Auxiliary exciter rotor structure with rotating rectifier function

Abstract

The invention discloses an auxiliary exciter rotor structure with a rotating rectifier function, and solves the problem of how to integrate a rotating rectifier and an auxiliary excitation rotor. The auxiliary exciter rotor structure comprises an auxiliary exciter rotor iron core (1) and a shaft end section (3) of a non-driving end of a rotating shaft of the synchronous generator, the shaft end section (3) of the non-driving end is a hollow shaft, a disc-shaped groove (5) is formed in the vertical face of the outer side of the auxiliary exciter rotor iron core (1), and a positive pole rotary rectifier module mounting base (6) and a negative pole rotary rectifier module mounting base (7) are arranged in the disc-shaped groove (5) respectively. A positive pole rotary rectifier module (8) is arranged on the positive pole rotary rectifier module mounting base (6), a negative pole rotary rectifier module (9) is arranged on the negative pole rotary rectifier module mounting base (7), and a pressure-sensitive protection resistor (10) is connected between the positive pole rotary rectifier module (8) and the negative pole rotary rectifier module (9). Axial space is saved, the structure is simple and compact, and assembling is convenient.

Description

technical field [0001] The invention relates to an auxiliary exciter in a synchronous generator set, in particular to an auxiliary exciter rotor structure with the function of a rotary rectifier. Background technique [0002] The existing synchronous generator structure is generally arranged with a three-phase power generation winding on the stator, an excitation winding is arranged on the rotor, an exciter stator is arranged on the inner elevation of the end cover of the non-driving end of the synchronous generator, and an exciter stator is arranged on the non-driving end The auxiliary exciter stator is arranged on the outer bearing cover, and the rotary rectifier, the exciter rotor and the auxiliary exciter rotor are arranged in turn on the shaft of the non-drive end of the synchronous generator rotor. Therefore, the hollow shaft of the synchronous generator must have a certain length Requirements, the layout of the above components can be completed; permanent magnet steel...

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Problems solved by technology

[0002] The existing synchronous generator structure is generally arranged with a three-phase power generation winding on the stator, an excitation winding is arranged on the rotor, an exciter stator is arranged on the inner elevation of the end cover of the non-driving end of the synchronous generator, and an exciter stator is arranged on the non-driving end The auxiliary exciter stator is arranged on the outer bearing cover, and the rotary rectifier, the exciter rotor and the auxiliary exciter rotor are arranged in turn on the shaft of the non-drive end of the synchronous generator rotor. Therefore, the hollow shaft of the synchronous generator must have a certain length Requirements, the layout of the above components can be completed; permanent magnet steel is arranged on the rotor of the auxiliary exciter. When the rotor of the synchronous generator is driven to rotate by the drive end equipment, the three-phase coil of the stator of the auxiliary exciter is cut by the rotor magnetic field, and a three-phase The alternating current is rectified into direct current by the automatic voltage regulator (AVR) and supplied to the stator pole coil of the exciter to generate the magnetic field of the exciter. It is rectified into direct current by the rotary rectifier, and then supplied to the excitation coil on the rotor of the synchronous generator to complete the excitation of the synchronous generator; in this traditional structure, the rotary rectifier is installed between the rotor of the synchronous generator and the rotor of the exciter, generally To occupy an axial distance of about 300 mm, when installing a synchronous generator on a ship and other occasions with limited space on site, the problem of insufficient axial installation space for the synchronous generator is often encountered. How to shorten the axial distance of the synchronous generator The distance has become a problem that needs to be solved urgently

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