Observer-based Integral Sliding Mode Control for Sensorless PMSM Drives Using FPGA

Publisher:
IEEE
Publication Type:
Conference Proceeding
Citation:
IEEE 2013 International Conference on Control, Automation and Information Sciences, 2013, pp. 212 - 217
Issue Date:
2013-01
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This paper presents the design and evaluation of an observer-based integral sliding mode controller for sensorless Permanent Magnet Synchronous Motor (PMSM) drive based on the Field Programmable Gate Array (FPGA) technology. For enhancement of robustness, a flux angle estimator mainly constructed by an improved sliding mode observer is utilized to estimate the current and back electromotive force (EMF) as well as to derive the flux angle. These estimated values together with the computed rotor speed of the motor are fed back for the control purpose in both the current loop and the speed loop. To increase the performance of PMSM speed control, an integral sliding mode control (ISMC) is designed with integral operation to improve steady state performance against parameter variations and external disturbances. The developed controller has been implemented in an FPGA-based environment and the very high speed integrated circuit-hardware description language (VHDL) is adopted to show advantages of the proposed control system. By integrating the observer-based and integral sliding mode control techniques into speed control of a PMSM drive, the system performance can be substantially enhanced while improving its cost-effectiveness and reliability. The validity of the proposed approach is verified through simulation results based on the VHDL Modelsim and Simulink co-simulation method.
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