Electric exciting brushless synchronous machine

Abstract

This invention relates to an electric excitation brushless synchronous motor including: a shell, an armature core, an armature winding, an axis, magnetic poles of N and S characterizing that the magnetic pole under the armature core is like a tile, all N poles expand to one side and pull up, then expand to a same side to be connected to the loop of a same material and form an integer, in which, a ring magnetic bridge is fixed on the shell between the two circles, a DC excitation winding is set in the circle bridge and the outer circle of the pole is set with a cage total damp winding.

Description

1. Technical field [0001] The electric excitation brushless synchronous motor of the present invention belongs to the synchronous generator / synchronous motor of motor type. 2. Technical background [0002] The excitation source of the magnetic poles of the electric excitation synchronous motor is direct current, which is introduced to the rotating rotor by two brushes and slip rings. Due to the use of brushes and slip rings, the motor has the advantages of simple structure and small size, but the cost of slip rings and brushes is high, the maintenance workload is large, and the failure rate is relatively high. This restricts the use of electric excitation synchronous motors in aerospace, flammable, explosive and dusty occasions. [0003] In 1950, foreign countries began to develop rotary rectifier-type brushless AC generators. The armature windings of the AC exciter of this motor are on the rotor, and the DC power obtained by rectifying the AC current of the armature windin...

AI Technical Summary

Problems solved by technology

The failure rate of the rotary rectifier of this generator is reduced, but the rotor structure is also complicated, maintenance is difficult, and the motor cannot be reversely excited, which is also unfavorable for the failure of the main generator

[0005] To sum up, the electric excitation synchronous motor uses direct current to directly excite the magnetic poles, which has the advantages of simple structure and small size, but the brush-slip ring structure also brings the disadvantages of large maintenance and restrictions on the use of the motor; the resolver type without Although brush-excited synchronous motors and rotary rectifier brushless alternators eliminate brushes and expand the use of occasions, their rotors are complex, and the rotary rectifier has high failure rates and difficult maintenance

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