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Energies 2018, 11(2), 282; https://doi.org/10.3390/en11020282

Speed Synchronous Control of Multiple Permanent Magnet Synchronous Motors Based on an Improved Cross-Coupling Structure

School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
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Received: 1 January 2018 / Revised: 19 January 2018 / Accepted: 23 January 2018 / Published: 24 January 2018
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Abstract

Regarding the shortcomings of the cross-coupling control structure during the start-up of a multi-motor with load—namely, a large synchronization error and a long start-up time—this paper proposes a fuzzy self-adjusting cross-coupling control structure. This structure combines a fuzzy self-adjusting filter and an advanced synchronization compensator. The fuzzy self-adjusting filter adjusts the “softened speed”, a newly established concept, so that each motor follows the trajectory of the softened speed during start-up, thus effectively reducing the synchronization error of the starting process. The advanced synchronization compensator is added to shorten the adjusting time of the motors. In addition, this paper analyzes the synchronization performance of the structure when the steady state is interrupted by a sudden step of load. Finally, this paper establishes an experimental platform for a synchronous speed control system for a permanent magnet synchronous motor, and verifies the effectiveness of the proposed structure and the correctness of the theoretical analysis through performing experiments. View Full-Text
Keywords: fuzzy self-adjusting filter model; softened speed; advanced synchronization compensator; cross-coupling control; speed synchronous control fuzzy self-adjusting filter model; softened speed; advanced synchronization compensator; cross-coupling control; speed synchronous control
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Chen, W.; Liang, J.; Shi, T. Speed Synchronous Control of Multiple Permanent Magnet Synchronous Motors Based on an Improved Cross-Coupling Structure. Energies 2018, 11, 282.

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