Power efficiency analysis of an input‑series–output‑series multichannel inductive power transfer system

Yan Liang; Dawei Ye; Haomin Shen; Rong Wang; Enguo Rong; Gang Yang

Power efficiency analysis of an input‑series–output‑series multichannel inductive power transfer system

Vol. 26, No. 3, pp. 523-534, Mar. 2026

10.1007/s43236-025-01094-2

Power efficiency analysis

Input-series–output-series (ISOS)

High-power inductive power transfer (IPT)

Optimal parameter design

Abstract

At present, the demand for high-power supply is becoming increasingly intense for certain scenarios, such as the fast charging of electric vehicles and shore-based power systems. To achieve high-power wireless power transmission, the input-series– output-series multichannel topology is introduced in this study, and an analysis of power efficiency is conducted to guide the construction of the proposed system. First, the basic transmission characteristic is analyzed under resonant state. Then, the theoretical expressions for the power loss of the whole system, which primarily includes the losses of coils and converters, are established. Based on the theoretical results, the efficiency performance of the proposed system is analyzed under different numbers of channels and load conditions. Subsequently, the theoretical optimal points for load and number of channels are determined and verified via simulations. Finally, two experimental prototypes, which consist of two channels and three channels, are built to verify the theoretical conclusion. Based on the optimal load design, the efficiency of the proposed twochannel and three-channel systems can reach up to 93.75% and 94.13%, respectively. The changing trend of power efficiency against number of channels and load conditions is consistent with the theoretical conclusions.

Statistics

Show / Hide Statistics

Statistics (Past 3 Years)
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]

Y. Liang, D. Ye, H. Shen, R. Wang, E. Rong, G. Yang, "Power efficiency analysis of an input‑series–output‑series multichannel inductive power transfer system," Journal of Power Electronics, vol. 26, no. 3, pp. 523-534, 2026. DOI: 10.1007/s43236-025-01094-2.

[ACM Style]

Yan Liang, Dawei Ye, Haomin Shen, Rong Wang, Enguo Rong, and Gang Yang. 2026. Power efficiency analysis of an input‑series–output‑series multichannel inductive power transfer system. Journal of Power Electronics, 26, 3, (2026), 523-534. DOI: 10.1007/s43236-025-01094-2.