Efficient Wind Power from the Evance R9000 Small Wind Turbine

The Evance R9000 is probably the most sought after small wind turbine available.

Being the "next generation" of small wind turbines, it fully integrates the very best of existing technologies with major new patented innovations. The result is an attractive turbine with uncompromising performance and excellent reliability - existing installations average over 99% up time.

What is so unique about the R9000 Wind Power Generator?

The R9000 is the first turbine to be equipped with Reactive Pitch^TM technology, a unique control concept developed and patented by Evance. Reactive Pitch, a significant advancement of passive pitch technology, guarantees that the blades will capture exactly the right amount of energy according to the wind speed and generator loading conditions.

Capturing wind power at low wind speeds

At low to moderate wind speeds the R9000 operates continuous optimium blade positioning via the patented Reactive Pitch mechanisim. This enables the maximum possible wind energy to be captured by holding the blades in the most efficient position with precise positioning. The blades are high efficiency aerofoil sections specially optimised to work in tandem with Reative Pitch.

The R9000 Wind Power Generator has greater durability and safety

At higher wind speeds, when the energy in the wind exceeds the maximum capacity of the generator, the R9000’s unique Reactive Pitch mechanism automotically pitches the blades. This regulates energy capture, rotor speed, and the loads experienced by the turbine structure. It will therefore capture the full 5kW power, and the reduction in stresses mean that the R9000 offers greater safety and survivability.  A particular unique feature of Reactive Pitch is that rotor speed (and thus structural loads) are automatically regulated, whatever the wind or generator conditions, including grid failure.

The R9000 also has a patented high-efficiency generator which converts up to 96% of the energy captured from the wind into useful electricity. The generator is specifically designed for the R9000, and is integrated into the turbine's rotor. This eliminates the need for a spinning shaft or 'brush' type contacts. Fewer moving parts means greater reliability.

Patented ElectroBrake stops the wind power generator safely

There's no mechanical brake, eliminating the usual issues with such devices. Instead, there's the patented ElectroBrake^TM, an integrated electro-dynamic brake which uses the generator to safely stop the machine whatever the wind speed. It can be operated manually, or activates automatically as a redundant safety feature in the unlikely event of rotor overspeed.

The combination of Reactive Pitch and the ElectroBrake means there is no need for noisy gearboxes, complex speed regulation systems including 'dump loads' or mechanical brakes.

Every aspect of the R9000 has been carefully thought out and integrated to assure maximum safety, efficiency and reliability.

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