Output Characteristics of None-Series Compensated Inductive Wireless Power Transfer Link Operating at Load-Independent-Voltage-Output Frequency

2021 ◽  
pp. 102424
Author(s):  
A. Vulfovich ◽  
S. Kolesnik ◽  
D. Baimel ◽  
E. Cohen ◽  
M. Gutman ◽  
...  
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Output Frequency ◽  
Voltage Output ◽  
Output Characteristics

scholarly journals Output Voltage and Resistance Assessment of Load-Independent-Voltage-Output Frequency Operating Inductive Wireless Power Transfer Link Utilizing Input DC-Side Measurements Only

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2109
Author(s):  
Or Trachtenberg ◽  
Alon Kuperman
Keyword(s):  
Output Voltage ◽  
Low Cost ◽  
Wireless Power Transfer ◽  
Equivalent Model ◽  
Estimation Accuracy ◽  
Static System ◽  
Power Transfer ◽  
Wireless Power ◽  
Voltage Output ◽  
Conduction Mode

The paper puts forward a method for predicting output voltage and resistance of a series-series (SS) compensated inductive wireless power transfer (IWPT) link operating at load-independent-voltage-output (LIVO) frequency. The link is a part of the static system (reported by the authors in earlier works), wirelessly delivering power into an enclosed compartment without any secondary-to-primary feedback. The proposed algorithm employs input DC-side quantities (which are slow-varying and nearly noise-free, thus measured utilizing low-cost, low-bandwidth sensors) only to monitor output DC-side quantities, required for protection and/or control. It is shown that high estimation accuracy is retained as long as system parameter values are known and the phasor-domain equivalent circuit is valid (i.e., upon continuous-conduction mode (CCM) of the diode rectifier, where the proposed methodology utilizes the recently revealed modified diode rectifier equivalent model for enhanced accuracy). Under light loading (i.e., in discontinuous conduction mode (DCM)), a nonlinear correction is combined with the proposed technique to retain accuracy. The proposed methodology is well-verified by application to a 400 V to 400 V, 1 kW static IWPT link by simulations and experiments.

scholarly journals Circuit Coupling Model Containing Equivalent Eddy Current Loss Impedance for Wireless Power Transfer in Seawater

2021 ◽  
Vol 15 ◽  
pp. 410-416
Author(s):  
Wangqiang Niu ◽  
Chen Ye ◽  
Wei Gu
Keyword(s):  
Eddy Current ◽  
Wireless Power Transfer ◽  
Coupling Model ◽  
Eddy Current Loss ◽  
Outer Diameter ◽  
Water Medium ◽  
Power Transfer ◽  
Wireless Power ◽  
Current Loss ◽  
Output Characteristics

Nowadays, as the whole world put more emphasis on ocean resource exploration, the use of automatic underwater vehicles (UAVs) comes to be increasingly frequent. Inductive wireless power transfer (IWPT), as a power transfer solution with high safety and exibility, is quite promising applied in UAV power supply. However, when applied underwater, IWPT efficiency decreases due to eddy current loss (ECL) caused by high conductivity of water medium. In order to analyze IWPT output characteristics in seawater, this paper proposes a coupling circuit model involving equivalent eddy current loss impedance (EECLI), which is derived via three- coil model. On the one hand, it is found that splitting frequency still exists in IWPT under seawater. On the other hand, EECLI is independent to coil distance, but proportional to operation frequency. The validity of the proposed model for IWPT system with coils in small size (coil outer diameter 12 cm, system resonant fre- quency 570 kHz) is verified by experiment, which means it is available for IWPT system design and analysis.

scholarly journals Comparison of Various Configuration of Wireless Power Transfer System

2020 ◽  
Vol 7 (2) ◽  
pp. 32-36
Author(s):  
Martin Zavřel ◽  
Vladimír Kindl
Keyword(s):  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Font Size ◽  
Output Frequency ◽  
Frequency Converters ◽  
Mutual Comparison ◽  
Wireless Power Transfer System ◽  
Conclusion Section

<span style="font-family: 'Times New Roman',serif; font-size: 10pt; -ms-layout-grid-mode: line; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;" lang="EN-GB">This article deals with mutual comparison of different resonant tank configurations of the wireless power transfer (WPT) systems. Tested compensation configurations are classified as series-series, series-parallel, parallel-series and parallel-parallel and all of them are operated with the input and output frequency converters and other supplementary electronics. As parameter we chose the transfer distance and load. The comparison is made according to changes in overall system efficiency and power delivered to the load along varying both the load and operational distance. All theoretical findings are experimentally verified and discussed in the conclusion section.</span>

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