Patent ID: 6608403
Filing Date: 2003-08-19
Classification: H02J

Abstract:
A power supply system comprising:a plurality of power supplies which are connected in parallel for outputting a voltage; a plurality of power sources, each of said power sources is directly coupled in series with a corresponding one of said power supplies to provide a voltage to operate said corresponding one of said power supplies, wherein there are said power supplies which are not directly coupled in series with said power sources; and a control module coupled between said plurality of power sources and said respective power supplies which are not directly coupled in series with said respective power sources, for creating a conductive path to transfer a voltage from one of said power sources excluded from those power sources which are interrupted in providing voltages, to operate said power supplies, wherein said control module further comprises: a first relay circuit coupled in series with one of said power sources for receiving a voltage from one of said power sources and transmitting said voltage; a second relay circuit coupled in series with one of those power sources which are not directly coupled in series with said first relay circuit for receiving a voltage from one of those power source and transmitting said voltage; and a plurality of third relay circuits, each of which is coupled with said first relay circuit and said second relay circuit and one of those power supplies which are not directly coupled in series with said power sources, and is configured to be switched in accordance with a zero-crossing point of the voltages from said power sources, for alternatively creating a conductive path in response to a control signal to provide either the voltage being transferred from said first relay circuit or the voltage being transferred from said second relay circuit to one of said power supplies which are not directly coupled in series with said respective power sources.