Rotor and permanent magnet motor

Abstract

The invention provides a rotor and a permanent magnet motor. The rotor comprises a rotor core, and the rotor core extends axially. The rotor core is provided with a plurality of magnetic tile grooveswhich are arranged in the peripheral direction of the rotor core, and the magnetic tile grooves pass through the rotor core in the axial direction of the rotor core. The rotor also comprises a plurality of magnetic tiles, and the plurality of magnetic tiles are corresponding to the plurality of magnetic tile grooves in a one-to-one manner. Each magnetic tile passes through the corresponding magnetic tile groove, and is provided with a bulged part which is bulged outwards from the end face of the rotor core in the axial direction of the rotor core. According to the invention, the rotor core isadvantageous in that a winding current is smaller when bigger power is outputted, so as to avoid the demagnetization generated by a magnetic pole of the rotor as much as possible. Through an air guideinclined surface, the rotor is enabled to have a better heat dissipation structure, thereby prolonging the service life of the permanent magnet motor, improving the reliability of the permanent magnet motor and enlarging the application range of the permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor and a permanent magnet motor. Background technique [0002] With the rapid development of permanent magnet motor technology, more and more people pay attention to permanent magnet motors. Compared with other motors such as traditional electric excitation motors, permanent magnet motors have the advantages of high output density, high efficiency, convenient maintenance, and simple structure. . [0003] In a permanent magnet motor, in order to improve the performance of the permanent magnet motor, it is usually necessary to obtain better magnetic properties of the motor. Among the several common structures, compared with the surface-mounted and embedded rotors, the embedded rotor can effectively increase the magnetic flux area, improve the effective air gap flux, and improve the performance of the motor. [0004] refer to figure 1 with figure 2 As shown, the rotor in th...

AI Technical Summary

Problems solved by technology

[0005] However, during the operation of the permanent magnet motor using the rotor 16 in the prior art, there is a phenomenon that the rotor poles of the permanent magnet motor are demagnetized because the winding current is too large

[0006] Secondly, there is no good heat dissipation structure inside the permanent magnet motor adopting the rotor 16 in the prior art

The windings, power modules and chips of the permanent magnet motor will increase in temperature during operation due to poor heat dissipation of the motor, and long-term operation will shorten the life of the motor; If it is too high, it will cause overheat protection, stop running, and limit the range of use of the motor; in severe cases, the permanent magnet motor will even burn out, reducing the reliability of the permanent magnet motor

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