What Is The Permanent Magnet Synchronous Motor?

The PERMANENT MAGNET SYNCHRONOUS MOTOR is mainly composed of the stator, rotor, chassis, front-rear cover, bearings, etc. The structure of the stator is the same as that of ordinary asynchronous motors, and the main difference between the permanent magnet synchronous motor and other kinds of motors is its rotor.

The permanent magnet material with pre-magnetized (magnetic charged) magnetic on the surface or inside the permanent magnet of the motor, provides the necessary air gap magnetic field for the motor. This rotor structure can effectively reduce the motor volume, reduce loss, and improve efficiency.

Basic Principle of Permanent Magnet Direct Drive Motor

A permanent magnet direct drive motor is a type of motor that uses a permanent magnet as a rotor and realizes transmission by directly connecting the motor's rotating shaft to the mechanical load being driven. It offers higher efficiency, lower noise, and higher accuracy than conventional drives.

Permanent magnet and stator

The rotor of a permanent magnet direct drive motor utilizes permanent magnets, which are usually made of rare earth permanent magnet materials. These permanent magnet materials have a high magnetic energy product and magnetic energy density, which provides a strong magnetic field. The permanent magnets on the rotor are usually divided into several pole pairs, each consisting of a south pole and a north pole.

The stator of a motor consists of a stator core and stator windings. The stator core is an annular core with several stator slots inside, and the stator windings are mounted in the stator slots. The stator winding is usually a three-phase winding, i.e., three separate coils called phase A, phase B, and phase C.