Fukushima Forward: The technology

The Fukushima Forward turbine in action

The Fukushima Forward turbine in action

The installation of two 7MW Mitsubishi SeaAngels at Fukushima will mark not only the christening of the world’s largest offshore turbines, but also the construction of the world’s first floating wind array.

With a hub height of 110-120 metres and a rotor diameter of 167 metres, the SeaAngel is among the biggest beasts heading offshore, alongside Samsung’s 7MW S-171-7.0 (now in commissioning in the shallows off Scotland) and Vestas’ 8MW V164 (just erected for testing onshore in Denmark).

But under the bonnet, the SeaAngel is a breed apart. Where other manufacturers have opted for either direct-drive or medium-stage geared transmission systems powering permanent-magnet generators, the SeaAngel is being built around cutting-edge hydraulics technology — known at Mitsubishi as digital displacement transmission (DDT) — to Log in to read complete article.

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