感应电荷准静法计算杆塔模型的冲击响应与NEC 2的计算结果基本一致。
The strike response calculated by quasi-steady induced charge method agrees basically with the results calculated by method of NEC-2.
感应电机采用传统的硬起动会给定子的转矩和电流带来较大冲击，故需研究电机的软起动过程。
The soft start-up process of electronic induction motor is studied in order to avoid the enormous impulsion to its starting stator current and torque brought by direct start.
软启动器可以限制感应电机的起动电流及起动转矩，减少了电机起动过程中对电网的冲击，延长了电气设备和机械结构的使用寿命。
Soft-starter can limit the start current and torque of the induction-motor, reduce the influence to the power circuit in the starting process, and prolong electrical equipments' working life.
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