Analysis and Transmitter Currents Decomposition Based Control for Multiple Overlapped Transmitters Based WPT Systems Considering Cross Couplings

Li, Yong; Mai, Ruikun; Liwen, Lu; Lin, Tianren; Liu, Yeran; He, Zhengyou

doi:10.1109/tpel.2017.2690061

Cited by 66 publications

(20 citation statements)

References 35 publications

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“…The DC output voltage and power are presented in (25) and (26) adopting which is equivalent battery's impedance. It needs to emphasize that if switching frequency and secondary side capacitor 2 are assumed to be constant, then each load output power depends only on the multiplication .…”

Section: Illustrative Design Example Of Three-phase Wdc Systemmentioning

confidence: 99%

See 1 more Smart Citation

A High-Power Multiphase Wireless Dynamic Charging System With Low Output Power Pulsation for Electric Vehicles

Dahidah

Pickert

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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Wireless Dynamic Charging (WDC) of Electric Vehicles (EV) is a new initiative aimed to increase EV uptake. However, pulsating output power along the driving direction is a major problem with this technology. Moreover, in order to deliver enough driving power for EVs, WDC systems must operate at high power. This paper proposes a WDC system that has the capability of providing a low pulsating and high output power to EVs. The proposed WDC utilizes multiple primary windings that guarantees a homogeneous mutual magnetic flux for the receiver along the driving direction. This results in a constant induced voltage across the receiver and hence constant output power to charge the EV battery. High output power is realized by using multiple transmitter windings which have been arranged in a novel winding method. The structure layout of the proposed WDC, including ferrite cores, windings and resonant tanks is presented. Furthermore, a theoretical analysis is conducted to determine conditions of each winding's current phase and amplitude for achieving constant output power. The crossing mutual inductances between the different transmitter's phases are compensated by adding small capacitors in series with each transmitter winding. An optimization analysis using Maxwell 3D simulation for both, transmitter and receiver is carried out to achieve the highest coupling factor by using minimum ferrite material. The effectiveness of the proposed system is analytically demonstrated and experimentally verified using a 3-kW laboratory prototype. Finally, the performance of the proposed method is compared with similar systems presented in the literature. The comparison shows that the proposed system has the advantages of using simple control, it also eliminates communications between the primary and secondary side and delivers a normalized power of 2.25 which is 125% higher compared to conventional single-phase systems.

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Section: Illustrative Design Example Of Three-phase Wdc Systemmentioning

confidence: 99%

“…In these applications, single-phase system may not be able to produce such a requirement. Therefore, multi-phase systems are seen as a solution to transfer higher output power [24][25].…”

Section: Introductionmentioning

confidence: 99%

A High-Power Multiphase Wireless Dynamic Charging System With Low Output Power Pulsation for Electric Vehicles

Dahidah

Pickert

et al. 2020

IEEE J. Emerg. Sel. Topics Power Electron.

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“…Therefore, MEU technology has been increasingly utilized in a range of applications in recent years such as drone charging, power supply of multiple mobile electronic devices, and electric vehicle charging [1]- [5]. The main advantages of this method include: 1) large power transfer capacity; 2) high misalignment tolerance; 3) flexible power output; 4) high system efficiency (under some condition [15]); 5) low voltage and current stress on a single excitation unit [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Control for Multi-Excitation Units WPT System With Multiple Coupling Parameter Identification and Area Adaptation

Dai

Jiang

et al. 2020

IEEE Access

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In a multiple excitation unit wireless power transfer system, power control flexibility is a critical feature. To develop a system with environmental sensing capability and a smart power distribution strategy, a cooperative control method is proposed for the excitation units. A multiple coupling coefficient identification method was developed by utilizing the DC information of each excitation unit. Furthermore, a bi-operation mode with adaptive area division is proposed to achieve maximum efficiency in the optimum coupling area and to satisfy the fundamental power requirement for a weak coupling area. In the identification and control implementation process, this method is easy to implement and the response speed can be guaranteed because only the DC input current and the duty cycle of the DC regulator information are required. In addition, the proposed approach was evaluated based on experimental analysis.

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“…Unlike traditional power transmission, which is wire-based, WPT technology is not constrained by cables, does not produce electrical sparks, and has high mobility. Due to these advantages, it has become a hot research topic in the field of energy transfer [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

Tan

Zhang

Wang³

et al. 2019

Energies

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As is common in multi-load wireless power transfer (WPT) systems based on series–series compensation topology, the power received by loads and the efficiency of the process are highly sensitive to changes in the number of loads. To guarantee that the power supplied to a load remains stable when other loads access or leave the system, we propose an improved multi-load system for WPT. The new system uses an LCC/S topology (based on inductor–capacitor–inductor or LCL topology) to keep the power received by the loads stable. By comparing two scenarios (ideal and real models based on LCC/S topology), we aim to eliminate cross-coupling between receiving coils by connecting compensating capacitors in series on the receiving side. In this way, the stability of the power received by loads is further improved. Moreover, a method of optimizing control over the efficiency is proposed based on the effect on the overall efficiency of impedance and number of loads. This allows us to optimize the overall efficiency of the system. Finally, a system to verify our theoretical analysis is established and used to show the validity and effectiveness of the proposed system.

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Analysis and Transmitter Currents Decomposition Based Control for Multiple Overlapped Transmitters Based WPT Systems Considering Cross Couplings

Cited by 66 publications

References 35 publications

A High-Power Multiphase Wireless Dynamic Charging System With Low Output Power Pulsation for Electric Vehicles

A High-Power Multiphase Wireless Dynamic Charging System With Low Output Power Pulsation for Electric Vehicles

Cooperative Control for Multi-Excitation Units WPT System With Multiple Coupling Parameter Identification and Area Adaptation

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

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