High-speed permanent magnet motor rotor structure and motor

Abstract

The present invention relates to a high-speed permanent magnet motor rotor structure. The high-Speed permanent magnet motor rotor structure comprises a rotor core, permanent magnets, a rotor sheath, a rotor fan and limiting guide bars; a layer of V-shaped permanent magnet mounting grooves is evenly distributed on the rotor core along the circumferential direction of the rotor core; the openings of the V-shaped permanent magnet mounting grooves face the stator; two axial ends of the rotor core are provided with an end plate I and an end plate II respectively; the external side of the end plate I at one side of the rotor core is provided with the rotor fan; and the end plate I and an end plate II are made of non-magnetic conductive stainless steel or other high-strength non-magnetic conductive materials. According to the high-speed permanent magnet motor rotor structure of the invention, the non-magnetic conductive limiting guide bars are arranged at two ends of each V-shaped magnetic pole, so that the positions of the permanent magnets in the grooves can be limited; the permanent magnets are distributed along an axial direction and a radial direction, and therefore, eddy current generated by the permanent magnets can be decreased, and stress borne by the permanent magnets in the grooves can be decreased; and weight reducing holes and the fan are adopted, and therefore, the weight of the rotor can be reduced, and air cooling channels can be decreased. The present invention also relates to a motor comprising the high-speed permanent magnet motor rotor structure.

Description

technical field [0001] The invention relates to the field of motors, in particular to a rotor structure of a high-speed permanent magnet motor and the motor. Background technique [0002] With the increasingly serious problems of the environment and energy crisis, high-efficiency and energy-saving electrical equipment has become a development trend, which greatly promotes the development of high-power-density, high-efficiency rare earth permanent magnet synchronous motors. In the field of vehicles, due to space and weight constraints, permanent magnet motors are required to be small in size and light in weight. Therefore, more and more vehicle-mounted permanent magnet motors begin to use high-speed permanent magnet motors. High-speed permanent magnet motors are different from ordinary permanent magnet motors. The essential difference lies in the rotor structure. Application No. CN201510267300.0 "A Permanent Magnet Fixing Structure for a Surface-Mounted High-Speed ​​Permanen...

AI Technical Summary

Problems solved by technology

This solution needs to install two kinds of permanent magnets, each magnetic pole needs to open two sets of V-shaped grooves, the structure is complex, and the workmanship is poor; the amplitude of the air gap flux density becomes smaller due to the small residual magnetism of the ferrite, which makes the motor The output capacity is reduced; in addition, there is no sheath outside the rotor in this scheme, and when the silicon steel sheet iron core is used, the strength of the rotor at high speed operation cannot be guaranteed

Images