Nanocrystalline magnetic materials versus ferrites in power electronics

Nikolov, Georgi; Valchev, Vencislav Cekov

doi:10.1016/j.proeps.2009.09.209

Cited by 43 publications

(16 citation statements)

References 3 publications

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“…This can lead to complex and difficult designs and inconsistent performance. Additionally, the saturation point of nanocrystalline-based materials is more than twice that of ferrite, which further supports the use of nanocrystalline powder cores in DC line reactors [27]. For the purpose of demonstrating the CI-CCS concept whilst maintaining the flexibility to adjust coupling factors, different coupling factors can be realized by connecting tightly coupled inductors (k = k max ≈ 1) in series with separate uncoupled inductors, as shown in Fig.…”

Section: Experimental Designmentioning

confidence: 79%

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

Nathan

Ghosh

Siwakoti

et al. 2019

IEEE Trans. Energy Convers.

148

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An enhanced DC-DC converter is proposed in this paper, based on the combination of the Cuk and SEPIC converters, which is well-suited for solar photovoltaic (PV) applications. The converter uses only one switch (which is ground-referenced, so simple gate drive circuitry may be used), yet provides dual outputs in the form of a bipolar DC bus. The bipolar output from the DC-DC converter is able to send power to the grid via any inverter with a unipolar or bipolar DC input, and leakage currents can be eliminated if the latter type is used without using lossy DC capacitors in the load current loop. The proposed converter uses integrated magnetics cores to couple the input and output inductors, which significantly reduces the input current ripple and hence greatly improves the power extracted from the solar PV system. The design methodology along with simulation, experimental waveforms, and efficiency measurements of a 4 kW DC-DC converter are presented to prove the concept of the proposed converter. Further, a 1 kW inverter is also developed to demonstrate the converter's grid-connection potential.

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Section: Experimental Designmentioning

confidence: 79%

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

Nathan

Ghosh

Siwakoti

et al. 2019

IEEE Trans. Energy Convers.

148

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show abstract

“…Experimental results indicate efficiency values, from the current in the inductor to heat in the workpiece at a 90˚ phase shift, of approximately 93%. Another 5% -10% is lost in the power electronics and transformer, depending on the output power, an optimized switching and a nanocrystalline core [18] would significantly improve this.…”

Section: Resultsmentioning

confidence: 99%

Decoupling of Currents in Travelling Wave Induction Heating

Frogner¹,

Cedell²,

Andersson³

2014

JEMAA

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Travelling wave induction heating (TWIH) suffers from severe interference between the coils, which significantly reduces its efficiency. A strategy for decoupling the currents in TWIH is presented, based on the anti-series or anti-parallel connection of several inductors. The study investigates the coupling effect in terms of amplitude and phase shift as functions of current and frequency, respectively, including resonance behavior. In addition, the effects of deviations of the inductor properties are analyzed. Measurements indicate that the strategy produces very good results, almost eliminating the coupling effect, increasing the efficiency, and simplifying control. Simulated and measured results of the heating pattern are compared and efficiency values and power densities are presented.

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“…The core characteristic inductance (A L ) will depend on the type of ferrite used, dimensions and on the way in which the turns have been wound (spacing) [17].…”

Section: Validation Of the Common-mode Transformermentioning

confidence: 99%

Premature wear and recurring bearing failures in an inverter driven induction motor— Part II: The proposed solution

Araujo¹,

Rodrigues²,

Paula

et al. 2013

2013 IEEE Industry Applications Society Annual Meeting

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In a previous work, a real case of recurring bearing failures in an induction motor had been extensively studied. As a result, the cause of the problem was revealed to be the circulation of electric current through the bearings. In this way, the present paper deals with the high-frequency leakage currents in AC motors fed by PWM inverters, contextualized in the analysis of an actual case. From the parameters of an equivalent circuit in terms of cables, motor and inverter return path, a filter, characterized by a common-mode transformer, is proposed to mitigate the common-mode quantities and the correlated problem. Both simulated and experimental results show that the proposed solution represents an advantageous alternative in comparison to the traditional RC and RLC filters, since, in addition to its effect on the common-mode quantities, it dissipates a negligible amount of power.

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Nanocrystalline magnetic materials versus ferrites in power electronics

Cited by 43 publications

References 3 publications

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

Decoupling of Currents in Travelling Wave Induction Heating

Premature wear and recurring bearing failures in an inverter driven induction motor— Part II: The proposed solution

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Nanocrystalline magnetic materials versus ferrites in power electronics

Cited by 43 publications

References 3 publications

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

A New DC–DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter

Decoupling of Currents in Travelling Wave Induction Heating

Premature wear and recurring bearing failures in an inverter driven induction motor&#x2014; Part II: The proposed solution

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Premature wear and recurring bearing failures in an inverter driven induction motor— Part II: The proposed solution