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A Triple-Cycloconverter-Based Soft-Start Control Strategy

Author(s):

Zhengwang Xu, Yuchun Yi*, Yutong Sun, Jiarui Zhang, Cheng Chen, Jiaqi Yu, Wei Mei and Xiangkui Wan   Pages 1 - 6 ( 6 )

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

Affiliation:

School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan, School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan



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