同步电机变频起动策略研究

Research on variable-frequency startup for synchronous motor

较大容量的同步电机起动时,由于起动电流过大,会引起电网电压下降,从而影响其它用电设备正常工作,因此一般较大容量的同步电机起动时都要采用一些辅助措施。在介绍同步电机主要特性的基础上,详细论述了变频起动技术在同步电机起动过程中的原理、方式和效果,从而体现出变频起动在改善同步电机起动电流和转矩方面的优越性。

The impact on power grid and the bypass equipment which generates by exeessive surge current when synchronous motor starts directly, so startup of the larger capacity synchronous motor usually should adopt complementary measures. The main characteristics of synchronous motor is introduced, and the principle, method and effect of variable-frequeney technology used in the startup of synchronous motor are also discussed in detail. Accordingly, it incarnates the superiority of variable-frequency startup in the aspect of improving the start current and torque of synchronous motor.