The biggest difference between a permanent magnet motor and an ordinary motor is its rotor, and the rotor of a permanent magnet motor has a powerful permanent magnet. This powerful set of permanent magnets alternates with the rotor poles, resulting in higher efficiency and higher power density for permanent magnet motors.
Due to the use of permanent magnets instead of traditional electromagnetic windings, permanent magnet motors have a simpler structure, less incapacitation, higher stability, and lower losses than ordinary motors. This also makes permanent magnet motors more suitable for future development directions.
It is worth mentioning that the permanent magnet motor has better performance at low speeds, because the magnetic field of the permanent magnet does not change with the speed, so the magnetic flux generated by each magnetic pole remains unchanged, so as to ensure that the torque generated by the permanent magnet motor at low speed is larger and more efficient. Ordinary motors are prone to "moving iron" phenomenon at low speeds, and cannot show excellent performance.
In the future industrial and transportation fields, permanent magnet motors have been widely used, and they have broad application prospects in energy conversion, high-speed transmission, and new energy vehicles. With the advancement of technology and the reduction of costs, permanent magnet motors are also expected to become the mainstream in the field of motors.
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