Gael Messager, and Andreas Binder. “Six-Axis Rotor Magnetic Suspension Principle for Permanent Magnet Synchronous Motor With Control of the Positive, Negative and Zero-Sequence Current Components”. Applied Computational Electromagnetics Society Journal (ACES), vol. 32, no. 08, July 2021, pp. 657-62, https://journals.riverpublishers.com/index.php/ACES/article/view/9521.