A New Method to Measure the Switched Reluctance Motor's Flux

This paper presents a method to measure the flux linkage curves of a switched reluctance motor (SRM) that avoids the inherent errors introduced by iron and copper losses using the classic method of applying a voltage to the phase of the SRM and integrating it, minus a resistive voltage drop to get the flux. In the proposed method, the flux is computed from the measured static torque using conservation of energy and from the SRM's measured unaligned inductance. In this paper, the method is applied to measured torque data from an experimental SRM and to torque calculated by finite-element analysis (FEA). The experimental results and FEA results are compared with the results obtained using the classic method and an analytical model.