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1. (WO2015043237) SURGE PROTECTION CIRCUIT FOR PFC CIRCUIT

Pub. No.:    WO/2015/043237    International Application No.:    PCT/CN2014/079980
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Jun 17 01:59:59 CEST 2014
IPC: H02H 9/02
Applicants: ZTE CORPORATION
中兴通讯股份有限公司
Inventors: HUANG, Qian
黄潜
ZUO, Zhiling
左志岭
YUAN, Yongfeng
苑永峰
Title: SURGE PROTECTION CIRCUIT FOR PFC CIRCUIT
Abstract:
A surge protection circuit for a PFC circuit. An L line and an N line of an alternating-current power supply are connected to the positive electrode of a PFC capacitor (C1) by means of a high-voltage diode module. A current limiting apparatus (RT1) is connected between the high-voltage diode module and the positive electrode of the PFC capacitor (C1). The surge protection circuit can provide surge protection for a PFC circuit and a post-stage circuit thereof, in particular for a PFC circuit with a middle/small alternating-current power supply. With a current limiting apparatus, the instantaneous energy impact is limited, so that the PFC capacitor (C1) is not easy to be damaged, and residual voltage energy can be effectively absorbed, thereby providing a clamping function.