Analytical calculation method for the non-linear characteristic of ferrite-cored inductors with stepped air gap

Stenglein, Erika; Albach, Manfred

doi:10.1007/s00202-016-0432-z

Cited by 14 publications

(6 citation statements)

References 8 publications

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“…The reduction technique can be further refined by integrating the orderestimation algorithm with the proper-orthogonal decomposition reduction model to increase efficiency and decrease computational cost [24]. This can also be done for nonlinear inductors to solve for the magnetic vector potential and inductance as a function of current; results agree well with COMSOL simulations [25]. Another study used a multistage Adomain decomposition method, which is a hybrid analyticalnumerical mathematical technique for solving nonlinear PDEs.…”

Section: A Theoretical Contributionsmentioning

confidence: 79%

A Review of Nonlinear Transmission Line System Design

2020

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Nonlinear transmission lines (NLTLs) have been increasingly studied to produce high power microwaves (HPM) at higher repetition rates than conventional HPM devices without requiring the same auxiliary systems. The ability to array NLTLs to produce higher power and achieve beam steering provides an additional capability. This review summarizes the various NLTL topologies designed to achieve these design objectives. Specifically, we summarize modeling and experimental studies for three primary topologies: the lumped element NLTL, the split ring resonator, and the traditional transmission line geometry using nonlinear materials. The lumped element NLTL and the traditional transmission line constructed with nonlinear materials lend themselves to higher power applications, while the split ring resonator is better suited for applications involving antennas. We provide a detailed summary of past studies for these topologies and conclude by exploring ongoing work and future opportunities for technological development.

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Section: A Theoretical Contributionsmentioning

confidence: 79%

A Review of Nonlinear Transmission Line System Design

2020

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“…15(b). The voltage source and the current source depend on the terminal voltage and current in Equation ( 13) and (14). Where D represents the duty-ratio, and d represents the small signal of the duty-ratio.…”

Section: Resultsmentioning

confidence: 99%

“…This method is precise, but hard to quantitative analysis. In [14,15], the B-H curve of the ferrite is decomposition into linear subproblem. This helps the mathematic module to approximate the real characteristic of the stepped air-gap inductor, easily.…”

mentioning

confidence: 99%

“…This helps the mathematic module to approximate the real characteristic of the stepped air-gap inductor, easily. Even so, [14,15] still lack of an intuitive method to find out the boundary inductor current. In this paper, the stepped air-gap ferrite inductor is analyzed according to the magnetoresistance to help realize the composition of the equation and applied in the boost-type PFC converter.…”

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confidence: 99%

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Design of Boost-Type Power Factor Correction With Stepped Air-Gap Ferrite Inductor for Peak-Power-Load Condition

et al. 2022

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This paper presents the designed method and the implementation of stepped air-gap ferrite inductor applied in power factor correction (PFC). Conventionally, the input inductor of the PFC has a designed consideration on the maximum output power; thus, designing the PFC for peak-power-load conditions results in a very large inductor. The proposed designed method improves the load-carrying capability without increasing the volume of the inductor when the PFC is operating in peak-power-load conditions. The stepped air-gap ferrite inductor maintains the inductance in the rated-full-load and sustains the peak-power-load conditions with the lower inductance. Compared with the convectional ferrite inductor, the proposed method can maintain the size and the efficiency of the power supply, and promote the powercarrying ability. The detailed analysis and the design of the proposed method are described. Experimental results are recorded and evaluated by a prototype PFC with an AC input voltage of 110-264 VAC and a DC output voltage of 384 VDC. Finally, the volume of input inductor is kept with 40950 mm 2 , the efficiency is also same compared with the conventional inductor, and the load-carrying capability of the converter is promoted from the normal rated power of 1 kW to the peak power load of 2 kW.

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“…The arctangent model ( 17) is used as starting point to model ferrite-core inductors with a stepped air gap 41 (shown in Figure 12), which allows achieving a controlled decrease in inductance at large current values. 51,52 In this case, the inductance is modeled as a double arctangent, shown in Figure 11E:…”

Section: Arctangent Modelsmentioning

confidence: 99%

Nonlinear models of power inductors: A survey

Oliveri

Lodi

Storace

2021

Circuit Theory & Apps

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Summary Switch‐mode power supplies (SMPSs) are widely exploited to interface electrical energy sources to motors and other electrical loads. Inductors are usually the biggest and heaviest components in SMPSs, limiting their overall power density. Therefore, there is an increasing interest in designing SMPSs with partially saturating inductors, because this significantly reduces their weight and size, thus increasing power density. This paper provides a review of nonlinear behavioral models (based on easy‐to‐measure quantities) of the inductance, power loss, and temperature rise of inductors working, at least partially, in magnetic saturation. This survey discusses the pros, cons, and ranges of validity of these models, with a glimpse at their application to SMPS simulation, design, monitoring, and control.

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Analytical calculation method for the non-linear characteristic of ferrite-cored inductors with stepped air gap

Cited by 14 publications

References 8 publications

A Review of Nonlinear Transmission Line System Design

A Review of Nonlinear Transmission Line System Design

Design of Boost-Type Power Factor Correction With Stepped Air-Gap Ferrite Inductor for Peak-Power-Load Condition

Nonlinear models of power inductors: A survey

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