Proposal and Evaluation of PCB Coil-end-type PM Motor with Distributed Winding using Multi-layer Pattern Coil Technique

For electric micromobility applications, an axial-length shortening is required for the coil winding area of the distributed winding stator. In this study, a novel printed circuit board (PCB) coil-end stator, composed of bar-type conductors and a multi-layer printed circuit, has been proposed. The schematic design of the PCB stator and the multi-layer coil pattern has been explained. The structure of the prototype, including the assembly method, has also been presented. The torque characteristics of the prototype when the current vector is controlled have been studied. In addition, its efficiency map has also been reported.