Finite element based analytical model for controller development of switched reluctance machines

This paper presents a novel method of modeling SRM including mutual coupling effect based on Finite Element Analysis (FEA). Once the machine geometry and design is completed in FEA, it is required to analyze the performance of the machine at different operating conditions with different control methods. Designing control algorithm with FEA in the loop is not convenient because of the complexity and simulation time involved. An analytical model performing similar to the FEA model and including the mutual coupling effect is desired variable speeds of operation. The self and mutual λ-i-θ during tuning of the control algorithm at different modes and characteristics of the machine can be derived from the FEA on the λ-i-θ characteristics of the machine is developed which can model and stored in a look-up table. A state space model based be readily coupled to any controller model. The method incorporates the mutual coupling effect which cannot be neglected for accurate modeling and good controller performance.