United States

United States

Boulder reveals in-generator converter

UNITED STATES: Boulder Wind Power has developed a new power converter that allows conversion to direct current (DC) within the generator.

Boulder's generator has a vastly increased diameter and sits ouside the nacelle
Boulder's generator has a vastly increased diameter and sits ouside the nacelle

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The developer of the novel generator said the new technology allows the power conversion process to be distributed across the generator. This could lead to an improvement in efficiency, possibly of up to 2%, the company said.

Boulder's generator uses printed circuit board technology (PCB) to produce the stator's circuitry, eliminating the need for the use of iron. The direct-drive generator sits outside the nacelle and has a greatly enlarged diameter.

"Because Boulder generators are naturally segmented, we can combine our PCB stators with power conversion components in a modular fashion and can optimise system voltage to meet customer requirements," said CEO Andy Cukurs.

The increase in efficiency is down to the use of next-generation silicon-carbide transistors and the use of direct current in down-turbine cables.

While the company has been lauded for its innovate approaches to new technology, it is yet to produce an end product. Boulder said in 2012 that it would have a prototype of its generator up and running in a turbine by the end of last year, but this is yet to materialise.

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