Compensation Parameters Optimization of Wireless Power Transfer for Electric Vehicles

Wu, Feng; Chu, Xiaohu; Li, Qiang; Gu, Weixing

doi:10.3390/electronics9050789

Cited by 19 publications

(13 citation statements)

References 20 publications

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“…One major research area with high interest has been the electric vehicle (EV) charging system. 1 The EV with a wired charging system gives high efficiency; however, heavy batteries, dust accumulation, long charging time, and inconvenience are the major drawbacks. 2 Furthermore, especially in the wet environment, there is a chance of electrocution with the plugs, also safety issues because of long wire.…”

Section: Introductionmentioning

confidence: 99%

“…In day‐to‐day life, transportation plays a major role in any kind of application. One major research area with high interest has been the electric vehicle (EV) charging system 1 . The EV with a wired charging system gives high efficiency; however, heavy batteries, dust accumulation, long charging time, and inconvenience are the major drawbacks 2 .…”

Section: Introductionmentioning

confidence: 99%

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Design of coil parameters for inductive type wireless power transfer system in electric vehicles

Sakthi¹,

Sundari²

2022

Intl J of Energy Research

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Summary Wireless power transmission (WPT) is becoming a more viable idea and creative solution, particularly for the battery charging of electric vehicles (EVs). Inductive power transfer (IPT) is a widely used wireless charging technology. Here, the energy transformation takes place between two coils that are magnetically coupled. WPT has recently increased the interest of researchers because it is such a secure, easy, and dependable method of recharging EVs. This article gives an idea to design the charging coils using WPT system by using resonant inductive coupling and also optimizes the coupling coefficient using rain optimization algorithm (ROA). Wireless power transfer based on inductive coupling may perhaps potentially be applied in many real‐world applications. This article uses ANSYS MAXWELL and FEMM 4.1 software tools to analyze the results for 2D and 3D coil WPT systems. From these software simulation results, it has been illustrated that the distribution of flux between Tx and Rx is analyzed for spiral and rectangular coil shapes. The selected coupling coefficient is 0.08. At 95 kHz, the inductance is 34.76 italicμH, the mutual inductance is 9.16 italicμH, and the coupling coefficient is 0.2635. Highlights Design an efficient circuit to enhance the whole performance of WPT system. Self‐inductance, mutual inductance, and coefficient of coupling parameter are analyzed. Rain optimization algorithm is designed to optimize the parameter for enhancing the efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of coil parameters for inductive type wireless power transfer system in electric vehicles

Sakthi¹,

Sundari²

2022

Intl J of Energy Research

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“…It has been employed in many applications. For example, in the field of electric vehicles, the inductive power transfer (IPT) method has a greater advantage for the electric vehicle (EV) battery charger due to its convenience and safety as compared to the plugged-in charger [2]. In the area of implantable medical devices, compared to batteries, IPT can theoretically achieve an unlimited lifetime through wireless power transfer, without the need for surgery to replace the battery, greatly reducing the patient's pain [3].…”

Section: Introductionmentioning

confidence: 99%

A Graphical Design Methodology Based on Ideal Gyrator and Transformer for Compensation Topology with Load-Independent Output in Inductive Power Transfer System

Liu

et al. 2021

Electronics

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Compensation is crucial in the inductive power transfer system to achieve load-independent constant voltage or constant current output, near-zero reactive power, higher design freedom, and zero-voltage switching of the driver circuit. This article proposes a simple, comprehensive, and innovative graphic design methodology for compensation topology to realize load-independent output at zero-phase-angle frequencies. Four types of graphical models of the loosely coupled transformer that utilize the ideal transformer and gyrator are presented. The combination of four types of models with the source-side/load-side conversion model can realize the load-independent output from the source to load. Instead of previous design methods of solving the equations derived from the circuits, the load-independent frequency, zero-phase angle (ZPA) conditions, and source-to-load voltage/current gain of the compensation topology can be intuitively obtained using the circuit model given in this paper. In addition, not limited to only research of the existing compensation topology, based on the design methodology in this paper, 12 novel compensation topologies that are free from the constraints of transformer parameters and independent of load variations are stated and verified by simulations. In addition, a novel prototype of primary-series inductor–capacitance–capacitance (S/LCC) topology is constructed to demonstrate the proposed design approach. The simulation and experimental results are consistent with the theory, indicating the correctness of the design method.

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“…Recently, research on wireless power transfer (WPT) has been focused on wireless charging of large mobile devices such as electric vehicles, automatic guided vehicles, and robots beyond wireless small devices such as mobile phones, smart watches and wearable devices [1][2][3]. Since it requires thousands of times more power than conventional small devices, high-power WPT has additional requirements for safety during charging as well as the requirements for charging efficiency [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Novel Metal Foreign Object Detection for Wireless High-Power Transfer Using a Two-Layer Balanced Coil Array with a Serial-Resonance Maxwell Bridge

Kim

Jung

Ju³

et al. 2020

Electronics

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In a wireless high-power transfer system with a distance of several tens of centimeters apart between the transmitter and receiver coils, one of the most challenging issues is to detect metallic foreign objects between the transmitter and receiver coils. The metallic foreign objects must be detected and removed since these reduce the transmission efficiency and cause heat generation of the transmitter and receiver. This paper presents two-layer symmetric balanced coil array so that if there are metallic foreign objects, it can be detected through the change of the inductance of the balanced coils. Since the balanced coil is composed of coils that are in a symmetrical relationship in position, there is no need for a reference coil, and interference between coils is reduced by dividing the coil into two layers. In addition, a novel serial-resonance Maxwell bridge circuit to improve the inductance change detection performance is presented in this paper. The proposed metallic foreign object detection system is implemented using two-layer balanced coil array with a serial-resonance Maxwell bridge and the experimental results show that voltage changes of hundreds of mV to several V occur when a metallic foreign object is inserted, so that even small metals such as clips can be detected.

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Compensation Parameters Optimization of Wireless Power Transfer for Electric Vehicles

Cited by 19 publications

References 20 publications

Design of coil parameters for inductive type wireless power transfer system in electric vehicles

Design of coil parameters for inductive type wireless power transfer system in electric vehicles

A Graphical Design Methodology Based on Ideal Gyrator and Transformer for Compensation Topology with Load-Independent Output in Inductive Power Transfer System

A Novel Metal Foreign Object Detection for Wireless High-Power Transfer Using a Two-Layer Balanced Coil Array with a Serial-Resonance Maxwell Bridge

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