What is a Frequency Converter? And how it functions?
From the induction motor's inception, variable frequency operation has existed in the form of the alternating current (AC) generator. The frequency produced by a generator may be altered by adjusting its rotating speed. One of the few ways to adjust motor speed before the development of high-speed transistors, frequency modifications were restricted since slowing the generator decreased the output frequency but not the voltage. A little down the road, we'll examine why this matter. Variable speed pumping applications used to be far more difficult to implement in our field than they are now. One of the more straightforward approaches was to use a multi-pole motor with switches that could control the proportion of the stator's poles that were actually being used. The switches allowed both manual and sensor-based control of the rotational speed. This technique is still widely used in many variable flow pumping applications. Pool pumps, cooling tower fan and pump systems, and h...