AC Power Losses Model for Planar Windings With Rectangular Cross-Sectional Conductors

Lope, Ignacio; Carretero, C.; Acero, J.; Alonso, R.; Burdío, J.M.

doi:10.1109/tpel.2013.2256928

Cited by 66 publications

(28 citation statements)

References 16 publications

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“…In that study the coils studied had the same outer diameter. The case of rectangular conductors for printed circuit board spiral inductors and isolation couplers for power electronic gate drivers are considered by Lope, Carretero, Acero, Alonso, and Burdío [8], again for a single layer winding. In this paper the modeling approach presented by Yang, Wentai, and Basham [9] is used to evaluate the bandwidth of various gauge Litz cables for application to WPT couplers.…”

Section: Electromagnetic Considerations Of the Couplermentioning

confidence: 99%

Elements of Wireless Power Transfer Essential to High Power Charging of Heavy Duty Vehicles

Miller¹,

Daga

2015

IEEE Trans. Transp. Electrific.

117

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Scaling wireless charging to power levels suitable for heavy duty passenger vehicles and mass transit bus requires in-depth assessment of WPT architectures, component sizing and stress, package size, electrical insulation requirements, parasitic loss elements, and cost minimization. It is demonstrated through an architecture comparison that the voltage rating of the power inverter semiconductors will be higher for LCC than for a more conventional S-P tuning. Higher voltage at the source inverter dc bus facilitates better utilization of the silicon, hence lower cost. Electrical and thermal stress factors of the passive components are explored, in particular the compensating capacitors and coupling coils. Experimental results are presented for a prototype, pre-commercial, 10 kW wireless charger designed for HD vehicle application. Results are in good agreement with theory and validate a design that minimizes component stress.

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Section: Electromagnetic Considerations Of the Couplermentioning

confidence: 99%

Elements of Wireless Power Transfer Essential to High Power Charging of Heavy Duty Vehicles

Miller¹,

Daga

2015

IEEE Trans. Transp. Electrific.

117

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“…For example, in domestic induction heating appliances (both conventional [22] or total active surfaces [23]), the assembly of coils and power electronics in the housing imposes severe volume restrictions which are reflected in the design of the inductors. Volume restrictions become more evident in PCB implementations of planar windings with litz-wire structure [24,25] and microfabricated inductors [26]. In other applications, the dissipated heat must be concentrated in a small area and therefore the coil should be adapted to the heating zone.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Optimization of the Efficiency of Induction Heating Applications With Litz-Wire Planar and Solenoidal Coils

Lope

Acero

Carretero

2016

IEEE Trans. Power Electron.

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Optimization of the efficiency of an induction heating application is essential in order to improve both reliability and performance. For this purpose, multi-stranded cables with litz structure are often used in induction heating applications. This paper presents an analysis and optimization of the efficiency of induction heating systems focusing on the optimal copper volume of the winding with respect to different constraints. The analysis is based on the concept of a one-strand one-turn coil, which captures the dissipative effects of an induction heating system and reduces the number of variables of the analysis. An expression for the efficiency of the induction heating system is derived. It is found that, with the geometry and the other parameters of the system fixed, efficiency depends on the copper volume of the windings. In order to use this result to optimize the efficiency of an application, volume restrictions, the packing factor and the window utilization factor are also considered. The optimum frequency for an induction heating system is also studied in this work. An experimental verification for both planar and solenoidal cases is also presented.

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“…At high frequencies, it's known that the resistance of a coil would greatly increase due to skin effect and proximity effect [23,24]. According to the model in [25], it can be expressed as:…”

Section: Figurementioning

confidence: 99%

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Shao

Líu

Fang

2016

Sci. China Technol. Sci.

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In the wireless power transfer system for freely moving biomedical implants, the receiving unit was generally inefficient for the reason that its design parameters including the receiving coil's dimension and receiving circuits' topology were always determined by experiments. In order to build the relationship between these parameters and the total transfer efficiency, this paper developed a novel efficiency model based on the impedance model of the coil and the circuit model of the receiving circuits. According to the design constraints, the optimal design parameters in the worst case were derived. The results indicate that the combination of the two-layered receiving coil and half-bridge rectifier has more advantages in size, efficiency and safety, which is preferred in the receiving unit. Additionally, when the load resistance increases, the optimal turn number of the receiving coil basically keeps constant and the corresponding transmitting current and total efficiency decrease. For 100 Ω load, the transmitting current and total efficiency in the worst case were measured to be 5.30 A and 1.45% respectively, which are much better than the published results. In general, our work provides an efficient method to determine the design parameters of the wireless power transfer system for freely moving biomedical implants.wireless power transfer system, capsule endoscope, freely moving biomedical implants, receiving coil, coil optimization, efficiency Citation: Shao Q, Liu H, Fang X L. Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants.

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AC Power Losses Model for Planar Windings With Rectangular Cross-Sectional Conductors

Cited by 66 publications

References 16 publications

Elements of Wireless Power Transfer Essential to High Power Charging of Heavy Duty Vehicles

Elements of Wireless Power Transfer Essential to High Power Charging of Heavy Duty Vehicles

Analysis and Optimization of the Efficiency of Induction Heating Applications With Litz-Wire Planar and Solenoidal Coils

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

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