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Wind Turbine Magnets

To the end of Renewable Wind Energy; GME have developed a line of permanent rare earth neodymium magnets exclusively for direct drive wind turbine generators. We have produced this grade of material for use in DD PMG's (Direct Drive Permanent Magnet Generators) for small and large size wind turbines from 25 kW to 2.3 megawatts. DD PMG’s used in wind turbines offer the advantages of reduced size, weight and manufacturing costs of the generator without any compromising efficiency. Reducing the footprint along with mass of the generator can in turn, reduce the size and weight of other wind turbine components and hence the overall manufacturing cost. Over time, with fewer components, DD PMG wind turbines are also less likely to experience generator malfunction, gearbox failure, costly repair and lost productivity. Our permanent magnets optimize the various magnetic properties to minimize cogging, Ripple Torque, and total breakaway Torque. Total magnet performance loss is less than 0.5% when the magnets are cycled to 90°C. In addition, our NdFeB magnets are designed to run at temperatures as high as 150°C, and in critical situations of an emergency shutdown, or a short circuit at the machine terminals, their enhanced magnetic properties increase flux density survivability. Our NdFeB magnets with high energy products up to 48 MGOe and maximum operating temperatures of 150°C. Rectangular parts may be manufactured up to 250 mm long x 100mm wide x 50 mm thick, with tolerances as tight as ±0.05 mm. Laminated and non-laminated flux concentrators are available as a complete assembly. In addition, various geometries are available including arc and bread loaf shapes.
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