30/01/2017
Motors of a higher efficiency class are more complex to design and produce, and contain more metal, different metals, or higher grade metals to provide conductors with lower losses. The motor price will increase accordingly. In relation to the motor lifetime the purchase price is only a few percentage points and, due to the saved energy cost, the pay-back period is short.
To learn more about how to calculate the savings from improved efficiency, take our class on “Motors: Loads, Losses and Operating Costs”
Efficiency Gains With IEC Standards
The efficiency gains from investing in a premium efficiency motor can be considerable. For smaller motors the difference between IE2 high efficiency and IE3 premium efficiency is around 3%. Between IE1 and IE2 the improvement can be as high as 10%. The efficiency improvement tends to be smaller in larger motors, but with the higher energy consumption, improvements of just 1% can rapidly pay for themselves
