Analysis and comparison of four compensation topologies of contactless power transfer system

Joy, Ezhil Reena; Kushwaha, Brijesh Kumar; Rituraj, Gautam; Kumar, Praveen

doi:10.1109/epecs.2015.7368544

Cited by 14 publications

(8 citation statements)

References 8 publications

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“…In PP compensation, the input impedance angle of the system is affected by the mutual inductance of the system, which necessitates the online adjustment of the impedance angle under different coil dislocations. In [8], the two simplest topologies are compared, and it is concluded that topology PP has the lowest efficiency. The impedance characteristics of various compensation topologies are also analyzed.…”

Section: Introductionmentioning

confidence: 99%

A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

et al. 2022

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An LCC/SP self-tuning wireless charging system is proposed herein for use in a wireless charging test bench. With different dislocations in addition to changes in the coil self-inductance and mutual inductance caused by different secondary magnetic shielding materials, the system can ensure that the high power factor of the primary side remains unchanged without changing the circuit topology. Based on this normalized detuning LCC/SP circuit model, a switch-controlled capacitor (SCC) self-tuning method based on PI control is proposed. The control scheme employs only two MOSFETs and capacitors, without WIFI communication or parameter identification. A 2 kW experimental device was set up in the laboratory, and experimental verification was carried out with large-scale dislocations and different secondary magnetic shielding materials. The experimental results confirm that the system can maintain a high power factor (>0.9) under a system mutual inductance variation of 47.7% and secondary coil self-inductance variation of 12%, and that it can be applied in electric vehicle wireless chargers or high-power wireless charger test benches.

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Section: Introductionmentioning

confidence: 99%

A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

et al. 2022

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“…Therefore, parallel compensation of transmitting coil is not good candidate for high-efficiency power transfer. 5,22 When the compensation capacitor is connected to the transmitting coil as series, high current flows through the transmitting side of the WPT system at the resonance frequency, providing the maximum power transfer to the receiver side. In Campi et al, 5 a WPT system is presented for the cardiac pacemaker and active implantable medical devices in terms of high efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…In PP and PS topology, the voltage across the parallel compensation is excessively high when the WPT system is turned on. Therefore, parallel compensation of transmitting coil is not good candidate for high‐efficiency power transfer 5,22 . When the compensation capacitor is connected to the transmitting coil as series, high current flows through the transmitting side of the WPT system at the resonance frequency, providing the maximum power transfer to the receiver side.…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency LC‐S compensated wireless power transfer charging converter for implantable pacemakers

Çetin

Demirci

2021

Circuit Theory & Apps

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This paper deals with wireless power transfer (WPT) based on magnetic coupling resonance in order to delivery power to a cardiac pacemaker from the outside of the body. The high-efficiency power delivery, implantation, and safety are key parameters for a WPT system, designed for active implantable medical devices. Therefore, this paper is focused on high-efficiency power transfer, implantation, and safety issues. For the wireless charging of the pacemaker, the LC-S compensation topology is presented and designed based on high-efficiency power delivery. The resonant components of the LC-S compensation topology were extracted in order to ensure that WPT converter operates at resonance frequency. The operation of the presented WPT charging converter is validated by a prototype operating at 300-kHz operation frequency. At 4.2 V output voltage and 0.45 A output current, the WPT efficiency of the prototype is measured as 82.39%. Finally, the safety evaluation of the proposed WPT converter is also discussed based on reference values presented in the literature.

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“…Power characteristics of power transmission systems using different combinations of compensation circuits that meet resonance conditions were clarified through impedance analysis using equivalent circuits or analysis based on circuit equations 10,11,18,19 as well as analysis using load's constant voltage/current output characteristics derived from resonance conditions. [28][29][30][31] Due to the easyto-obtain power characteristics, resonance-based design of compensation circuits is the mainstream approach in WPT systems.…”

Section: Introductionmentioning

confidence: 99%

Visual map of power transmission of magnetically coupled wireless power transfer system based on independent analysis of transmitter and receiver sides

Takeda

Koseki

2021

Electrical Engineering Japan

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A wireless power transfer (WPT) technology has recently garnered significant attention owing to its advantages of removing wire and mitigating charging concerns. In a conventional resonance-based compensation circuit design, the power transmission characteristics strongly depend on the coupling condition of the transmitter and receiver coils. Therefore, some non-resonance-based designs have been proposed. However, they are complicated and lack the resonance condition; therefore, circuit designers cannot comprehensively understand their power transmission characteristics. This study proposes a visualization method for the power transmission characteristics based on a divided analysis of WPT systems. The proposed visual map, which consists of simple circles and lines, can help in intuitively understanding the tendency of WPT and evaluate the transmission power of the compensation circuits, including the non-resonance condition. The tendency obtained from the visual map was validated via numerical simulations and experiments. The experimental results were significantly consistent with the intuitively estimated tendency and the evaluated power transmission.

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Analysis and comparison of four compensation topologies of contactless power transfer system

Cited by 14 publications

References 8 publications

A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

High‐efficiency LC‐S compensated wireless power transfer charging converter for implantable pacemakers

Visual map of power transmission of magnetically coupled wireless power transfer system based on independent analysis of transmitter and receiver sides

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