Analysis and Tracking of Optimal Load in Wireless Power Transfer Systems

Fu, Minyue; Yin, He; Zhu, Xinen; Ma, Chengbin

doi:10.1109/tpel.2014.2347071

Cited by 276 publications

(132 citation statements)

References 22 publications

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“…Ze is the equivalent impedance, whose real part and imaginary part are denoted as Re and Xe, respectively. The primary resonant angular frequency ω1, the secondary resonant angular frequency ω2, the primary reactance X1, and the secondary reactance X2 are defined as: Uncontrolled rectification is utilized in most WPT systems [7,9,12,24]. The analysis presented is based on full load conditions and the output filtering capacitor is supposed to be large enough to maintain a stable output DC voltage.…”

Section: Modeling Of Wireless Power Transfer (Wpt) Systemmentioning

confidence: 99%

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Analysis and Design of a Wireless Power Transfer System with Dual Active Bridges

et al. 2017

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Nowadays, work on Wireless Power Transfer (WPT) systems with dual active bridges is attracting great attention due to their low conduction losses, power regulation, load transformation and reactance compensation. However, in these studies limitations such as overall analysis, design and realization techniques of the system were not considered properly. To address the aforementioned issues, this paper presents a detailed analysis, design and realization of a Series-Series (SS) WPT system with dual active bridges, which will improve the overall performance. Three independent Phase Angles (PAs) have been analyzed and designed in this study, one PA on the primary side and the other two PAs on the secondary side. This Multiple Degrees of Phase Control (MDPC) method can achieve additional reactance compensation, load transformation and output regulation simultaneously. To realize the proposed method in practice, key implementation techniques have been investigated in detail, including additional reactance estimation, mutual inductance estimation, phase detection and synchronization. The feasibility and effectiveness of the proposed system is verified through simulation and experimental results.

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Section: Modeling Of Wireless Power Transfer (Wpt) Systemmentioning

confidence: 99%

“…Uncontrolled rectification is utilized in most WPT systems [7,9,12,24]. The analysis presented is based on full load conditions and the output filtering capacitor is supposed to be large enough to maintain a stable output DC voltage.…”

Section: Modeling Of Wireless Power Transfer (Wpt) Systemmentioning

confidence: 99%

Analysis and Design of a Wireless Power Transfer System with Dual Active Bridges

et al. 2017

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“…As a result, it is hard for the system to work in the efficiency-optimized load range all the time. Some maximum efficiency point tracking (MEPT) methods for single-receiver IPT systems have been proposed [16]. A boost converter is employed in the secondary side to control the input voltage of the rectifier to maintain high efficiency in [17].…”

Section: Introductionmentioning

confidence: 99%

A Maximum Efficiency Point Tracking Control Scheme Based on Different Cross Coupling of Dual-Receiver Inductive Power Transfer System

Liu

Yue

et al. 2017

Energies

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Abstract:One of the most promising inductive power transfer applications is the wireless power supply for locomotives which may cancel the need for pantographs. In order to meet the dynamic and high power demands of wireless power supplies for locomotives, a relatively long transmitter track and multiple receivers are usually adopted. However, during the dynamic charging, the mutual inductances between the transmitter and receivers vary and the load of the locomotives also changes randomly, which dramatically affects the system efficiency. A maximum efficiency point tracking control scheme is proposed to improve the system efficiency against the variation of the load and the mutual inductances between the transmitter and receivers while considering the cross coupling between receivers. Firstly, a detailed theoretical analysis on dual receivers is carried out. Then a control scheme with three control loops is proposed to regulate the receiver currents to be the same, to regulate the output voltage and to search for the maximum efficiency point. Finally, a 2 kW prototype is established to validate the performance of the proposed method. The overall system efficiency (DC-DC efficiency) reaches 90.6% at rated power and is improved by 5.8% with the proposed method under light load compared with the traditional constant output voltage control method.

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“…Further, it should not heat up metal objects placed on or near the charging surface [7]. Next, it is necessary to stabilize the received power over a wide range of coupling and loading variations using the open-and closed-loop power control [8][9][10]. In general, the closed-loop power control monitors power-level variations in the receiver and transmits this data to the transmitter controller via a communication link.…”

Section: Introductionmentioning

confidence: 99%

“…In [11,12], a custom application-specific integrated circuit (ASIC) was developed for wireless power transfer. In [7][8][9][10], a commercial microcontroller-based power control method was proposed. In [14,16], closed-loop power control was implemented using a commercial off-the-shelf (COTS) chipset.…”

Section: Introductionmentioning

confidence: 99%

Software-Based Wireless Power Transfer Platform for Various Power Control Experiments

et al. 2015

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Abstract:In this paper, we present the design and evaluation of a software-based wireless power transfer platform that enables the development of a prototype involving various open-and closed-loop power control functions. Our platform is based on a loosely coupled planar wireless power transfer circuit that uses a class-E power amplifier. In conjunction with this circuit, we implement flexible control functions using a National Instruments Data Acquisition (NI DAQ) board and algorithms in the MATLAB/Simulink. To verify the effectiveness of our platform, we conduct two types of power-control experiments: a no-load or metal detection using open-loop power control, and an output voltage regulation for different receiver positions using closed-loop power control. The use of the MATLAB/Simulink software as a part of the planar wireless power transfer platform for power control experiments is shown to serve as a useful and inexpensive alternative to conventional hardware-based platforms.

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Analysis and Tracking of Optimal Load in Wireless Power Transfer Systems

Cited by 276 publications

References 22 publications

Analysis and Design of a Wireless Power Transfer System with Dual Active Bridges

Analysis and Design of a Wireless Power Transfer System with Dual Active Bridges

A Maximum Efficiency Point Tracking Control Scheme Based on Different Cross Coupling of Dual-Receiver Inductive Power Transfer System

Software-Based Wireless Power Transfer Platform for Various Power Control Experiments

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