Magnetic-concentrating-type consequent-pole cursor permanent magnet motor and application thereof

Abstract

The invention discloses a magnetic-concentrating-type consequent-pole cursor permanent magnet motor, which comprises a primary core and a secondary core, wherein a plurality of open slots are formed in the primary core; armature windings are arranged in the open slots of the primary core; the secondary core and the primary core are arranged at an interval and can oppositely move; Halbach permanent magnets are arranged in notches of the open slots of the primary core, thereby forming a Halbach (Halbach) permanent magnet array; a plurality of open slots which are arranged at intervals are formed in the surface, relative to the primary core, of the secondary core and permanent magnets are arranged in the open slots, thereby forming an excitation permanent magnet array; and the magnetization direction of the Halbach permanent magnet array is matched with that of the excitation permanent magnet array. Through comprehensive application of a consequent-pole structure and a Halbach array, the air-gap flux density of the motor is significantly strengthened, the air-gap electromagnetic power transmission capacity of the motor is improved, the electromagnetic properties of the counter electromotive force, the thrust density, the power factor and the like of the motor are improved, and reduction of the volume of the motor, improvement of the acceleration performance of the motor and reduction of the capacity of a frequency converter are facilitated.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors, in particular to a vernier permanent magnet motor and its application. [0002] technical background [0003] Vernier permanent magnet motor such as vernier permanent magnet linear motor is a new type of motor based on magnetic field modulation theory that has been gradually developed in recent years. It is characterized by large torque density and small torque fluctuation. It has good applications in fields such as propulsion, food processing and electric vehicles. The conventional vernier permanent magnet motor is easy to form a large amount of magnetic flux leakage due to the large number of permanent magnet poles during use, so the overall power factor of the motor is low, which will further increase the capacity of the inverter and increase the cost of the device. [0004] Patent document CN201210027944.9 discloses a permanent magnet vernier linear motor, which includes a mot...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention proposes a magnetism-concentrating alternating pole vernier permanent magnet motor, which effectively improves the motor’s resistance to air gap leakage through the combination of magnetic field modulation, alternating poles, and Halbach array principles. The use of magnetism can solve the problem of the current linear motor with complex structure and large air gap, and the magnetic field is limited. Moreover, the motor has a compact structure and has good motor thrust density and power factor.

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