A magnetic pole core with damping strips for a high-speed rotating salient pole generator

Abstract

The invention provides a magnetic pole core with a damping bar for a high-speed rotating salient pole generator, which mainly includes a magnetic pole pressing plate, a magnetic pole punching set, a punched short circuit ring installed between the magnetic pole pressing plate and the magnetic pole punching set, a damping plate and Magnetic pole tie rod and damping strip, the magnetic pole pressing plate is fixedly connected with the magnetic pole pulling rod, the magnetic pole punching set is compressed between the magnetic pole pressing plate and the magnetic pole tie rod, and the damping strip is installed in the damping strip mounting hole on the magnetic pole punching set Inside, the damping plate is electrically connected to the punched short-circuit ring, and the punched short-circuit ring is short-circuited to the damping bar. The invention is suitable for high-speed rotating salient pole generators when the three-phase load is asymmetrical or the load changes suddenly, and can well avoid the problem of asymmetric operation of the three-phase load of the generator caused by the sudden load change, and improve the asymmetry of the generator The excessively high operating voltage weakens the negative-sequence magnetic field and reduces the sinusoidal distortion rate of the waveform, improving the safety and reliability of the generator.

Description

Technical field [0001] The invention relates to the technical field of salient pole generators, in particular to a magnetic pole core with damping strips for high-speed rotating salient pole generators. Background technique [0002] The current low-to-medium-speed salient pole generators with a rotation speed of 1000-1100r / min usually operate symmetrically, with relatively uniform load, and will not generate excessive voltage or excessive current during operation to cause damage to the generator. The magnetic pole core with damping strips commonly used in low- and medium-speed salient pole generators has a structure that after the damping strip passes through the magnetic pole punching piece and end plate, the copper damping ring is used at its end to short-circuit it, and it is fastened with bolts. The end face of the pole core end plate. Due to the limitation of structure and material strength, this kind of magnetic pole core with damping strip can be used in medium and low sp...

AI Technical Summary

Problems solved by technology

[0003] However, for high-speed rotating salient pole synchronous generators with a speed of 1800-2200r / min, especially auxiliary generators with integrated main and auxiliary generators, the alternating current generated by them must be provided to auxiliary systems on the locomotive, such as fans, air conditioners, lighting, etc. , and these loads of the auxiliary system are uneven and symmetrical

Therefore, when the generator is running, due to the complex and uneven symmetry of the loads of each phase, or when the load is suddenly put into use, or the load is suddenly stopped, the generator may generate excessive voltage or current. It will affect the normal operation, or even damage the generator, greatly reducing the safety and reliability of the generator.

In addition, because the salient pole generator will generate high centrifugal force when it rotates at high speed, the centrifugal force at the same mass and rotation position can be increased to more than three times, which undoubtedly puts forward higher requirements for the mechanical strength of the magnetic pole core. The existing pole cores with damping strips obviously cannot meet the above requirements for the pole cores for the safe and reliable operation of high-speed rotating salient pole generators.

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