Maximum Energy Efficiency Tracking for Wireless Power Transfer Systems

Zhong, Wenxing; Hui, S. Y. Ron

doi:10.1109/tpel.2014.2351496

Cited by 396 publications

(225 citation statements)

References 23 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%

“…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. Thus, the equivalent impedance Ze is purely resistive [7,9]:…”

Section: Modeling Of Wireless Power Transfer (Wpt) Systemmentioning

confidence: 99%

“…In addition, the capacitances and the coil inductances vary due to aging. Hence, it is a challenge to select the capacitors with ideal capacitance and rated voltage [8][9][10]. When non-identical resonances In addition, current sensors have band limits, generally lower than 100 kHz.…”

Section: Introductionmentioning

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%

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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“…It has been used in many occasions without the direct electrical contact (e.g., smart phone charging, implantable device charging, and electric vehicle (EV) charging, etc.) [1][2][3][4][5][6][7][8]. In a practical WPT application, usually the windings of the primary side and secondary side are compensated to degrade the input VA rating and improve the output power capacity [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Traditionally, impedance matching method is utilized to realize the maximum power transfer tracking (MPTT) [17]. Reference [18] realizes the impedance matching by adding passive components while references [5,[19][20][21] do the impedance matching through DC/DC converters (e.g., Boost, Buck, Sepic, etc.). Since the load resistance of a practical WPT system varies with time, therefore using DC/DC converters to do the impedance matching is more suitable for the frequent load variations [19].…”

Section: Introductionmentioning

confidence: 99%

A Maximum Power Transfer Tracking Method for WPT Systems with Coupling Coefficient Identification Considering Two-Value Problem

Dai

et al. 2017

Energies

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Maximum power transfer tracking (MPTT) is meant to track the maximum power point during the system operation of wireless power transfer (WPT) systems. Traditionally, MPTT is achieved by impedance matching at the secondary side when the load resistance is varied. However, due to a loosely coupling characteristic, the variation of coupling coefficient will certainly affect the performance of impedance matching, therefore MPTT will fail accordingly. This paper presents an identification method of coupling coefficient for MPTT in WPT systems. Especially, the two-value issue during the identification is considered. The identification approach is easy to implement because it does not require additional circuit. Furthermore, MPTT is easy to realize because only two easily measured DC parameters are needed. The detailed identification procedure corresponding to the two-value issue and the maximum power transfer tracking process are presented, and both the simulation analysis and experimental results verified the identification method and MPTT.

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Topology and control strategy on transformerless wireless power station for future electric transportation systems

Lin

Zhao

2021

Int Trans Electr Energ Syst

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The power transportation industry such as electric vehicles is developing rapidly. It effectively uses green energy by reducing the use of fossil energy, and can realize alternative energy processing units, thereby bringing feasibility to future smart-grid power systems. In addition, wireless power transfer (WPT) is the main direction of the future electric power transportation charging technology. In view of this, this paper proposes a new power processing method for wireless electric transportation systems. It has the advantages of not requiring an additional input transformer and realizing bidirectional power flow. In addition, new parameter optimization methods and control strategies of the electric transportation charging system based on finite control set model predictive control method are proposed. Simulations and experimental results show that the proposed method has higher efficiency and better performance.

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Maximum Energy Efficiency Tracking for Wireless Power Transfer Systems

Cited by 396 publications

References 23 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 Power Transfer Tracking Method for WPT Systems with Coupling Coefficient Identification Considering Two-Value Problem

Topology and control strategy on transformerless wireless power station for future electric transportation systems

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