Analytical modeling of low cost single phase wound field flux switching machine

Abstract

For applications demanding low cost and high efficiency, Wound Field Switched Flux (WFSF) machines are good candidate. However, the complex structure, nonlinear behavior and magnetic saturation increase the challenge in adaptation of analytical method to model the magnetic flux distribution. Finite Element Method is not feasible for initial design level of machine owing to computational complexity. Fourier Analysis has less accurate results. To date, Magnetic Equivalent Circuit (MEC) modeling is best for initial design level. Magnetic Equivalent Circuit (MEC) modeling inherits the feature of less computational complexity and better accuracy. Therefore, this paper presents the Magnetic Equivalent Circuit (MEC) modeling of proposed 8slots-6poles Wound Field Switched Flux (WFSF) machines with trapezoidal slot structure. Magnetic Equivalent Circuit (MEC) modules of different parts of WFSF machine are examined. Global Reluctance Network (GRN) obtained and solved to get incidence matrix in MATLAB. No-load flux linkage of GRN methodology is compared with Finite Element Analysis (FEA) results. The error computed is less than ∼2% which demonstrate the GRN methodology validation.