一种基于动态电弧识别及关断技术的截流型保护电路

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Abstract The traditional output intrinsically safety switching power supplies take some protection measures in the output, such as overvoltage protection, overcurrent protection and short current protection, whose response of dynamic is low and the power is small. Dynamic arc recognition and termination (DART) is a method of transiting the system to a safe state rapidly when the critical parameters of the system exceed the critical value by detecting electrical system faults dynamically. This paper will make DART technology apply to the output intrinsically safety switching power supply. When faults occur, the rate of current conversion detected exceeds the pre-set critical value and the power is cut off immediately. Due to the short response time, the arc energy generated at this time is lower than the minimum ignition energy (MIE), so the power of the output intrinsically safety switching power supply can be further improved. Also a set of protection circuit is designed, and through simulation and experiment, it is further verified that DART technology can improve the output power of the intrinsically safety switching power supply.

Key words： intrinsically safety dynamic arc recognition and termination (DART) rate of current conversion minimum ignition energy protection circuit

Received: 27 December 2018 Published: 16 July 2019

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	Articles by authors
	Meng Qinghai
	Li Shuai
	Jiao Zhengguo

Cite this article:

Meng Qinghai,Li Shuai,Jiao Zhengguo. A cut-off protection circuit based on dynamic arc recognition and termination technology[J]. Electrical Engineering, 2019, 20(7): 23-27.

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http://dqjs.cesmedia.cn/EN/Y2019/V20/I7/23

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