A Detailed Overview Of Single Phase Electric Motor Diagram

Single Phase Electric Motor

Electric motors are devices that convert electric energy into mechanical energy. The most common type of electric motor is the single-phase induction motor. 

In this article, we will take a detailed look at the diagram of the inner workings of a single-phase induction motor. We will also explore different components of single-phase induction motors. 

A detailed overview of single phase electric motor diagram

Circuit single phase electric motor diagram

Figure 1. Circuit single phase electric motor diagram

The single-phase electric motor is the most common type of motor found in household appliances such as fans, blowers, pumps, and air conditioners.

A single-phase electric motor diagram is a schematic representation of the electrical connections and components that make up a single-phase electric motor. 

The diagram includes the name and function of each component, as well as the direction of the current flow. Knowing how to read a single-phase electric motor diagram is essential for troubleshooting and repairing these motors. 

For more understanding, here is our detailed guide on Single Phase motors.


The rotor of a single-phase electric motor is the rotating part of the motor responsible for generating torque. It consists of a suspension system that holds the magnets in place and a shaft to which the magnets are attached. 

The magnets create the magnetic field that interacts with the armature to produce torque. The armature is wound with wire that makes a magnetic field when current is passed through it. 

This interaction between the armature and the rotor causes the rotor to rotate. The faster the armature spins, the greater the force of the interaction and the greater the torque generated. 

electric motor Rotors

Electric motor Rotors

Stating winding:

Starting winding is a winding that is electrically disconnected from the armature after the motor has started. The primary function of the starting winding is to create a rotating magnetic field in the stator. 

This rotating field interacts with the rotating armature to create torque. The starting winding is typically made of thicker wire than the run winding because it must carry more current. 

It is also wound in such a way that it creates a strong magnetic field. When the motor is started, the armature begins to rotate, and the starting winding is no longer needed.

Single Phase Electric Motor Winding

Running winding:

Running winding in a single-phase electric motor provides the turning force, or torque, required to rotate the armature. The current in the running winding creates a magnetic field that interacts with the magnetic field of the permanent magnets in the stator to produce torque. 

The amount of torque produced is determined by the strength of the current in the running winding and the strength of the permanent magnets. 

When the armature rotates, the direction of the current in the running winding reverses, which causes the magnetic fields to reverse and produces a reversing force that rotates the armature in the opposite direction. 


A capacitor is an electronic device that stores and releases electricity. It comprises two metal plates separated by a dielectric material, such as rubber or glass. 

In a single-phase electric motor, the capacitor helps start the motor by providing a power boost. Once the motor runs, the capacitor is no longer needed and can be disconnected. 

Although capacitors are an essential component of single-phase electric motors, they can also be found in other devices such as lights, radios, and computers.

For more information about how capacitors are used in single-phase motors, here is our guide on Single Phase Motor with capacitors.

Direction of the current:

The direction of the torque can determine the direction of the current on a single-phase electric motor. The torque is the force that turns the motor’s rotor or moving part. If the torque turns the rotor in a clockwise direction, then the current flows in a counterclockwise direction. 

If the torque turns the rotor in a counterclockwise direction, then the current flows in a clockwise direction. The direction of the torque is determined by the interaction between the stator’s magnetic field and the rotor’s magnetic field.

Conclusion- single phase electric motor diagram:

Electric motors have been used for a long time, dating back to the early 1800s. They are simple machines that convert electrical energy into mechanical energy and are used in various applications. 

The single-phase electric motor has a straightforward construction. Understanding the essential parts of a single-phase motor diagram will help you know how these motors work and how to troubleshoot them if they stop working.

Xinnuo motor is China’s top manufacturer of single-phase electric motors. The company has been in business for over 2 decades and has supplied motors to some of the largest companies in the world. The company’s products are known for their quality and reliability. 

The company offers a wide range of products, from small fractional horsepower motors to large industrial motors. In addition to its manufacturing capabilities, the company has a strong research and development team that is constantly innovating new products and improving existing ones. 

As a result of its dedication to quality and innovation, XINNUO has become one of the most trusted names in the electric motor industry. Contact us to learn more about our products.

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