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CONSTRAINED STATE FEEDBACK SPEED CONTROL OF PMSM BASED ON MODEL PREDICTIVE APPROACH ABSTRACT This paper presents constrained state feedback speed control of permanent magnet synchronous motor (PMSM). Based on classical control theory, non-linear state-space model of PMSM is developed. A simple linearization procedure is employed to design linear state feedback controller (SFC). Digital redesign of SFC is carried out to achieve discrete form suitable for implementation in a DSP. Model predictive approach is used to a posteriori constraint introduction into control system. It overcomes limitations of motion control system with non-constrained state feedback controller resulting in low dynamic properties. The novel concept utilizes machine voltage equation model to calculate the boundary values of control signals which provide permissible values of the future state variables. Secondary control objectives, such as zero d-axis current are included. Simulation and experimental results are presented to validate the proposed constrained state feedback control algorithm in comparison to non-constrained state feedback control and cascade control structure respectively. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail: [email protected] , Ph: 9885112363 / 040 44433434 1 BLOCK DIAGRAM FOR PROPOSED SYSTEM Fig. 3. Schematic block diagram of PMSM drive system with SFC and MPAC algorithm DESIGNG SOFTWARE AND TOOLS: MAT LAB /SIMULATION Software and sim power systems tools are used. Mainly control system tools, power electronics and electrical elements tools are used. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail: [email protected] , Ph: 9885112363 / 040 44433434 2