Sep 13, 2018
The frequency converter is usually divided into four parts: rectifier unit, high capacitance, inverter and controller.
Rectifier unit: converts alternating current with fixed working frequency into direct current.
High capacity capacitance: storage of converted electrical energy.
Inverter: an electronic switch composed of a high-power switching transistor array converts direct current into square waves of different frequencies, widths and amplitudes.
Controller: it works according to the set program, controls the amplitude and pulse width of the output square wave, makes the alternating current superimposed as the approximate sine wave, and drives the ac motor.