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1. WO2020063652 - PFC OVERCURRENT PROTECTION CIRCUIT, AND CONTROLLER

Publication Number WO/2020/063652
Publication Date 02.04.2020
International Application No. PCT/CN2019/107772
International Filing Date 25.09.2019
IPC
H02H 3/087 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
08responsive to excess current
087for dc applications
H02H 3/06 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
02Details
06with automatic reconnection
CPC
H02H 3/066
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection
02Details
06with automatic reconnection
066Reconnection being a consequence of eliminating the fault which caused disconnection
H02H 3/087
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection
08responsive to excess current
087for dc applications
Applicants
  • 杭州先途电子有限公司 HANGZHOU LEADERWAY ELECTRONICS CO., LTD [CN]/[CN]
Inventors
  • 吕勇松 LV, Yongsong
  • 王祺 WANG, Qi
Agents
  • 北京集佳知识产权代理有限公司 UNITALEN ATTORNEYS AT LAW
Priority Data
201811144713.X29.09.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) PFC OVERCURRENT PROTECTION CIRCUIT, AND CONTROLLER
(FR) CIRCUIT DE PROTECTION CONTRE LES SURINTENSITÉS PFC, ET DISPOSITIF DE COMMANDE
(ZH) 一种PFC过流保护电路及控制器
Abstract
(EN)
The present application provides an overcurrent protection circuit and a controller. The overcurrent protection circuit comprises a sampling circuit, a comparator circuit, a D flip-flop, and an output signal control circuit. The sampling circuit samples a current of a branch circuit being controlled, obtains a sample signal, and outputs the sample signal to the comparator circuit. The comparator circuit compares the sample signal against a reference signal, generates an overcurrent signal if the sample signal is greater than the reference signal, and outputs the overcurrent signal to the D flip-flop. The D flip-flop receives the overcurrent signal, generates a first voltage level signal according to the overcurrent signal, and outputs the first voltage level signal to the output signal control circuit. The output signal control circuit receives the first voltage level signal, and outputs, in response to the first voltage level signal, a control signal for reducing the current of the branch circuit under control. The circuit achieves fast overcurrent protection by means of the D flip-flop, thereby improving protection reliability.
(FR)
La présente invention porte sur un circuit de protection contre les surintensités et sur un dispositif de commande. Le circuit de protection contre les surintensités comprend un circuit d'échantillonnage, un circuit comparateur, une bascule D et un circuit de commande de signal de sortie. Le circuit d'échantillonnage échantillonne un courant d'un circuit de dérivation commandé, obtient un signal d'échantillon et émet le signal d'échantillon vers le circuit comparateur. Le circuit comparateur compare le signal d'échantillon à un signal de référence, génère un signal de surintensité si le signal d'échantillon est supérieur au signal de référence, et émet le signal de surintensité vers la bascule D. La bascule D reçoit le signal de surintensité, génère un premier signal de niveau de tension en fonction du signal de surintensité, et émet le premier signal de niveau de tension vers le circuit de commande de signal de sortie. Le circuit de commande de signal de sortie reçoit le premier signal de niveau de tension, et émet, en réponse au premier signal de niveau de tension, un signal de commande pour réduire le courant du circuit de dérivation commandé. Le circuit permet d'obtenir une protection rapide contre les surintensités au moyen de la bascule D, ce qui permet d'améliorer la fiabilité de protection.
(ZH)
本申请提供了一种过流保护电路及控制器,该过流保护电路包括采样电路、比较电路、D触发器和输出信号控制电路;所述采样电路用于采样被控支路的电流,得到采样信号,并将所述采样信号输出至所述比较电路;所述比较电路对所述采样信号和基准信号进行比较,当所述采样信号大于所述基准信号时,生成过流信号,并将所述过流信号输出至所述D触发器;所述D触发器接收所述过流信号,并根据所述过流信号生成第一电平信号,并将所述第一电平信号输出至所述输出信号控制电路;所述输出信号控制电路接收所述第一电平信号,响应于所述第一电平信号输出使被控支路的电流减小的控制信号。该电路通过D触发器快速实现过流保护,提高保护可靠性。
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