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3 problems you'll face if your electric motor is overrated

If you’re not used to buying electric motors off the shelf then selecting the right motor size to suit your application can be difficult. In our experience, many end users decide to err on the side of caution and choose a motor that is oversized, in the belief that it will comfortably cover their requirements. However, this can actually have adverse effects, three of which we explore below:

1. Efficiency

Almost every motor is intended to run at a certain speed and torque point depending on its designed load. An oversized motor run at a lower torque point will run less efficiently, drawing more power than is needed. Whether the motor is being run by battery or AC supply, the power drain will be greater than if the motor was correctly rated for the application.

2. Performance

Oversized electric motors can overheat if not running close to full load, which can melt the winding insulation and lead to premature failure. The only options at this point are a motor rewind or complete replacement.

3. Cost

Quite simply, the larger a motor is, the more steel and copper it contains which is why electric motor cost tends to rise in line with frame size. For every frame size over specification, the more money you’re needlessly wasting.

So how can you be certain you’re getting the ideal motor for the job in hand? Here at Gibbons we have 45 years’ experience in recommending electric motors and our friendly team are always available to offer their expertise. We offer a huge selection of ABB electric motors along with our own wide range, so we can cover almost any industrial application. We’ll ensure your motor is precisely rated for its intended application, helping you to enjoy optimum performance from it while making significant savings.

So give us a call on 01621 868138 or email and we’ll be happy to help. 

Electric Motors

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