Three-phase Wireless Power Supply System Using Matrix Converter

Itoh, Jun‐ichi; Yamanokuchi, Koki; Takuma, Shunsuke; Kusaka, Keisuke

doi:10.23919/epe.2019.8914969

Cited by 4 publications

(3 citation statements)

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“…This paper proposes a WPT system with three‐phase‐to‐three‐phase matrix converter and a commutation method 9,10 . Particularly, in addition to the previous reports, 9,10 this paper presents a new design of transmission coils, and provides detailed explanations about control of the matrix converter.…”

Section: Introductionmentioning

confidence: 99%

“…A number of issues must be addressed when applying matrix converters to high‐frequency output power supplies, one of them being commutation. Current commutation or voltage commutation are used conventionally; in so doing, direction of output current must be detected to determine commutation sequence and to provide commutation error compensation 9 . However, in applications with high‐frequency output as is the case with WPT, it is difficult to detect current direction without phase delays.…”

Section: Introductionmentioning

confidence: 99%

“…This paper proposes a WPT system with three-phaseto-three-phase matrix converter and a commutation method. 9,10 Particularly, in addition to the previous reports, 9,10 this paper presents a new design of transmission coils, and provides detailed explanations about control of the matrix converter. In the proposed method, direction of output current is estimated using a feature of matrix converter which is that output power factor is close to 1 when transmission frequency is near resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

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Three‐phase wireless power supply system using a matrix converter

Yamanokuchi

Kusaka

Itoh

2023

Elect Comm in Japan

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This paper proposes a three-phase wireless power transfer (WPT) system with a three-phase-to-three-phase matrix converter. The proposed system directly converts power from an AC grid to high-frequency AC for WPT. The three-phase WPT system with the matrix converter is effectively expands the lifetime of the WPT system. A novel hybrid commutation method, which is suitable for the WPT system with a resonant characteristic, is proposed to avoid the commutation failure of the matrix converter. The strategy of the proposed hybrid commutation is based on an estimation of the current direction considering the resonant characteristics and elimination of commutation in the critical area. The proposed commutation method achieves an AC input-current total harmonic distortion (THD) of 4.7% with the resonant three-phase load without a current sensor on the high-frequency side. Furthermore, the proposed WPT system achieves a system efficiency of 88.2% at a load of 4 kW.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%