The permanent magnet synchronous motor, referred to as PMSM, is actually an AC motor. Its stator runs with a three-phase difference alternating current, while its rotor is a permanent magnet. In this article, let's take a closer look at the advantages and applications of permanent magnet synchronous motor. Advantages and Applications of Permanent Magnet Synchronous Motor
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The biggest advantage of this kind of motor is that the AC power is provided by DC so that the motor can be accurately controlled and the life problem caused by the brush is solved.
1. The motor is small in size and light in weight In recent years, with the continuous application of high-performance permanent magnet materials, the power density of permanent magnet synchronous motors has been greatly improved. The output torque of permanent magnet synchronous motors under the same volume is about 1.7 times that of induction motors. 2. Wide speed range The permanent magnet synchronous motor based on the special structure design can adopt the maximum torque/current control strategy during constant torque operation and adopts the field weakening control strategy during constant power operation, which can obtain good speed regulation operation characteristics, and successfully achieved over 5 times the field weakening speed range. 3. Small moment of inertia, high acceleration can be obtained, and good dynamic performance 4. Large overload capacity The rotor of a permanent magnet synchronous motor has no slippage. When rigid processing is carried out, there will be no surface effect processing abnormality caused by speed fluctuation.
Permanent magnet synchronous motors have the advantages of simple structure, small size, high efficiency, and high power factor. It has been widely used in the metallurgical industry (ironmaking plant and sintering plant, etc.), ceramic industry (ball mill), rubber industry (internal mixer), petroleum industry (pumping unit), textile industry (double twist machine, spinning frame) and other industries in the medium and low voltage motor.
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Thank you for reading our article and we hope it can help you to have a better understanding of the advantages and applications of permanent magnet synchronous motors. If you want to learn more about permanent magnets, we would like to advise you to visit Stanford Magnets for more information. As a leading magnet supplier across the world, Stanford Magnets has been involved in R&D, manufacturing, and sales of magnets since the s. It provides customers with high-quality permanent magnets like SmCo magnets, neodymium magnets, AlNiCo magnets, and ferrite magnets (ceramic magnets) at a very competitive price.
The three-phase stator poles are connected to an alternating current (AC) supply to produce a rotating electromagnetic field. At synchronous speed, the rotor poles are attracted and repulsed to and from the stator poles which creates the movement of the rotor. Our PMSMs use two possible configurations: they can have an internal (inner) rotor or an external (outer) rotor, depending on their application.
We use PMSMs for their low noise, high performance, and efficiency. They are also characterised by smooth rotation over the entire range of a variable speed motor, full torque control at zero speed, and fast acceleration and deceleration. To achieve such control, we use field-oriented control (FOC) techniques (also known as vector control) for our PMSMs. Learn more about FOC.
PMSMs power density is higher than that of induction motors with the same specifications, since there is no stator power dedicated to magnetic field production. Today, these motors are designed to be more powerful while also having a lower mass and lower moment of inertia, improving the dynamic performance of the electric drive.
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