Rotor sheath of high-speed permanent magnet motor

Abstract

The invention discloses a rotor sheath of a high-speed permanent magnet motor, relates to a structure of a rotor of the high-speed permanent magnet motor, belongs to the field of the motor, and aims to solve the problem that eddy-current loss is increased by arranging the sheath on the rotor side of the existing high-speed permanent magnet motor to cause temperature rise of the rotor and further cause demagnetization of a permanent magnet in the rotor so as to damage the motor body. The rotor sheath of the high-speed permanent magnet motor comprises a rotor sheath cylinder, and is characterized in that a plurality of rotary grooves are uniformly distributed around the outer surface of the rotor sheath cylinder. According to the rotor sheath of the high-speed permanent magnet motor, a plurality of convex blocks are uniformly and fixedly arranged on the two end faces of the sheath cylinder. The rotor sheath is suitable for improving the rotor sheath of the high-speed permanent magnet motor in service in existing industries, and meanwhile suitable for reproducing and machining the high-speed permanent magnet motor.

Description

technical field [0001] The invention relates to the field of motors, in particular to a rotor sheath of a high-speed permanent magnet motor. Background technique [0002] Surface-mounted high-speed permanent magnet brushless motors often have a layer of high-strength non-magnetic sheath outside the permanent magnet to protect the high-speed rotating permanent magnet. The sheath can be metal, such as stainless steel, titanium alloy, nickel alloy, etc., or non-metallic material, such as glass fiber, carbon fiber, etc. The electrical conductivity of the metal sheath is large, and a large eddy current loss will be generated in the sheath, while the electrical conductivity of the non-metallic material is low, and the eddy current loss is relatively small. At the same time, since the eddy current of the protective sheath has a shielding effect on the magnetic field of the permanent magnet and the rotating shaft, the eddy current loss of the permanent magnet of the rotor and th...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of the existing high-speed permanent magnet motor rotor side with a sheath, the eddy current loss is too high and the rotor temperature rises too high, causing the permanent magnet on the rotor side to lose magnetism, etc., the present invention designs a high-speed permanent magnet motor rotor sheath

Images