Mechanical dynamics analysis of PM generator using h-adaptive refinement

This paper describes the dynamic analysis of permanent magnet (PM) rotor generator using COMSOL Multiphysics, a Finite Element Analysis (FEA) based package and Simulink, a system simulation program. Model of PM rotor generator is developed for its mechanical dynamics and computational of torque resulting from magnetic force. For the model the mesh is constructed using first order Lagrange quadratic elements and h-adaptive refinement technique based upon bank bisection is used for improving accuracy of the model. Effect of rotor moment of inertia (MI) on the winding resistance and winding inductance has been studied by using Simulink. It is shown that the system MI has a significant effect on optimal winding resistance and inductance to achieve steady state operation in shortest period of time