Design and Analysis of PM BLDC Generator for Wind Power Generation

Abstract

Numerous applications, significantly different than the conventional requirements, lead to conceptualizing of newer type of electrical rotating machines. To realize these newer machines with different behaviours , demands continuous exploration of material science and think beyond routine theoretical concepts. One of the such realization is of Permanent Magnet machines. This technological advancement in development of new materials have placed permanent magnet machines in a prominent position. However, a biggest emphasis in the project has been put on the design of Permanent Magnet Brushless DC generator (PMBLDC) suitable for a small scale Wind Energy Conversion System (WECS), the different topologies of electrical generators have also been investigated for small scale wind turbines. A Permanent magnet generator is proposed as a solution with respect to the cost of other systems. After a detailed literature study on PM BLDC topologies,axial flux machines have found to be suitable for the desired application, because of its lighter weight, high power to weight ratio, high torque to weight ratio, their low speed suitability. This has led to focus the project work on the use of axial flux PMBLDC generators and has carried out the designing, modelling and analysis of an AFPM BLDC and the design is assessed by means of Finite Element Method (FEM) which includes its electrical and magnetostatic behaviour. To accomplish this purpose model was prepared in the CAD packaged software CREO, and then FE analysis has been carried out. A 250 W AFPM BLDC dual rotor and single rotor generator is designed and analyzed .Also,the design parameters have been calculated for 5 kW model and due to paucity of time the analysis could not be performed. To validate the designed model, a simulation is performed in MATLAB Simulink and the performance outputs have been presented.