发明授权
- 专利标题: Power source device
- 专利标题(中): 电源设备
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申请号: US42555申请日: 1998-03-17
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公开(公告)号: US6075715A公开(公告)日: 2000-06-13
- 发明人: Minoru Maehara , Masanori Mishima , Naoki Onishi , Yoshinobu Murakami
- 申请人: Minoru Maehara , Masanori Mishima , Naoki Onishi , Yoshinobu Murakami
- 申请人地址: JPX Osaka
- 专利权人: Matsushita Electric Works, Ltd.
- 当前专利权人: Matsushita Electric Works, Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX9-074137 19970326; JPX9-088526 19970407
- 主分类号: H02M1/00
- IPC分类号: H02M1/00 ; H02M1/42 ; H05B41/28 ; H05B41/282 ; H02M5/458 ; H02M7/537
摘要:
A power source device is so constituted that a first capacitor connected across DC output terminals of a rectifier is made to be of a relatively small capacity, a resonance circuit is formed by a primary winding of a transformer and a second capacitor, first and second switching elements connected in parallel to a smoothing capacitor are alternately made ON and OFF to cause currents to flow, a both-end voltage of the first capacitor drops to be substantially close to zero volt even in a period in which a source voltage of an AC power source becomes substantially zero, and an input current can be drawn in smoothly over the entire range of a cycle of the source voltage of the AC power source, whereby higher harmonics of the input current can be reduced, a pulsation of the current flowing to a load can be minimized, and required number of parts for the power source device is reduced to be able to realize circuit simplification and cost reduction.
公开/授权文献
- USD374772S Foot locker 公开/授权日:1996-10-22