Doubly Salient Permanent Magnet Motor

Abstract

The invention discloses a doubly salient pole permanent magnet motor. The technical problem to be solved is that in the ordinary doubly salient pole permanent magnet motor mentioned in the background art, in the process of controlling the rotation of the rotating shaft, due to the inevitable mechanical contact, there will be Frictional losses greatly reduce the life of the bearing and increase the technical problems of maintenance workload. The technical solution adopted is a doubly salient pole permanent magnet motor, including a rotating shaft, a rotor yoke, a stator sleeve, two stator discs, an annular permanent magnet and a stator yoke, and the control winding is wound on the annular permanent magnet and the stator magnetic On the yoke, a control magnetic field is provided. The armature winding is wound on the salient pole of the stator to provide the armature magnetic field, and the annular permanent magnet is embedded in the middle of the stator sleeve to provide the excitation magnetic field. Advantages, the double salient pole permanent magnet motor integrates the characteristics of the magnetic bearing and the double salient pole motor, which not only exerts the advantages of the magnetic suspension bearing without mechanical wear and long life, but also realizes the purpose of low energy consumption and high efficiency of the double salient pole motor .

Description

technical field [0001] The invention relates to a double salient pole permanent magnet motor. Background technique [0002] As early as 1842, the British Earnshaw proposed the idea of ​​magnetic levitation technology and proved that it is impossible to achieve stable levitation for any combination of static magnets in any form of fixed magnetic field and gravitational magnetic field. By the end of the 1930s, the German Kemper realized the use of changes in the magnetic force of ferromagnetic suspensions to achieve stable suspension and obtained a patent for magnetic suspension technology. Subsequently, the magnetic suspension bearing technology has attracted the attention of scholars at home and abroad and has developed rapidly. The principle of magnetic levitation technology is to use magnetic force to keep objects in a non-contact state. Since there is no mechanical contact between the stator and rotor, magnetic bearings have the following advantages: [0003] 1. Since ...

AI Technical Summary

Problems solved by technology

At the same time, the double salient pole permanent magnet motor also has many shortcomings. Due to the salient pole cogging effect, the torque ripple is relatively large when the motor is running, and it is difficult to achieve a weak magnetic speed increase. Therefore, the problem of cogging torque limits the double salient pole permanent magnet motor. Motor application

[0012] In the process of controlling the rotation of the shaft, ordinary doubly salient permanent magnet motors, due to the inevitable mechanical contact, generate friction loss, which greatly reduces the life of the bearing and increases the maintenance workload.

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