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11. 发明授权

US5448465A Switching power supply without switching induced spike voltages 失效
标题翻译：开关电源没有开关感应尖峰电压
公开(公告)号：US5448465A
公开(公告)日：1995-09-05
申请号：US111729
申请日：1993-08-25
申请人： Koji Yoshida , Nobuyoshi Nagagata , Takuya Ishii
发明人： Koji Yoshida , Nobuyoshi Nagagata , Takuya Ishii
IPC分类号： H02M3/335
CPC分类号： H02M3/33569 , H02M2001/009
摘要： A switching power supply supplies a regulated output voltage and suppresses spike voltage and spike current generated by a switching action of transformers, and suppresses switching frequency drift due to load variation. Output stability of multi-output design is improved and recovery of rectifying diodes by a current resonance are suppressed. A reduction of noise interference to electronic equipments and power loss in the switching power supply itself results. A series connection of a primary winding of a first transformer and a first switching means, which repeats an on/off action is connected across a d-c power source. A series connection of a second switching means, which repeats an on/off action alternately with the first switching means, and a first capacitor is connected in parallel with the primary winding of the first transformer. A series connection of a primary winding of the second transformer and a second capacitor is connected in parallel with the second switching means. Regulated d-c outputs are taken out from each secondary winding of the transformers through rectifiers/filters. A control circuit supplies on/off signals, which on/off-ratios are varied according to one of the regulated d-c outputs, to the first and the second switching means.
摘要翻译：开关电源提供稳定的输出电压，并抑制由变压器的开关动作产生的尖峰电压和尖峰电流，并抑制由于负载变化引起的开关频率漂移。多输出设计的输出稳定性得到改善，并且抑制了通过电流谐振的整流二极管的恢复。降低对电子设备的噪声干扰和开关电源本身的功率损耗。第一变压器的初级绕组和重复开/关动作的第一开关装置的串联连接跨d-c电源连接。与第一开关装置交替地重复开/关动作的第二开关装置和第一电容器的串联连接与第一变压器的初级绕组并联连接。第二变压器的初级绕组和第二电容器的串联连接与第二开关装置并联连接。通过整流器/滤波器从变压器的每个次级绕组中取出调节的d-c输出。控制电路将开/关信号根据调节的d-c输出之一提供，该开/关信号变化到第一和第二开关装置。

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