![]() In line with the VFD working principle, the electronic controller alters the voltage frequency sent to the induction motor. But if the voltage frequency you supplied is lower than 50 Hz, the motor operates slowly. However, if the input voltage you use exceeds 50 Hz, the engine runs faster than the rated speed. It implies that when you apply a voltage of 50Hz to an AC motor, the motor operates at a rated speed. You should note that the AC motor alternates its speed by changing the voltage frequency used to run it. What is the VFD Circuit, and How Does it Operate?Īs mentioned above, the Variable Frequency Drive makes an AC motor specification work at variable speeds. Here, we explore the concept of the VFD bridge circuits, the different sections, types of VFD, and their advantages and disadvantages. Generally, the three major components of a VFD schematic are the rectifier, the DC link, and an inverter. Simply put, they are motor controllers that regulate the frequency and voltage served to the electric motor, based on its specific requirements. Its primary use is to manage the speed of an AC motor. ![]() VFD is the abbreviation for Variable Frequency Drive, also called Variable Speed Drives and Inverters. ![]() Every electronic enthusiast has come across the term VFD.
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