Cantilever-type large-capacity brushless excitation system
An excitation system, cantilever technology, applied in the direction of cooling/ventilation devices, electrical components, electromechanical devices, etc., can solve the problems that the capacity and structure of the rectification device cannot meet the requirements, the capacity of the brushless excitation system is low, and the cooling effect is not ideal. Achieve improved cooling effect, light weight and compact structure
Active Publication Date: 2009-10-07
NANJING TURBINE & ELECTRIC MASCH (GRP) CO LTD
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Problems solved by technology
[0003] The problem to be solved by the present invention is: the capacity of the existing brushless excitation system is relatively low, there are many installation links when the capacity is increased, the cooling effect is not ideal, the capacity and structure of the rectification device cannot meet the requirements, etc., the operation is unstable, and the failure High efficiency, it is necessary to provide a large-capacity brushless excitation system with compact and reasonable structure, reliable operation, good rectification effect, and convenient installation and maintenance.
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[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] Such as figure 1 , the brushless excitation system of the present invention is arranged at the end of the rotor shaft 11 of the main generator, the shaft 1 of the main exciter 4 is a cantilever type, and one end is provided with a back wheel 1-1, through the bearing 10 of the main generator and the rotor of the main generator The rotating shaft 11 is rigidly connected, the rotating shaft 1 is rigidly connected with the rotating shaft 11 of the main generator rotor through the back wheel 1-1 and the main generator bearing 10, the other end of the rotating shaft 1 is suspended, the magnetic steel 2-2 of the permanent magnet auxiliary exciter The rotor 4-2 of the exciter, the rectifying device 5 and the ground detection slip ring device 6 are sequentially installed on the rotating shaft 1 of the main exciter from the steam end of ...
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A cantilever-type large-capacity brushless excitation system comprises a permanent magnetic pilot exciter, a main exciter, a rectifying device and an earthing detection slip-ring device; the rotating shaft of the main exciter is of a cantilever type; the magnet steel of the permanent magnetic pilot exciter, the rotor of the main exciter, the rectifying device and the earthing detection slip-ring device are installed on the rotating shaft of the main exciter and synchronously rotate with the rotating shaft. The invention achieves a cantilever-type structure, and the structure of the frame avoids the influence of the loading and unloading quality of the excitation system on the reliability of the system; the invention is provided with an air cooler, has high air cooling efficiency and low cost and is suitable for the large-capacity brushless excitation system; the capacity of the rectifying device meets the demand and the cooling effect is good, thereby being capable of providing ideal large excitation current for a main generator; and the invention reduces the influence of external factors on the exciter in the aspects of installation link, system structure and the like, leads the system to be safer and more reliable, and the whole brushless excitation system has compact and reasonable structure, light weight, reliable operation, good rectifying effect and convenient installation and maintenance.
Description
technical field [0001] The invention relates to a generator brushless excitation system, which is a cantilever type large-capacity brushless excitation system. Background technique [0002] The excitation system is an important part of the synchronous generator set, which directly affects the operating characteristics of the generator. The excitation system is generally divided into DC exciter excitation system, brushless excitation system and static excitation system. DC exciter excitation system and static excitation system both need carbon brushes and slip rings, and the magnitude of the excitation current is limited by the slip rings and carbon brushes; sparks caused by friction between carbon brushes and slip rings cannot be used for flammable and explosive The special environment of gas; there will be carbon brush dust during operation, the problem of carbon brush wear is serious, and the workload of unit operation and maintenance is heavy. The brushless excitation s...
Claims
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Login to View More IPC IPC(8): H02K19/38H02K19/16H02K13/00H02K9/02
Inventor 田宏张利光葛淑明
Owner NANJING TURBINE & ELECTRIC MASCH (GRP) CO LTD