Surface-mounted rotor and motor

Abstract

The invention discloses a surface-mounted rotor that is connected with a rotating shaft of the motor. The surface-mounted rotor comprises a plurality of laminations that are arranged side by side and are connected in a welding mode; the plurality of laminations form a cylindrical main body of the surface-mounted rotor; a plurality of lightening holes are arranged in the cylindrical main body; a plurality of grooves are arranged at side surfaces of the cylindrical main body and are extended along the axial direction of the cylindrical main body; and permanent magnets are arranged on the grooves. According to the provided surface-mounted rotor and the provided motor, the plurality of laminations are welded to form the surface-mounted rotor, thereby effectively improving a heat radiation effect of the rotor. Meanwhile, because the lightening holes are arranged on each of the laminations, weight can be effectively reduced. Besides, the grooves are arranged on the rotor and are used to place the permanent magnets.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a surface-mounted rotor and a motor. Background technique [0002] In the field of motors, permanent magnet synchronous motors have become the most potential motor form in this field because of their advantages such as high torque density and high efficiency. [0003] The characteristic of permanent magnet synchronous motors usually lies in its rotor. At present, the widely used rotor punching forms are V-shaped permanent magnet structure and inline permanent magnet. Motors with a V-shaped permanent magnet structure generally have high mechanical strength of the rotor, and are especially suitable for high-speed applications. But in this structure, due to the weakness of the magnetic circuit itself, the path of the magnetic force lines in the radial direction of the motor is too long, and in the motor rotor, this method will increase the amount of silicon steel sheets used in the ...

AI Technical Summary

Problems solved by technology

But with this structure, due to the weakness of the magnetic circuit itself, the path of the magnetic force lines in the radial direction of the motor is too long, and in the motor rotor, this approach will increase the amount of silicon steel sheets used in the motor rotor

lead to an increase in the weight of the entire structure

This is not conducive to reducing the weight of the power system for vehicle motors

[0004] For a rotor with an inline permanent magnet structure, the performance of the magnets will be weakened due to the short circuit between the two permanent magnets in the middle of each permanent magnet

At the same time, because the air-gap magnetic density waveform of the magnetic field generated by it is not good, it is difficult to be used in high-frequency current occasions without special design.

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