What is a permanent magnet synchronous motor?

AIP shares with you the" What is a permanent magnet synchronous motor?".

October 23, 2023

What is a permanent magnet synchronous motor?

Permanent magnet synchronous motors (PMSM) are an important technological innovation in the field of electric motors, which have attracted attention for their high efficiency, sustainability, and low maintenance costs. In this paper, we will provide an in-depth introduction to what a permanent magnet synchronous motor is, and discuss its performance, wide range of application areas, and future development trends.

Ⅰ. Introduction to Permanent Magnet Synchronous Motors

A permanent magnet synchronous motor is a type of synchronous motor characterized by a rotor equipped with permanent magnets and these permanent magnets produce a fixed magnetic field. When current passes through the stator windings, the resulting magnetic field interacts with the magnetic field of the permanent magnets, causing the motor to rotate. This synchronization ensures that the motor is highly efficient, as the rotor and magnetic field remain synchronized, reducing energy losses.

Permanent magnet synchronous motor

Ⅱ. Performance of permanent magnet synchronous motors

Permanent magnet synchronous motors are known for the following performance characteristics:

a. High Efficiency: PMSMs have high efficiency and are able to convert most of the input electrical energy into mechanical power, reducing energy waste.

b. High Power Density: The high power density of this motor makes it suitable for applications where space is limited, such as electric vehicles and industrial machinery.

c. High Precision: Permanent magnet synchronous motors provide excellent speed and position control and are suitable for precision applications such as robotics and automation systems.

d. Low Noise: Due to their synchronous operation characteristics, PMSMs usually run smoothly, reducing vibration and noise.

Ⅲ. Applications of Permanent Magnet Synchronous Motors

Permanent magnet synchronous motors have a wide range of applications in various fields, some of the major applications include:

The application site of permanent magnet synchronous motor

a. Electric Vehicles: PMSMs are one of the main drivers of electric vehicles as they offer high power density, high efficiency, and low noise characteristics. These features help to increase the range of electric vehicles, reduce energy consumption, and minimize exhaust emissions.

b. Industrial Automation: In industrial automation, PMSMs are used to drive robotic arms, conveyor belts, and other automation equipment. Their high precision and efficiency make them ideal for production lines.

c. Wind Power: PMSMs are used in wind turbines, where their high efficiency and reliability help to increase the energy output of wind power stations.

d. Home Appliances: PMSMs are used in home appliances including fans, washing machines, refrigerators, and air conditioners. They provide lower energy consumption and longer service life.

Ⅳ. Future Trends in PMSMs

a. Intelligence and Automation: With Industry 4.0 and the Internet of Things (IoT), PMSMs will continue to play a key role in smart factories and automation systems.

b. Sustainable Energy: In the field of renewable energy, the high efficiency of PMSMs helps to improve the energy conversion efficiency of solar and wind energy systems, making renewable energy more competitive.

c. Electric Mobility: As electric vehicles become more popular, PMSMs will continue to play a key role in reducing fuel consumption and improving air quality.

d. Energy Saving and Emission Reduction: Due to their high efficiency, PMSMs help to reduce electrical energy consumption, lower carbon emissions, and combat climate change and environmental protection.


Permanent magnet synchronous motor (PMSM) is a key motor technology that is highly preferred in various fields for its high efficiency, high power density, and sustainability features. Through ongoing research and development and applications, PM synchronous motors will continue to drive energy efficiency, reduce carbon emissions, and contribute to innovation and sustainability in a variety of fields. Understanding how permanent magnet synchronous motors work and the areas of application will help to better understand the importance and future prospects of this technology.

Permanent magnet synchronous motors play an important role in the development of human society, so it is also very important to guarantee the quality of permanent magnet synchronous motors. If you need a permanent magnet synchronous motor tester and another motor tester, please contact AIP via Tel/Whatsapp: +86-13969776659, E-mail: international@aipuo.com.