Synchronous Push–Pull Class E Rectifiers With Load-Independent Operation for Megahertz Wireless Power Transfer

Huang, Xiaosheng; Dou, Yi; Lin, Shuyi; Tian, Yuan; Ouyang, Ziwei; Andersen, Michael A. E.

doi:10.1109/tpel.2020.3038814

Cited by 32 publications

(9 citation statements)

References 30 publications

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“…The Class-E inverter has been welcomed due to its high efficiency, circuit simplicity, and small size and therefore it has been the main element of practical circuits such as biomedical implants 16,17 , inverters [18][19][20] , WPT systems [21][22][23][24][25][26] , oscillators 23,28 , and light communication transmitter 29 . Due to these broad applications, a variety of techniques have also been used to design and optimize class E inverters for different WPT applications.…”

Section: Investigation Of Temperature Variations On a Class-e Inverte...mentioning

confidence: 99%

Investigation of temperature variations on a Class-E inverter and proposing a compensation circuit to prevent harmful effects on biomedical implants

Khodadoost

Hayati

Abbasi

2023

Sci Rep

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In this paper, a Class-E inverter and a thermal compensation circuit for wireless power transmission in biomedical implants are designed, simulated, and fabricated. In the analysis of the Class-E inverter, the voltage-dependent non-linearities of Cds, Cgd, and RON as well as temperature-dependent non-linearity of RON of the transistor are considered simultaneously. Close agreement of theoretical, simulated and experimental results confirmed the validity of the proposed approach in taking into account these nonlinear effects. The paper investigated the effect of temperature variations on the characteristics of the inverter. Since both the output power and efficiency decrease with increasing temperature, a compensation circuit is proposed to keep them constant within a wide temperature range to enable its application as a reliable power source for medical implants in harsh environments. Simulations were performed and the results confirmed that the compensator enables significant improvements by maintaining the power and efficiency almost constant (8.46 ± 0.14 W and 90.4 ± 0.2%) within the temperature range of − 60 to 100 °C. Measurements performed at 25 °C and 80 °C with and without the compensation circuit were in good agreement with the theoretical and simulation results. The obtained measured output power and efficiency at 25 °C are equal to 7.42 W and 89.9%.

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Section: Investigation Of Temperature Variations On a Class-e Inverte...mentioning

confidence: 99%

Investigation of temperature variations on a Class-E inverter and proposing a compensation circuit to prevent harmful effects on biomedical implants

Khodadoost

Hayati

Abbasi

2023

Sci Rep

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“…Since the input impedance of the active rectifier maintains ZPA regardless of load variation, the induced voltage of the receiving coil has a constant phase shift from the expected driving pulses. In this example, an auxiliary coil is applied to sense the induced voltage phase of the receiving coil [19]. As in Fig.…”

Section: A Inverter and Active Rectifiermentioning

confidence: 99%

“…Liu et al [18] use an enhanced push-pull Class E inverter to power multiple re-configurable receivers of dual-band WPT systems. In [19], the active push-pull Class E rectifier achieves the load-independent operation and has zero-phase-angle input over the load range. Gu et al [20] proposes a push-pull Class Φ 2 inverter, which features very low input current ripple and the load-independent ZVS.…”

Section: Introductionmentioning

confidence: 99%

Load-Independent Push–Pull Class E$ ^2$ Topology With Coupled Inductors for MHz-WPT Applications

Huang

Dou

et al. 2022

IEEE Trans. Power Electron.

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“…Additionally, the resonant‐filter characteristic variations affect the output voltage and current. As a result, a control system needs to be added to the high‐frequency inverters and converters [10–12], which is, however, usually complicated to realise.…”

Section: Introductionmentioning

confidence: 99%

Load‐independent inverse class‐E ZVS inverter and its application to wireless power transfer systems

Komanaka

Zhu

Wei

et al. 2022

IET Power Electronics

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This paper proposes a load‐independent inverse class‐E zero‐voltage switching (ZVS) inverter. The proposed inverter achieves the constant output current and the ZVS at any load resistance without any control. The waveforms and design equations of the proposed inverter are shown. Besides, a wireless‐power‐transfer system was implemented using the proposed inverter. The designed WPT system kept the constant output voltage and the ZVS against load variations, which denoted the effectiveness of the proposed inverter and validities of the analytical equations.

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Synchronous Push–Pull Class E Rectifiers With Load-Independent Operation for Megahertz Wireless Power Transfer

Cited by 32 publications

References 30 publications

Investigation of temperature variations on a Class-E inverter and proposing a compensation circuit to prevent harmful effects on biomedical implants

Investigation of temperature variations on a Class-E inverter and proposing a compensation circuit to prevent harmful effects on biomedical implants

Load-Independent Push–Pull Class E$ ^2$ Topology With Coupled Inductors for MHz-WPT Applications

Load‐independent inverse class‐E ZVS inverter and its application to wireless power transfer systems

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