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Training course on energy efficiency in SMEs - engine-sme.eu

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2. Reduc<strong>in</strong>g motor load<br />

There is little po<strong>in</strong>t <strong>in</strong> improv<strong>in</strong>g the motor and its c<strong>on</strong>trols<br />

if the driven equipment is <strong>in</strong>efficient. Industrial motors are<br />

designed to operate at fixed speeds under a wide range of<br />

loads.<br />

Standard motors tend to reach <strong>efficiency</strong> at 80-100% of full<br />

load.<br />

Motor <strong>efficiency</strong> drops quickly when motors operate below<br />

40% of full rated load.<br />

As a rule of thumb it can be said that at least <strong>on</strong>e third of<br />

all <strong>in</strong>tegral horsepower motors are oversized for their<br />

loads.<br />

www.eng<strong>in</strong>e-<strong>sme</strong>.<strong>eu</strong>

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