Rotor of permanent magnet motor

Abstract

The invention discloses a rotor of a permanent magnet motor. The rotor comprises a rotor iron core, a shaft, magnetic steel, a front baffle and a rear baffle, wherein the center of the rotor iron coreis provided with a shaft hole allowing the shaft to be tightly pressed into the shaft hole, magnetic steel grooves are evenly formed in the circumferential direction of the outer edge of the rotor iron core, and pressing tables are symmetrically arranged at the positions, on the left side and right side of the upper end of the magnetic steel grooves, on the outer edge of the rotor iron core; a pin groove is formed in the boundary of the pressing table on each side and the corresponding magnetic steel groove; pins are tightly pressed into the pin grooves, springs are inserted in the pins, andthe magnetic steel is arranged in the magnetic steel grooves and comprises inner magnetic steel parts, square connecting parts and outer magnetic steel parts; the outer walls of the two sides of eachinner magnetic steel part are both provided with two semicircular notches, the counter of the semicircular notches is matched with that of the outer walls of the pins, and each inner magnetic steel part is tightly pressed into and attached to the bottom face of the corresponding magnetic steel groove along four pins; the upper end faces of the inner magnetic steel parts are flush with the pressingtables, and the upper end faces of the inner magnetic steel parts are in pressed connection through the front baffle and the rear baffle. The magnetic steel is convenient and reliable to install andfix, the cost is low, and the performance of the motor is improved.

Description

technical field [0001] The invention relates to the field of motor rotors, in particular to a permanent magnet motor rotor. Background technique [0002] With the continuous improvement of the performance of permanent magnet materials and the development of motor technology, permanent magnet motors have been widely used in various fields of the national economy, and permanent magnet rotors are an important part of permanent magnet motors. [0003] The magnetic steel of the permanent magnet rotor is mainly divided into two types: surface mount type and built-in type. Compared with the built-in permanent magnet rotor, the surface-mounted permanent magnet rotor has a small field-weakening speed regulation range and low power density, but it has the characteristics of fast dynamic response and small torque ripple, and is suitable for servo drive. The built-in permanent magnet rotor superimposes the reluctance torque on the basis of the permanent magnet torque. The existence of ...

AI Technical Summary

Problems solved by technology

[0004] The current magnetic steel is pasted on the rotating shaft in pieces, which is expensive, and it is easy to fall off after a long time running, so it needs to be improved

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