Boulder made its name with a design for a radically different direct-drive generator that relies on a printed circuit board stator and sits outside the turbine's nacelle. However, it has now released an array of new products, including a geared generator.
The medium-speed geared turbine that can fit within existing nacelles. But the new generator is not totally abandoning Boulder's innovative direction. It also features a printed circuit board stator which means it has no iron and as such no attractive forces between stator and rotor, meaning it can be made much lighter than other generators.
As well as moving into medium-speed generators, the company has also taken a step in the other direction, with the design of an ultra-low speed generator. This would be suited to sites that have very-low-wind regimes.