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http://dx.doi.org/10.5207/JIEIE.2014.28.11.112

A Performance Improvement Method of PMSM Torque Control Considering DC-link Voltage Variation  

Lee, Jung-Hyo (Automotive Components Development 4 Team, LG Innotek)
Won, Chung-Yuen (School of Inf. and Comm., Sungkyunkwan Univ.)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.28, no.11, 2014 , pp. 112-122 More about this Journal
Abstract
This paper proposes a PMSM torque control method considering DC-link voltage variation and friction torque. In general EV/HEV application, two dimensions look-up table(2D-LUT) is used for reference current generation due to its stable and robust torque control performance. Conventionally, this 2D-LUT is established by flux-torque table to overcome the DC-link voltage variation. However, the flux table establishment is more complex than the speed table establishment. Moreover, one flux data reflects several speed conditions in variable DC-link voltage, friction torque cannot be considered by using the flux table. In this paper, speed-torque 2D-LUT is used for current reference generation. With this table, PMSM torque control is well achieved regardless of DC-link voltage variation by the proposed control method. Simulation and experimental results validate improvement of torque control error through friction torque compensation.
Keywords
PMSM Torque Control; DC-link Voltage Variation; 2D-LUT; Friction Torque Compensation;
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