Simplified SVPWM that Integrates Overmodulation and Neutral Point Potential Control

Rong-Wu Zhu; Xiao-Jie Wu

Simplified SVPWM that Integrates Overmodulation and Neutral Point Potential Control

Rong-Wu Zhu

Xiao-Jie Wu

Vol. 14, No. 5, pp. 926-936, Sep. 2014

10.6113/JPE.2014.14.5.926

Asynchronous induction motor

Grid inverter

Neutral point potential

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Abstract

A simplified and effective space vector pulse-width modulation (SVPWM) algorithm with two and three levels for three-phasevoltage-source converters is proposed in this study. The proposed SVPWM algorithm only uses several linear calculations onthree-phase modulated voltages without any complicated trigonometric calculations adopted by conventional SVPWM. Thissimplified SVPWM also avoids choosing the vector sector required by conventional SVPWM. A two-level overmodulationscheme is integrated into the proposed two-level SVPMW to generate the output voltage that increases from a linear region to asix-step state with a smoothly linear transition characteristic and a simple overmodulation process without a lookup table andcomplicated nonlinear functions. The three-level SVPWM with a proportional-integral controller effectively balances the neutralpoint potential of the neutral point clamped converter. Results from the simulation in MATLAB/Simulink and the experimentbased on a digital signal processor are provided to clearly demonstrate the validity and effectiveness of the proposed strategies.

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Cite this article

[IEEE Style]

R. Zhu and X. Wu, "Simplified SVPWM that Integrates Overmodulation and Neutral Point Potential Control," Journal of Power Electronics, vol. 14, no. 5, pp. 926-936, 2014. DOI: 10.6113/JPE.2014.14.5.926.

[ACM Style]

Rong-Wu Zhu and Xiao-Jie Wu. 2014. Simplified SVPWM that Integrates Overmodulation and Neutral Point Potential Control. Journal of Power Electronics, 14, 5, (2014), 926-936. DOI: 10.6113/JPE.2014.14.5.926.