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Brushless ac excitation speed-changing same-frequency generator

An AC excitation and generator technology, applied in synchronous generators, control generators, synchronous machines, etc., can solve the problems of increased maintenance and operating costs of generators, complex inverter structures, shortened service life, etc. Network automatic control device, eliminating the frequency conversion device and speed-up device, the effect of reducing operation and maintenance costs

Inactive Publication Date: 2008-08-20
王光顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to meet the requirements of grid-connected power generation, high-power low-speed multi-pole generators such as wind turbines and hydroelectric generators need to keep the output voltage frequency consistent with the grid frequency at different speeds. Most direct drive generators now use frequency conversion Electronically adjust the output frequency, due to the complex structure, high failure rate and high cost of the inverter, it has become a major obstacle for wind power and hydropower generators to be connected to the grid.
In addition, ordinary AC excitation generators have brushes and friction parts, which greatly increase the maintenance and operation costs of the generator and shorten the service life

Method used

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  • Brushless ac excitation speed-changing same-frequency generator
  • Brushless ac excitation speed-changing same-frequency generator
  • Brushless ac excitation speed-changing same-frequency generator

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Embodiment Construction

[0025] Each drawing of this embodiment adopts a form of expression similar to a sectional view, but in order to clearly show the structure and connection relationship of each part, no sectional line is drawn.

[0026] Such as Figure 1-Figure 3 As shown, the brushless AC excitation variable-speed co-frequency generator of the present invention includes a main shaft 1, a generator rotor 2 fixedly installed on the main shaft 1, and a generator stator 3 arranged around the generator rotor 2, and the generator The generator excitation coil 21 is installed on the turn 2, the generator armature coil 31 is installed on the generator stator 3, the generator stator 3 is installed on the main shaft 1 through the bearing, and the generator rotor 2 is fixedly installed on the main shaft 1.

[0027] The number of stator poles of this generator is not equal to the number of rotor poles. The specific method is: divide the circumference of the generator stator 3 into two or more stator secto...

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Abstract

The present invention relates to a generator, especially to a brushless alternating-current excitation variable-velocity same-frequency generator. The generator comprises a principal axis, a generator rotor fixed-installed on the principal axis, a generator stator which is surrounding-arranged at the circumference of the generator rotor, and an excitation mechanism arranged on the principal axis. The excitation mechanism comprises a two-stage exciter which is axially installed with the generator rotor, a synchronous excitation electric motor and two one-stage exciters. The generator eliminates the easy-damaged friction part such as electric brush and the like, and the operating and maintenance charge are reduced for a large scale; when the rotary speed varies the generator can keep the frequency of the output voltage same to the frequency of the electric network and reduces the network-connection automatic control device. The adopting of the multiphase commutation can provide high-quality exciting current to the excitation winding, and further the quality of the output electric energy of the secondary exciter and the stability of the electric motor are increased.

Description

technical field [0001] The invention relates to a generator, in particular to a brushless AC excitation variable-speed co-frequency generator. Background technique [0002] In order to meet the requirements of grid-connected power generation, high-power low-speed multi-pole generators such as wind turbines and hydroelectric generators need to keep the output voltage frequency consistent with the grid frequency at different speeds. Most direct drive generators now use frequency conversion Electronically adjust the output frequency, due to the complex structure of the inverter, high failure rate, and high cost, it has become a major obstacle for wind and hydroelectric generators to be connected to the grid for power generation. In addition, ordinary AC excitation generators have brushes and the existence of friction parts greatly increases the maintenance and operation costs of the generator and shortens its service life. Contents of the invention [0003] The purpose of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/44H02K19/38H02P9/42H02K17/42H02K3/12H02K19/16H02K21/38H02K21/44
Inventor 王雪霖王光顺
Owner 王光顺
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