High Power Density e-Bike Traction Motor using Stator Flux-Barrier Technology

The latest studies on PMSMs with single-layer fractional slot concentrated windings and stator with flux barrier shows that this novel topology outperforms the most commonly used standard motors with concentrated windings in terms of torque density and efficiency. Therefore, in this paper a high power density e-bike motor based on the flux barrier technique is presented and investigated. First, an analytical approach was used to analyze the influence of the stator flux barriers on the winding magneto motive force harmonics. Subsequently, using finite element method the flux-barrier motor was designed and optimized. And finally, various experimental tests were carried out to verify its properties and peak performance limits.