Jan 11, 2019
Frequency converter (VFD) is a kind of power control equipment which USES frequency conversion technology and microelectronic technology to control ac motor by changing the working power frequency of the motor.
The frequency converter is mainly composed of rectifier (ac to dc), filter, inverter (dc to ac), brake unit, drive unit, detection unit and micro-processing unit. Inverter on the internal IGBT off to adjust the output power supply voltage and frequency, according to the actual needs of the motor to provide its required power supply voltage, and then to achieve the purpose of energy saving, speed regulation, in addition, the inverter has a lot of protection functions, such as over-current, over-voltage, overload protection and so on. With the continuous improvement of industrial automation, frequency converter has been widely used.