Maintenance-free brushless drive motor with frequencyinversion, has high start torque and short acceleration time.
免维护高力矩无刷变频电机直接驱动，启动力矩大、加速时间短。
2
Basic principle of speed regulation by frequencyinversion is introduced and its application results in power plant attached to vacuum salt making enterprises is summarized.
介绍了变频调速的基本原理，并对其在真空制盐企业自备电厂中的实际运用效果进行了总结。
3
In order to improve the power parameter further, the intermediate frequencyinversion of an electric voltage power type series resonance and frequency trace technique are adopted.