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Motor Resources
Electric motors make up the largest single category of electricity use in the Pacific Northwest. While most projects reduce motor load by improving downstream efficiencies, motor efficiency upgrades and improved motor management practices can also yield savings.

The U.S. Department of Energy's Advanced Manufacturing Office (AMO) has published A Sourcebook for Industry on Improving Motor and Drive System Performance. AMO's motor systems website also includes other resources and tip sheets.

Green Motors
When a motor fails, the user or owner faces three choices: Rewind to a lower efficiency, rewind and maintain the original efficiency, or replace it with a new motor. Purchasing a new NEMA Premium motor will result in the highest motor efficiency, but involves the greatest up-front cost.

When purchasing a new motor is cost-prohibitive, Green Motors service centers seek to sustain the efficiency of the original motor by adhering to rewind procedures that meet or exceed industry-standard ANSI/EASA AR100-2015. Qualifying motors include 15hp to 500hp three-phase induction motors.

Participating utilities offer financial rebates for Green Motors rewinds. Please contact your utility for specific details about rebates, eligibility requirements, and participating service centers near you.

Technologies to Watch
Permanent Magnet Motors
A permanent magnet motor is a type of alternating-current synchronous motor with magnets embedded in the rotor, which creates a constant magnetic field. This causes the motor to rotate at the same speed as the magnetic field produced by the stator windings.
 
Typically, a permanent magnetic motor requires a variable frequency drive for starting and speed control. There are a few new models that are a hybrid of induction and permanent magnet motor design that do not require a variable frequency drive, such as ABB's RPM XE motor. Permanent magnet motors are similar in design and operation as brushless DC motors.
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