What is a variable speed drive?

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A variable speed drive (VSD) regulates the speed or torque output of an AC electric motor. There are several different names that variable speed drives are commonly referred to including: frequency converters, variable frequency drives, AC drives, inverter drives and adjustable speed drives.

Why use a VSD?

There are numerous reasons for adjusting the speed of an application:

  • Save energy and improve efficiency of systems
  • Match the speed of the drive to the process requirements
  • Improve the working environment
  • Reduce mechanical stress on machines
  • Lower noise levels, for example on fans and pumps

How do I chose a VSD?

Check out our other article ‘How to choose the right AC inverter drive’ for all the things you should consider when choosing a variable speed drive.

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