Report

Brushless Wind Power Generator for Limited Speed Range

Updated 2021-10-11 Published 2019-02-19

The aim has been to develop a prototype of a new type of wind turbine generator, the Brushless Doubly-Fed Induction Generator, or BDFIG. The DFIG is one of the most popular generator types used in wind turbines today, however, it does have certain disadvantages. The conventional DFIG uses slip rings and carbon brushes for speed control. These components demands a lot of maintenance, which is costly, especially for offshore wind power plants.

The BDFIG lacks brushes and slip rings, and uses instead power electronic
converters mounted on the rotor and an exciter mechanically connected to the
shaft. Also within the project, a wireless controlled Rotating Power Electronic
Converter, RPEC, has been constructed. The RPEC and the BDFIG have
been built and tested in full scale in a laboratory environment, and have been
evaluated both technically and economically.

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