一种永磁单线圈脱扣器的设计与实现

Design and Implementation of a Permanent-Magnetism Shunt Release Based on Unicoil

介绍了一种利用电压型单电磁线圈驱动的永磁脱扣器的优化设计方案。与常规永磁型相比,这种脱扣器采用了内置储能弹簧驱动动铁心结构,动铁心在完成机械动作输出时仅需为电磁线圈提供一个小容量的电压信号作为释放储能弹簧的触发即可。也正是因为储能弹簧的原因,动铁心的动能输出便逃离了对电磁线圈的工作电源能量及稳定性的依赖,进而稳定了脱扣器的输出机械性能,提高了用分励脱扣器作配套电器设备的动作可靠性。同时,由于这个电压型电磁线圈的工作全过程只需单一方向的毫安级电流,故电磁线圈驱动电路设计时仅采用一个中功率开关管及其偏置元件搭建,为其配套电器提供了稳定可靠的低成本选型方案。

This paper presented a design optimization of a permanent magnetism tripping device based on voltagesingle electromagnetic coils. Kinetic energy is derived from the energy-storage springs that is placed in the interior of the movable iron-core,which is different from the conventional permanent-magnetism tripping device. The mechanical driving stability of the movable iron-core is not dependent on the voltage source of the electromagnetic coil,and the main reason is because of the full release of the spring and the spring energy. Because this shunt release device has good mechanical properties,the mechanical stability of the device is reliable when the whole set of electrical equipment is used as auxiliary components. The technical scheme of driving shunt release circuit is composed of a power switch tube and a few peripheral components,because the electromagnetic coil requires only a milliamperes level unidirectional current drive circuit,so the cost is very low while the performance is stable and reliable.