Permanent Magnet Synchronous Generator's Integrated Optimal Design in a Large-Scale Wind Turbine

In recent years, permanent magnet synchronous generators (PMSGs) are being widely used in wind energy conversion chain due to its exceptional efficiency and it presents the most beneficial devices in the field of wind energy because of a number of benefits, including the removal of noise and maintenance expenses because of the gearbox’s suppression and the absence of rotor circuit excitation barriers because of the permanent magnets (PMs). Their major downside is that it is a huge volume for high torque. Therefore, the enhancement of the generator design is regarded as the primary element of the chain under consideration in order to guarantee the lowest volume of active materials while preserving high torque. The approach of the design integrated by optimization of the system under consideration is intended to be explained by the methodology examined. Its foundation is the development of analytical models to identify a feasible system structure. Using the MATLAB ® -FEMM software, the finite element analysis (FEA) is presented to extract the back electromotive force (EMF), the flux, and the electromagnetic torque curves. To create an ideal structure with a maximum torque, a minimum volume, and improved efficiency, the volume density of the torque is then optimized. The genetic algorithm (GA) method is used to evaluate the optimization. Consequently, the market for wind turbines is presented with an optimal answer, providing a higher volumetric torque density with an efficiency higher than 80%. The optimized structure was validated with the FEA and traced by the MATLAB-FEMM. The flux density, the back EMF, and the electromagnetic torque curves are plotted before and after optimization to validate our optimization procedure and design.