Built-in hybrid permanent magnet motor

Abstract

The invention discloses a built-in hybrid permanent magnet motor. V-shaped grooves (2) are formed in the circumferential direction of a rotor (2); each side of the V-shaped groove is divided into an upper rectangular structure and a lower rectangular structure; the two rectangular structures are divided into a large rectangular structure (8) and a small rectangular structure (7); permanent magnetsmade of ferrite and neodymium iron boron are arranged in the grooves separately; Z-shaped reinforcing ribs (5) are arranged at the bottoms of the V-shaped grooves; a horizontal line-shaped groove (3)is formed between each V-shaped groove and the outer edge of the rotor; a neodymium-iron-boron permanent magnet (4) is placed in each horizontal line-shaped groove; a vertical magnetizing mode is adopted for all the permanent magnets; the V-shaped grooves and the horizontal line-shaped grooves form a group of groove structures; and a sickle-shaped magnetic isolation bridge (6) is arranged betweenthe two groups of groove structures. According to the built-in hybrid permanent magnet motor, the permanent magnet structures with different materials are arranged asymmetrically, so that the utilization rate, the output torque and efficiency of the permanent magnets of the motor are improved, and the torque pulsation is lowered.

Description

technical field [0001] The invention belongs to the technical field of motors and relates to a built-in hybrid permanent magnet motor. Background technique [0002] At present, the whole world is paying great attention to the issue of efficient energy utilization. How to achieve efficient energy utilization has become the theme of world development; at present, there is still a problem of relatively low energy utilization in industrial motors. By improving the efficiency of industrial motors, significant efficient use of energy. Since the built-in permanent magnet motor adopts permanent magnet excitation and has no rotor resistance loss during stable operation, it can effectively reduce the total loss, so it has great room for efficiency improvement and advantages. According to the characteristics of the interior hybrid permanent magnet motor, the electromagnetic performance such as the efficiency of the interior hybrid permanent magnet motor can be improved by optimizing t...

AI Technical Summary

Problems solved by technology

By using a variety of permanent magnet materials for mixed excitation, and reasonably setting the magnetic isolation bridge on the rotor, the torque utilization rate of the motor can be improved and the torque ripple can be reduced; but the unreasonable permanent magnet arrangement and the design of the magnetic isolation bridge , not only cannot improve the performance of the motor, but may cause greater energy loss; therefore, a reasonable arrangement of permanent magnets and the shape design of the magnetic isolation bridge have positive significance for improving the torque output of the motor and the efficiency of the motor

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