Optimization and design sensitivity of SISO and MISO wireless power transfer systems

Lang, Hans-Dieter; Ludwig, Alon; Sarris, Costas D.

doi:10.1109/aps.2015.7304589

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…As mentioned in the introduction of Sec. IV, previous studies [22] revealed that achieving the maximum possible PTE is generally very sensitive (particularly for such singleturn loop-based MISO setups) to the receiver capacitance values; commonly tolerances much lower than one percent are obtained, to maintain a performance within 1 % of the optimum PTE. On the other hand, the sensitivity on the load resistance R L is much smaller; often tolerances of 10% and higher are obtained for the same permissible decrease in performance.…”

Section: Optimizing the Receiver Load R Lmentioning

confidence: 99%

“…Adding the transmitter power constraints (22), the program (12) in terms of complex currents i becomes:…”

Section: B Nonconvex Transmit Power Constraintsmentioning

confidence: 99%

“…R L could be optimized numerically in an outer loop (while optimizing the system for each R L in the inner loop); as the optimal PTE is a concave function in R L . However, it has been observed that the maximum PTE is usually not sensitive to the load resistance R L , but strongly depends on x r ≈ x r [22]. Thus, even using the closed-form expression (18), results that are very close to the absolute optimum can be expected, as long as x r is optimized.…”

Section: Optimizing the Receiver Load R Lmentioning

confidence: 99%

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Semidefinite Relaxation-Based Optimization of Multiple-Input Wireless Power Transfer Systems

Lang

Sarris

2017

IEEE Trans. Microwave Theory Techn.

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An optimization procedure for multi-transmitter (MISO) wireless power transfer (WPT) systems based on tight semidefinite relaxation (SDR) is presented. This method ensures physical realizability of MISO WPT systems designed via convex optimization -a robust, semi-analytical and intuitive route to optimizing such systems. To that end, the nonconvex constraints requiring that power is fed into rather than drawn from the system via all transmitter ports are incorporated in a convex semidefinite relaxation, which is efficiently and reliably solvable by dedicated algorithms. A test of the solution then confirms that this modified problem is equivalent (tight relaxation) to the original (nonconvex) one and that the true global optimum has been found. This is a clear advantage over global optimization methods (e.g. genetic algorithms), where convergence to the true global optimum cannot be ensured or tested. Discussions of numerical results yielded by both the closed-form expressions and the refined technique illustrate the importance and practicability of the new method. It, is shown that this technique offers a rigorous optimization framework for a broad range of current and emerging WPT applications.

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Section: Optimizing the Receiver Load R Lmentioning

confidence: 99%

“…Adding the transmitter power constraints (22), the program (12) in terms of complex currents i becomes:…”

Section: B Nonconvex Transmit Power Constraintsmentioning

confidence: 99%

Section: Optimizing the Receiver Load R Lmentioning

confidence: 99%

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Semidefinite Relaxation-Based Optimization of Multiple-Input Wireless Power Transfer Systems

Lang

Sarris

2017

IEEE Trans. Microwave Theory Techn.

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“…Lang et al [2] present a comparison between the MISO and SISO. The multi-TX WPT systems have several advantages over their single-TX counterparts, most importantly higher power transfer efficiency (PTE).…”

Section: Siso and Simo Prototypementioning

confidence: 99%

Survey on magnetic resonant coupling wireless power transfer technology for electric vehicle charging

Mou

Gladwin

Zhao

et al. 2019

IET Power Electronics

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2019) 'Survey on magnetic resonant coupling wireless power transfer technology for electric vehicle charging. ', IET power electronics.,12 (12). pp. 3005-3020.The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.Abstract: Wireless Power Transfer technology (WPT) makes it possible to supply power through an air-gap, without the need for current-carrying wires. One important technique of WPT technology is magnetic resonant coupling (MRC) WPT. Based on the advantages of MRC WPT, such as safety and high power transfer efficiency over a long transmit distance, there are many possible applications of MRC WPT. This paper provides a comprehensive, state-of-the-art review of the MRC WPT technology and wireless charging for electric vehicle (EV). A comparative overview of MRC WPT system design which includes a detailed description of the prototypes, schematics, compensation circuit topologies (impedance matching), and international charging standards. In addition, this paper provides an overview of wireless EV charging including the static wireless EV charging and the dynamic wireless EV charging, which focuses on the coil design, power transfer efficiency, and current research achievement in literature.

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“…For example, earlier studies have attempted to establish the theoretical limits of near‐field conversion efficiency by solving the associated convex programming problems . In addition, such maximum achievable efficiency of near‐field WPT has also been analyzed by using two‐port parameters and deriving a closed‐form analytic solution for the optimal load or performing numerical search for the optimal load under the transmitter‐diversity scheme . However, no clear direction has emerged to determine the performance limits of far‐field rectennas, and only a few recent efforts have addressed the optimal rectenna structure that has maximized conversion efficiency for low‐power WPT …”

Section: Introductionmentioning

confidence: 99%

Theoretical limits of rectifying efficiency for low-power wireless power transfer

Chen

Chiu

2017

Int J RF Microw Comput Aided Eng

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The theoretical limits of power conversion efficiency for near‐field wireless power transfer were derived in recent years, but the maximum achievable efficiency for low‐power and far‐field powering has not yet been characterized. In this paper, we derive the performance limits of rectifiers using diodes for input power ranging from −20 dBm to 0 dBm. These theoretical limits are verified via measurement and simulation, and experimental performance data from the literature are extracted to validate the established maximum efficiency. Moreover, we propose design guidelines to achieve such performance limits, clarifying the method for optimizing the rectifier circuitry and the associated parameters. We further show potential approaches for the enhancement of maximum conversion efficiency via analyzing the loss parameters of Schottky diodes. This work thus establishes the performance benchmark of low‐power rectifiers and provides useful guidelines for future rectenna development.

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Optimization and design sensitivity of SISO and MISO wireless power transfer systems

Cited by 11 publications

References 3 publications

Semidefinite Relaxation-Based Optimization of Multiple-Input Wireless Power Transfer Systems

Semidefinite Relaxation-Based Optimization of Multiple-Input Wireless Power Transfer Systems

Survey on magnetic resonant coupling wireless power transfer technology for electric vehicle charging

Theoretical limits of rectifying efficiency for low-power wireless power transfer

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