基于双向TVS的电磁阀加速释放电路研究

Accelerated Release Circuit of Solenoid Valve Based on Bidirectional TVS

摘要:

为了解决某型号姿轨控发动机关闭响应性能不满足指标的问题,对影响发动机关闭响应性能的因素及电磁阀驱动电路进行了分析,提出了增加外部释放电阻法和基于双向TVS的两种电磁阀加速释放电路。通过仿真分析与试验验证,采用基于双向TVS的电磁阀加速释放电路不仅可以提高电磁阀的关闭响应速度,减小电磁阀的关闭响应时间；还能够有效地抑制电磁阀关断时产生的反向电动势,对驱动电路具有良好的保护作用。该电路已在多个型号姿轨控发动机电磁阀驱动电路中得到应用,并参加了全系统热试车及飞行试验,取得了良好的效果。

Abstract:

To solve the problem that the closing response of a certain type of divert and attitude control motor didn"t meet the target, the factors affecting the response performance of engine shutdown and the driving circuit of solenoid valve is analyzed in this paper. Two accelerated release circuits of solenoid valve based on adding external release resistance and bidirectional TVS are proposed. Through simulation analysis and experimental verification, the results show that the improved bidirectional TVS circuit has the fastest response to electromagnetic valve closing. It can effectively control the reverse electromotive force produced when the solenoid valve is turned off, and meet the overall target. This circuit has been widely applied in the driving circuit of attitude and orbit control engines, and has participated in the whole system hot test and flight test, and achieved good results.