article · IEEE Transactions on Power Electronics
A new supertwisting sliding mode direct thrust control scheme has been developed to enhance the dynamic response, robustness, and overall drive performance of linear induction machines. The method incorporates a novel supertwisting sliding mode algorithm into both the primary flux-linkage and electromagnetic thrust control loops. Compared to conventional control approaches, this strategy achieves a faster dynamic response, reduced steady-state speed tracking error, and lower electromagnetic thrust ripple, alongside greater resilience against load variations. The control design, implementation steps, and stability analysis were fully examined. The performance of the scheme was validated through comprehensive simulations and experimental testing using a three-kilowatt arc induction machine prototype.
Linear induction machines require precise and reliable control under changing operating conditions. By mitigating thrust ripple and speed tracking errors while speeding up response times, this control scheme improves overall machine stability and drive performance. Such refinements help ensure that electric linear drives maintain dependable, smooth operation even when subjected to sudden disturbances and load fluctuations.
This control technique is applicable to electric linear drives and industrial motor systems. It is primarily relevant to power electronics engineers and motor drive manufacturers looking to reduce thrust ripple and handle varying loads. The work represents applied research that has been tested in a laboratory setting, having achieved validation on a three-kilowatt experimental prototype rather than in a full-scale commercial deployment.
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In this article, a new supertwisting sliding mode direct thrust control (NSTSM-DTC) scheme is proposed to improve the dynamic response, robustness ability of the linear induction machine, and overall drive performance. First, a NSTSM algorithm is proposed and implemented in both electromagnetic thrust and primary flux-linkage control loops. The design aspects, implementation process, and stability analysis of the NSTSM based on the DTC method are fully investigated, which can effectively achieve faster dynamic response, smaller steady state speed tracking error, lower electromagnetic thrust ripple, and increase the system robustness against load variation in comparison to those of the conventional control methods. The proposed method is fully confirmed by the comprehensive simulations and experiments based on one prototype of 3 kW arc induction machine.
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DOI: 10.1109/tpel.2021.3096066
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