EMC Performance Analysis and Countermeasure of Electric Actuator Control System - Electrical Fast Transient/burst Problem Solving

Aiming at electromagnetic compatibility problem caused by harsh electromagnetic environment of industrial process control on Intelligent Electric actuator control system, common types of interfaces received by intelligent electric actuators are discussed and corresponding countermeasures are proposed. Based on the international standard IEC 61000-4, an intelligent electric actuator of a certain type on the market was studied and tested. Results show that EFT / b (Electrical Fast Transient / Burst) interference is main cause of electric actuator failure, EFT / B interference threshold voltage is obtained by Gamma model. Hardware filtering and limiting filtering deal with EFT / B interference problem, and finally the tested device passes test.