The Intelligent Electromagnetic Switch Bounce Suppression and Holding Process Collaborative Optimization Control Strategy

This paper designs an intelligent control module with STM32F103 microcontroller as the core, aiming at the 400A unipolar electromagnetic switch developed by our research team. This module has realized the joint optimization of bounce suppression of the closing process, adaptive adjustment of closing time, collaborative optimization of the holding process reliability and energy-saving operation. Firstly, the step control strategy is adopted to effectively shorten the contact bounce time. Secondly, the dynamic iron displacement observer is constructed to successfully realize the adaptive switching of closing and holding processes. In addition, a collaborative optimization strategy based on the change of current slope is proposed for the characteristic difference of different reaction spring. This strategy optimizes the electromagnetic suction force by automatically adjusting the holding current, realizing reliable and energy-saving operation. Experimental verification confirms the effectiveness of bounce suppression and collaborative optimization strategies.