Multi-disc and multi-gap axial flux magnetic field modulation permanent-magnet motor with high torque density
A permanent magnet motor and magnetic field modulation technology, which is applied in the direction of electromechanical devices, electrical components, magnetic circuit rotating parts, etc., can solve the problems of high copper consumption of motors and low overall torque density, so as to improve efficiency and increase overall torque Density, Effect of High Electromagnetic Torque Density
Active Publication Date: 2016-04-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0003] Aiming at the lack of performance of existing magnetic field modulation motors, the present invention proposes a high torque density multi-disk-multi-air gap axial flux magnetic field modulation permanent magnet motor, which is used to solve the problem of high copper consumption and low overall torque density of the motor shortcoming
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[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0013] The characteristics and working principle of the motor will be described in detail below in conjunction with the accompanying drawings.
[0014] Taking the three-phase five-disk axial flux magnetic field modulation motor as an example, assuming that the number of stator teeth is 24, the number of rotor pole pairs is 22, and the number of stator armature pole pairs is 2, figure 1 It is a ...
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The invention provides a multi-disc and multi-gap axial flux magnetic field modulation permanent-magnet motor with high torque density. The permanent-magnet motor has a multi-disc and multi-gap structure and comprises a plurality of stators and rotors, which are sequentially arranged in a staggered manner along the axial direction; if the number of the stators is Ns and the number of the rotors is Nr, the stators and the rotors meet the following expression: Ns=Nr+1 (Nr=2, 3, 4 ...); no winding is placed on two stators at the outmost side; and annular windings are placed on the stators at the inner side. According to the modulation permanent-magnet motor provided by the invention, the lengths of the end parts of the windings are reduced; the copper loss of the motor is reduced; the efficiency is improved; with the outer stators at two sides as auxiliary magnetic circuits, the characteristics of high electromagnetic torque density, high power factor and the like of the magnetic field modulation motor are reserved; and the overall torque density of the motor is improved. Meanwhile, the outer stators at two sides can be directly connected with a machine case, so that modulation permanent-magnet motor is easy to assemble.
Description
technical field [0001] The invention belongs to the field of permanent magnet motors, and more specifically relates to a high torque density multi-disk-multi-air gap axial flux magnetic field modulation permanent magnet motor. Background technique [0002] Field-modulated permanent magnet motors have the advantages of low cogging torque and torque ripple, small counter electromotive force harmonics, high electromagnetic torque density, and saving magnets, etc., and have attracted the attention of researchers since they were proposed. Compared with conventional motors, due to its unique magnetic field modulation effect, the magnetic field modulation motor can modulate the multi-pole magnetic field of the rotor into a few-pole magnetic field in the stator yoke through modulation units such as modulation rings or stator teeth, and has low-speed and high-torque work characteristics. However, due to the small number of stator poles of the magnetic field modulation motor, the win...
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IPC IPC(8): H02K16/00H02K3/28H02K1/27
CPCH02K1/27H02K3/28H02K16/00
Inventor 曲荣海李健肖林元
Owner HUAZHONG UNIV OF SCI & TECH