PWM Converter is synonym of Active Front-end Converter. As the PWM Converter is connected at the input side (front side) of the AC drive, it is also known as an Active Front-end Converter.
Active Front-end Converter is used to improve the power quality by improving the power factor to unity (also settable) and reduced current harmonics at input side. Also, it allows bi-directional power flow; the excess energy can be feedback to the grid (regenerative braking) rather than dissipating in resistors.
Axpert-i-Sine Active Front-end Converter (AFC) is an intelligent device, which reduces the harmonics and improves the power factor of utility side. Axpert-i-Sine is the best solution for the applications which requires dynamic braking. It helps to save energy by feeding the excess energy back to the grid.
Axpert-i-Sine AFC can be used with AC drive(s) for the mitigation of harmonic. It can be used for multiple drives also.
some of the unique features of Axpert-i-Sine Active Front-end Converter are as under.
Very Fast Response
Low current THD at input side
Selectable Power Factor at input side
Bi-directional Power Flow for regenerative braking
Built-In Energy Meter
Operates with closed loop control for best accuracy
Total 80-Character, 4-Line LCD panel with backlit
Modbus-RTU Connectivity for Networking
Advanced programmable digital I/O interface
Low Input current Harmonics and improved Power Factor
The Axpert-i-Sine Active Front-end Converter actively controls the input current THD and power factor regardless of motor speed and percentage of rated load. Even if supply voltage distortion is 5% the supply side performance is good. The performace of Axpert-i-Sine is less affected by supply voltage harmonic distortion.