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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.
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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
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