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Variable Speed Motors

A reliable source for Fractional Horsepower Motor information and leading Fractional Horsepower Motor Companies & Manufacturers.

The capacity for an engine to adjust speeds is an important feature, especially for applications in which variable speed motors are commonly used such as pumps, elevators, conveyors and machining tools. Read More…

Variable Speed Motors A variable speed motor uses VFDs, or variable-frequency drives, to direct the rotational speed of an AC electric motor. A variable speed motor will do this by controlling the frequency of the power being supplied to the universal motor from an electrical source, thus controlling its output power.
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Leading Manufacturers

Mankato, MN  |  612-746-7624

At Electric Motor solutions, our goal is to provide the best motors and equipment to meet the needs of your application. Products include linear actuators, electric motors, speed reducers, custom motors, vacuum cleaner motors, AC motors, and more.

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Electric Motor Solutions $$$

Stratham, NH  |  844-338-8114

When reliability and power are a must, the universal motors you find at ElectroCraft can operate with high efficiency, low voltage, and at a low cost. Applications that our universal electric motors serve include robotics, packaging, automotive, and medical equipment. Electric motor products include the CompletePower™ Plus Universal Drive, complete with a user-friendly configurable interface. For more details, contact ElectroCraft today!

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ElectroCraft, Inc. $$$

Schaumburg, IL  |  847-439-4949

Quickly rising as the world’s leading motor specialized company, SPG Motor pioneers the fractional horsepower motor market in innovation & advanced quality assurance. All of our fractional horsepower motors are ISO 9001 certified for automation equipment & appliances made by top companies like Whirlpool, Maytag & GE. For more information, contact SPG today!

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SPG USA Inc. $$$

Monroe, WI  |  608-325-9161

At Carter Motor, some of the motors manufactured include AC universal motors, small motors, DC universal motors, DC permanent magnet motors, DC shunt wound motors and gearmotors, along with many others. All Carter Motor products are designed and assembled in the United States by hard-working employees. From engineers to shipping clerks, the staff takes pride in every part of the process.

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Carter Motor Company $$$

El Paso, TX  |  915-599-2727

We have been in business since 1936 so you know you can count on Graham Motors and Controls to deliver the highest quality product. Located in El Paso, Texas we ship nationwide through our extensive network. Turn to us for all your motor and control needs. Call us today for more information or visit our website to see our products and services for yourself.

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Graham Motors & Controls $$$

Elk Grove Village, IL  |  847-439-3760

Merkle-Korff offers a broad range of sub-fractional horsepower motors and gear motors. Products include AC and DC (brush and brushless) motors & small motors (less than 1/10th horsepower). We provide application engineering, technical support & value-added assembly, both domestic & internationally. Since 1911 we have been providing reliable sub-fractional motors. ISO 9001/2000 registered.

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Merkle-Korff Industries $$$
placeholder image Electric Motor Solutions ElectroCraft, Inc. SPG USA Inc. Carter Motor Company Graham Motors & Controls Merkle-Korff Industries

Three-phase motors are most commonly used in variable speed motors, although the small electric motor itself can be a single-phase unit. They are widely used for fractional horsepower, or FHP motor applications because of their ability to control voltage and output current. A variable speed motor is often used in heating and cooling ventilation applications.

Variable Speed Brushless Type DC Motor Variable Speed Motors - Electric Motor Solutions

In such applications, the motor gradually increases to meet its maximum speed rather than starting at its maximum (and only) speed, like fixed speed motors. The speed in a variable speed motor is dependent on the number of poles or winding sets that are built into the motor itself, allowing the speed to increase or decrease in stages. The progressive movement towards high speed eliminates noisy start up sound and reduces wear on components. The variation of speed also allows for precise control of airflow.

Variable speed motors are typically simple to design and fabricate and are an affordable option for most manufacturers. Consisting of a small motor, a controller and a types of interface, they offer reliable and low maintenance options as there are less replaceable parts than other types of motors. The metal bearings of the motor may need to be replaced after an extended period of time as these components are inevitably subject to wear and tear.

There are numerous advantages to implementing the use of small electric motors and they are used in a wide variety of applications in almost every industry. A variable speed electric motor will create no waste emissions and improve air quality. They are cleaner and less expensive to run than fuel-powered motors and because of their efficiency, variable speed motors also use less electricity on average than a fixed speed motor, thus further saving operating costs for a manufacturer.

They are the preferred motor of choice for many appliances in both commercial and domestic applications where AC power is readily available such as washers, dryers, fans, vacuum cleaners and air-conditioning units.

Variable Speed Motors Informational Video