Modeling and Integrating Losses of Magnetic Components Into Time-Domain Electric Circuit Simulations

In this paper, a conventional 12-pulse transformer unit (CTU) and an autotransformer 12-pulse transformer unit (ATU) are compared in the view of the RTCA DO-160 standard for aircraft applications. The design of the magnetic components is proposed via a coupled FEM-circuital analysis in the time domain for an 800 Hz/2 kW system. Input AC distortion, power factor, and output DC ripple are evaluated through simulations. An accurate power loss analysis is carried out, taking into account copper losses, magnetic losses, and power losses due to power switches. The reduction in the size and weight of the ATU with respect to the CTU solution is discussed, including the need for filtering systems and the standard requirements.

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Time-Domain Dynamic Analysis of Piezoelectric MLA

Volume 8: Dynamic Systems and Control, Parts A and B ◽

10.1115/imece2010-38793 ◽

2010 ◽

Author(s):

Paolo Righettini ◽

Mauro Forlani ◽

Roberto Strada

Keyword(s):

Time Domain ◽

Dynamic Behaviour ◽

Mechanical Systems ◽

Electric Circuit ◽

Transient Phenomena ◽

Step Voltage ◽

Linear Behaviour ◽

High Dynamic ◽

Finite Difference Techniques ◽

Multilayer Actuators

Piezoelectric multilayer actuators (MLAs) are among the most suitable piezoelectric actuators to be integrated into fast mechanical systems, given their high force capabilities and high dynamic response. Overall dynamic behaviour though is influenced by load and driving electric circuit characteristics. The aim of the present work is to investigate the transient dynamics of mechanical systems actuated by MLAs. To this purpose, the system, including the driving electric circuit, is modelled employing finite difference techniques. Such methods are extremely flexible and allow modelling non-linear behaviour and transient phenomena. In particular the response to an input step voltage will be simulated and the influence of the system’s parameters on its response will be investigated. The results provide valuable information such as required currents that can help the engineer in the design process.

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Broadband Modeling of Magnetic Components With Saturation and Hysteresis for Circuit Simulations of Power Converters

IEEE Transactions on Magnetics ◽

10.1109/tmag.2018.2832438 ◽

2018 ◽

Vol 54 (11) ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Bernhard Wunsch ◽

Stanislav Skibin ◽

Ville Forsstrom ◽

Thomas Christen

Keyword(s):

Power Converters ◽

Magnetic Components ◽

Circuit Simulations

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Analysis on the time and frequency domain for the RC electric circuit of fractional order

Open Physics ◽

10.2478/s11534-013-0236-y ◽

2013 ◽

Vol 11 (10) ◽

Cited By ~ 8

Author(s):

Manule Guía ◽

Francisco Gómez ◽

Juan Rosales

Keyword(s):

Differential Equation ◽

Frequency Domain ◽

Time Domain ◽

Cutoff Frequency ◽

Electric Circuit ◽

Electrical Circuit ◽

High Frequencies ◽

The Laplace Transform ◽

Fractional Differential ◽

The Time Domain

AbstractThis paper provides an analysis in the time and frequency domain of an RC electrical circuit described by a fractional differential equation of the order 0 < α≤ 1. We use the Laplace transform of the fractional derivative in the Caputo sense. In the time domain we emphasize on the delay, rise and settling times, while in the frequency domain the interest is in the cutoff frequency, the bandwidth and the asymptotes in low and high frequencies. All these quantities depend on the order of differential equation.

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Influence of Non-Linearity in Losses Estimation of Magnetic Components for DC-DC Converters

Energies ◽

10.3390/en14206498 ◽

2021 ◽

Vol 14 (20) ◽

pp. 6498

Author(s):

Fabio Corti ◽

Alberto Reatti ◽

Gabriele Maria Lozito ◽

Ermanno Cardelli ◽

Antonino Laudani

Keyword(s):

Time Domain ◽

Core Loss ◽

Behavioral Model ◽

Buck Converter ◽

Simulation Environment ◽

Magnetic Devices ◽

The Core ◽

Magnetic Components ◽

Core Losses ◽

The Time Domain

In this paper, the problem of estimating the core losses for inductive components is addressed. A novel methodology is applied to estimate the core losses of an inductor in a DC-DC converter in the time-domain. The methodology addresses both the non-linearity and dynamic behavior of the core magnetic material and the non-uniformity of the field distribution for the device geometry. The methodology is natively implemented using the LTSpice simulation environment and can be used to include an accurate behavioral model of the magnetic devices in a more complex lumped circuit. The methodology is compared against classic estimation techniques such as Steinmetz Equation and the improved Generalized Steinmetz Equation. The validation is performed on a practical DC-DC Buck converter, which was utilized to experimentally verify the results derived by a model suitable to estimate the inductor losses. Both simulation and experimental test confirm the accuracy of the proposed methodology. Thus, the proposed technique can be flexibly used both for direct core loss estimation and the realization of a subsystem able to simulate the realistic behavior of an inductor within a more complex lumped circuit.

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