Technologies. Large Wind Turbine Solutions. Gearless Variable-Speed Power Generation

Gearless, Variable-Speed, AC Power Generation Solutions for a Superior ROI.

The same technology used in the VWS-X Series of small wind turbine solutions is no less relevant for larger wind turbines in the 100's of kW.

Indeed, as larger turbines become more mechanically complex, the advantages of the VWS-X Series technology - enabled by high-capacity VRS technology - become even more pronounced.

Designed specifically for improved output in low and variable-speed winds, the VWS-X Series based on AC synchronous (squirrel cage) generators is the ideal solution for turbines intended for locations with low and variable-speed winds.

The VRS integrated into the VWS-X Series manipulates the intensity of the generator's magnetic field in response to changes in wind speed using a proprietary methodology and algorithm. Accordingly, the generator's magnetic field is able to "absorb" fluctuations in RPMs (or wind speed) of over 60% above or below the generator's nominal RPM rating.

Working together, the VRS, generator, and power conditioning/grid-synchronization electronics are able to operate at high efficiency in all wind regimes, with noticeable improvements in output in low and variable-speed winds. For more information on the VRS, see the VRS Spec Sheet.

The VWS-X Series is based on AC synchronous (squirrel cage) generators that deliver higher power output per pound/kilogram compared to PMGs. While the VWS-X Series is slightly longer than an equivalent-output PMG, it has a small diameter and weighs less. As a result, the tower loading, and nacelle and mast weights, are reduced.

As the wind speed changes, the generator's magnetic field absorbs the fluctuations in generator shaft RPMs across a wide range of RPMs. There is therefore no need for multi-ratio gearboxes, blade pitch-control mechanisms, and/or other electro-mechanical methods typically used to stabilize generator shaft RPMs to achieve the highest possible efficiency. Eliminating these complex systems increases overall system reliability and therefore reduces maintenance.

The VWS-X Series can be integrated into new OEM turbines, as well as older turbines being upgraded, retrofitted, or refurbished. To discuss your specific needs or for more information about the VWS-X Series technology for medium and large wind turbines, please contact us.