How to Soft Start Single-phase 220 Volt Motor

The soft start methods of single-phase motor mainly include step-down, phase shift and frequency conversion. Among them, autotransformer multi-tap step-down is commonly used, which can not only meet the needs of starting different loads, but also obtain larger starting torque. Phase-shifting uses the principle of SCR phase-shifting and voltage-regulating to realize motor voltage-regulating starting, which has good starting effect but high cost. The frequency converter adjusts the speed and torque of the motor by changing the frequency of the power grid. It is a motor control device with the highest technical content, the most complete control function and the best control effect in the field of modern motor control.