An Improved Wavelet PWM Technique with Output Voltage Amplitude Control for Single-phase Inverters

Chun-Fang Zheng; Bo Zhang; Dong-Yuan Qiu; Xiao-Hui Zhang; Rui Li

An Improved Wavelet PWM Technique with Output Voltage Amplitude Control for Single-phase Inverters

Vol. 16, No. 4, pp. 1407-1414, Jul. 2016

10.6113/JPE.2016.16.4.1407

Inverter

Total harmonic distortion (THD)

Voltage modulation ratio

Wavelet modulation

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Abstract

Unlike existing pulse-width modulation (PWM) techniques, such as sinusoidal PWM and random PWM, the wavelet PWM (WPWM) technique based on a Harr wavelet function can achieve a high fundamental component for the output voltage, low total harmonic distortion, and simple digital implementation. However, the original WPWM method lacks output voltage control. Thus, the practical application of the WPWM technique is limited. This study proposes an improved WPWM technique that can regulate output voltage amplitude with the addition of a parameter. The relationship between the additional parameter and the output voltage amplitude is analyzed in detail. Experimental results verify that the improved WPWM exhibits output voltage control in addition to all the merits of the WPWM technique.

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Cite this article

[IEEE Style]

C. Zheng, B. Zhang, D. Qiu, X. Zhang, R. Li, "An Improved Wavelet PWM Technique with Output Voltage Amplitude Control for Single-phase Inverters," Journal of Power Electronics, vol. 16, no. 4, pp. 1407-1414, 2016. DOI: 10.6113/JPE.2016.16.4.1407.

[ACM Style]

Chun-Fang Zheng, Bo Zhang, Dong-Yuan Qiu, Xiao-Hui Zhang, and Rui Li. 2016. An Improved Wavelet PWM Technique with Output Voltage Amplitude Control for Single-phase Inverters. Journal of Power Electronics, 16, 4, (2016), 1407-1414. DOI: 10.6113/JPE.2016.16.4.1407.