Design of a High Efficiency Resonator for Wireless Power Transfer

Jang, Yohan; Kwon, Jaesoon; Park, Jae-Su; Choi, Jaehoon

doi:10.5515/kjkiees.2011.22.9.820

Cited by 4 publications

(1 citation statement)

References 4 publications

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“…하 지만 하나의 송신기로 수요 전력이 다른 다양한 장비를 충전하는 것은 어렵다. 이를 보완하기 위해 무선 전력 전 송 시스템을 구성하는 송신기, 공진기, 수신기에 대한 다 양한 연구가 진행되고 있다 [1]∼ [19] . 시스템의 송신기에 주 로 사용되는 Class E 전력증폭기는 고효율로 동작하지만 고조파를 충분히 저감할 수 없다.…”

Section: ⅰ 서 론unclassified

Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction

Nam¹,

Oh²,

Bae³

et al. 2023

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we present a high-efficiency wireless power transfer system with design and measurements, for three different types of receivers. The transmitter for the system uses a Class E/F 3 power amplifier with second harmonic reduction to reduce distortion, a resonator, and three different types of receivers. The proposed transmitter uses a harmonic filter to reduce distortion, and is designed to be a load-dependent voltage source, which means that it generates output power according to the load impedance. The resonator is designed to match the impedance of the receivers by using design parameters between the coils of the transmitter and the receivers. The receivers are designed using a rectifier based on four Schottky diodes. Experimental results show that the proposed wireless power transfer system can operate with received power of 17.5∼37.1 W and system efficiency of 71.6∼75.5 % for three types of receivers.

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Section: ⅰ 서 론unclassified

Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction

Nam¹,

Oh²,

Bae³

et al. 2023

J. Korean Inst. Electromagn. Eng. Sci.

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A Metal Detector for Clip Location Tracking of Stomach and Colon Cancer during Laparoscopic Surgery

2022

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In laparoscopic surgery for colorectal and gastric cancer, it is difficult to locate the tumor in the cavity for excision. Tumors in the colon or stomach are blocked by mucous membranes; thus, the view from the cavity is obscured. Therefore, to determine the location of the tumor, a marker can be installed around the tumor and the location of the tumor can be found using a sensor. Until now, most of the clip-detectors that have been developed can detect the location of tumors for either colorectal or gastric cancer. The research on the development of a detector that can detect the location of tumors for both colorectal and gastric cancer, is insufficient. Most detectors for tumor location determination are devised using a magnet by connecting a wire to a clip. In this method, the position of the magnet moves along the length of the wire. Therefore, it is difficult for the detector to detect the exact location of the tumor. Based on this method, this study designs a clip maker to determine the location of a tumor and a detector that can detect the clip. The clip and the sensing element are directly connected. The clip is developed using ferrite and coil to generate a magnetic field induced by an eddy current in the metal (clip), and the detector is designed using the Colpitts oscillator to induce a magnetic field. After installing the prepared clip at the tumor location, the detector is used to detect the clip, and accordingly, the location of the tumor can be identified using the detector. To test the performance of the clip and detector, we conducted animal experiments. In the course of the animal experiment, four clips were installed in the colon and stomach, and we succeeded in detecting all the clips. Because the clip-detector is used to locate the tumor during laparoscopic surgery, an endoscope must be used. Therefore, it is predicted that the demand for laparoscopic surgery and endoscopic medical industry will increase because of the clip-detector.

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Efficiency and EMF Safety Analysis of Wireless Power Transfer System Using Standard Human Model

Shin¹,

Byun²

2013

Journal of the Korean Institute of Illuminating and Electrical

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Design of a High Efficiency Resonator for Wireless Power Transfer

Cited by 4 publications

References 4 publications

Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction

Wireless Power Transfer System Using Class E/F3 Power Amplifier with Second Harmonic Reduction

A Metal Detector for Clip Location Tracking of Stomach and Colon Cancer during Laparoscopic Surgery

Efficiency and EMF Safety Analysis of Wireless Power Transfer System Using Standard Human Model

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