Permanent magnet coreless brushless motor

Abstract

The invention discloses a permanent magnet coreless brushless motor comprising a housing, a stator and a rotor. The stator and the rotor sleeve a spindle. The stator is composed of an armature winding disc in a coreless structure. The rotor is composed of yokes, each which comprises a plurality of magnets. The yokes and the armature winding disc are both in disc structures. The yokes are arranged on left and right sides of the armature winding disc respectively. Air gaps between the armature winding disc and the yokes on two sides thereof are equal in magnetic density. The magnets on the yokes are in one-to-one correspondence; each adjacent two of the magnets are opposite in polarity; the magnets on the yokes form an axial magnetic field; the magnets on each yoke are evenly distributed on the yoke in a circle in an alternate N-S pole form. The permanent magnet coreless brushless motor is small in size and light in weight; through the coreless armature structure, cogging torque and iron loss of the traditional motor can be effectively avoided.

Description

technical field [0001] The invention belongs to the field of permanent magnet brushless motors, in particular to a permanent magnet ironless brushless motor. Background technique [0002] At present, when the existing iron-core motor is working, the efficiency of the current-carrying wire to effectively cut the magnetic field in the rotor magnetic field is not high; because the winding has an iron core, hysteresis loss, eddy current loss and residual loss are generated during the rotation of the motor, causing the motor to start Large current, low efficiency and poor energy saving effect. Limited by the structure of the motor, the weight and volume are relatively large, and a large amount of silicon steel sheets are consumed. Contents of the invention [0003] In order to solve the problems in the prior art, the object of the present invention is to provide a permanent magnet ironless brushless motor, which is small in size and light in weight, and can effectively avoid t...

AI Technical Summary

Problems solved by technology

[0002] At present, when the existing iron-core motor is working, the efficiency of the current-carrying wire to effectively cut the magnetic field in the rotor magnetic field is not high; because the winding has an iron core, hysteresis loss, eddy current loss and residual loss are generated during the rotation of the motor, causing the motor to start High current, low efficiency and poor energy saving effect

Limited by the structure of the motor, the weight and volume are relatively large, and a large amount of silicon steel sheets are consumed

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