Steady-State Integral Proportional Integral Controller for PI Motor Speed Controllers


Vol. 15, No. 1, pp. 177-189, Jan. 2015
10.6113/JPE.2015.15.1.177


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 Abstract

The output of the controller is said to exceed the input limits of the plant being controlled when a control system operates in anon-linear region. This process is called the windup phenomenon. The windup phenomenon is not preferable in the control systembecause it leads to performance degradation, such as overshoot and system instability. Many anti-windup strategies involveswitching, where the integral component differently operates between the linear and the non-linear states. The range of state for thenon-overshoot performance is better illustrated by the boundary integral error plane than the proportional?integral (PI) plane inwindup inspection. This study proposes a PI controller with a separate closed-loop integral controller and reference value set withrespect to the input command and external torque. The PI controller is compared with existing conventional proportional integral,conditional integration, tracking back calculation, and integral state prediction schemes by using ScicosLab simulations. Thecontroller is also experimentally verified on a direct current motor under no-load and loading conditions. The proposed controllershows a promising potential with its ability to eliminate overshoot with short settling time using the decoupling mode in bothconditions.


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Cite this article

[IEEE Style]

C. L. Hoo, S. M. Haris, E. C. Y. Chung, N. A. N. Mohamed, "Steady-State Integral Proportional Integral Controller for PI Motor Speed Controllers," Journal of Power Electronics, vol. 15, no. 1, pp. 177-189, 2015. DOI: 10.6113/JPE.2015.15.1.177.

[ACM Style]

Choon Lih Hoo, Sallehuddin Mohamed Haris, Edwin Chin Yau Chung, and Nik Abdullah Nik Mohamed. 2015. Steady-State Integral Proportional Integral Controller for PI Motor Speed Controllers. Journal of Power Electronics, 15, 1, (2015), 177-189. DOI: 10.6113/JPE.2015.15.1.177.