Liu, Y., Zhang, Z., Wang, C., Geng, W., & Yang, T. (2021). Design and Analysis of Oil-Immersed Cooling Stator With Nonoverlapping Concentrated Winding for High-Power Ironless Stator Axial-Flux Permanent Magnet Machines. IEEE Transactions on Industrial Electronics, 68(4), 2876-2886. https://doi.org/10.1109/tie.2020.2978694