Modular built-in hybrid permanent-magnet motor rotor structure

Abstract

The invention discloses a modular built-in hybrid permanent-magnet motor rotor structure. The modular built-in hybrid permanent-magnet motor rotor structure comprises 3n rotor modules (n is equal to 1, 2, 3 and so on), a rotation shaft, a rare-earth permanent magnet and a non-rare earth permanent body and has the following characteristics that the 3n rotor modules comprises three types of basic rotor structures, the rotor circumference angle occupied by the three rotor modules is 120 degrees per n, permanent-magnet grooves are formed in the three rotor modules and are used for embedding the permanent magnets, the permanent-magnet grooves are respectively a V-shaped groove facing a rotor outer circle, an inverse triangular groove 1 and an inverse triangular groove 2, and the adjustment of rotor air-gap magnetic field is achieved by adjustment a placement sequence of the three types of basic rotor modules. By the modular built-in hybrid permanent-magnet motor rotor structure, the reduction of air-gap flux harmonic of a hybrid permanent-magnet motor is achieved, the permanent-magnet utilization rate is improved, a salient pole effect of the motor is improved, the cogging torque and the torque pulse are reduced, the assembly efficiency is improved, and the manufacturing process is simplified.

Description

technical field [0001] The invention relates to a permanent magnet motor rotor structure, in particular to a built-in modular hybrid permanent magnet motor rotor structure, which belongs to the technical field of motors. Background technique [0002] Permanent magnet motors have remarkable characteristics such as high power density, high efficiency, and high reliability, and have been widely used in the fields of human production and life. However, due to the shortage of rare earth permanent magnet resources, the manufacturing cost of rare earth permanent magnet motors has become a bottleneck for the large-scale application of such motors. Therefore, mixed rare earth permanent magnets have potential application prospects in permanent magnet motors, and improving the performance of such motors such as torque and efficiency has become a subject of intense research by experts and scholars at home and abroad. [0003] The built-in mixed rare earth permanent magnet motor uses tw...

AI Technical Summary

Problems solved by technology

However, due to the shortage of rare earth permanent magnet resources, the manufacturing cost of rare earth permanent magnet motors has become a bottleneck for the large-scale application of such motors

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