Variable Frequency Drive Circuit Diagram. Rectifier section of vfd circuit rectifier section uses 6 diodes. It takes fixed voltage and frequency from ac input and converts it to a variable voltage and frequency ac output.
Vfds are also knows as variable speed drive ac drive adjustable speed drive and adjustable frequency drive. A basic pwm voltage controller circuit could be experienced in the diagram provided below. Therefore in vfd voltage applied to motor is also reduced with frequency to prevent the motor from being damaged by excessive current.
The supply voltage applied to the rectifier is a three phase alternating voltage or a single phase ac voltage with a frequency of 50 hz or 60 hz.
Vfds are also knows as variable speed drive ac drive adjustable speed drive and adjustable frequency drive. Vfd is a short form of variable frequency drive or variable voltage variable frequency drive the vfds are working based on changing the input frequency and input voltage of the motor we can change the speed of the. So the term vfd stands for variable frequency drive as the same suggest that it plays with the frequency and voltage of the power system in order to control the speed of a motor. A vfd circuit consists of three parts.
