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Vol. 159, Issue 11, November 2013, pp. 198-205




A Multilevel SVPWM Algorithm for Linear Modulation and Over Modulation Operation
Wei Wu, Jianguo Jiang, Guifeng Wang, Shutong Qiao, He Liu

Key Laboratory of Power Transmission and Power Conversion Control (Shanghai Jiaotong University), Shanghai, 200030, China
Tel.: +8615365893265, fax: +86 516 83882453
E-mail: journey_wu@126.com


Received: 27 August 2013   /Accepted: 25 October 2013   /Published: 30 November 2013

Digital Sensors and Sensor Sysstems


Abstract: The multilevel space vector pulse width modulation (SVPWM) is widely used for a multilevel inverter. However, the implementation of the SVPWM for a multilevel inverter is complicated. The complexity is due to the difficulty in determining the location of the reference vector, the calculation of on-times, and the determination and selection of switching states. This paper proposes a general SVPWM algorithm for multilevel inverters based on standard two-level SVPWM. Since the proposed multilevel SVPWM method uses two-level modulation to calculate the on-times, the computation of on-times for an n-level inverter becomes easier. The proposed SVPWM algorithm can be applied in both linear and over-modulation region. A five-level HNPC inverter is used to explain the proposed method. The scheme can be easily extended to a multi-level inverter. Finally, experimental results verify the validity of the method in this paper. In this paper, the design and implementation details of wireless ad-hoc terminals are proposed to build a rapidly deployable, frequency-agile, heterogeneous wireless network.


Keywords: Multilevel, SVPWM, Over-modulation, Linear modulation, HNPC inverter.


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