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Vol. 173, Issue 6, June 2014, pp. 124-131




Three-level Discontinuous Space Vector Modulation at Low Switching Frequency

Ji Zhang, Tian-Xiang Chen, Yan-Qing Peng

The School of Electrical Engineering and Automation, Xiamen University of Technology Xiamen, 361024, China
Tel.: +86-13799269537, fax: +86-05926291057

E-mail: 221zhangji@163.com


Received: 30 May 2014 /Accepted: 27 June 2014 /Published: 30 June 2014

Digital Sensors and Sensor Sysstems


Abstract: The three-level discontinuous pulse-width modulation (DPWM) which can reduce switching frequency while restrain the switching loss of high power converters was proposed. Space- vector discontinuous modulation (SVDM) suitable for digital implement was also presented. Detailed analysis were given to verify the control performance of the two recommended SVDM methods and traditional space vector modulation (SVM) in switching loss and harmonic characteristic field. Three- level neutral-point-clamped (neutral-point-clamped, NPC) SVDM rectifiers were designed to evaluate their behavior in neutral-point potential control, robustness and static and dynamic response. The correctness and feasibility of the proposed control scheme are verified by the simulating and experimental tests.


Keywords: Switching loss, Discontinuous modulation, Space vector control, Three-level NPC rectifier.


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