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2. 发明公开

EP0055903A1 An electrical power supply 有权
标题翻译：电力供应。
公开(公告)号：EP0055903A1
公开(公告)日：1982-07-14
申请号：EP81305862.5
申请日：1981-12-14
申请人： WEBSTER ELECTRIC COMPANY, INC.
发明人： Francis, Ralph M. Jr.,
IPC分类号： H02M3/315
CPC分类号： H02M3/315
摘要： A power supply circuit comprises: an input choke (30) having one end connected to one side (28) of a DC supply source connection from a bridge (20); a transformer (34); and a circuit loop connected between another end of said input choke (30) and another side (38) of said DC supply source connection. This circuit loop includes a series connection of a capacitor (36), a switching device (44) and a primary winding (32) of the transformer (34). The switching device (44) includes a controlled conduction path and a control input (49) for rendering the conduction path conductive. The capacitor (36) is arranged to be charged primarily by the DC supply source bridge (20). There is provided a resistive-capacitive trigger circuit (54, 56, 58) connected between the DC supply source bridge (20) connection and the control input (49) for repetitively rendering the switching device (44) conductive at a predetermined repetitive rate so as to repetitively discharge the capacitor (36) through the primary winding (32). The transformer (34) includes a secondary winding (64) and has a predetermined turns ratio between the secondary winding (64) and the primary winding (32). The power supply circuit further comprises output circuit means (72, 78) for rectifying and filtering the output of the secondary winding (64) to provide the output of the power supply circuit.

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