Output voltage control of inductive power transfer system based on extremum seeking control

Yuan, Xiaofang; Zhang, Yunling; Wang, Yan; Li, Zhongqi

doi:10.1049/iet-pel.2014.0532

Cited by 8 publications

(13 citation statements)

References 25 publications

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“…The presence of LCL resonant tank after the voltage-fed inverter facilitates soft-switching during turn-on of inverter switches [22,23]. The circuit parameters for LCL topology are taken from [21] and a slight modification of TC-to-RC turn ratio is done from 1: 0.88 to 1: 0.7 to meet the same load requirement. Table 2 lists estimated loss of each component for both proposed topology and voltage-fed LCL topology for 1 kW load power.…”

Section: Simulation Resultsmentioning

confidence: 99%

Wireless power transfer technology using full‐bridge current‐fed topology for medium power applications

Samanta

Rathore

2016

IET Power Electronics

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This paper studies, explores and analyses a wireless power transfer (WPT) system using current-fed power electronics topology for electric vehicles and battery charging applications. The main contribution is analysis, design, and implementation of a current-fed technology for WPT application. The required resonance in both the transmitter and receiver coils is parallel (L)(C) and series (LC) type, respectively. A detailed mathematical analysis and design have been reported. Stiff DC current at the input of the inverter limits the inverter switch current stress. Also, the inductor in DClink provides natural short-circuit protection during inverter fault. It is quite important in such application. Resonant converter facilitates soft-switching at turn-off of the transmitter side switches. Also, soft-commutation of rectifier diodes reduces reverse recovery loss. Mathematical analysis is verified by simulation results using PSIM 9.3. A 420 W proofof-concept lab hardware prototype is developed and the experimental results are demonstrated to validate the mathematical analysis and simulation results. The maximum efficiency of DC-DC WPT stage obtained from the proofof-concept lab-prototype is close to 90% with a coefficient of coupling 18%. It is suitable for solar-to-vehicle and singlephase residential slow charging.

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Section: Simulation Resultsmentioning

confidence: 99%

Wireless power transfer technology using full‐bridge current‐fed topology for medium power applications

Samanta

Rathore

2016

IET Power Electronics

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“…Due to the reasonable electrical isolation between charging coil (paved in the road) and pick-up coil (embedded in the car chassis), the IPT system has the capability to operate in grimy conditions [5]. The IPT system is viable because of its inherent advantages of safety, cleanliness and its operation in the dirt, underwater, and harsh weather conditions [3,6]. For wireless charging of EVs, it is necessary to have a reasonable ground clearance of a few hundred millimeters between the road and the EV chassis, and the ground clearance is also known as the air gap between the charging coil and the pick-up coil [7].…”

Section: Introductionmentioning

confidence: 99%

Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging

et al. 2016

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Abstract:The inductive power transfer (IPT) system for electric vehicle (EV) charging has acquired more research interest in its different facets. However, the misalignment tolerance between the charging coil (installed in the ground) and pick-up coil (mounted on the car chassis), has been a challenge and fundamental interest in the future market of EVs. This paper proposes a new coil design QDQ (Quad D Quadrature) that maintains the high coupling coefficient and efficient power transfer during reasonable misalignment. The QDQ design makes the use of four adjacent circular coils and one square coil, for both charging and pick-up side, to capture the maximum flux at any position. The coil design has been modeled in JMAG software for calculation of inductive parameters using the finite element method (FEM), and its hardware has been tested experimentally at various misaligned positions. The QDQ coils are shown to be capable of achieving good coupling coefficient and high efficiency of the system until the misalignment displacement reaches 50% of the employed coil size.

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“…The inductance of a ferrite-core inductor (L FC ) can be computed by (18). A L-FC is the inductance coefficient and it is generally regarded as a constant.…”

Section: Esr Of a Ferrite-core Inductormentioning

confidence: 99%

“…The six-order system was subsequently simplified into a two-order underdamped system, based on which a proportion integration controller was designed and modified. Yuan et al [18] proposed an extremum seeking control based on mutative-scale parallel chaos optimisation algorithm for an LCL/P (primary LCL and secondary parallel) compensated WPT system in order to obtain steady output voltage regardless of load and coupling variations.…”

Section: Introductionmentioning

confidence: 99%

Efficiency‐based design optimisation of a double‐sided LCL compensated wireless power transfer system

Yao

Wang

Álvarez

et al. 2019

IET Power Electronics

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The double-sided inductor-capacitor-inductor (DS-LCL) compensation topology has been extensively employed in wireless power transfer (WPT) systems owing to its advantages including zero voltage switching operation, constant current output, and no reactive power exchange between the primary and secondary sides. However, in most cases, equality of the primary and secondary coupling inductances is not optimal from the perspective of power transfer efficiency (PTE). This study presents an efficiency-based design optimisation method for DS-LCL compensated WPT system to obtain the highest PTE. The loss sources, as well as their impact on the PTE, are analysed. The analytical equivalent series resistance models of the efficiency-related loss sources are built and validated by practical measurements. The optimisation procedures are given as well. Two 1 A/200 W WPT prototypes are fabricated, tested, and compared, where one of them is designed in terms of the proposed optimisation method, whereas the other is designed in a conventional manner. The power loss on coupling coils of the optimised system is 7.49 W, 21.5% lower than that of the conventional system (9.54 W). The system overall efficiency is increased from 91.65% to 92.67% by utilising the proposed optimisation method.

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Output voltage control of inductive power transfer system based on extremum seeking control

Cited by 8 publications

References 25 publications

Wireless power transfer technology using full‐bridge current‐fed topology for medium power applications

Wireless power transfer technology using full‐bridge current‐fed topology for medium power applications

Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging

Efficiency‐based design optimisation of a double‐sided LCL compensated wireless power transfer system

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