Motors and Drives

 
 
 

Selecting

 
It is important to select the correct motor before purchasing:
  • Identify the requirements and the conditions under which the machine/application to be powered by the motor will operate. Then match the motor to the application to ensure efficiency and avoid the installation of oversized motors.

Consider Using Variable Speed Drives (VSDs)
  • Fitting VSDs will enables you to control of motor speed in order to match the speed need from the equipment it is driving.
  • A 20% speed reduction can result in a power reduction of close to 50%.
  • VSDs are relatively simple to install or retrofit.

Consider Using Higher Efficiency Motors (HEMs)
  • HEMs can save 3–5% of their running cost on average, compared to previous designs.
  • HEMs are easy to retrofit.
  • The highest efficiency band motors are now labelled 'eff1', and the lower band 'eff3'. Any new motors should be at least 'eff2' and preferably 'eff 1'.
 
 

Motors and Drives

 
 
 
 
 
 

Fact

 
 
 
 
A motor running for 11 hours a day (4,000 hours a year) at a typical commercial or industrial site costs ten times more in electricity than its capital cost.