An investigation of winding temperature on a wind generator by using empirical model

Abstract

Permanent magnet generators are the majority source of commercial electrical energy. With the recent reduction in the price of high performance magnet, it is made possible to construct a high efficiency compact generator. The problem with the compact generator is the temperature management. Too high magnet temperature could lead to irreversible demagnetization of the permanent magnet material. This paper proposes a method to formulate an empirical model based on the simulation data. Ansys Fluent software is used to simulate the heating and the cooling effects inside the generator. Design of Experiment is used to plan the experimental run so that the results are sufficient enough to formulate a linear or a nonlinear model. The formulated empirical model shows a good prediction of the winding coil temperature with the percentage of difference of less than 5 % for the natural convection cooling.