发明名称 |
SNUBBER CIRCUIT |
摘要 |
An embodiment of a snubber circuit that absorbs a surge voltage generated in a transformer of a switching power supply, comprises a diode, a zener diode electrically connected to the diode, and a first capacitor electrically connected to the zener diode. The diode, the zener diode, and the first capacitor are serially connected such that, at occurrence of the surge voltage, the diode operates in a forward direction and the first capacitor is charged with the surge voltage via a breakdown voltage of the zener diode, and the diode has reverse recovery time that is longer than a half of a cycle of a ringing voltage generated in a winding of the transformer and is in a range of 125 ns to 7 μs. |
申请公布号 |
US2016276923(A1) |
申请公布日期 |
2016.09.22 |
申请号 |
US201514970742 |
申请日期 |
2015.12.16 |
申请人 |
SANKEN ELECTRIC CO., LTD. |
发明人 |
HAYAKAWA Akira;SHIMADA Masaaki;IKEDA Koji |
分类号 |
H02M1/34;H02M3/335 |
主分类号 |
H02M1/34 |
代理机构 |
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代理人 |
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主权项 |
1. A snubber circuit that absorbs a surge voltage generated in a transformer of a switching power supply, the snubber circuit comprising:
a diode; a zener diode electrically connected to the diode; and a first capacitor electrically connected to the zener diode, wherein the diode, the zener diode, and the first capacitor are serially connected such that, at occurrence of the surge voltage, the diode operates in a forward direction and the first capacitor is charged with the surge voltage via a breakdown voltage of the zener diode, and the diode has reverse recovery time that is longer than a half of a cycle of a ringing voltage generated in a winding of the transformer and is in a range of 125 ns to 7 μs. |
地址 |
Niiza-Shi JP |