Inductors biased with permanent magnets

Ludwig, J. T.

doi:10.1109/ee.1961.6433284

Cited by 4 publications

(6 citation statements)

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“…Its value ranges from 0 to 1, where 1 means a perfect coupling. The coupling coefficient is defined as [5]: (1) where M is the mutual inductance of the coupled coils and M = M 21 = M 12 .…”

Section: Inductor Design Based On the Frequency-domain Simulation Resmentioning

confidence: 99%

“…Coil arrangements for the flux cancellation by the mutual coupling Fig.9. Two magnetically coupled coils driven on both sides by the ac current sources i 1 The finite element model of inductors wound in a common core is coupled with the circuit model of the inverter (represented as the voltage source E 1 ), other filter elements (capacitors C 1 , C 2 ) and the load (R LOAD ). Coils themselves have been modelled using the MTCD like in the former model but in this case the variable current results from the electrical circuit.…”

Section: Numerical Modelling Of the Lclc Filtermentioning

confidence: 99%

“…The so far known solution in literature consists in using a permanent magnet (PM) for the reversed DC-bias flux [1], [2], [3], which, however, only partially solves the problem (Fig. 2c).…”

Section: Introductionmentioning

confidence: 99%

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The Numerical Simulation Study of the DC Compensated Choke for the DC/DC Buck Converter

Ruszczyk¹

2015

ELECTROTECHNICAL REVIEW

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The paper presents the structure of an output filter used for a DC/DC buck converter. The problem with an output filter in the DC/DC converters is that the L inductor works with a high DC bias current for standard solutions and thus causes a significant increase in the core crosssection and a total weight of the choke. The proposed solution bases on a choke structure with split coils that creates opposed fluxes in the core and, as a result, cancels their DC component. This, in turn, allows to build a choke with a better utilized and lighter core. The proposed solution of the DC compensated choke is shown in the circuit simulation of the DC/DC buck converter and FEM simulations of the choke model. All results have been confirmed in laboratory experiments. Streszczenie. Artykuł przedstawia strukturę filtra wyjściowego użytego w przekształtniku DC/DC obniżającym napięcie typu "buck converter". Głównym problemem występującym w filtrach dla przekształtników DC/DC jest to, że w typowych rozwiązaniach indukcyjność L pracuje z dużym prądem podmagnesowania DC. Jest to bezpośrednim powodem znacznego zwiększenia przekroju poprzecznego rdzenia i całkowitej wagi dławika L. Zaproponowane rozwiązanie bazuje na strukturze dławika z rozdzielonym uzwojeniem, które tworzy w rdzeniu strumienie przeciwne, a w rezultacie powoduje wzajemne kasowanie ich składowych stałych DC. To, z kolei, pozwala na stworzenie dławika, który posiada lżejszy, lepiej wykorzystany rdzeń magnetyczny. Działanie zaproponowanego dławika ze skompensowaną składową stałą DC jest przedstawione w symulacjach obwodowych przekształtnika DC/DC obniżającego napięcie typu "buck converter" oraz symulacjach polowych FEM modelu dławika L. Wyniki symulacji zostały potwierdzone badaniami laboratoryjnymi. Badania symulacyjne dławika ze skompensowaną składową DC do przekształtnika DC/DC typu buck converter.

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“…Its value ranges from 0 to 1, where 1 means a perfect coupling. The coupling coefficient is defined as [5]: (1) where M is the mutual inductance of the coupled coils and M = M 21 = M 12 .…”

Section: Inductor Design Based On the Frequency-domain Simulation Resmentioning

confidence: 99%

Section: Numerical Modelling Of the Lclc Filtermentioning

confidence: 99%

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The Numerical Simulation Study of the DC Compensated Choke for the DC/DC Buck Converter

Ruszczyk¹

2015

ELECTROTECHNICAL REVIEW

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“…The first designs of magnetic biased inductors consisted of standard gaped inductors with a permanent magnet inserted in the air-gap [1]- [4][6]- [8]. Fig.…”

Section: Basic Configuration: Magnet Inside the Air-gapmentioning

confidence: 99%

Design, analysis and simulation of magnetic biased inductors with saturation-gap

Aguilar

Munk‐Nielsen

2014

2014 16th European Conference on Power Electronics and Applications

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Permanent magnet biasing, is a known technique for increasing the energy storage capability of inductors operating in DC applications. The opposing flux introduced by a permanent magnet will extend the saturation flux limit of a given magnetic material. When full biasing of the core is achieved, the effective saturation current limit of a given inductor is doubled. This results in a smaller requirement in number of turns and area cross-section, allowing for smaller and/or more efficient inductors. By adding some switching elements, the benefits of biased inductors can also be used in AC applications. This paper presents a review of the scientific literature on biased hybrid inductors and the evolution of the used magnets and cores configurations. A recently developed biasing configuration, the saturation-gap, will also be analyzed and the design parameter will be identified using finite element software. The simulation results will be compared with empirical laboratory measurements on physical units.

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“…The first scientific publications on the subject [11]- [14], date back to the late 50's and present a theoretical analysis and an optimization procedure for the first PMBIs topology. This first PMBI topology consist of standard gapped cores with a PM inside the airgap as depicted in Fig.…”

Section: Topologies With Pm Inside the Airgapmentioning

confidence: 99%

Permanent Magnet Biased Inductors: And Additional investigations on: Biasing topologies for AC applications, Parametric transformers using permanent magnets, and Optimization of conduction losses on planar transformer windings

Aguilar

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Inductors biased with permanent magnets

Cited by 4 publications

References 0 publications

The Numerical Simulation Study of the DC Compensated Choke for the DC/DC Buck Converter

The Numerical Simulation Study of the DC Compensated Choke for the DC/DC Buck Converter

Design, analysis and simulation of magnetic biased inductors with saturation-gap

Permanent Magnet Biased Inductors: And Additional investigations on: Biasing topologies for AC applications, Parametric transformers using permanent magnets, and Optimization of conduction losses on planar transformer windings

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