Variable frequency drive
Variable frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's operating power supply. The frequency converter mainly consists of rectifier (AC to DC), filter, inverter (DC to AC), braking unit, driving unit, detection unit, microprocessor unit, etc.
The frequency converter adjusts the voltage and frequency of the output power supply by breaking the internal IGBT, providing the required power voltage according to the actual needs of the motor, thereby achieving energy conservation and speed regulation. In addition, the frequency converter also has many protection functions, such as overcurrent, overvoltage, overload protection, and so on.
With the continuous improvement of industrial automation, inverter is widely used in industrial automation, machinery manufacturing, power electronics and other fields, such as air conditioning load, crusher load, compressor load, rolling mill load and so on. Through the frequency converter, the motor is precisely controlled, the production process is optimized, and energy saving is realized.
