In view of the impact damage of the medium and high voltage asynchronous motor starting to the electric power sys?tem, the mechanical transmission device and the motor itself, and based on the analysis of the basic principle of motor soft starting, the power electronic technology and microcomputer control technology are applied to design the switch transformer medium and high voltage asynchronous motor soft?starting equipment. The structure and function of the device are introduced, and the key meth?ods of the zero cross signal detection, high voltage thyristor trigger, torque ripple in the initial stage of isolation starting, motor power?factor angle, starting under heavy loading and processing method with large motor power are proposed. The actual industrial applica?tion test results show that the equipment has the expected soft starting performance and wide application prospect.
NETL
NSTL
维普
万方数据
