Jinji Sun received the Ph.D. degree in instrument science and technology from Beihang University, Beijing, China, in 2010. He is currently with the School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China, and also with the Ningbo Institute of Technology, Beihang University, Ningbo 315800, China. His research interests include the design of novel various types of magnetic bearings and magnetic shielding.