A Class-E driven inductive power delivery system covering the complete upper body

Jourand, Philippe; Puers, Robert

doi:10.1016/j.sna.2012.06.004

Cited by 30 publications

(7 citation statements)

References 17 publications

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“…In the power amplifier, the typical mode of amplifications includes a class D or class E amplifier. Although both the class D and class E amplifiers are able to amplify the driving signal, class E is widely used since it has a better efficiency (theoretically it can achieve 100% efficiency) [60,61]. However, the performance of class E amplifiers is highly sensitive to the parameters of the load network (inductance of TC and resonating capacitor).…”

Section: Wpt System For Wcementioning

confidence: 99%

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Basar

Ahmad

Cho

et al. 2014

Sensors

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Wireless capsule endoscopy (WCE) is a promising technology for direct diagnosis of the entire small bowel to detect lethal diseases, including cancer and obscure gastrointestinal bleeding (OGIB). To improve the quality of diagnosis, some vital specifications of WCE such as image resolution, frame rate and working time need to be improved. Additionally, future multi-functioning robotic capsule endoscopy (RCE) units may utilize advanced features such as active system control over capsule motion, drug delivery systems, semi-surgical tools and biopsy. However, the inclusion of the above advanced features demands additional power that make conventional power source methods impractical. In this regards, wireless power transmission (WPT) system has received attention among researchers to overcome this problem. Systematic reviews on techniques of using WPT for WCE are limited, especially when involving the recent technological advancements. This paper aims to fill that gap by providing a systematic review with emphasis on the aspects related to the amount of transmitted power, the power transmission efficiency, the system stability and patient safety. It is noted that, thus far the development of WPT system for this WCE application is still in initial stage and there is room for improvements, especially involving system efficiency, stability, and the patient safety aspects.

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Section: Wpt System For Wcementioning

confidence: 99%

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Basar

Ahmad

Cho

et al. 2014

Sensors

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“…Due to obvious advantages in cost, size and efficiency, class-E PA is commonly used in the TX unit of the WPT system [16][17][18][19]. When the conditions of zero-voltage-switching (ZVS) and zero-derivative-switching (ZDS) are both satisfied, the theoretical efficiency of the PA can reach 100% [20].…”

Section: Transmitter Efficiencymentioning

confidence: 99%

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Shao

Líu

Fang

2016

Sci. China Technol. Sci.

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In the wireless power transfer system for freely moving biomedical implants, the receiving unit was generally inefficient for the reason that its design parameters including the receiving coil's dimension and receiving circuits' topology were always determined by experiments. In order to build the relationship between these parameters and the total transfer efficiency, this paper developed a novel efficiency model based on the impedance model of the coil and the circuit model of the receiving circuits. According to the design constraints, the optimal design parameters in the worst case were derived. The results indicate that the combination of the two-layered receiving coil and half-bridge rectifier has more advantages in size, efficiency and safety, which is preferred in the receiving unit. Additionally, when the load resistance increases, the optimal turn number of the receiving coil basically keeps constant and the corresponding transmitting current and total efficiency decrease. For 100 Ω load, the transmitting current and total efficiency in the worst case were measured to be 5.30 A and 1.45% respectively, which are much better than the published results. In general, our work provides an efficient method to determine the design parameters of the wireless power transfer system for freely moving biomedical implants.wireless power transfer system, capsule endoscope, freely moving biomedical implants, receiving coil, coil optimization, efficiency Citation: Shao Q, Liu H, Fang X L. Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants.

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“…The design and implementation of WPTS with high power transfer efficiency (PTE) are, however, challenging. In recent years, the research on PTC of the WPTS mainly focuses on how to improve the PTE and the uniformity of the generated magnetic field 11,13–18 . Unfortunately, compared with other inductive coupling WPT applications such as electric vehicles, 19 the PTE is always low as limited by the huge difference in size and the large air gap between the PTC and the PRC.…”

Section: Introductionmentioning

confidence: 99%

“…Different forms of PTC mentioned above mostly have strict requirements on the size of the coils and fixed distance between the coil pairs. Moreover, most of the existing WPTS for CR or CE not only have a large diameter (64–75 cm) of PTC but also have a large axial length, which makes it bulky and inconvenient for patients to move freely 16–18 …”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a wireless power transfer system for capsule robot using an optimised planar square spiral transmitting coil pair

Zhuang

Wang

Zhao

et al. 2022

Robotics Computer Surgery

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Background The wireless power transfer system (WPTS) is a promising way to continuously provide efficient and stable power for gastrointestinal capsule robots with active movement ability. Methods The proposed WPTS using an optimised planar square spiral transmitting coil pair with space‐saving structure can flexibly adjust the distance between the coils according to the patient's condition, and thus has better applicability. To improve power transfer efficiency and uniformity of the generated magnetic field, design parameters are discussed and optimised based on the analytical calculation and simulation analysis. Results The power demand can be guaranteed with spacing distance of 350–500 mm and the peak received power of 1124 mW with a remarkable transfer efficiency of 7.8% can be obtained when the spacing reaches the minimum. The human electromagnetic exposure safety in different situations is also discussed and verified. Conclusions The WPTS can provide power for capsule robots safely and efficiently.

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A Class-E driven inductive power delivery system covering the complete upper body

Cited by 30 publications

References 17 publications

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Design and analysis of a wireless power transfer system for capsule robot using an optimised planar square spiral transmitting coil pair

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