Torque boosting phenomenon of the inverter - News - Global IC Trade Starts Here.

Probe domestic high frequency needle JKT-50L high frequency needle with 3 probes

Photocoupler

When the inverter operates in the low frequency range, the excitation voltage of the motor decreases and underexcitation occurs. In order to compensate for the underexcitation of the motor, almost all of the inverters are equipped with an automatic short-lifting function, which enhances the torque (U/f characteristic) when the motor is running at low speed. The automatic torque boost includes quadratic decelerating torque load, proportional torque load and constant torque load waiting. No matter which kind of load characteristic, if the torque boost value is too large, an overexcited state will occur in the low speed region, the motor May be hot.