Dual SOGI-Network Based Current Ripple and Position Error Fluctuation Elimination for PMSM Sensorless Drives

Conference: PCIM Asia 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/26/2018 - 06/28/2018 at Shanghai, China

Proceedings: PCIM Asia 2018

Pages: 5Language: englishTyp: PDF

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Zhang, Guoqiang; Wang, Gaolin; Xu, Dianguo (Harbin Institute of Technology, China)

The current ripples and position error fluctuations caused by inverter nonlinearities and flux spatial harmonics degrade the control performance for the position sensorless interior permanent magnet machine (IPMSM) drives. A dual second-order general integrator (SOGI) harmonic decoupling network (HDN) based compensation scheme is proposed and developed. A set of SOGI-HDN is adopted to track the position and speed information, eliminating the 6th position error fluctuation; and meanwhile, another set of SOGI-HDN is utilized to detect the voltage error in time, which is added to the output as a feedforward term for compensating the inverter nonlinearities, reducing the 6th d-q-axis current ripples and improving the dynamic performance. Comparative results on a 2.2-kW IPMSM drive verified the effectiveness of the proposed dual SOGI-HDN on eliminating the current ripples and position error fluctuations.