Don't Let New Motor Rules Agitate You

A Machine Builder Needs to Know Why His Company Has to Modify Its Machine Design

By Mike Bacidore

We've been using a three-phase, 1-hp, 56-frame stainless-steel motor to power the agitator on the food processing lines we build. Our motor supplier is telling us that, because of new DOE regulations, we won't be allowed to buy this same size motor any longer. The new size will be not only more expensive, but also slightly longer and would require us to make modifications to our machine design. What are these new regulations, and why are they doing this? What are my options?

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  • <p>Since you are talking about a stainless motor used in food processing, I would expect it to be enclosed and fall under the new Integral HP Motor Rule effective June 1, 2016. Today the efficiency of this size motor is unregulated, so the efficiency may need to be increased a lot to get to the 82.5% for this rating. Some manufacturers offer this rating today at Energy Efficient (table 12-11) that would need a small increase in material or at the Premium Efficient (table 12-12) which is already compliant. DOE reviews efficiency regulations every 5 years. Standardizing at premium efficiency will be a better solution that raising the efficiency level above premium. Remember the purchase price of the motor is only about 2% of the motor's life cycle cost. Over 97% is from electricity used for operation. As an OEM you can market reduced operating costs for your equipment. Motor manufacturers cannot build non-compliant motors after June 1,2016. You have a while to evaluate what designs might fit. Perhaps try a TENV motor instead of TEFC. </p>


  • <p>This is due to the Small Motor Rule, which raises the efficiency levels above levels that the motor manufactures considered reasonable. The motor coalition fought the DOE in every direction possible, including legal action. I would suggest that your motor supplier file a complaint with the DOE against the new legislation and explain how it negatively affects the end-users of their products. Bill Finley Director Technology Siemens </p>


  • <p>The US Department of Energy (DOE) passed legislation several years ago that is going into effect on March 9th, 2015. This legislation dictates the minimum energy efficiency of small electric motors from ¼ HP to 3 HP. The purpose of this legislation is to increase the energy efficiency of these motors and thereby reduce carbon dioxide emissions. The specific full load efficiency required can be found in the documentation for code 10 CFR 431.446. I would have to assume that the Stainless Steel Motor that is being used in this application does not meet the new efficiency requirement. If you have space constraints, you might want to look at using a Kollmorgen AKMH servo motor to replace this induction motor. An AKMH44H with 56C flange would replace the 1 HP induction motor in a smaller footprint. </p> <p>ANSWER by Gene Matthews, Product Manager, Kollmorgen </p>


  • <p>The rule in effect here is not the Small Motor Rule as it is a stainless washdown enclosed motor in use. It would be the Integral HP Rule going into effect June 1, 2016. As Bill says, you can contact the DOE with your problem. When the hearings were underway, there was insufficient input from OEMs and users regarding product utility (form, fit and function). A new Small Motor Rule will start the regulatory process next year which will add enclosed motors to the present ODP motors under regulation. This will expand the scope to include IEC motors as well. OEMs should watch for the NOPR and either attend the meeting or ask their trade association to represent them there.</p>


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