SIMULINK/MODELSIM CO-SIMULATION OF FPGA-BASED PI SPEED CONTROL FOR PMSM DRIVE STUDENT: PHAM VAN DUNG ID: MA02B205 ELECTRICAL ENGINEERING DEPARTMENT SOUTHERN TAIWAN UNIVERSITY OF TECHNOLOGY

CONTENT Abstract Introduction System Description of PMSM Drive and PI Speed Controller Design Simulink/Modelsim Co-Simulation of PMSM Drive Conclusion References

ABSTRACT The basic principle of (SVPWM) and the design of a PI-control based speed control IC for PMSM from Simulink/Modelsim cosimulation is presented Firstly, a SVPWM algorithm, vector control method and PI controller are derived and applied in the speed control IC of PMSM drive Secondly, Verilog that is Hardware Description Language is adopted to describe the behavior of the aforementioned control algorithms. Finally, Simulations and the results will be discussed.

INTRODUCTION -PMSM -FPGA -Electronic Design Automation (EDA) Simulator Link -A co-simulation by EDA Simulator Link is applied to PI-control based speed control IC for PMSM drive. -The Simulink/Modelsim co-simulation architecture is shown in Fig.1 -The PMSM, inverter and speed command are performed in Simulink and the proposed speed control IC described by Verilog code is executed in ModelSim

FIG.1. THE SIMULINK/MODELSIM CO-SIMULATION ARCHITECTURE

SYSTEM DESCRIPTION OF PMSM DRIVE AND PI SPEED CONTROLLER DESIGN -The Mathematical Model of PMSM -Design of Current controller and Coordinate Transformation (CCCT) -Design of PI controller

THE MATHEMATICAL MODEL OF PMSM where v d, v q are the d and q axis voltages; i d, i q, are the d and q axis currents, r s is the phase winding resistance; L d, L q are the d and q axis inductance; is the rotating speed of magnet flux; is the permanent magnet flux linkage.

DESIGN OF CURRENT CONTROLLER AND COORDINATE TRANSFORMATION (CCCT)

WHICH USES ONE ADDER, ONE MULTIPLIER, AN 1-B LEFT SHIFTER, A SIN/COS LOOK-UP-TABLE AND MANIPULATES 24 STEPS MACHINE TO CARRY OUT THE OVERALL COMPUTATION OF CCCT

DESIGN OF PI CONTROLLER where Kp is proportional coefficient, Ki is integral coefficient, Yn(n) is the output control volume in the n-sampling time, e(n) is the input deviation in the n-sampling time, e(n-l) is the input deviation in the (n-l )-sampling time.

The designed PI controller circuit adopted by using the FSM method is proposed and shown in this figure which uses one adder, one multiplier, and manipulates 10 steps

SIMULINK/MODELSIM CO-SIMULATION OF PMSM DRIVE

Fig. 10 The Vector Control Block Diagram for PMSM

SIMULATION RESULTS Simulation results of SVPWM waveform(STEP1)

Fig. 12 Simulation results of step speed respond, two-axis current respond and three phase current response

CONCLUSION This study has been successfully presented a speed control IC for PMSM drive and demonstrated its performance from Simulink/ModelSim co-simulation.Via this design methodology, the Verilog code of the speed control IC can be fast developed, and the risk in experimental development can be greatly reduced.

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