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AC Motors

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

An AC motor, or rather an alternating current motor, is a device mechanism consisting of a stator with a coil connected to an alternating current supply and producing mechanical energy. Read More…

AC Motors AC (alternating current) electric motors supply the speed and torque in a drive system by changing electric energy into movement using magnetism and alternating currents.
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Leading Manufacturers

Stratham, NH  |  844-338-8114

We manufacture motors, motion control and rotating products for OEMs. The electric motors obtainable through us include AC motors, AC/DC motors, brushless DC motors, stepper motors.

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ElectroCraft, Inc. $$$

Monroe, WI  |  608-325-9161

Since our inception in 1932, Carter Motor manufactures AC universal motors, small motors, DC universal motors, DC permanent magnet motors, DC shunt wound motors and gearmotors, and many others. All of our products are designed and assembled here in the USA. Our team is here to help you determine the best motor to fit your application and to ensure the process is efficient and stress-free. We are ISO 9001:2015 certified.

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Carter Motor Company $$$

Brooksville, FL  |  352-799-2599

The products of Composite Motors, Inc. all undergo the same AS9100 certified design, manufacture and testing protocol. These products include Brushless DC motors, motor drivers, Lithium Ion batteries and Battery Management Systems, gear motors and linear actuators. All products are made in the USA from raw materials. Visit our website to learn more and to view our newest products.

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Composite Motors, Inc. $$$

Woodville, WI  |  715-698-2488

McMillan Electric is a custom designer and manufacturer of high-quality precision electric motors. Shaded Pole, Permanent Split Capacitor, Permanent Magnet and Brushless DC are examples of our motors. We’ve been making motors since 1976 and continue to do our best. Shipping our products to customers across America, we would like to demonstrate our capabilities to you as well. ISO 9001 certified.

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McMillan Electric Company $$$

San Leandro, CA  |  510-567-0630

Our specialty is electrical mechanical apparatus remanufacturing. We are the largest repairer of electric motors such as AC motors, DC motors, fractional HP motors and other small specialized equipment to 30,000 HP. In addition, we sell new electric motors (AC & DC), gearmotors and gearboxes.

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Koffler Electrical $$$

Reedsburg, WI  |  608-524-4341

Hankscraft OEM is recognized as a Six Sigma Black Belt-certified, low risk manufacturer. Founded in 1920, Hankscraft has been producing dependable, high-value components and complete turn-key solutions for Fortune 500 companies and others where manufacturability and profitability are key.

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Hankscraft, Inc. $$$
placeholder image ElectroCraft, Inc. Carter Motor Company Composite Motors, Inc. McMillan Electric Company Koffler Electrical Hankscraft, Inc.

What is an AC Motor?

The stator remains stationary while the rotors rotate about due to the mechanical force generated.

AC Motor

AC motors are usually single-phase or three-phase, depending on the intended task. The three-phase motors are mainly used for high power conversions, and the single-phase motors for small power conversions.

How an AC Motor Works

Overall, the working principle of an AC motor depends on magnetism. A magnetic field is generated when an alternating current is driven through a coil.

How an AC Motor Works

A current is then induced, and a rotary magnetic force is generated. This force causes the rotor to spin about, generating a mechanical force that can be harnessed to machines and simplify the work.

Types of AC Motors

The different types of AC motors include:

Single-Phase AC Motor

These motors are used when there is only a single phase supply of electricity. This type is known to be less expensive and smaller in size. The rotor in this type of motor rotates with respect to the sum of the two rotating fields. The torque produced is equal and opposite to the resulting force.

Single Phase AC Motor

Polyphase AC Motor

These alternating current motors have two- or three-phase supplies but operate as single-phase motors. A polyphase motor produces about twice as much as a single-phase motor, and the electric current is constant, unlike the pulsating current of the single-phase motor.

Polyphase AC Motor

Synchronous AC Motor

In a synchronous alternating current motor, the rotation of the shaft is at a frequency similar to the current supply. The speed of the rotation of the synchronous motor does not depend on the load. This type of motor is not self-starting, unlike the common self-starting motors, which have the power supply connected directly to the stator.

Synchronous AC Motor

Asynchronous AC Motor

This type of motor uses the induced current in the rotors to produce a rotary motion. All power for the rotor comes from the induction that occurs in the stator. The rotor induction is due to the proximity electromagnetic field in the stator. The absence of brushes or slip rings in the model makes this motor more efficient and reliable when compared to other motors. It is commonly used for heavy-duty tasks because of its simplicity and ruggedness.

Asynchronous AC Motor

Hysteresis Motor

The hysteresis motor is made up of semi-permanent magnet material. The torque is generated by the magnetic flux dragging behind the external magnetizing force. The hysteresis AC motor has an inside core of non-magnetic material and a smooth cylindrical stator without windings.

Applications of AC Motors

AC motors are used in numerous day-to-day applications. They are usually used when a constant driving force or motion is required. Additionally, the motors are perfect for projects requiring very high performance and resultant torque. The motors are commonly used in power tools, inside disk drives, clocks, pumps, blowers, fans, conveyor belts, washing machines, and other industrial areas.

Advantages of AC Motors

The design of alternating current motors is simple, and the whole mechanism is generally not very expensive. Maintenance costs are relatively cheaper and do not require very high expertise. The AC motor has a favorable output power factor and comes in lightweight mechanisms. AC motors also depend on power consumption to produce mechanical energy as they do not leave any residues behind.

A summary of the advantages of AC motors denotes and includes:

  • Cost-efficient
  • Controllable acceleration
  • Simpler designs
  • Less vibration and noise
  • More productive and efficient
  • Various available models

AC Motors Informational Video


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