Calculation of Slot Leakage Flux and Current Displacement in Form-Wound Windings of Electric Machines by Magnetic Equivalent Circuit

This publication deals with the calculation of slot leakage flux and current displacement in form-wound windings of electrical machines. The proposed method is based on a magnetic equivalent circuit to calculate the time-varying magnetic quantities. Slot’s leakage flux is decomposed into its longitudinal and transverse component. Afterwards current displacement is calculated by an analytical approach. The influence of saturation on slot’s leakage flux and current displacement within the coil sides is taken into account.Even though the focus is on form-wound windings with rectangular cross-sectional area, the method is generally applicable to arbitrary configurations. The obtained results are compared to Finite-Element-Analysis.