Abstract
Twice ripple power exists in single-phase to three-phase reduced-switch induction motor drives, which degrades the performance of the drive system, such as larger total harmonic distortion of the grid current, the larger ripple voltage in the dc link and the larger torque ripple. Most existing power decoupling schemes are open-loop decoupling methods. However, the open-loop decoupling method has the disadvantages of heavy computation and strong dependency of parameters. This paper analyzes all steady state solutions of the decoupling capacitor voltage from the point of view of solving differential equations and presents a unified multi-proportional-resonant closed-loop decoupling method to suppress the ripple voltage on the dc bus. The whole drive system adopts a hybrid predictive control strategy with dual loops to coordinate the operation of each part. Comprehensive experimental results are presented to verify the effectiveness of the presented method.
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Acknowledgements
This work was supported in part by the National Key R&D Program of China under Grant 2018YFB0606005, in part by the National Natural Science Foundation of China under Grant No. 61933011, in part by the Major Project of Changzhutan Self-dependent Innovation Demonstration Area under Grant 2018XK2002, in part by the Project of Innovation-driven Plan in Central South University under Grant 2019CX003, in part by the Scientific Research Project of Hunan Department of Education under Grant No. 18C0787, in part by the CRRC Zhuzhou Electric Locomotive Institute Co., Ltd.
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Shi, S., Sun, Y., Dan, H. et al. A general closed-loop power-decoupling control for reduced-switch converter-fed IM drives. Electr Eng 102, 2423–2433 (2020). https://doi.org/10.1007/s00202-020-01023-5
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DOI: https://doi.org/10.1007/s00202-020-01023-5