A Permanent Magnet Synchronous Motor (PMSM) is a synchronous motor that uses permanent magnets to create a magnetic field. It features small size, high efficiency, and a high power factor. Its rotor uses permanent magnet materials and can operate without external excitation. Energy conversion is achieved through the synchronous interaction of the stator's rotating magnetic field and the rotor's magnetic field. Compared to traditional asynchronous motors, it significantly improves energy efficiency by more than 10% under light load conditions, and also has higher power and torque densities.
A Permanent Magnet Synchronous Motor (PMSM) is a synchronous motor that uses permanent magnets to generate a magnetic field. The rotor's speed is synchronized with the current frequency of the stator windings.
A PMSM consists of a stator, rotor, and end covers. The stator is basically the same as that of a conventional induction motor, using a laminated structure to reduce iron losses during operation. The rotor can be solid or made of laminated laminations. The armature winding can use concentrated full-pitch windings, distributed short-pitch windings, or unconventional windings.
The working principle of a permanent magnet synchronous motor is based on the interaction between the rotating magnetic field generated by the stator and the magnetic field generated by the permanent magnets on the rotor. The rotor is equipped with pre-magnetized permanent magnets, which can generate a strong magnetic field when rotating, thereby providing a larger output torque. The motor control system will precisely adjust the current to ensure that the motor rotor can rotate synchronously with the rotating magnetic field and maintain a stable operating state.
Permanent magnet synchronous motors are a widely used type of motor with advantages such as high efficiency, good dynamic response performance, and low noise . They are widely used in electric vehicles, robots, and other fields that require high efficiency, high dynamic performance, and low noise.
Applied to the drive system and energy recovery system of vehicles such as the Little Ant. At the same time, it covers more than ten fields such as rail transit (such as my country's first permanent magnet straddle monorail train in 2016), industrial automation (cranes, conveyor belts), ship propulsion, and medical devices (CT scanners). Speed regulation. Compared with traditional asynchronous motors, the rotor coil structure is eliminated, reducing excitation losses.