Single Phase Motors Manufacturer

Single-phase motors are AC motors that use electromagnetic principles to create useful rotational energy. They operate in much the same way that squirrel cage, wound rotor, and other polyphase motors work, except they are somewhat simplified. “Single-phase” only refers to the input power, so there are many types of motors that use single-phase inputs. They are commonly found in induction motors but can also be synchronous. Single-phase motors contain both stators and rotors like most electric motors, but they only use one winding in their stator, which carries only one AC, and their rotors tend to be more essential than those of other designs.

Working Principle

How do Single Phase Motors Work?


Rotor takes part in rotating a 1motor. Its shape is cylindrical. So its whole surface consists of lots of slots. There are aluminum-based rotor conductors placed in these slots.


This is a non-movable part of a single-phase motor. The stator that receives an alternating current, contains the windings. This AC supply causes Hysteresis and Eddy current loss here.


A single-phase motor contains two types of windings. These are called primary and secondary windings. The primary winding is placed in a vertical position concerning the auxiliary winding. This winding is attached to a capacitor that is used in motor starting.
Single-phase motors use both stators and rotors like other AC motors, though they work much differently. In three-phase motors, the 120 degrees of phase separation between the three AC currents running through the stator windings produces a rotating magnetic field; however, the magnetic field made by only a single phase “pulsates” between 2 motor poles, as there is only one AC current producing two possible magnetic field states. This approximates a rotating field, but not completely. These motors must be given an initial “shove” or feel a force “out-of-phase” with the stator phase for the initial movement of the rotor. The stationary rotor will not feel any effects from this pulsating, “up-down” magnetic field if it is not already moving, as the up-down magnetic forces cancel each other out perfectly. Motor starters solve this issue by adding an out-of-phase influence, which then creates a simulated rotating magnetic field to start the motor.

Motor Types

Types of Single Phase Motors

Split-phase Motors

Split-phase motors implement an auxiliary winding outside the stator coil to provide the initial phase difference needed for rotation. The starter winding uses smaller diameter wire and fewer turns than the stator winding, giving it more resistance.

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Capacitor Start Motors

In these types of single-phase motors, capacitors alongside an auxiliary winding provide the phase difference needed to start rotation in these motors. They are similar to split-phase motors but use capacitance instead of resistance to shift the starter phase.

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Shaded Pole Motors

This motor is more simplistic than other single-phase motors, as it requires no extra starter circuits or switches. The C-core motor housing is made up of magnetically-conducive material, which transfers the pulsating magnetic field from the main stator winding to the rotor.

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Permanent-Split Capacitor Motors

Permanent-split capacitor motors use a permanent capacitor in series with the starting winding, with no centrifugal switch. The capacitor is in continuous use when the motor is running, meaning it cannot provide the boost that is given by a start capacitor customary in the previous two designs.

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Single-phase motors are used in equipment and machines that are smaller in size and require lower horsepower (for example, one horsepower). This include equipment such as pumps, refrigerators, fans, compressors, and portable drills.


Single-phase motors don’t create a magnetic field on their own, so they must be switch activated in order to make the rotor move. This type of motor can only operate once the rotor is set in motion and a magnetic field is created.


Single-phase motors are less expensive to manufacture than most other types of motors. Single-phase motors typically require very little maintenance, don’t often require repairs, and are relatively easy to complete.


Single-phase motors, on occasion, have been known to run slow, overheat, or even fail to start, overheat or run slow. If a shock is felt while touching the motor, a problem with the motors will need to be repaired immediately.

Applications of Single Phase Motors

For excellent efficiency, single-phase motors are used in refrigerators, freezers, and heaters. Because of form utility, the motors come in different variations of 0.5HP to 15HP. They are also used in home equipment and devices such as clocks, washing machines, grinding machines, and computers.

About Us

Company Profile

We are a professional electric motors manufacturer and AC motors supplier. We mainly produce three-phase and single-phase motors; the product specification is complete, the quality guarantee, and the life-long maintenance. All products are through 3C certification quality system certification; the products sell well all over the country and are exported to Southeast Asia, Germany, Italy, Poland, Britain, France, the Middle East, South America, Africa, Asia, etc. More than 80 countries and regions. Widely used in air compressors, washing machines, water pumps, fans, the mechanical industry, and reducers, such as the host.

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Single-Phase Motor

“The single-phase motor does not contain commutators and slip rings. So its construction is more accessible than many other motors. It has simple wiring due to having only two wires. This motor doesn’t require enough maintenance and repair. Its durability in low-PF (power factor) machinery is impressive. It is resistant to extreme electrical, thermal, and mechanical stresses. Single-phase motor’s working life is generally more than years.”

What Are The Advantages Of Using A Single Phase Electric Motor?

Single-Phase Motor Advantages

Learn More Information About Our Products

We’re professional single-phase motor manufacturers and suppliers in China that provide high-quality customized products. If you buy or wholesale a single-phase motor for sale, you are welcome to get a pricelist from our factory. For price consultation, contact us.


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