浅谈异步电动机的过负荷保护

Discussion on overload protection of induction motor

根据电动机的发热特性 ,提出以一种比较接近电动机实际发热曲线的热过载反时限方程及实现方法 ,使电动机充分发挥过载能力的同时免于损坏 。

A thermal overload inverse time equation that is quite close to the real thermal locus of motor and its implementation method are proposed based on the thermal characteristic of motor. This can bring the overload capability of motor into full play and at the meantime it can protect the motor from damage. Therefore, the reliability of the power drawing system and continuity of production can be improved.