A GaN-based 100 W two-stage wireless power transmitter with inherent current source output

Jiang, Laizhu; Tamjid, Farshid; Zhao, Chongwen; Costinett, Daniel; Fath, Aly; Yang, Songnan

doi:10.1109/wow.2016.7772068

Cited by 18 publications

(3 citation statements)

References 16 publications

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“…Throughout the wide load-varying range, bus voltage is maintained to be stable (640 V) as designed previously, which is lower than that of single-phase single-stage topology [41]. Compared to the single-phase single-stage and two-stage topologies for WPT [40], [41], [47], [48], the power quality of the proposed topology is also much better. In general, the proposed topology exhibits significant and dominant advantages considering the integrated performances of power quality, efficiency, count of power devices, and power capability compared with existing topologies for WPT.…”

Section: Resultsmentioning

confidence: 88%

A Three-Phase Single-Stage AC–DC Wireless-Power-Transfer Converter With Power Factor Correction and Bus Voltage Control

Liu

Chan

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Wireless power transfer technology has been a research and industrial hotspot with applications in many areas, such as wireless electric vehicle charging system which requires high power, high efficiency and high power factor. Usually, the power is drawn from 50/60 Hz single-phase or three-phase AC power source. For a high power application, a three-phase AC source is commonly used. In this paper, a three-phase single-stage wireless-power-transfer resonant converter with power factor correction and bus voltage control is proposed to improve efficiency and power quality of three-phase input, and reduce production cost and complexity for high power wireless-power-transfer system. A T-type topology is applied as the common part to perform both the power-factor-correction and DC-DC wireless-power-transfer functionalities simultaneously. The proposed converter is much more advantageous than conventional three-phase two-stage wireless-power-transfer converter with individual power factor corrector. Besides, three-phase single-stage topologies have better power quality than single-phase single-stage topologies because zero-sequence components can be naturally eliminated. Index Terms-wirelesspower transfer, three-phase, single-stage, power factor correction I. INTRODUCTION IRELESS Power Transfer (WPT) is taking up more and more roles in the industrial community. WPT technology has a variety of applications with power levels ranged from several milliwatts to tens of kilowatts, including charging portable telephone [1], supplying power for biomedical implants [2] -[4], electric vehicle (EVs) battery charging [5], [6], and roadway powering moving EVs [7], [8]. Compared to conventional wired power transmission, WPT technology is Manuscript

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Section: Resultsmentioning

confidence: 88%

A Three-Phase Single-Stage AC–DC Wireless-Power-Transfer Converter With Power Factor Correction and Bus Voltage Control

Liu

Chan

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Nowadays, the research of the high-frequency WPT using GaN devices has reported at a high operation frequency of 6.78 or 13.56 MHz. [21][22][23][24] This operation frequency is two orders of magnitude higher than that of conventional Si and SiC systems, which leads to the reduction of the size of passive components and of the total WPT systems. Also, high power GaN-WPT system of more than 4 kW has been reported at a frequency of 13.56 MHz.…”

Section: Introductionmentioning

confidence: 99%

Equivalent circuit modeling in GaN wireless power transmission including stray inductance and capacitance by measuring radiated emission

Ide

Shimizu

Takada

2022

Jpn. J. Appl. Phys.

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We establish the method for estimating the stray elements of the GaN-WPT circuit by measuring the radiated emission around the GaN switching device. By controlling the circuit supply voltage, the spectrum peak shift due to the output capacitance of the GaN-HEMT is observed. It is found that these peak shift characteristics include the influence of both the stray wire inductance and stray capacitance. By the fitting using the series resonance model, the value of the stray inductance and stray capacitance can be estimated in the non-destructive measurement in the GaN-WPT circuit.

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“…The line-cycle rectifier diodes are usually replaced by Si MOSFETs to achieve lower conduction loss and allow reverse conduction current for ZVS operation. The GaNbased CRM totem-pole PFC converter is particularly suitable for low and medium power applications such as consumer electronics [10], telecommunication equipment [11], and data centers [12].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Current Distortion for GaN-Based CRM Totem-Pole PFC Rectifier With ZVS Control

Sun

Gui

et al. 2021

IEEE Open J. Power Electron.

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The GaN-based critical conduction mode (CRM) totem-pole power factor correction (PFC) converter with fullline-cycle zero voltage switching (ZVS) is a promising candidate for high-efficiency front-end rectifiers. However, the input current can be degraded by line-cycle current distortion and ac line zerocrossing current spikes, and maintaining reliable ZVS control is difficult in noise-susceptible high-frequency environments. In this paper, a detailed analysis of the current distortion issues in a GaN-based CRM totem-pole PFC with digital ZVS control is provided, and effective approaches are proposed to mitigate different kinds of current distortion and ensure stable ZVS control under high-frequency operation. The proposed solutions have the advantages of straightforward implementation and do not increase the control complexity. The current distortion issues are demonstrated in two GaN-based CRM totem-pole PFC prototypes, a 1.5 kW PFC for data centers and a 100 W PFC in a 6.78 MHz wireless charging power supply for consumer electronics. The proposed methods are experimentally verified with effective mitigation of the current distortion and improvement of the converter power efficiency.

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A GaN-based 100 W two-stage wireless power transmitter with inherent current source output

Cited by 18 publications

References 16 publications

A Three-Phase Single-Stage AC–DC Wireless-Power-Transfer Converter With Power Factor Correction and Bus Voltage Control

A Three-Phase Single-Stage AC–DC Wireless-Power-Transfer Converter With Power Factor Correction and Bus Voltage Control

Equivalent circuit modeling in GaN wireless power transmission including stray inductance and capacitance by measuring radiated emission

Mitigation of Current Distortion for GaN-Based CRM Totem-Pole PFC Rectifier With ZVS Control

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