发明授权
- 专利标题： Power supply device with smoothing capacitor and falling voltage chopper circuit
- 专利标题（中）： 具有平滑电容器和降压斩波电路的电源装置
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申请号： US13422418申请日： 2012-03-16
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公开(公告)号： US08976558B2公开(公告)日： 2015-03-10
- 发明人: Go Kato , Takuro Hiramatsu , Kenji Sakai , Chikako Katano , Hiroshi Takenaga , Tomoaki Shimizu
- 申请人： Go Kato , Takuro Hiramatsu , Kenji Sakai , Chikako Katano , Hiroshi Takenaga , Tomoaki Shimizu
- 申请人地址： JP Kanagawa
- 专利权人： Toshiba Lighting & Technology Corporation
- 当前专利权人： Toshiba Lighting & Technology Corporation
- 当前专利权人地址： JP Kanagawa
- 代理机构： DLA Piper LLP (US)
- 优先权： JP2011-151975 20110708
- 主分类号： H02M7/217
- IPC分类号： H02M7/217 ; H05B33/08
摘要：
According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to an output voltage to the load is provided in a rectified half period of the alternating-current power supply. The falling voltage chopper circuit includes at least one switching element configured to receive an input of the voltage after smoothing, operate in a section where the voltage after smoothing exceeds the output voltage, and pause in a section of the output voltage and a second capacitor provided on an output side and having a capacity larger than the capacity of the first capacitor.
公开/授权文献
- US20130010509A1 POWER SUPPLY DEVICE 公开/授权日：2013-01-10
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