A Bilateral Permanent Magnet Synchronous Motor

Abstract

The invention discloses a bilateral permanent magnet synchronous motor, comprising: a stator, a winding, a rotor permanent magnet, a stator permanent magnet and a rotor; the stator and the rotor are coaxially sleeved; grooves are arranged on the outer surface of the rotor and the inner wall of the stator, The rotor permanent magnet is set in the groove of the rotor, and the winding is set in the stator groove; the stator is set with stator teeth, one side of the stator tooth is raised, and the other side is set with a stator permanent magnet, and the positions of the protrusions of the adjacent stator teeth are opposite ; The polarities of the permanent magnets of the stator and the permanent magnets of the rotor are the same; the stator is sleeved on the outside of the rotor or the stator is sleeved on the inside of the rotor. Compared with the traditional permanent magnets arranged on the outer surface of the simple rotor, since the present invention uses double-sided permanent magnets for excitation, the magnetic load is increased, and the torque density is proportional to the magnetic load. Therefore, the torque density of the permanent magnet synchronous motor of the present invention is higher, and then The cost of the motor is reduced.

Description

A bilateral permanent magnet synchronous motor technical field [0001] The invention belongs to the motor field, and more particularly, relates to a bilateral permanent magnet synchronous motor. Background technique Traditional permanent magnet synchronous motor utilizes the feature of permanent magnet high magnetic energy product, has the advantage of high torque density, high efficiency, Suitable for various operating occasions, for example, the permanent magnet synchronous motor disclosed in the patent document CN109510353A can be used for new energy vehicles field, the external rotor permanent magnet synchronous motor disclosed in the patent document CN109347246A can be used for the occasion of the flywheel energy storage, the patent document The permanent magnet synchronous motor disclosed in CN109368141A can be applied to systems such as coal mine belt conveying. At present, various industrial applications of high-speed development have put forward higher and hi...

AI Technical Summary

Problems solved by technology

However, the existing methods for increasing the torque density usually lead to the continuous increase of the cost of the motor, and the price of the permanent magnet accounts for about 70% of the cost of the permanent magnet synchronous motor. Torque Density of Magneto

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