Slip power recovery control is a method used to improve the efficiency of AC induction motor drives. In this method, the slip power of the motor is recovered and fed back into the power supply system.
The basic principle of slip power recovery control is to use a power electronic circuit to control the amount of slip power fed back into the power supply system. The power electronic circuit consists of a rectifier, DC link, and inverter. The rectifier is used to convert the AC power from the motor into DC power, which is then stored in the DC link capacitor. The inverter then converts the DC power back into AC power and feeds it back into the power supply system.
The main advantage of slip power recovery control is that it improves the efficiency of the motor by recovering and reusing the slip power. This results in significant energy savings and reduced operating costs. Additionally, slip power recovery control can also help to improve the power factor of the motor, which reduces the overall demand for reactive power in the power supply system.
Slip power recovery control is commonly used in applications where AC induction motors are used, such as in variable speed drives for pumps, fans, and compressors. It is also used in applications where high-power drives are required, such as in the steel and cement industries.
