Induction Motor Reducing Voltage Energy-Saving Control Method Based on Closed-Loop Power Factor

Abstract

The paper starts from the angle of the induction motor energy loss, antis light-load energy conservation issues for induction motor, proposes a closed-loop control method of the motor power factor which is the amount of system feedback, and gives the constraint condition of the reducing voltage energy-saving. Different loads have different values of the optimal motor power factor, real-time adjusting the motor power factor to make the motor always run at the optimal power factor, and when running at light load, reducing the output voltage of the inverter, to reduce the motor copper loss and iron loss, to improve motor efficiency and power factor, to achieve reducing voltage energy-saving purposes, and to achieve the function of induction motor load following energy-saving. The experimental results show that the motor is able to maintain a high power factor operation in light load conditions, and has a good energy-saving effect.