变频器是把工频电源（50Hz或60Hz）变换成各种频率的交流电源，以实

The frequency converter is a device that converts the power frequency power supply (50Hz or 60Hz) into AC power of various frequencies to realize the variable speed operation of the motor. The control circuit completes the control of the main circuit, and the rectifier circuit converts the AC power into DC power. The circuit smoothes the output of the rectifier circuit, and the inverter circuit reverses the direct current into alternating current. For inverters such as vector control inverters that require a lot of calculations, sometimes a CPU for torque calculation and some corresponding circuits are also required. Frequency conversion speed regulation is to achieve the purpose of speed regulation by changing the frequency of the motor stator winding power supply.

The inverter is the frequency supply (50Hz or 60Hz) into a variety of frequency AC power supply, in order to achieve the motor's variable speed operation of the equipment, wherein the control circuit to complete the control of the main circuit, the rectification circuit will ac cesa into DC, DC intermediate circuit to the output of the rectification circuit smooth filtering, the inverter circuit will DC re-inverted into AC. For drives such as vector-controlled drives that require a lot of computation, sometimes a CPU for torque calculations and some corresponding circuits are required. Variable frequency speed control is achieved by changing the frequency of power supply to the motor stator winding.

The frequency converter is a kind of equipment that transforms the power frequency power (50Hz or 60Hz) into AC power of various frequencies to realize the variable speed operation of the motor, in which the control circuit completes the control of the main circuit, the rectifier circuit transforms the alternating current into the direct current, the DC intermediate circuit smoothly filters the output of the rectifier circuit, and the inverter circuit reverses the direct current into the alternating current. For the inverter which needs a lot of calculation, such as vector control inverter, sometimes it needs a CPU for torque calculation and some corresponding circuits. Variable frequency speed regulation is achieved by changing the frequency of motor stator winding power supply.