Rotor structure of permanent magnet synchronous motor

Abstract

The invention discloses a rotor structure of a permanent magnet synchronous motor. The rotor structure comprises an upper iron core, a lower iron core, a rotor shaft, a radially magnetized hollow cylindrical ferrite magnet, an axially magnetized annular ferrite magnet, several auxiliary ferrite magnets and several neodymium iron boron magnets. A middle hollow cylinder formed by assembling the upper iron core and the lower iron core sleeves the hollow cylindrical ferrite magnet, and the hollow cylindrical ferrite magnet sleeves the rotating shaft. The auxiliary ferrite magnets are distributed on the hollow cylindrical ferrite magnet and are embedded in slots of the upper and lower iron cores, the neodymium iron boron magnets are disposed between two adjacent auxiliary ferrite magnets, and the neodymium iron boron magnets in the upper and lower iron cores are interlaced. The annular ferrite magnet is between the upper and lower iron cores, and the inner and outer sides of the annular ferrite magnet are connected to the hollow cylindrical ferrite magnet and the auxiliary ferrite magnets to form a whole body. According to the invention, the cost of motor is reduced, and the performanceof the motor is improved.

Description

technical field [0001] The invention belongs to the technical field of motor structures, and in particular relates to a rotor structure of a permanent magnet synchronous motor. Background technique [0002] The motor is an indispensable power component in an industrialized society. The permanent magnet synchronous motor has mature technology and high reliability. It is an environmentally friendly and low-carbon motor with high efficiency and high energy density. It has no winding on the rotor, simple structure, reliable operation, suitable for high-speed operation and harsh working environment, so it has been used in various applications, such as aerospace, automobile industry and wind power generation. In recent years, due to the wide range of rotor speed adjustment, high torque density and simple structure, the advantages of permanent magnet synchronous motors have become increasingly prominent. Traditional permanent magnet motors have relatively high motor efficiency and...

AI Technical Summary

Problems solved by technology

Traditional permanent magnet motors, due to the role of permanent magnets, have relatively high motor efficiency and power density, but permanent magnets require a lot of permanent magnet materials, rare earth permanent magnet resources are scarce, and its cost limits its further development

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