Hybrid excitation type high-speed permanent magnet motor rotor and manufacturing method

Abstract

The invention discloses a hybrid excitation type high-speed permanent magnet motor rotor and a manufacturing method. The hybrid excitation type high-speed permanent magnet motor rotor comprises a rotating shaft, a sintered permanent magnet unit, a magnetic powder adhesive film and carbon fiber composite unit and a rotor sheath which are sequentially arranged from inside to outside in the radial direction, wherein the sintered permanent magnet unit is composed of sintered permanent magnet blocks, epoxy resin filler and a carbon fiber layer, the sintered permanent magnet blocks are equal in axial length and unequal in radial thickness, and each magnetic pole of the high-speed permanent magnet motor rotor is formed by the sintered permanent magnet blocks in the circumferential direction according to the arrangement mode that the middle is high and the two ends are low; and the magnetic powder adhesive film and carbon fiber composite unit consists of a plurality of magnetic powder adhesivefilm and carbon fiber composite subunits composed of magnetic powder adhesive film layers and carbon fiber layers, the number of the magnetic powder adhesive film layers and the number of the carbonfiber layers are different, and the sum of the number of the magnetic powder adhesive film layers and the number of the carbon fiber layers is not changed. According to the hybrid excitation type high-speed permanent magnet motor rotor and the manufacturing method, the mechanical strength of the motor rotor can be improved, the eddy current loss of the motor rotor is reduced, and the allowable linear speed of the motor rotor is improved, thereby solving the problems of large eddy current loss, high temperature rise and low allowable linear speed of the traditional high-speed permanent magnet motor rotor.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a hybrid excitation type high-speed permanent magnet motor rotor and a manufacturing method thereof. The rotor can be applied to high-speed permanent magnet motors. Background technique [0002] The high-speed motor system has significant advantages such as high power density and reliability, small size, light weight and easy realization of high-speed direct drive (without gearbox), which is very suitable for and can meet the special requirements of high-end equipment and green manufacturing. It is used in high-speed grinding machines, air Circulating refrigeration systems, energy storage flywheels, high-speed centrifugal compressors for natural gas transmission, and distributed power generation systems as aircraft or shipboard power supply equipment have broad application prospects. [0003] At present, there are mainly three types of high-speed motors: induction moto...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly three types of high-speed motors: induction motors, switched reluctance motors and permanent magnet motors. Permanent magnet motors are especially suitable for high-speed and high-performance motor systems due to their outstanding advantages such as high efficiency and power factor, and wide speed operating range. It has become the mainstream of high-speed motor research and application, but the existing high-speed permanent magnet motor has high rotor loss, high temperature rise, difficult to ensure reliable mechanical strength, and low allowable linear speed, which limits its development to higher power and higher speed

In addition, due to the limitations of rotor strength and temperature rise, it is difficult to further improve the difficulty factor and operating quality (high power, high speed, high efficiency, high power factor, etc.) of existing high-speed permanent magnet motors. It is necessary to explore A New Rotor Topology for High Speed ​​Permanent Magnet Motors

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