Overview of Planar Magnetic Technology—Fundamental Properties

Ouyang, Ziwei; Andersen, Michael A. E.

doi:10.1109/tpel.2013.2283263

Cited by 265 publications

(108 citation statements)

References 77 publications

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“…Both are suitable for medium frequency applications ranging from 10kHz to 2MHz [1]. Moderate permeability and saturation flux density also make them to be optimal in planar transformer.…”

Section: Core Materialsmentioning

confidence: 99%

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Electromagnetic Field and Lumped Circuit Analysis of Planar Transformer at Medium Frequency for Converter Application

Lian¹

2017

Adv. sci. technol. eng. syst. j.

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“…Both are suitable for medium frequency applications ranging from 10kHz to 2MHz [1]. Moderate permeability and saturation flux density also make them to be optimal in planar transformer.…”

Section: Core Materialsmentioning

confidence: 99%

“…The increasing demand of miniaturisation of electronic devices limits the use of traditional wire-wound type of transformers [1]. DC converter is a desired technology which has relatively smaller dimension and higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Field and Lumped Circuit Analysis of Planar Transformer at Medium Frequency for Converter Application

Lian¹

2017

Adv. sci. technol. eng. syst. j.

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“…Using planar magnetic technologies is a feasible option, whose main advantages are the ease of implementation of interleaved windings and the predictability and repeatability of the process [28]. However, in order to attain a low leakage inductance, a high amount of PCB layers are needed, rapidly increasing both its cost and the winding capacitance.…”

Section: Transformer Designmentioning

confidence: 99%

“…However, in order to attain a low leakage inductance, a high amount of PCB layers are needed, rapidly increasing both its cost and the winding capacitance. Although some techniques have been presented in order to reduce parasitic capacitance in planar transformers [28] [29], for this paper a simpler, traditional transformer is designed.…”

Section: Transformer Designmentioning

confidence: 99%

Single-stage AC/DC dual inductor BCM current-fed push-pull for HB-LED lighting applications

Castro

Martin

Lamar

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-A single-stage, AC/DC driver for High Brightness Light-Emitting Diodes (HB-LED) with galvanic isolation is presented in this paper. The driver is based on a Dual Inductor Current-fed Push-Pull (DICPP) converter with each inductor operating in Boundary Conduction Mode (BCM). The interleaving between the two inductors makes possible for the converter to reduce the high input current ripple of a BCM. Moreover, it is fully compliant with IEC 1000-3-2 Class C, and it is also able to achieve high Power Factor (PF). Moreover, the low component count, simplicity and overall outstanding characteristics make this topology suitable for medium power range HB-LED drivers in low cost applications.Finally, the proposed topology has been tested on a 90W prototype for the full range of the US single-phase line voltage, feeding several strings of HB-LED, with an output voltage of 48V at full load. The prototype achieves a maximum efficiency of 92% with 0.99 power factor, 8% THD at full load and guarantees good quality light.

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“…This characteristic allows parasitics to be intelligently controlled such that they have the least effect on the performance of the transformer. Furthermore, planar nature lends to low profile and better heat dissipation qualities [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Dielectric Thickness on the Power Bandwidth of Planar Transformers

Vallabhapurapu¹,

Hofsajer²

2018

PIER C

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Abstract-This paper considers an ideal planar transformer wherein only the electromagnetic parasitics (stray capacitive and leakage inductance) arising out of the transformer geometry are taken into account, assuming lossless conditions. A suitable electrically equivalent circuit model for the planar transformer is used to analyze its frequency and power transfer characteristics; this model was validated by a three dimensional electromagnetic simulation of the planar transformer structure in FEKO electromagnetic simulation software. The effect of dielectric thickness on the bandwidth of the transformer has been analyzed based on the premise that the inherent stray capacitance and leakage inductance elements would affect the power transfer characteristics of the transformer. It has been found that the dielectric thickness of a planar transformer can be optimized so as to maximize the frequency bandwidth. It is also shown that the bandwidth is found to be sensitive to the thickness of the dielectric beyond the optimum thickness threshold t opt . Convenient closed form analytic expressions for the optimum dielectric thickness and the resultant maximum bandwidth are derived and presented. It is argued that these results can be readily used to benefit the design of air-core PCB/Planar transformers.

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Overview of Planar Magnetic Technology—Fundamental Properties

Cited by 265 publications

References 77 publications

Electromagnetic Field and Lumped Circuit Analysis of Planar Transformer at Medium Frequency for Converter Application

Electromagnetic Field and Lumped Circuit Analysis of Planar Transformer at Medium Frequency for Converter Application

Single-stage AC/DC dual inductor BCM current-fed push-pull for HB-LED lighting applications

The Influence of Dielectric Thickness on the Power Bandwidth of Planar Transformers

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