comparison of different permanent magnet arrangements in e-type outer-rotor doubly-salient motors

This research study presents a proposal for three doubly-salient permanent magnet (dspm) motors. these motors primarily consist of a hybrid design that combines biased flux pm (bfpm) and stator slot pm (sspm) motor structures. the primary motor configuration, known as dual-pm, which incorporates both yoke and slot pms, has demonstrated the most favorable combination of high average torque and low torque ripple in the rated current. the study of the operating principle involves the utilization of the magnetic equivalent circuit (mec) to analyze the behavior of both yoke and slot pms, with a specific focus on the flux in the air gap. furthermore, the outcomes of finite element analysis (fea) are evaluated in terms of their performance in both no-load and full-load conditions. a thorough analysis is conducted to identify the benefits of the dual-pm structure.