Built-in permanent magnet motor rotor structure and motor with same

Abstract

The invention provides a built-in permanent magnet motor rotor structure, which comprises a rotor plate (1) and a plurality of magnetic slots (2), wherein the plurality of magnetic slots (2) are arranged in the rotor plate (1) for placing magnetic bodies (3); two polar arc angles of magnetic poles under a pair of poles of the rotor structure are defined as a first polar arc angle alpha and a second polar arc angle theta; the first polar arc angle alpha is divided into alpha1 and alpha2 by a center line of the magnetic pole; the second polar arc angle alpha is divided into theta1 and theta2 by the center line of the magnetic pole; under the pair of poles, at least one pole meets the formula: theta1 is not equal to theta2 or alpha1 is not equal to alpha2; and one pair of poles is the poles formed by the magnetic bodies in two adjacent magnetic slots. Through the built-in permanent magnet motor rotor structure, applied moments of the magnetic poles and stator tooth sockets are partially offset; the tooth socket torques and torque ripples are effectively reduced; meanwhile, the running stability and reliability of an original motor can also be maintained or improved; and the efficiency of the motor is not reduced. The invention further relates to a motor with the rotor structure.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motors, and in particular relates to a built-in permanent magnet motor rotor structure and a motor having the same. Background technique [0002] In the prior art 1, the patent CN1278472C has V-shaped grooves and trimming grooves on the outer circle of the rotor, and the trimming grooves are asymmetrical, and its rotor is composed of multiple axially misaligned iron cores, so that the cogging torque and The torque phase generated by the winding is 180° to reduce the torque ripple. However, due to the different groove structure of the outer circle of each section of the iron core, the motor process is complicated, which is not convenient for mass production, and this may lead to a decrease in motor performance and an increase in motor cost. . [0003] 2. Authorized patents CN102684337B and CN102624116B provide a motor rotor segment structure, the angle between two adjacent rotor core pole...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the existence of permanent magnet motors in the prior art that can not only effectively reduce the cogging torque and torque ripple, but also maintain the original motor performance and work efficiency. defects, thereby providing a built-in permanent magnet motor rotor structure and a motor having the same

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