Design of an MgB₂race track coil for a wind generator pole demonstration

An MgB2 race track coil intended for demonstrating a down scaled pole of a 10 MW direct drive wind turbine generator has been designed. The coil consists of 10 double pancake coils stacked into a race track coil with a cross section of 84 mm x 80 mm. The length of the straight section is 0.5 m and the diameter of the end sections is 0.3 m. Expanded to a straight section of 3.1 m it will produce about 1.5 T magnetic flux density in the air gap of the 10 MW 32 pole generator and about 3.0 T at the edge of the superconducting coil with an operation current density of the coil of 70 A/mm2.Electrical Sustainable EnergyElectrical Engineering, Mathematics and Computer Scienc

Design Study of Coated Conductor Direct Drive Wind Turbine Generator for Small Scale Demonstration

AbstractWe have investigated the properties of a superconducting direct drive generator suitable for demonstration in a small scale 11kW wind turbine. The engineering current density of the superconducting field windings is based on properties of coated conductors wound into coils holding of the order 68 meters of tape. The active mass of the generators has been investigated as function of the number of poles and a 4 pole generator is suggested as a feasible starting point of an in-field demonstration of the system reliability. An active mass of m = 421kg and a usage of 3.45km of tape will be needed to realize such a generator with a peak flux density in the airgap of B0 = 1.5 T