Patent ID: 6815843
Filing Date: 2004-11-09
Classification: H02J,H02M

Abstract:
A power supply device comprising a plurality of power supply units and a main control unit,each of said power supply units comprising: a main power supply unit generating a load voltage supply to be supplied to a load; a main power supply control unit to activate/inactivate generation of a load voltage supply by the main power supply unit and to monitor output of the main power supply unit; a unit side control section unit monitoring the main power supply control unit and sending operational signals to the main power supply control unit; a control power supply unit generating a first controlling voltage to the main power supply unit, a second controlling voltage to control the unit side control section unit, and a third controlling voltage to the main control unit; and a converting unit being inserted in an upstream side of the unit side control section unit, converting the second controlling voltage into a constant controlling voltage, and supplying the constant controlling voltage to the unit side control section unit, wherein the control power supply units included in the plurality of power supply units constitute a parallel redundancy structure providing power to each unit side control section unit of the plurality of power supply units through the converting unit, and the converting unit also converts the second voltage supplied from another control power supply unit in the plurality of power supply units.