Double Induction Brushless Excitation Motor

Abstract

The invention provides a dual-induction brushless excitation motor, which comprises a stationary part and a rotating part. The stationary part comprises a stator iron core, a single-phase power winding, a stator excitation winding, an end cover and a casing. The stator iron core is arranged inside the casing, four single-phase power windings are arranged on the upper part of the stator iron core,and the upper part of each single-phase power winding is provided with a stator excitation winding. The rotating part comprises a rotor core, a rotating shaft, an additional excitation winding of therotor, an excitation winding of the rotor and a rectifier bridge; The rotating shaft is arranged at the center of the rotor iron core, the edge of the rotor iron core is provided with four groups of rotor additional excitation windings and rotor excitation windings, and the rectifier bridge is arranged inside the rotor iron core. The invention has the advantages that the slip ring and the electricbrush necessary for the excitation of the brush motor are omitted, and the brushless excitation of the rotor excitation electric excitation motor can be realized without adding an additional exciter.

Description

technical field [0001] The invention relates to a double-induction brushless excitation motor, which belongs to the technical field of brushless excitation synchronous motors. Background technique [0002] For the rotor excitation motor, it is necessary to use brushes and slip rings to introduce the excitation current. The armature and slip rings need frequent maintenance and replacement due to long-term friction during operation; at the same time, brushes and slip rings are prone to sparks, making brushed excitation motors unsuitable for use in flammable and explosive petrochemical and environmental conditions. Harsh aerospace applications. Therefore, in the existing technology, it is necessary to study the brushless scheme of the rotor excitation motor, and generally adopt the following methods: (1) Place the excitation winding on the stator to generate an axial magnetic field: the rotor is made of a whole piece of ferromagnetic material, and the guide The magnetic bridg...

AI Technical Summary

Problems solved by technology

The armature and slip rings need frequent maintenance and replacement due to long-term friction during operation; at the same time, brushes and slip rings are prone to sparks, making brushed excitation motors unsuitable for use in flammable and explosive petrochemical and environmental conditions. harsh aerospace conditions

Therefore, in the existing technology, it is necessary to study the brushless scheme of the rotor excitation motor, and generally adopt the following methods: (1) Place the excitation winding on the stator to generate an axial magnetic field: the rotor is made of a whole piece of ferromagnetic material, and the guide The magnetic bridge forms a rotating NS pole on the rotor; however, the eddy current loss of this excitation method is obvious, and the magnetic flux leakage is more serious: (2) Place the excitation winding on the stator, such as switched reluctance motor, double salient pole motor and switched magnetic (3) Use a rotating armature exciter for power supply; however, this type of motor has a long axial length, complex structure, and very high production and maintenance costs

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