Influence of the winding strategy in toroidal transformers

Prieto, R.; Bataller, V.; Cobos, J.A.; Uceda, J.

doi:10.1109/iecon.1998.724150

Cited by 16 publications

(3 citation statements)

References 6 publications

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“…The peak AC flux density excursion was calculated to be 77 mT. Stranded wire was used for N to mitigate skin-effect losses and the two windings were evenly distributed around the core to minimize leakage inductances [13]. An SMPS was not commissioned here and, instead, the energy recovered from Ls is dissipated in a 40-Ω dump resistor for experimental purposes.…”

Section: Proposed Arrangementmentioning

confidence: 99%

High efficiency bidirectional 5kW DC-DC converter with super-junction MOSFETs for electric vehicle super-capacitor systems

Hopkins

McNeill

Anthony

et al. 2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper presents a high efficiency 5-kW bidirectional DC-DC converter for use in electric vehicle super-capacitor systems. Super-junction MOSFETs are deployed in the power stage to minimize losses. This is achieved using a snubber inductor and by arranging the gate signal underlap delays in order to control charging current caused by the devices' highly non-linear output capacitance and to deactivate the intrinsic body drain diode respectively. The result is a 5-kW power converter with an estimated efficiency exceeding 99% in the power semiconductor stage and requiring no forced cooling. I.

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Section: Proposed Arrangementmentioning

confidence: 99%

High efficiency bidirectional 5kW DC-DC converter with super-junction MOSFETs for electric vehicle super-capacitor systems

Hopkins

McNeill

Anthony

et al. 2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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show abstract

“…The peak AC flux density excursion in the inductor core was calculated to be 45 mT. Multi-stranded Litz wire was used for the main winding to mitigate skin-effect losses and the reset winding was interleaved with the main winding to minimize leakage inductances [23]. For simplicity and ease of measurement the energy recovered through the reset winding was initially dissipated in a fixed resistor, 1.…”

Section: Power Circuitry and Predicted Resultsmentioning

confidence: 99%

Achieving Efficiencies Exceeding 99% in a Super-Junction 5-kW DC–DC Converter Power Stage Through the Use of an Energy Recovery Snubber and Dead-Time Optimization

Hopkins

Proynov

McNeill

et al. 2018

IEEE Trans. Power Electron.

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A highly efficient 5-kW bidirectional DC-DC converter power stage operating from a 400-V supply implementing Super-Junction (SJ) MOSFETs is presented. SJ MOSFETs have low on-state resistances and low switching losses. However, their application in voltage-source converters can be compromised by the reverse recovery behavior of their intrinsic diodes and their highly non-linear output capacitances. A series switching-aid circuit is used to control the output capacitance charging current. The dead times between switching transitions are assessed and optimized in order to deactivate the intrinsic diodes. The combination of these techniques enables very high efficiencies to be attained. Calorimetric measurements indicate a full-load efficiency of 99.1% for the prototype 5-kW DC-DC converter power stage. A loss reduction of approximately 50% is achieved with the prototype converter power stage when compared to an equivalent IGBT based power stage. Lastly, a loss vs. duty cycle function is experimentally determined which can be used to inform the design of a maximum efficiency point tracking system.

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“…This file was used to generate the toroidal solenoid layout. The layout is displayed in ASITIC as shown in An interleaved winding approach is cited to have better coupling between primary and secondary [50]. The winding method is chosen to be the interleaving of primary and secondary windings together around a dielectric core.…”

Section: Geometrical Model Of the Toroidal Solenoidmentioning

confidence: 99%

Design of high frequency circuits for a gigabit per second data transmission system with isolation transformers and improved electrostatic protection

Badr

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Influence of the winding strategy in toroidal transformers

Cited by 16 publications

References 6 publications

High efficiency bidirectional 5kW DC-DC converter with super-junction MOSFETs for electric vehicle super-capacitor systems

High efficiency bidirectional 5kW DC-DC converter with super-junction MOSFETs for electric vehicle super-capacitor systems

Achieving Efficiencies Exceeding 99% in a Super-Junction 5-kW DC–DC Converter Power Stage Through the Use of an Energy Recovery Snubber and Dead-Time Optimization

Design of high frequency circuits for a gigabit per second data transmission system with isolation transformers and improved electrostatic protection

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