A Magnetic Design Method Considering DC-Biased Magnetization for Integrated Magnetic Components Used in Multiphase Boost Converters

Imaoka, Jun; Okamoto, Ken‐ichi; Kimura, Shota; Noah, Mostafa; Martínez, Wilmar; Yamamoto, Masaaki; Shoyama, Masahito

doi:10.1109/tpel.2017.2707385

Cited by 27 publications

(23 citation statements)

References 30 publications

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“…For this class of converters, it is possible to integrate more than one magnetic component in one magnetic structure. The magnetic integration adds many attractive advantages to the converter circuits from the point of view of performance, packaging size and cost (Cuk, 1983; Zurnel et al , 2003; Wong et al , 2000; Cao et al , 2022; Imaoka et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Gyrator-capacitor based modelling and simulation of forward converter

Koseni

Yıldız

2022

COMPEL

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Purpose This paper aims to propose an efficient model for analysis of power electronic circuits with integrated magnetic components. Design/methodology/approach The inductance modeling technique is used as the traditional method for analyzing magnetic components. This model is simple and enough to generate for individual components, that is, an inductor and a transformer. However, it becomes difficult to realize this model for the integrated magnetic structures. This paper shows an appropriate model for individual magnetic components as well as integrated magnetic components and its application to magnetically coupled DC–DC converters. Gyrator–capacitor (G–C) modeling offers a unified, reasonable way of understanding the magnetic components commonly met with in power electronics and the other disciplines. Findings G–C model allows any electrical and magnetic circuit to be simultaneously simulated with circuit simulators. In this regard, this paper gives a complete simulation model and analysis as an illustrative example. There is no limitation of this paper or future works. The proposed G–C model can be applied to all power electronic circuits having integrated magnetic components. Originality/value In the proposed model, the magnetic circuit is converted to a pure electric circuit with capacitors and controlled sources; every winding is replaced with a pair of current controlled voltage sources, namely, a gyrator.

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Section: Introductionmentioning

confidence: 99%

Gyrator-capacitor based modelling and simulation of forward converter

Koseni

Yıldız

2022

COMPEL

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“…As coupled inductor configurations, they can be classified into directly or inversely coupled inductors. As circuit analysis for two-phase interleaved boost converters, directly coupled inductors operating at discontinues or continues current modes are analysed in [7,8], and inversely coupled inductors are described in [8][9][10][11][12][13][14]. The circuit configuration of interleaved boost converter with inversely coupled inductor is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…As seen in Figure 3, the dotted line shows the DC magnetic flux related to mutual inductance, and the solid line shows the DC magnetic flux related to leakage inductance. In general, the inductor average current of each phase is controlled to be equal, and one of the control methods is described in [14]. Therefore, the DC flux generated by the inductor average currents of each phase is cancelled only for the DC flux component related to the mutual inductance out of the total DC flux.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, only the DC flux component related to the leakage inductance remains as shown in Figure 3c. In general, coupled inductors with a higher coupling coefficient is more effective in suppressing the inductor ripple current [14]. For that reason, an air gap is inserted in the central leg of the E‐core for adjusting coupling coefficients.…”

Section: Introductionmentioning

confidence: 99%

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Improving DC superimposition characteristics of powder cores by applying coupled inductors in multi‐phase boost converter

Aoki

Imaoka

Yamamoto

et al. 2021

IET Power Electronics

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In applications where DC current is superimposed, such as inductors for non‐isolated DC‐DC converters, powder core can be considered as an attractive solution owing to its superior features such as: high saturation flux density, high Curie temperature, and soft‐saturation property. However, in powder cores, a drop of inductance appears prominently due to DC superimposition characteristics. This feature is not a desirable characteristic because it leads to an increase in the inductor ripple current under heavy load, which complicates the thermal design of power semiconductors and capacitors. This paper verifies the improvement of DC superimposition characteristics of powder cores by applying coupled inductors. First, the effect of coupled inductors on the improvement of DC superimposition characteristics is experimentally verified. Second, a measurement method for the DC superimposition characteristics of coupled inductor is proposed. Then, a magnetic circuit model is built using the measurement results. Finally, a coupled analysis of magnetic and electric circuits is performed, and it is confirmed that lower magnetic field operation can be realized by coupled inductors even under heavy load conditions. It has been proven that coupled inductors are effective in improving the DC superposition characteristics of the powder cores.

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“…Therefore, a specific frequency exists to realize the minimum device size. This frequency is dependent on the input/output power conditions, but it is expected to increase with the improvement in the structures and materials of the passive components [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

2 kW Dual-Output Isolated DC/DC Converter Based on Current Doubler and Step-Down Chopper

Matsushita

Noguchi

Taguchi

et al. 2020

WEVJ

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In the context of the auxiliary power for motor-driven vehicles having two systems, we propose a new topology for a dual-output isolated DC/DC converter, which offers advantages in terms of efficiency and size. The proposed circuit consists of an H-bridge inverter, a transformer, and an integrated circuit of a current doubler and step-down chopper. Considering the high power and high frequency, our objective was to evaluate and identify the issues of an actual device with a power output of 2 kW and switching frequency of 400 kHz. The circuit feasibility was examined through measurements of the prototype, and both the voltage target response and load disturbance response characteristics were confirmed to operate as designed. The maximum and minimum efficiencies of this circuit were 81.3 and 61.5%, respectively, demonstrating that the load loss of the step-down chopper had a significant impact on the efficiency. The loss analysis revealed that the loss at the integrated circuit on the secondary side accounted for more than 50% of the total loss. Moreover, issues such as the behavior at power-on, efficiency, and size were identified and evaluated, thereby achieving the objectives of the study.

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A Magnetic Design Method Considering DC-Biased Magnetization for Integrated Magnetic Components Used in Multiphase Boost Converters

Cited by 27 publications

References 30 publications

Gyrator-capacitor based modelling and simulation of forward converter

Gyrator-capacitor based modelling and simulation of forward converter

Improving DC superimposition characteristics of powder cores by applying coupled inductors in multi‐phase boost converter

2 kW Dual-Output Isolated DC/DC Converter Based on Current Doubler and Step-Down Chopper

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