Cross-two-teeth concentrated winding vernier permanent magnetic motor

Abstract

The invention discloses a cross-two-teeth concentrated winding vernier permanent magnetic motor. The cross-two-teeth concentrated winding vernier permanent magnetic motor comprises a stator (1) and a rotor (2), wherein the stator (1) is a cylindrical body, a circumferential wall of the cylindrical body is uniformly distributed with multiple grooves, the grooves are respectively used for accommodating windings, stator teeth are formed at projection portions among the grooves on the circumferential wall of the cylindrical body, the rotor (2) is a circular body, a circumferential wall of the circular body is distributed with multiple permanent magnets with intervals, and an armature winding of the vernier permanent magnetic motor is a concentrated winding crossing two teeth. According to the cross-two-teeth concentrated winding vernier permanent magnetic motor, compared with a traditional vernier motor, a winding crossing distance is substantially reduced , an end portion is shorter, copper consumption of the motor is effectively reduced, a motor volume is reduced, and motor efficiency is improved; the cross-two-teeth concentrated winding is employed, an ultimate ratio of the vernier motor is reduced to be in a range of 2-5, a power factor of the motor can be improved to be greater than 0.8 on the condition that output torque loss is relatively small.

Description

technical field [0001] The invention belongs to the field of vernier motors, and more specifically relates to a vernier permanent magnet motor with concentrated winding across two teeth. Background technique [0002] In the context of the shortage of fossil energy, the development of new energy has become an urgent task for all countries. Among various new energy sources, wind energy has been widely studied due to its abundant sources, non-pollution, relatively mature technology, and its potential to solve the current power shortage and future energy crisis. As an important device for obtaining wind energy, wind turbines have also become a research hotspot. [0003] Due to the low speed of wind turbine blades and large input torque, in order to match the blade motion characteristics with the motor characteristics, there are two main design ideas of the existing wind turbine generators. One is to use a mechanical gearbox to drive the blades at low speed, High-torque movemen...

AI Technical Summary

Problems solved by technology

[0006] However, the existing two special winding schemes need to be combined with a special motor structure, and for such as figure 1 As shown in the conventional vernier motor topology, the existing technical solution can only use integer slot winding. This winding method leads to too long span at the end of the winding, occupies a considerable part of the stator volume, and increases the copper consumption of the motor, weakening the high Advantages of torque density, reduced motor efficiency

[0007] In addition to the excessive length of the winding end, another major disadvantage of the existing vernier motor is the low power factor. When the electric load similar to that of the traditional permanent magnet motor is used, the power factor of the vernier motor has an inverse correlation with the pole ratio, and the pole ratio The higher the number of stator teeth and the number of rotor pole pairs, the more serious the permanent magnet flux leakage and the lower the main flux. The power factor of the existing vernier motor is as low as 0.2 to 0.3

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