利用L-C串联电路起动和切除交流大电机

将Ｌ－Ｃ串联电路串联在交流大电机进线中，并和压敏电阻配合，可实现交流大电机的平衡降压起动，并在切除交流大电机时，起到了抑制对电网电压的冲击，减小拉弧电压，抑制高次谐波等作用。

串联补偿时用L-C电路起动交流大电机的振动分析

当考虑串联电路补偿线路电压损失时，分析L-C串联谐振电路起动交流大电机^（[1]）方法中，L-C对引起电机自激振动^（[2]）的影响。

Research on the variable speed system of large power alternating current motor

The development status of the variable speed system of large power AC(alternating current)motor drive in China is introduced.The large power AC drive fed by AC-AC converters(cycloconverters)has developed greatly,and some innovations on the theory and engineering technique have been realized.They have been applied to rolling mills,mine hoists,and so on,and remarkable economic and social benefit has been achieved.The development of AC drive fed by large power IGCT(integrated gate commutated thyristors)AC-DC-AC converter is also introduced.It has excellent performance and reliable operation,and has been used in traction.