通过朗日万定理计算固态软起动网压降

Calculation of net voltage drop of solid motor soft starting by Langevin's theorem

论证了固态降压软起动执行器件的电力器件均可以等效为纯感抗,指出在软起动过程中该等效感抗值会随网压而调节。这些都使固态起动网压降计算复杂化,尤其是在事先已带有其它负载的情况下。通过朗日万定理计算固态软起动网压降具有概念清楚、结果明晰的优点。利用推导相关的计算公式,演示例算结果。

It is proved that the electrical device and executer of solied soft starter is equivalent to a reactance. Its value is adjustable. Therefore, the calculation of net voltage drop is quite complicated. On the basis of the Langevin＇s theorem, the calculation task can be completed successfully, no matter whether the net power system is loaded with other loads in advance. Some calculating examples are attached.