Coil winding, combined winding and permanent magnet motor without groove and framework

Abstract

The invention discloses a coil winding, a combined winding and a permanent magnet motor without a groove and a framework. The coil winding is formed by uniformly distributing 3*N groups of coils along the circumference and is a round barrel-shaped winding with an edge and no cover; and the combined winding is formed by two II type coil windings in a mutual nesting way or one I type coil winding and one II type coil winding in a mutual nesting way. According to the coil winding, the combined winding and the permanent magnet motor without the groove and the framework, the structure is ingenious, the appearance is attractive, and high tankful rate of the motor can be realized.

Description

technical field [0001] The invention relates to a coil winding, a combined winding and a slotless and frameless permanent magnet motor. Background technique [0002] The brushless permanent magnet motor adopts a slotless structure, which overcomes the defects of the cogging structure, expands the distribution space of the coil winding, and makes the motor run smoothly, with a high power-to-weight ratio, low noise, and reliable working performance. However, due to the limitations of the coil winding structure and winding process, the brushless permanent magnet motor with a slotless structure still has low power density, large loss, and high temperature rise, so it cannot achieve high efficiency. [0003] In order to achieve high efficiency of the slotless brushless permanent magnet motor, the existing technology [such as patent CN101982930A, high efficiency three-phase slotless permanent magnet motor, application number 2010105382343] is to use non-magnetic materials in the s...

AI Technical Summary

Problems solved by technology

When the proportion of the thin-walled cylindrical frame with slots embedded in the motor is negligibly small relative to the internal space occupied by the motor, this technology solves the problems of low winding slot fullness, low power density, and large loss in previous slotless motors. , temperature rise and other issues

However, for micro-sized permanent magnet motors, due to the constraints of the small internal space of the motor itself, the existence of the thin-walled and slotted skeleton in the motor relatively occupies a large internal space of the motor, and the smaller the motor volume, the relative occupation ratio The higher it is, the slot full rate and power density of the motor will naturally drop significantly.

Obviously, in this situation, this technology cannot achieve the purpose of making slotless brushless permanent magnet motors highly efficient

In addition, the coil winding and embedding methods of this technology follow the traditional production process of slotted motor windings, which is complicated in process and low in production efficiency

[0004] In general, the adoption of the slotless structure technology of brushless permanent magnet motors overcomes the defects of the slotted structure; the adoption of the slotless structure technology of thin-walled cylindrical slotted skeletons further solves the problem of winding slots in slotless motors. Problems such as low full rate and low power density make the brushless permanent magnet motor achieve high efficiency, but its effect is obviously limited and restricted by the relative space ratio of the skeleton in the motor, and the process is complicated and the production efficiency is low.

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