A Triple-Cycloconverter-Based Soft-Start Control Strategy

(E-pub Ahead of Print)

Author(s): Zhengwang Xu, Yuchun Yi*, Yutong Sun, Jiarui Zhang, Cheng Chen, Jiaqi Yu, Wei Mei, Xiangkui Wan.

Journal Name: Recent Advances in Electrical & Electronic Engineering
Formerly Recent Patents on Electrical & Electronic Engineering

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Abstract:

Objective: The use of multiple-stage cycloconverters is suitable for variable-frequency speed control of high-voltage, large-capacity motors, for which it is sometimes necessary to establish separate controls for variable-frequency operation and the start-up phase. This approach effectively limits the starting current of the large-capacity motor by switching the phase relationship of the triple circuit’s output voltages to control the overall output voltage.

Methods: We analyze a triple circuit using voltage vector analysis and simulation analysis with MATLAB modeling.

Results: We find that our tr iple soft-start control strategy can be applied to large-capacity motors, as this strategy results in a pure sine wave output voltage and current, and maintains balance in the three-phase voltage during startup.

Keywords: Triple cycloconverter, soft-start, vector analysis

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Article Details

(E-pub Ahead of Print)
DOI: 10.2174/2352096512666181127150931
Price: $95