Radial magnetic pole damping cage structure of generator rotor

Abstract

The invention discloses a radial magnetic pole damping cage structure of a generator rotor, which comprises two damping rings arranged at the two ends of a rotor respectively and a plurality of damping guide bars penetrating through a rotor core and electrically connected with the two damping rings, and the rotor comprises the rotor core, a rotor magnetic pole and a plurality of damping holes formed in the rotor magnetic pole. The damping holes are straight groove damping holes with the central axes parallel to the axis of the rotor iron core, the damping holes in the rotor magnetic poles are asymmetrically arranged at intervals, the distribution circle radiuses of all the damping holes are equal, the damping holes in the adjacent rotor magnetic poles are symmetrically arranged, and the same rotor magnetic pole has at least two sizes of damping hole pitches. According to the radial magnetic pole damping cage structure of the generator rotor, the amplitude of current harmonic waves in the damping winding can be effectively suppressed, the voltage waveform distortion rate is reduced, high-quality electric energy is obtained, and electromagnetic noise generated by the harmonic waves is weakened.

Description

technical field [0001] The invention belongs to the field of generators, and more specifically relates to a generator rotor radial magnetic pole damping cage structure. Background technique [0002] In the prior art, in the harmonic suppression means of synchronous generators, the main methods are: 1. Reasonably increase the impedance of the stator and rotor windings. 2. Install a damping winding on the rotor. 3. In terms of winding structure and parameter improvement, short-distance windings and hybrid windings can reduce harmonic interference. 4. The non-sinusoidal distribution of the air gap magnetic field can be reduced by improving the design of the magnetic poles of the stator and rotor magnetic slot wedges, chute and slot modification. Among the above-mentioned four harmonic suppression methods, the stator-rotor inclined slot method is the most commonly used in the prior art. That is to say, the stator and rotor slots of the generator are set as inclined slots, tha...

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Problems solved by technology

That is to say, the stator and rotor slots of the generator are set as inclined slots, that is, the slots on each stator and rotor punch are superimposed to form an inclined winding slot, and there is a gap between the winding slot and the winding. This weakens the high-order The stator and rotor structure of electromagnetic harmonics has high requirements for the production process and installation work of stator and rotor punching, the processing technology is complicated, the yield rate is low, and the production cost is high

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