Lu, Qing; Zhu, Xiaoyong; Quan, Li; Zuo, Yuefei; Du, Sichen: 'Rotor position estimation scheme with harmonic ripple attenuation for sensorless controlled permanent magnet synchronous motors', IET Electric Power Applications, 2018, 12, (8), p. 1200-1206, DOI: 10.1049/iet-epa.2017.0858
IET Digital Library, https://digital-library.theiet.org/;jsessionid=3d688srbnvffr.x-iet-live-01content/journals/10.1049/iet-epa.2017.0858