Why PMDD?

 

The gearless advantage. By eliminating a failure-prone gearbox, permanent magnet direct-drive (PMDD) technology requires fewer components with only one moving part in the drivetrain, further reducing the lifetime maintenance costs of the turbine. The end result is less downtime, meaning an overall increase in turbine availability and increased energy production.


Cost savings over the life of wind power asset. Our turbines offer lower lifetime maintenance costs and shorter planned service cycles than traditional doubly-fed induction generator (DFIG) configurations.  As a result of our passive and modular components, the absence of a gearbox, and an innovative pitch control system, our turbines offer improved reliability relative to our competition. Elimination of down-time and replacements associated with gearboxes provides significant cost-of-ownership reductions throughout the life span of a direct-drive turbine.
 


A permanent magnet generator further boosts Goldwind’s advantage. Eliminating the need for rotor winds, slip windings, slip rings, brushes, and associated maintenance makes the turbine more reliable than a direct drive machine running on wound rotor excitation technology.


High power generating efficiency. Permanent magnet direct-drive (PMDD) turbine generators avoid rotor winding losses and mechanical energy losses associated with gearboxes and couplings. The full power converter provides the flexibility to optimize rotor rotational speed for maximum mechanical energy transformation.


Compliance with demanding grid requirements. Full power conversion means superior electrical grid characteristics.

 

2.5MW Turbine 3D