A low switching frequency AC-DC boost converter for wireless powered miniaturized implants

Jiang, Hao; LaRiviere, Ben; Lan, Di; Zhang, Junmin; Wang, Jing; Fechter, Richard; Harrison, Michael R.; Roy, Shuvo

doi:10.1109/biowireless.2014.6827739

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…For the second and third terms of the inductor current, the transient response of the circuit in Φ fall should be solved. The characteristic equation of this phase is similar to (7) except that here α and ω 0 are as follows:…”

Section: 23mentioning

confidence: 99%

“…This way, the characteristic equation in this phase usually has an over-damped response. The initial condition for (7) in Φ fall can be obtained from I 0 and V o2 as follows:…”

Section: 23mentioning

confidence: 99%

“…It should be noted that the variation of the received signal accounts for several reasons such as the variation in distance or angle between the power transmitting and receiving coils and also because of the wetness of the path between these two coils. In , AC to DC boost converters with the switching frequency of 2 ~ 100 times higher than the frequency of the input power signal are proposed. In these techniques, although the required DC voltage is successfully achieved, however, the high switching rate decreases the efficiency of the regulator because of the large power dissipation on their power switches.…”

Section: Introductionmentioning

confidence: 99%

“…In [7,8], AC to DC boost converters with the switching frequency of 2~100 times higher than the frequency of the input power signal are proposed. In these techniques, although the required DC voltage is successfully achieved, however, the high switching rate decreases the efficiency of the regulator because of the large power dissipation on their power switches.…”

Section: Introductionmentioning

confidence: 99%

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A power efficient buck‐boost converter by reusing the coil inductor for wireless bio‐implants

Barati

Yavari

2017

Circuit Theory & Apps

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Summary In this paper, a buck‐boost converter circuit for wireless power transfer via inductive links in bio‐implantable systems is presented. The idea is based on reusing the power receiver coil to design a regulator. This method employs five switches to utilize the coil inductor in a frequency other than the power‐receiving signal frequency. Reusing the coil inductor decreases the on‐chip regulator area and makes it suitable for bio‐implants. Furthermore, in the proposed technique, the regulator efficiency becomes almost independent of the coil receiving voltage amplitude. The proposed concept is employed in a buck‐boost regulator, and simulation results are provided. For a 10 MHz received signal with the amplitude variation within 3 ~ 6 V and with the converter switching rate of 200 kHz, the achieved maximum efficiency is 78%. The proposed regulator can also deliver 10 μA to 4 mA to its load while its output voltage varies from 0.6 to 2.3 V. Simulations of the proposed converter are performed in Cadence‐Spectre using TSMC 0.18 μm CMOS technology. Copyright © 2017 John Wiley & Sons, Ltd.

show abstract

Section: 23mentioning

confidence: 99%

“…This way, the characteristic equation in this phase usually has an over-damped response. The initial condition for (7) in Φ fall can be obtained from I 0 and V o2 as follows:…”

Section: 23mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A power efficient buck‐boost converter by reusing the coil inductor for wireless bio‐implants

Barati

Yavari

2017

Circuit Theory & Apps

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show abstract

“…Using a buck converter in the receiver side, GaN based transmitter with adaptive receiver is designed in [18]. A boost converter topology with low switching frequency is demonstrated in [19]. In [20]- [22], researchers have investigated reflected power to the transmitter side for low power inductive power transfer applications by using cascaded boost and buck, buck-boost, and integrated buck and boost converter, respectively.…”

Section: Introductionmentioning

confidence: 99%

Effect of wireless power link load resistance on the efficiency of the energy transfer

Bojarski

Asa

Czarkowski

2014

2014 IEEE International Electric Vehicle Conference (IEVC)

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With the proper impedance matching system, a high efficiency can be acquired in wireless power transfer applications. Variations of the coupling coefficient factor could deviate, however, the impedance matching system from the designed considerations. In this paper, the transmitter reflected impedance from the receiver side is analyzed to avoid divergence of the impedance matching network considering a wide air gap range between transmitter and receiver sides. A 2 kW contactless system is designed to investigate an optimum impedance requirement by testing several displacement gaps between coils. Experimental results are demonstrated to reveal a relation between the efficiency and the reflected impedance.

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Wireless power transfer using a superconducting capacitor

Zhang

Liu

et al. 2019

Physica C: Superconductivity and its Applications

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A low switching frequency AC-DC boost converter for wireless powered miniaturized implants

Cited by 7 publications

References 9 publications

A power efficient buck‐boost converter by reusing the coil inductor for wireless bio‐implants

A power efficient buck‐boost converter by reusing the coil inductor for wireless bio‐implants

Effect of wireless power link load resistance on the efficiency of the energy transfer

Wireless power transfer using a superconducting capacitor

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