Four-phase block rotor pole electro-magnetic doubly salient motor

Abstract

The invention relates to a four-phase block rotor pole electro-magnetic doubly salient motor. The stator core is provided with 12 uniformly distributed salient stator poles which are identical in rootpole width. The tops of the 12 salient stator poles are widened outward to form a pole arc structure. The angle of the pole arc structure width is 22 degrees. The rotor core is provided with 9 sectorblock rotor poles. The angle of the sector top width is 32 degrees, and the angle of the bottom width is 17 degrees. A set of armature windings and a set of excitation windings are wound around the stator poles. The distributed excitation mode is used, the excitation windings are uniformly distributed on each stator pole and the generated magnetic circuit is symmetrical so that the problems of asymmetrical four-phase flux linkage, unbalanced electromagnetic force and large torque ripple in the centralized excitation mode can be solved. The rotor block structure is used and the maximum flux value is greater than that of the conventional structure doubly salient motor. The motor is externally connected with four-phase bridge current to form a DC generator so as to have the characteristics of high reliability, convenient voltage regulation and long-term operation.

Description

technical field [0001] The invention relates to a double salient pole motor, in particular to an electrically excited double salient pole motor. Background technique [0002] The double salient pole motor is a kind of variable reluctance motor. Its principle is to use the salient poles of the stator and rotor to make the magnetic permeability of the motor change continuously with the movement of the rotor to generate electromotive force. Due to its simple structure, reliable operation, and ability to operate under harsh conditions, doubly salient motors have received more and more attention in the aerospace field. The starter / generator formed by it can not only be used as a DC power supply, but also can be used for variable speed and constant frequency Inverter alternator for power supply. In recent years, double salient motors have been widely used in new energy power generation, vehicle drive systems and fuel pump systems. The structure and manufacturing process of the m...

AI Technical Summary

Problems solved by technology

[0004] Based on the traditional electrically excited double salient pole motor, the present invention proposes a four-phase segmented rotor pole electrically excited double salient pole motor for its existing shortcomings and shortcomings. Excitation doubly salient pole motors have large torque ripple, large rotor core mass, and high loss. It can effectively reduce the length of the magnetic flux path, increase the magnetic flux, increase the torque, and reduce torque ripple and loss.

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