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Permanent Magnet Motors

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

Permanent magnets are most commonly used in applications requiring constant magnetic force, making them ideal for electric motors. Often manufactured as fractional horsepower motors, permanent magnet motors typically run on a horsepower (HP) of 1 or less, such as ½ HP or ¼ HP. Able to be utilize alternating current (AC) or direct current (DC) electrical flow, permanent magnet motors can have a frame size of 42, 48 or 56, as defined by standards put in place by the National Electrical Manufacturers Association (NEMA). Read More…

Permanent Magnet Motors A permanent magnet motor is a type of electric motor that uses permanent magnets in its rotor assemblies in order to provide motion. The difference between a permanent magnet and a non-permanent magnet is that a permanent magnet retains its magnetism indefinitely, or until finally over-powered by external forces such as vibration, corrosion and interfering magnetic fields.
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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

Permanent magnetic motors are used in a wide range of applications, and industries that benefit from them include: automotive, for use in window wipers, powered seats, central locking systems and more; industrial, in pumps, conveyors, extruders and other processing, manufacturing and assembly equipment; HVAC, in systems and equipment such as fans and blowers; and construction, for heavy-duty materials handling equipment such as cranes and hoists.

Permanent magnet motors are typically separated into two main types based on design and electrical flow: brushless DC motors and permanent magnet synchronous motors. While both types are types of synchronous motors, meaning that the rotor rotates at the same speed as the magnetic field, a brushless DC motor is unique in that it operates based on DC, while most synchronous motors operate on AC, and that it has an electronic commutation system instead of a mechanical one.

Permanent magnet synchronous motors, on the other hand, are run on AC as is typical and induction is not required for magnetic field production. Both are designed in a similar style, with the basic components of an enclosure, rotor, axle, wound armature and permanent magnet. Also referred to as a coil, the wound armature rotates while the magnetic field remains stationary.

The rotation results from the magnet's reaction when the electrical current flows through specific points of the motor. One major difference in design between the two types of motors is that brushless DC motors have a trapezoidal-shaped back electromotive force (EMF) while permanent magnet synchronous motors have a sinusoidal-shaped back EMF. Back EMF refers to the voltage that is induced in the wound armature when the motor is rotating.

Permanent Magnet Motors Informational Video