Novel permanent magnet synchronous motor rotor structure

Abstract

The invention relates to the technical field of motors, and provides a novel permanent magnet synchronous motor rotor structure. The structure is high in motor rotor structural strength and wide in flux-weakening speed regulation range. The motor rotor is of a six-pole structure, six-pole magnetic circuits are completely symmetrical, each pole of permanent magnet is of a sectional structure and is composed of three permanent magnets including a main permanent magnet and an auxiliary permanent magnet, magnetism-assisting soft iron and a magnetism-isolating baffle are embedded in each pole of permanent magnet, a magnetic barrier is embedded in the outer side of the rotor, and a non-magnetic material is embedded in the inner side of the rotor. The permanent magnets are embedded into the magnetism-assisting soft iron in a segmented mode, the structural strength is improved, the motor is more suitable for running at a high speed, the magnetic flux leakage of the motor is reduced through the magnetism-isolating baffles, and the fundamental waveform of an air-gap magnetic field is optimized. The magnetic barrier and the non-magnetic conductive material further enhance the structural strength of the motor rotor, improve the air-gap flux density waveform of the motor, reduce the air-gap magnetic field harmonic wave and torque ripple of the motor, and facilitate the expansion of the speed regulation range of the motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a novel permanent magnet synchronous motor rotor structure. Background technique [0002] With the development of permanent magnet materials, permanent magnet synchronous motors with the advantages of simple structure, reliable operation, small size, light weight, high efficiency and power density are increasingly widely used in equipment manufacturing, rail transit, new energy and other fields. [0003] However, due to the difficulty in adjusting the magnetic field of permanent magnets, many occasions require a wide range of motor speed regulation, which limits the further application of permanent magnet synchronous motors in CNC machine tool spindle systems and electric vehicle drive systems where the speed regulation range is high. It has far-reaching significance to provide a new type of permanent magnet synchronous motor rotor structure with high structural strength and wide ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the difficulty in adjusting the magnetic field of permanent magnets, many occasions require a wide range of motor speed regulation, which limits the further application of permanent magnet synchronous motors to occasions with high speed regulation range requirements such as CNC machine tool spindle systems and electric vehicle drive systems.

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