Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 70, Issue 11, Pages 10923-10934Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2022.3231248
Keywords
Induction motor (IM) drives; nonlinear control gain; second-order terminal sliding-mode (SO-TSM); speed controller; torque rejection capability
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This article proposes a second-order terminal sliding-mode (SO-TSM) speed controller with nonlinear control gain for high-end industrial application of induction motors. The method introduces a convergence trajectory without speed overshoot by designing a SO-TSM manifold, and compensates external disturbance with an integral term control law using the antiwindup mechanism. The torque rejection capability of the method is represented by the gain value of the integral term, and the experimental results demonstrate its strong torque rejection capability.
For the high-end industrial application of induction motors (IMs), the speed controller is expected to possess strong torque rejection capability to suppress the speed fluctuation. To accomplish this goal, this article proposes a second-order terminal sliding-mode (SO-TSM) speed controller with nonlinear control gain. First, a SO-TSM manifold is designed to introduce the convergence trajectory without speed overshoot. Second, an integral term control law is constructed to compensate external disturbance with the antiwindup mechanism. The analysis of convergence trajectory shows that the torque rejection capability of the studied method is represented by the gain value of the integral term. Thus, the studied nonlinear control gain can improve the torque rejection capability and suppress the chattering simultaneously. Finally, the experimental results from a 3.7 kW IM test bench reveal the strong torque rejection capability of the studied method.
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