Understanding the Basics and Benefits of Variable Frequency Drives (VFD)

Variable Frequency Drives (VFD) are actually a motor controller responsible for driving an electric motor. This is accomplished by varying both the voltage and frequency applied. Because the frequency has a direct link to the speed at which the motor operates, also referred to as RPMs, the faster the frequency, the faster the RPMs.

In the event that the full speed of the motor is not required, the Variable Frequency Drive works by reducing voltage and frequency so that the speed requirements of the motor’s load are met. There are a number of benefits that go hand in hand with using this type of motor controller.

• Energy Consumption and Costs – A VFD helps reduce energy consumption and cost. As mentioned, if the full speed is not required for a certain application, energy consumption is less and energy costs decrease. Today, over 65% of all power consumption in industry comes from electric motor-type systems. By optimizing these with a VFD or even upgrading an existing VFD, energy consumption would be cut by up to 70%. Obviously, when less energy is used, the cost goes down.
  
• Improved Production – Variable Frequency Drives also improve the quality of the finished product while reducing operating costs. Especially in a world where the end-user demands perfection, having the opportunity to produce a much higher-quality product for less money is extremely beneficial for all parties.
  
• Tax Incentives and Rebates – It is quite common to see tax incentives coming from the government and rebates from utility companies for manufacturers who follow more energy-efficient practices. With the installation of a VFD, people can take advantage of these perks, which bolsters the return on investment. Original Source...

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