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Motor Speed Control

Motor Speed Control in Action - Pumping The Dock Dry

Ralspeed Ltd are one the largest manufacturers and distributors of motor speed controllers in the United Kingdom.

What is Motor Speed Control?

Motor speed control uses AC drives, also known as variable speed drives (VSD) and variable frequency drives (VFD) to control the speed on a electrical motor.

Obviously, a fixed speed is not suitable for all processes in all circumstances; thus, the need for adjusting the speed according to need.

Industrial machinery is often driven by electrical motors that have provisions for speed adjustment. Such motors are simply larger, more powerful versions of those driving familiar appliances such as food blenders or electric drills. These motors normally operate at a fixed speed.

If speed control is required, that controller is called a (variable speed) AC drive. AC drives are used in a wide variety of industrial applications. To give an easy example, AC drives are often used with fans to provide adjustable airflow in large heating and air conditioning systems. The flow of water and chemicals in industrial processes is often controlled by adjusting the speed of pumps.

However, variable speed AC drives are commonly used in more complex and difficult environments such as water and wastewater processing, paper mills, tunnel boring, oil drilling platforms or mining.

View case studies of motor speed controllers in action.

  • Danfoss Vacon 100 GP 0.75kW-160kW
  • VersiStart Range
  • Torq-Master Soft Starter With Fitted Bypass Contactor 75-110kW
  • Danfoss Vacon 10 Compact 0.25kW-5.5kW
  • 3 Pole Contactor 11kW - 15kW
  • Variable Speed Drive Panel 185-200kW for Hire
  • IP54 Soft Starters 22Kw to 90Kw
Page updated 4th Feb 2019, 09:02
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Ralspeed Ltd.: Safe contractor approved, ISO 9001 registered firm, Partner of Vacon, driven by drives, authorised service center
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