Concentrated-winding motor, generator and motor

Abstract

The invention relates to concentrated-winding permangent magnet motors, in particular to a concentrated-winding motor, a generator and a motor. Magnets adhere to a rotor yoke of the concentrated-winding motor, wherein the distance between every two steel magnets is Sm, the N poles of the steel magnets and the S poles of the steel magnets are distributed alternately, and the number of the steel magnets is 2P. A stator core is provided with Z grooves and Z stator teeth, the width Sc of a notch between every two adjacent stator teeth of the concentrated-winding motor and the distance Sm between every two adjacent steel magnets meet the constraint relationship Sm / Sc=(0.83-1.3), and the ratio of the width of each steel magnet to the pole pitch tau of each steel magnet meets the constraint relationship taum / tau >=(0.75-0.9), wherein the pole pitch tau is equal to 360 degrees / 2P, and P is the number of pole pairs of the motor. According to the concentrated-winding motor, the interval-adhering type steel magnets are adopted, materials are saved, an air-gap magnetic field is good in sine, the location torque of the motor is small, and the notches of the motor can fully meet the requirements of direct full-automatic winding.

Description

technical field [0001] The invention relates to a permanent magnet motor with concentrated winding, in particular to a concentrated winding motor, generator and motor. Background technique [0002] The rotors of permanent magnet motors generally use rare earth permanent magnets, such as NdFeB permanent magnets. Rare earth permanent magnet materials are becoming scarcer and more expensive, so it is necessary to reduce the amount of permanent magnets and improve the utilization rate of permanent magnets. [0003] Permanent magnet motors with concentrated windings can significantly improve the power and energy indicators of permanent magnet motors, such as: winding utilization, efficiency, power volume ratio, torque volume ratio, etc., and improve the motor manufacturing process. [0004] However, the excessively large cogging torque is still a problem for concentrated winding permanent magnet motors. The optimal number of magnetic poles and cogging slots can suppress the cogg...

AI Technical Summary

Problems solved by technology

Therefore, the most effective measure for the traditional distributed winding permanent magnet motor to suppress the positioning torque, the concentrated winding permanent magnet motor cannot be used, and the excessive positioning torque of the concentrated winding permanent magnet motor is still a big problem

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