Dual-rotor, single-stator, unyoked and high-torque density permanent-magnet motor with penetrating radial magnetic path

Abstract

The invention disclose a dual-rotor, single-stator, unyoked and high-torque density permanent-magnet motor with a penetrating radial magnetic path. The dual-rotor, single-stator, unyoked and high-torque density permanent-magnet motor comprises a motor shaft, wherein the motor shaft is a hollow shaft, a left bearing and a right bearing are respectively connected to a left side and a right side of the motor shaft, a left rotation rack and a right rotation rack are respectively connected to the left bearing and the right bearing, an enclosure is connected between the left rotation rack and the right rotation rack, a stator assembly is connected to the motor shaft and is arranged between the left bearing and the right bearing, the left rotation rack extends towards an inner side to form an inner rotor fixed rack, a plurality of inner rotor magnetic steel is connected onto the inner rotor fixed rack by inner rotor magnetic yoke, and a plurality of outer rotor magnetic steel is connected toan inner side of the enclosure by outer rotor magnetic yokes. The dual-rotor, single-stator, unyoked and high-torque density permanent-magnet motor is simple in structure; by structural matching of dual rotors and a single stator, the dual-rotor, single-stator, unyoked and high-torque density permanent-magnet motor has high torque density and is high in reliability and controllability, and the vibration and the noise during running of the motor are reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a penetrating radial magnetic circuit double rotor single stator yokeless high torque density permanent magnet motor. Background technique [0002] In recent years, permanent magnet motors have been more and more widely used in the fields of economy and national defense, and their technology is becoming more and more mature. At present, permanent magnet motors are usually required to have the advantages of high torque density, high linearity and high efficiency. [0003] In terms of increasing the torque density, the current common method is to increase the notch of the motor stator core or adopt a straight tooth structure, that is, to reduce or remove the tooth crown on the traditional stator punching sheet, which has the advantage of significantly reducing the flux leakage of the notch. The saturation degree of the motor magnetic circuit can be reduced, and the main magnetic fl...

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Problems solved by technology

[0003] In terms of increasing the torque density, the current common method is to increase the notch of the motor stator core or adopt a straight tooth structure, that is, to reduce or remove the tooth crown on the traditional stator punching sheet, which has the advantage of significantly reducing the flux leakage of the notch. The saturation degree of the motor magnetic circuit can be reduced, and the main magnetic flux of the armature reaction can be increased at the same time, so the torque density of the motor can be greatly improved; but the disadvantage of this structure is that the slot width of the motor stator is large, and the permanent magnet on the rotor Large eddy current loss will be generated. For the wound stator core with concentrated winding, the large slot or straight tooth structure lacks the position limit of the crown to the coil conductor, which increases the difficulty of motor manufacturing.

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