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Permanent magnet direct drive motor is a special type of motor with a main feature of directly installing the permanent magnet on the rotor, eliminating the transmission devices (such as gears, belts, etc.) in traditional motors and achieving direct mechanical coupling. Its structural form usually includes the following parts:

1. Stator: The stator is the fixed part of a permanent magnet direct drive motor, consisting of a set of stator coils wound on the iron core. The stator coil generates a rotating magnetic field through current excitation, which interacts with the permanent magnet in the rotor to generate torque.

2. Rotor: The rotor is the rotating part of a permanent magnet direct drive motor, composed of one or more sets of permanent magnets. The permanent magnets are usually made of rare earth permanent magnet materials, which have high magnetic energy product and high magnetic energy storage density. The permanent magnet on the rotor interacts with the rotating magnetic field generated by the stator coil through the magnetic field, thereby generating torque.

3. Shell: The shell is the protective and supporting structure of a permanent magnet direct drive motor, usually made of cast aluminum or iron, with good rigidity and heat dissipation performance.

4. End cover: The end cover is the fixed part of the motor, used to fix the rotor and stator, while also serving as a seal and support.

5. Bearings: Bearings are used to support the rotational motion of the rotor, usually using high-precision, high-speed ball bearings or magnetic levitation bearings.

In summary, the structural form of permanent magnet direct drive motors is relatively simple, consisting of stator, rotor, outer shell, end cover, and bearings. Its characteristic is to achieve efficient and high-performance motor transmission through direct mechanical coupling, which is suitable for many fields, such as industrial production, transportation, aerospace, etc.