POWER INTERRUPTING DEVICE

摘要

A power interrupting device has: an output terminal connected to a load; interruption circuits connected in parallel between a power source and the output terminal; and a control device controlling each interruption circuit. Each interruption circuit has: a switch element connected between the power source and an intermediate node, and ON/OFF controlled by an interruption signal output from the control device; and a rectifier connected such that a forward direction thereof is from the intermediate node to the output terminal. The control device sets the interruption circuits as a diagnosis target circuit in turn. The control device sets the interruption signal output to each interruption circuit such that the switch element of the diagnosis target circuit is OFF. Moreover, the control device determines, based on a voltage of the intermediate node of the diagnosis target circuit, whether an abnormality occurs in the diagnosis target circuit.

主权项

1. A power interrupting device comprising:
an output terminal connected to a load; a plurality of interruption circuits connected in parallel between a power source and the output terminal; and a control device to control each of the interruption circuits, wherein each of the interruption circuits comprises:
a switch element connected between the power source and an intermediate node, and ON/OFF controlled by an interruption signal output from the control device; anda rectifier connected such that a forward direction thereof is from the intermediate node to the output terminal, wherein the control device sets the interruption circuits as a diagnosis target circuit in turn, the control device sets the interruption signal output to each of the interruption circuits such that the switch element of the diagnosis target circuit is OFF, and the control device determines, based on a voltage of the intermediate node of the diagnosis target circuit, whether or not an abnormality occurs in the diagnosis target circuit, and wherein when interrupting power supply to the load, the control device sets the interruption signal such that the switch element is OFF in all of the interruption circuits.