging circuit for inhibiting an inrush current from the plurality of power supply systems and one input terminal connected to the output terminal of said first switch unit, and said second switch unit performs switching so as to connect the input terminal to a contact point on an input side of the charging circuit for a predetermined duration of time in synchronization with the switching among the power supply systems by said first switch unit; and an electric power conversion circuit connected to the output terminal of said second switch unit.