Ring winding magnetic field modulation linear motor

Abstract

The invention discloses a ring winding magnetic field modulation linear motor, which belongs to the field of motors and solves the problems of material waste, complicated insulation process between windings, large motor thrust fluctuation and low frequency caused by the long end part of the traditional linear permanent magnet motor winding and the winding mode of the winding. The ring winding magnetic field modulation linear motor comprises a primary winding and a secondary winding, a gap exists between the primary winding and the secondary winding, by adopting pole-slot match between the primary winding and the secondary winding and the ring winding, non-uniform air gap permeance plays a role of pole changing, the magnetic motive force of the primary winding and the air gap permeance interact mutually, a magnetic field with the same pole number as secondary permanent magnets is generated, the two magnetic fields interact mutually to generate a constant thrust, and thus, the limitation that the pole number of the primary winding and the pole number of the secondary winding of the traditional linear permanent magnet synchronous motor need to be the same is further broken. The pole-pairs number P of the secondary permanent magnets, the slot number Q per side of the primary winding and the pole-pairs number S of the primary winding fundamental magnetic motive force meet the following relationship: P=Q+ / -S. The ring winding magnetic field modulation linear motor can be applied to low speed, great acceleration, high output thrust and other situations.

Description

technical field [0001] The invention belongs to the field of motors. Background technique [0002] The armature core tooth pitch τ of the traditional single-sided flat three-phase linear permanent magnet synchronous motor t The pole distance τ from the permanent magnet p Satisfy the relation 3τ t =τ p , a coil side is embedded in each slot, and the coil pitch is equal to the pole pitch. This winding structure is called an integer slot single-layer winding. The winding of the motor is as figure 1 As shown, the coil of the A-phase winding is wound in the first slot and the fourth slot, while crossing the second and third slots, and the coil of the C-phase winding is wound in the second and fifth slots. Wraps inside the slot, while crossing the third and fourth slots, and so on. The main problem of this type of winding is that the ends of the winding coils of each phase exposed outside the core teeth are relatively long, and the winding coils of each phase cross each othe...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of the end length of the winding of the traditional linear permanent magnet motor and the waste of materials caused by the winding mode of the winding, the complicated insulation process between the windings, the large fluctuation of the thrust of the motor and the low efficiency. The present invention provides a ring winding magnetic field Modulate the linear motor, the implementation form of the motor is as follows:

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