Novel design of a coreless axial‐flux permanent‐magnet generator with three‐layer winding coil for small wind turbines - Yao - 2020 - IET Renewable Power Generation - Wiley Online Library
Figure 7 from Permanent magnet generator for counter-rotating vertical axis micro-wind turbine | Semantic Scholar
What is a permanent magnet motor? - www.rizinia.com
Research on a hybrid excitation PM synchronous generator with stator third harmonic winding excitation - Xia - 2020 - IET Electric Power Applications - Wiley Online Library