一种简单可靠的机载功率驱动电路设计
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摘要
飞机机电系统中存在大量的功率继电器和接触器,机载计算机驱动这些负载需要功率控制装置和过流保护装置。传统的驱动和保护电路设计,使用机载断路器或小型继电器加熔断丝实现。断路器和继电器本身存在机械动作次数有限,响应速度较慢,平均寿命较低的缺点。近些年出现的固态功率控制器,通过反延时保护算法,实现了过流保护的快速控制。但固态功率控制器需软件实现反时限保护算法,硬件电路实现较复杂,降低了产品的可靠性。针对此问题,该文基于电流控制器芯片,采用MOS管实现功率驱动和过流保护,该电路结构简单,可靠性高,过流保护时间可调。经试验验证,该电路能够很好地实现功率驱动和过流保护,具有重要的应用价值。
There are a large number of power relays and contactors in airborne electromechanical system, airborne computers drive the loads need power control devices and overcurrent protection devices. The traditional methods use circuit breakers or small relays with fuse. Both circuit breakers and relays have limited action times, slow response speed and short service life. The SolidState Power Controller(SSPC) realizes fast overcurrent protection with the inverse time algorithm. However, the inverse time algorithm needs software and complicated hardware circuits, which decreases products reliability. In order to solve this problem, this paper adopts MOS-FET to realize power drive and overcurrent protection based on current controller chip. This scheme has simple circuit structure, high reliability and configurable overcurrent protection time. The experiments show that designing circuit can realize the power driver and overcurrent protection and it has important application value.
There are a large number of power relays and contactors in airborne electromechanical system, airborne computers drive the loads need power control devices and overcurrent protection devices. The traditional methods use circuit breakers or small relays with fuse. Both circuit breakers and relays have limited action times, slow response speed and short service life. The SolidState Power Controller(SSPC) realizes fast overcurrent protection with the inverse time algorithm. However, the inverse time algorithm needs software and complicated hardware circuits, which decreases products reliability. In order to solve this problem, this paper adopts MOS-FET to realize power drive and overcurrent protection based on current controller chip. This scheme has simple circuit structure, high reliability and configurable overcurrent protection time. The experiments show that designing circuit can realize the power driver and overcurrent protection and it has important application value.
引文
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[3]叶雪荣,郑志洪等.固态功率控制器国内外发展现状[J].电器与能效管理技术,2015,2(6).
[4]潘江江,李海伟等.基于SSPC模块化小型智能配电器设计研究[J].电子测量技术,2016,39(10).
[5]周星星,孙丹丹.固态功率控制器在飞机电气改装中的应用[J].设备管理与改造,2017,30(3).