One of the main methods for electric motor energy saving is to use frequency conversion speed control technology and the principle is adjusting the speed by changing the motor power frequency. This technology is widely used in energy saving of fan and pump loading equipment because the power consumption of the fan and pump loading is proportional to the cube of the speed.
（1） Frequency converter is used for the energy-saving renovation of fans, pumps and other equipment. By changing the motor speed, it can control the fan air flow or pump flow to meet the needs of the production process, so that the operating power will be in the best state.
（2） This technology can eliminate the energy loss of the original use of damper baffle or valve regulation mode to achieve energy saving.