Accurate harmonic analysis of dual‑frequency inverter considering dead‑time effect

Wireless power transfer (WPT) systems or simultaneous wireless information and power transfer (SWIPT) systems support multiple charging frequency standards and usually transmit two or more frequencies simultaneously. Multi-frequency sinusoidal pulse width modulation (MF-SPWM) technology can output multiple sine wave frequencies at the same time with only one inverter, which effectively reduces the system size and improves compatibility. However, MF-SPWM and dead-time make the MF-inverter highly nonlinearized, with significant effects on the desired frequencies and the total harmonic distortion (THD) of the multi-frequency output. In this paper, a double Fourier series-based method of harmonic analysis for the dual-frequency inverter (DF-inverter) is proposed, which can accurately calculate the magnitude of each of the harmonics in the output of the DF-inverter taking into account the influence of dead-time. The calculation methods of the minimum pulse width and voltage THD of the DF-inverter are provided. An analysis shows that when the dead-time is less than the minimum pulse width, its influence is negligible. Meanwhile, when the dead-time is slightly larger than the minimum pulse width, there is a trade-off between the desired frequency component and the THD. Experimental results are given and they are consistent with the analytical results of the proposed method, and the error is within 2%.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

J. Wu, Z. Yang, W. Wang, Y. Chen, Z. Wu, J. Zhang, J. Pan, V. Snasel, "Accurate harmonic analysis of dual‑frequency inverter considering dead‑time effect," Journal of Power Electronics, vol. 24, no. 9, pp. 1476-1489, 2024. DOI: 10.1007/s43236-024-00795-4.

[ACM Style]

Jie Wu, Zhiliang Yang, Wenlei Wang, Yafei Chen, Zhenjun Wu, Jitao Zhang, Jeng-Shyang Pan, and Vaclav Snasel. 2024. Accurate harmonic analysis of dual‑frequency inverter considering dead‑time effect. Journal of Power Electronics, 24, 9, (2024), 1476-1489. DOI: 10.1007/s43236-024-00795-4.