具有储能释能模式的接触器去磁控制模块设计

Demagnetization Control Module With Energy Storage/Release Mode Design for Contactor

该文提出具有双向储能、释能工作模式的馈能去磁方案,设计可级联的控制模块实现大容量智能接触器动作过程中的电磁能量闭环管理。释能模式通过控制线圈去磁速率,实现触头分断速度的在线调节,适应不同的分断电流等级,减小电弧能量对触头的侵蚀;采用重复激磁控制,抑制触头分断反弹危害;储能模式实现电流闭环控制的同时,对吸合切换过程中回馈的多余磁能进行有效利用。构建两种工作模式的小信号模型,进行补偿网络设计,验证控制方案的稳定。

The scheme that energy regeneration for demagnetization with energy storage and energy release working mode was proposed. With this scheme, the cascade control module realized closed-loop management of the electromagnetic energy of intelligent large capacity contactor. By the energy release mode, demagnetization rate was controlled to adjust opening speed on line. The opening speed adapted to different levels of breaking current in order to reduce arc-damage for the contact. With exciting control again when opening, contact rebound restraints was done. By the energy storage mode, redundant magnetic energy was reclaimed and effectively used when closing switching process, meanwhile the coil current was under closed loop control. In order to verify stability of module, the small signal models of two working modes were built for compensation net design. And detail of the control principle analysis was given with co-simulation model. The experiment validates the control scheme, which has theoretical and practical significance for large capacity breaking intelligent control.