Energy Saving Using Variable Frequency Drive In Industry: A Review

In this paper variable frequency drive is discussed and also application, advantages and the cost discussed. Numerous industrial uses necessitate variable fluid flow control. (air, chemical gases, water and liquid chemicals). Since most drives run at part load the majority of the time, the cumulative energy savings, or the accompanying financial benefit, may be significant over time. Given the prevalence of this form of fluid flow control in industry, widespread use of variable-frequency drives with power electronics can contribute significantly to energy savings. The conventional approach to this type of flow control involves using a 50-Hz power source and an induction motor running at a constant speed to control the flow. When run at variable speed using a VFD, many fixed-speed motor load applications that are powered directly from AC line power can reduce their energy consumption. These energy cost savings are particularly useful in uses for variable-torque centrifugal fans and pumps, where the torque and power of the load change in proportion to the square and cube, respectively, of the speed. In comparison to fixed-speed operation, this change results in a significant power reduction for a relatively minor drop in speed. Additionally, a large amount of power is saved by using a variable frequency drive to regulate the fluid flow while the throttle is completely open. This paper's primary goal is to implement a VFD to properly regulate flows while reducing energy consumption.