Direct grid-tied variable-speed constant-frequency generator

Abstract

The invention relates to a generator, and particularly relates to a direct grid-tied variable-speed constant-frequency generator. The generator comprises a main shaft, a generator rotor fixedly arranged on the main shaft and a generator stator which is arranged on the periphery of the generator rotor in a surrounding manner, wherein the generator rotor is provided with a generator direct current excitation coil, and the generator stator is provided with a generator armature coil; the generator stator is arranged on the main shaft through a bearing, and the generator rotor is fixedly arranged on the main shaft; an exciter is arranged on the main shaft and comprises an exciter armature shell arranged on the main shaft and an exciter rotor fixedly arranged on the main shaft; the exciter rotor is fixedly provided with an exciter rotor direct current excitation coil; the inner side wall of the exciter armature shell is fixedly provided with an exciter armature, and the outer side wall of the exciter armature is fixedly provided with a main generator rotor winding coil; a main generator armature shell is sleeved on the outer side of the exciter armature shell and is fixedly connected with the generator stator; and the inner side wall of the main generator armature shell is fixedly provided with a main generator stator coil. When the rotating speed of the generator changes, the output voltage frequency of the generator and network frequency are kept same all the time; and the generator disclosed by the invention is compact in structure and simple in production process.

Description

Technical field [0001] The invention relates to a generator, in particular to a direct grid-connected variable speed constant frequency generator. Background technique [0002] In order to meet the requirements of grid-connected power generation by wind turbines and other variable-speed generators, the output voltage frequency needs to be consistent with the grid frequency at different speeds. Now direct-drive generators, doubly-fed generators, etc. mainly use rectification— The inverter method electronically adjusts the output frequency. Due to the complex structure, high failure rate and high cost of the inverter, it has become a major obstacle to the grid-connected power generation of variable-speed generators such as wind power. My other patent application "Direct grid-connected variable speed constant frequency generator", application number 2011204233619, discloses a feedback frequency modulated generator including a main generator, an exciter, and a main generator. The mai...

AI Technical Summary

Problems solved by technology

However, this direct grid-connected variable speed constant frequency generator uses a large number of hollow shafts and brushes, the production and assembly process is complicated, the cost is high, and the failure rate is high

Images