Energy Efficient Motor Operation Costs

April 22, 2013

There are three major steps to determine motor operation costs. First, use energy efficiency and required output power to calculate input power. Next, multiply the hours per year and input power to establish the energy usage. Finally, the energy usage and electrical rate are used to calculate the annual operating cost.

How to Calculate Cost

For example, a designer has a ½ hp motor (373 W) that is 70% efficient. This would require an input power of 533 W. If this motor were to be run 8 hours a day, 7 days a week, then the yearly number of hours would be 2,912 hrs. The annual energy usage at this duty cycle would be 1,552 kW-hrs. At an electrical rate of 12 cents/kW-hr, the annual operating cost would be $186.24.

How do input power,energy efficiency and output power affect fractional horsepower motor operation costs

How to use the Motor Search Tool

Narrow your search by selecting motor type, gearbox, voltage, and phase options for your desired motor.

Select a dominant variable: choose one of the three parameters to narrow your search. The selected variable determines which slider bar you will be able to manually move.

Use the slider corresponding to your dominant variable to further narrow your motor selection. The other sliders will automatically move to show available ranges based on the range of your selected variable.

Results will upload as your search criteria changes. If you have any questions regarding your results or how to use the search tool, you can chat with us using the green tab on the left-hand side of your screen.


Note: Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Selecting the Universal motor type will prompt a message taking you to the Universal product page.

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One of our team members would be happy to help. Contact us at 800-829-4135 or by email at sales@groschopp.com. You can also chat with us using the green tab on the left side of your screen.

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Universal Motors

Groschopp Universal motors are custom built to fit your application so no additional options are available to narrow the search. Standard frame sizes and motor features can be found on the Universal page.

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