Axial excitation double salient pole motors

Abstract

The invention discloses two axial excitation double salient pole motors and belongs to the field of motors with double salient pole structures. Each motor comprises at least two double salient pole monomer structures which are axially arranged, wherein each monomer structure consists of a salient pole stator core, an armature winding wound on the stator core and a salient pole rotor core; the stator core of each monomer structure forms a magnetic circuit through stator axial magnetic back iron; the rotor core forms a magnetic circuit through rotor axial magnetic back iron in a motor structurewith an annular excitation winding or annular permanent magnet steel; the stator core, the stator axial magnetic back iron and the permanent magnet steel have arc structures which are equationally divided into 2n (n is a natural number) parts in the motor structure without the rotor axial magnetic back iron; and the rotor of each monomer structure is arranged on a rotating shaft. The motors have the advantages of high space utilization rate of the excitation winding, no additional air gap, high excitation efficiency and high utilization rate of axial sectional areas and can be used as electromotors or generators.

Description

technical field [0001] The invention relates to two kinds of double salient pole motors with axial excitation, and belongs to the field of double salient pole structure motors. Background technique [0002] Professor Lipo of the University of Wisconsin-Madison in the United States added permanent magnet excitation to the switched reluctance motor, and proposed a permanent magnet double salient pole motor. The motor belongs to a variable reluctance motor. Its stator and rotor are salient pole structures. The structure is simple. There is no winding on the rotor and the power density is high. However, because the exciting magnetic field is not easy to adjust, it cannot be used as a generator. [0003] Electric excitation doubly salient motors (such as "doubly salient brushless DC generators", authorized notification number CN1099155C) replace permanent magnets with electric excitation windings, so that the excitation magnetic field of the motor can be adjusted. When working a...

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Problems solved by technology

[0004] In addition to the armature winding, the above-mentioned motor also needs to be equipped with tangential or radial permanent magnets or field windings on the stator, which will inevitably increase the outer diameter of the stator compared with the switched reluctance motor.

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