Single-Stage Wireless-Power-Transfer Resonant Converter With Boost Bridgeless Power-Factor-Correction Rectifier

Liu, Junwei; Chan, Kalok; Chung, C. Y.; Chan, Nelson Hon Lung; Liu, Ming; Xu, Wenzheng

doi:10.1109/tie.2017.2745471

Cited by 72 publications

(30 citation statements)

References 41 publications

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“…The input impedance (Zin) can be calculated in (7), which can be separated into real and imaginary parts. By setting the imaginary part from (7) to zero, the ZPA frequencies can be derived as…”

Section: Principle Of Pp Compensationmentioning

confidence: 99%

“…Under bifurcated condition, the conditions in (9) and (10) are met. By setting the discriminant of the input reactance (Im{Zin}) in (7) to zero, the critical coupling kcri is obtained by solving for k12 which can be given as, 3…”

Section: Principle Of Pp Compensationmentioning

confidence: 99%

“…The asymmetrical voltage cancellation (AVC) [4] and symmetrical voltage cancellation (SVC) [5], [6] can be used in full-bridge topologies. The single-stage boost bridgeless converter offering power factor correction (PFC) for high power, high efficiency, and high power factor is reported in [7].…”

Section: Introductionmentioning

confidence: 99%

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Secondary-Side Voltage Control via Primary-Side Controller for Wireless EV Chargers

2020

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In inductive power transfer (IPT) system, the magnetic coupling has significant effects on power and system efficiency. The voltage and current on the secondary side are coupling dependent. Load measurements are not possible through sensors on the primary side. This paper proposes the secondary-side voltage controller based on the primary-side control by means of bifurcation approach. The main advantage of operation under bifurcation is that the coupling and load on the secondary have no effect on the voltage gain. This enables the secondary voltage control through the primary voltage. With the proposed sensing coil on the primary side, the bifurcation detection is possible. The proposed control can utilize the frequency split phenomenon and track the bifurcation frequency to ensure maximum efficiency in various coupling conditions. In addition, the design guidelines of the parallel-parallel compensation configuration are introduced for a desired load profile and transfer distance. The constant voltage gain with respect to conditions of magnetic coupling variation is verified by using finite element analysis and experimental study. A 1-kW IPT prototype is constructed to validate the proposed bifurcation detection and voltage control. Experimental results show that the proposed IPT can achieve up to 90% of maximum efficiency while maintaining constant secondary voltage. INDEX TERMS Bifurcation, Inductive power transfer, Sensing coil.

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Section: Principle Of Pp Compensationmentioning

confidence: 99%

Section: Principle Of Pp Compensationmentioning

confidence: 99%

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Secondary-Side Voltage Control via Primary-Side Controller for Wireless EV Chargers

2020

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“…Moreover, the prototyping of these systems is a time-consuming process that presents huge costs in terms of materials and manufacturing. This is why several works in the literature are based on small-size prototypes that can be easily constructed and rearranged [15][16][17]. Nevertheless, the applicability to real-size systems has not yet widely discussed and the relationships between the down-scaled prototypes and possible large-scale systems have not been analyzed.…”

Section: Introductionmentioning

confidence: 99%

Scaling Rules at Constant Frequency for Resonant Inductive Power Transfer Systems for Electric Vehicles

2018

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Abstract:The paper proposes the development of a set of rules for the resizing of inductive power transfer systems with particular attention to the ones dedicated to the charge of electric vehicles. These rules aim at the construction of down-scaled prototypes allowing the study and the design with benefits in terms of costs, time consumption and flexibility. The theoretical results are experimentally validated by comparing a 1.1 kW system with its down-scaled version.

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“…Alternatively to the strategies found in the literature, this paper explores the applicability of well known power converter stages, i.e. [21][22][23][24][25], loss-free resistor (LFR) emulators for the mitigation of ferroresonances in MV VTs (Fig. 1f).…”

Section: Introductionmentioning

confidence: 99%

Electronic resistor emulators for ferroresonance damping in MV transformers

Bayona

Azcondo

Brañas

et al. 2018

IET Renewable Power Generation

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The occurrence of ferroresonances, due to the presence of voltage transformers in isolated-neutral in mediumvoltage (MV) distribution grids, results in overvoltages and overcurrents that may damage the connected equipment. To prevent this phenomenon, the protection windings of the MV transformers have to be properly loaded for damping purposes. Mitigation equipment based on resistors, passive/active circuits and static converters have been proposed in the literature. This study proposes a new variety of mitigation equipment based on very simple power electronic converters operated as configurable resistor emulators. The proposed approach is evaluated theoretically and validated experimentally. A resistor emulator proof of concept is designed and applied for damping ferroresonances due to the occurrence of line-to-ground faults in isolated-neutral MV distribution power systems.

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Single-Stage Wireless-Power-Transfer Resonant Converter With Boost Bridgeless Power-Factor-Correction Rectifier

Cited by 72 publications

References 41 publications

Secondary-Side Voltage Control via Primary-Side Controller for Wireless EV Chargers

Secondary-Side Voltage Control via Primary-Side Controller for Wireless EV Chargers

Scaling Rules at Constant Frequency for Resonant Inductive Power Transfer Systems for Electric Vehicles

Electronic resistor emulators for ferroresonance damping in MV transformers

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