Information Sheet #7 - Variable Frequency Drive Applications & Explanations.

Information Sheet #7 - Variable Frequency Drive Applications & Explanations.

1.0 Introduction:

Variable Frequency Drive, usually using the acronym VFD, refers to the technology for fine control of motors with an electro-mechanical drive system. VFD has two principal benefits, first a more efficient way to start and ramp up an electric motor, and secondly a method for finely controlling motor speed and/or movement with a wide range of systems, including but not limited to, continuous manufacturing process, industrial and commercial machinery and water-treatment plants. While the technology is not new, the advancements in digital switching technology has greatly accelerated the use of the VFD.

2.0 Explanation of VFD Technology:

The primary purpose of a VFD is precise control of electric motor speed. With a VFD, a system designer can precisely control ramp up and ramp down speed to ensure all the components within a process are coordinated and operate efficiently in sync. Without a VFD an AC electrical mechanical device, such as a constant electric motor, just runs up to constant speed as current is applied and while doing so consumes up to 7-times the running amps required, to overcome starting torque. Prior to the application of VFD, motors would have to be connected to various mechanical components such as gears.

Continue Reading






Also in Information Sheet Blog

Information Sheet #12 - Preventive Maintenance of Electric Motors and Benefits
Information Sheet #12 - Preventive Maintenance of Electric Motors and Benefits
This information sheet discusses the benefits of PM and PdM programs, what the programs comprise, and the components tested and method of testing.

View full article →

Information Sheet #11 - Brownouts & The Adverse Effect On Electric Induction Motors.
Information Sheet #11 - Brownouts & The Adverse Effect On Electric Induction Motors.

This information sheet discusses the adverse effect brownouts have on electric motors, particularly induction motors and how to manage them.

View full article →

Information Sheet #10 - UL Rebuilt Equipment Certification, Programs and Green Construction Initiatives.
Information Sheet #10 - UL Rebuilt Equipment Certification, Programs and Green Construction Initiatives.

This information sheet discusses how a rebuilt product uses best practices to ensure rebuilt equipment certification programs address both green construction and safety concerns.

View full article →