Speed ControlOf Vector Controlled PMSM Drive Using Fuzzy Logic-PI Controller
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Date
2011-08
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Addis Ababa University
Abstract
This study is focused on the speed control performances of a Permanent Magnet Synchronous
Motor (PMSM). Usually, a proportional-integral (PI) controller is used as a speed controller
for a Permanent Magnet Synchronous Motor (PMSM) in high performance drive system
despite the existence of many modern nonlinear control techniques. However, a PI controller
is sensitive to speed changes, load disturbances and parameters variation without continuous
tuning of its gains. The conventional approach to these issues is to tune the proportional and
integral gains manually by observing the response of the system. The tuning of the PI
parameters must be made on-line and automatic in order to avoid tedious tasks in manual
control. The well-known Ziegler-Nichols method to tune the coefficients of a PI controller is
very simple, but cannot guarantee to be always effective. For this reason, this thesis proposed
the design of an on-line self tuning PI controller scheme using fuzzy logic controller (FLC).
The performance of the proposed controller is tested through a wide range of reference speeds
as well as with load variations through simulation using MATLAB/SIMULINK and Real
Time Workshop (RTW) packages. The developed controller algorithm with field oriented
control (FOC) is then simulated on a Texas Instruments TMS320F2812 Digital Signal
Processor (DSP) device simulator. In this thesis work a FLC comprising 49 rules is proposed
to improve the dynamic performance of the drive system. The simulation results show that the
speed response of the proposed drive is unaffected by load torque & parameters variation.
Furthermore, the developed controller works well even when the reference speed is changed
to more complex trajectory, i.e., the developed controller speed regulation is unaffected by
the nature of the reference speed trajectory. These shows remarkable performance
improvement compared to conventional PI speed controller.
Keywords: PMSM, On-line self tuning PI Controller, Fuzzy Logic, MATLAB/SIMULINK,
TMS320F2812 (DSP) device simulator.
Description
Keywords
PMSM, On-line self tuning PI Controller, Fuzzy Logic, MATLAB/SIMULINK, TMS320F2812 (DSP) device simulator