Fractional-slot concentrated winding permanent magnet synchronous motor and design method thereof for improving reluctance torque

Abstract

The invention discloses fractional-slot concentrated winding permanent magnet synchronous motor and a design method thereof for improving reluctance torque. The fractional-slot concentrated winding permanent magnet synchronous motor comprises a stator and a rotor, wherein the stator is slotted along the peripheral direction to form fault-tolerant teeth and armature teeth arranged alternately; an armature winding is wound on the armature teeth, the fault-tolerant teeth and the armature teeth are different in widths, and the widths of the armature teeth are wider than those of the fault-tolerantteeth; the rotor consists of a permanent magnet, a rotor core and a magnetic obstacle, the permanent magnet is a double-layer permanent magnet, the rotor core is composed of a plurality of independent units, and during machining, the rotor is wrapped with a non-metal material to form a compact structure. The rotor core is segmented along the axis pole direction of the permanent magnet, and the width of the upper part of the magnetic obstacle during segmentation is narrower than that of the lower part. The permanent magnet synchronous motor has the advantages that the direct-axis inductance can be reduced through the special magnetic obstacle design, the influence on quadrature axis inductance can also be reduced as much as possible, and the subharmonic of the motor is free of obvious inhibition. Therefore, the reluctance torque of the motor can be improved effectively, and the iron loss and eddy-current loss of the motor are reduced.

Description

technical field [0001] The invention relates to a motor manufacturing technology, in particular to a technology for improving the reluctance torque of a fractional slot concentrated winding permanent magnet synchronous motor. Background technique [0002] The fractional slot concentrated winding permanent magnet synchronous motor has many characteristics such as short winding ends, low copper consumption, high efficiency, and good fault tolerance. Therefore, it has good application scenarios in many occasions such as aerospace, ship propulsion, and industrial drives. At present, the biggest challenge facing permanent magnet synchronous motors with fractional slot concentrated windings is the improvement of reluctance torque. The main component of the torque of the traditional fractional slot concentrated winding permanent magnet synchronous motor is the permanent magnet torque, which makes it difficult for the motor to weaken the field at high speed, thus limiting the speed ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low reluctance torque of permanent magnet synchronous motor with fractional slot concentrated winding, and propose a simple, effective and easy-to-execute method

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