Modular electrically-excited doubly-salient motor

Abstract

The invention discloses a modular electrically-excited doubly-salient motor which comprises a shell, stator iron cores, excitation windings, phase-A armature windings, phase-B armature windings, phase-C armature windings, a rotor iron core and a rotary shaft. The shell is made of non-magnetic-permeability materials, and the stator iron cores are fixed to the inner side of the shell; each of the 3X modular stator iron cores is provided with two protruded stator poles which are connected with each other by stator yokes, and the various stator iron cores are not in direct contact with one another; the 6X stator iron cores are peripherally uniformly distributed; 5X protruded rotor poles are uniformly distributed on the rotor iron core; the polar distance between every two corresponding stator poles on the same stator iron core is equal to the polar distance of every corresponding rotor poles; the corresponding excitation winding is wound on one of the stator poles of each stator iron core, the corresponding armature winding is wound on the other stator pole of each stator iron core, and the armature windings are divided into the phase-A armature windings, the phase-B armature windings and the phase-C armature windings according to difference of phases; the X is a positive integer. The modular electrically-excited doubly-salient motor has the advantages that magnetic circuits and circuits of three-phase windings of the modular electrically-excited doubly-salient motor are independent from one another, accordingly, faults can be constrained in one phase, influence of the faults on the other phases can be reduced, and the faults can be prevented from being propagated.

Description

technical field [0001] The invention relates to a modular electric excitation double salient pole motor, which belongs to the technical field of special motors. Background technique [0002] When a phase winding of a traditional distributed winding motor is short-circuited, the short-circuit flux linkage will pass through other normal phase windings, thereby distorting the normal phase winding flux linkage and induced electromotive force, thereby affecting the system performance of the motor. Therefore, fault-tolerant motors should have electrical isolation, magnetic isolation, thermal isolation, and physical isolation capabilities. [0003] Isolation mainly includes magnetic isolation, thermal isolation, electrical isolation, physical isolation, etc. Isolation can ensure that the failure of the subsystem does not spread, so that the remaining subsystems can operate fault-tolerantly, which is the basic technical feature that the fault-tolerant motor should have. [0004] In...

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Problems solved by technology

[0007] Southeast University has conducted research on modular linear motors, but the primary of the linear motor itself is one or more independent modules that do not form a circle, so this technology cannot be applied to the design of modular electric excitation double salient pole motors

In addition, Southeast University has also obtained the invention patent of "a stator surface-mounted double salient pole permanent magnet motor with a modular rotor", the patent number: 2013101199395. The rotor of this technology has multiple isolated modules, and the stator cannot be realized. phase separation

[0008] The traditional electrically excited doubly salient pole motor excitation winding spans three poles, and it is impossible to divide the three-phase excitation winding into three modules, so it is necessary to propose a new topology to realize the modularization of the electrically excited doubly salient pole motor design

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