Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 116) Show all publications
Kovačević-Badstübner, I., Grossner, U., Romano, D., Antonini, G. & Ekman, J. (2018). A more accurate electromagnetic modeling of WBG power modules. In: Proceedings of the International Symposium on Power Semiconductor Devices and ICs: . Paper presented at 30th IEEE International Symposium on Power Semiconductor Devices and ICs (ISPSD), Chicago, IL, USA, 13-17 May, 2018 (pp. 260-263). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>A more accurate electromagnetic modeling of WBG power modules
Show others...
2018 (English)In: Proceedings of the International Symposium on Power Semiconductor Devices and ICs, Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 260-263Conference paper, Published paper (Refereed)
Abstract [en]

A major requirement for further development of wide-band gap (WBG) power devices and their applications is the optimization of packages and PCB layouts to enable fast-switching capabilities. Electromagnetic modelling allows the prediction of parasitic inductances, capacitances, and resistances of the current paths within power modules, which cannot be easily approached in measurements. As a result, electromagnetic-circuit-coupled modeling enables the optimization of package layouts and interconnections before manufacturing actual power modules. The accuracy and limitations of present numerical techniques for three-dimensional (3D) electromagnetic modeling of power modules is still neither well understood nor verified. This paper presents the extraction of parasitics of power semiconductor packages using two electromagnetic modelling approaches. The first approach is based on a well-established 3D electromagnetic quasi-static solver, ANSYS Q3D Extractor. For the second approach, a numerical solver based on the Partial Element Equivalent Circuit (PEEC) method is developed and assessed in terms of modelling accuracy required by fast switching WBG-based power converters. The PEEC method is presented as a promising numerical technique, which can potentially be used to overcome the limitations of the EM modeling based on the ANSYS Q3D Extractor.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-70373 (URN)10.1109/ISPSD.2018.8393652 (DOI)978-1-5386-2927-7 (ISBN)
Conference
30th IEEE International Symposium on Power Semiconductor Devices and ICs (ISPSD), Chicago, IL, USA, 13-17 May, 2018
Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2018-08-16Bibliographically approved
De Lauretis, M., Antonini, G. & Ekman, J. (2018). A Simulink implementation of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines. In: EMC Europe 2018: . Paper presented at International Symposium and Exhibition on Electromagnetic Compatibility, Amsterdam, August 27-30, 2018 (pp. 817-822). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), Article ID 8485071.
Open this publication in new window or tab >>A Simulink implementation of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
2018 (English)In: EMC Europe 2018, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 817-822, article id 8485071Conference paper, Published paper (Refereed)
Abstract [en]

The electromagnetic compatibility (EMC) performances of a product can seriously be affected by interconnects. Interconnects can be studied by using the multiconductor transmission lines (MTLs) theory. Mathematical models of MTLs are normally validated with the aid of well-known software, such as MATLAB or PSpice. Simulink is part of the MATLAB suite but is not frequently used, and it is often underestimated both in academia and in the university education. In this paper, we briefly review the mathematical model for MTLs called DeRaG, which is a rational model based on delay extraction. Then, we propose the corresponding Simulink implementation for a 3-conductor transmission line. The Simulink has high readability, is accurate and the simulation time is remarkably faster than the corresponding model obtained in PSpice.

Place, publisher, year, edition, pages
Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2018
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
Keywords
Transmission lines, MATLAB/Simulink, SPICE, transient simulations
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-69302 (URN)10.1109/EMCEurope.2018.8485071 (DOI)000454901100150 ()2-s2.0-85056136450 (Scopus ID)978-1-4673-9698-1 (ISBN)
Conference
International Symposium and Exhibition on Electromagnetic Compatibility, Amsterdam, August 27-30, 2018
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2019-01-28Bibliographically approved
Kovačević-Badstübner, I., Romano, D., Antonini, G., Ekman, J. & Grossner, U. (2018). Electromagnetic Modeling Approaches Towards Virtual Prototyping of WBG Power Electronics. In: 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia): . Paper presented at 2018 International Power Electronics Conference, 20-24 May 2018,Niigata, Japan (pp. 3588-3595). Piscataway, NJ: IEEE, Article ID 8507365.
Open this publication in new window or tab >>Electromagnetic Modeling Approaches Towards Virtual Prototyping of WBG Power Electronics
Show others...
2018 (English)In: 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), Piscataway, NJ: IEEE, 2018, p. 3588-3595, article id 8507365Conference paper, Published paper (Refereed)
Abstract [en]

High frequency power electronics utilizing wide-band gap semiconductor devices imposes more stringent requirements for highly accurate extraction of parasitics of power electronics systems in a wide frequency range. This paper presents the state-of-the-art modeling approaches used to predict the electromagnetic behavior of power electronic systems and components in terms of accuracy and computational cost. The potential of the Partial Element Equivalent Circuit (PEEC) technique for virtual prototyping of power electronic systems is assessed. The main advantage of this numerical technique is its capability for direct coupling between the circuit and electromagnetic domains provided by the PEEC meshing of three-dimensional geometries in partial elements. The aim of this paper is to provide a more comprehensive understanding of PEEC-based modeling for power electronics packaging.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2018
Series
International Conference on Power Electronics, ISSN 2150-6078
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-71409 (URN)10.23919/IPEC.2018.8507365 (DOI)000449328903086 ()2-s2.0-85057342975 (Scopus ID)978-4-88686-405-5 (ISBN)
Conference
2018 International Power Electronics Conference, 20-24 May 2018,Niigata, Japan
Available from: 2018-11-01 Created: 2018-11-01 Last updated: 2019-01-14Bibliographically approved
Antonini, G., De Lauretis, M., Ekman, J. & Miroshnikova, E. (2018). On the passivity of the Delay-Rational Green’s-function-based model for Transmission Lines. In: Trends in Mathematics, Research Perspectives: . Paper presented at ISAAC 2017 Lund.
Open this publication in new window or tab >>On the passivity of the Delay-Rational Green’s-function-based model for Transmission Lines
2018 (English)In: Trends in Mathematics, Research Perspectives, 2018Conference paper, Published paper (Refereed)
National Category
Engineering and Technology Other Electrical Engineering, Electronic Engineering, Information Engineering Mathematical Analysis
Research subject
Industrial Electronics; Mathematics
Identifiers
urn:nbn:se:ltu:diva-68946 (URN)
Conference
ISAAC 2017 Lund
Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-05-29
Hartman, A., Romano, D., Antonini, G. & Ekman, J. (2018). Partial Element Equivalent Circuit Models of Three-Dimensional Geometries Including Anisotropic Dielectrics. IEEE transactions on electromagnetic compatibility (Print), 60(3), 696-704
Open this publication in new window or tab >>Partial Element Equivalent Circuit Models of Three-Dimensional Geometries Including Anisotropic Dielectrics
2018 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 60, no 3, p. 696-704Article in journal (Refereed) Published
Abstract [en]

During recent years anisotropic materials have received an increasing interest and found important applications in the field of shielding and antennas. The anisotropy may be due to intrinsic properties, or as a consequence of mixing. Intentionally or not, the anisotropy impacts the electromagnetic (EM) behavior of a system. Therefore, it is desirable to be able to incorporate the anisotropic effects in an EM model, to allow design tasks and analysis. In this paper, the partial element equivalent circuit (PEEC) formulation is extended to handle nondispersive linear anisotropic dielectrics. The anisotropic dielectric PEEC cell is derived and the resulting PEEC equations are developed into a descriptor system form, which is well suited for implementation in SPICE-like solvers, and for reduction by model-order reduction techniques. A verification of the model is given by a numerical example of a patch antenna situated on an anisotropic substrate and the results are in good agreement with a finite-difference time-domain implementation. The proposed PEEC model is of interest for further work, i.e., in the modeling of setups involving mixtures of materials, with an orientational alignment, and engineered materials, encountered in different EM compatibility applications.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-65639 (URN)10.1109/TEMC.2017.2724071 (DOI)000422793900018 ()2-s2.0-85028449937 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-01-25 (andbra)

Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2019-01-17Bibliographically approved
Hartman, A., Ekman, J., Lang, D., Romano, D. & Antonini, G. (2018). PEEC Models of Printed Antennas in Condition Monitoring Applications Covered by Dielectrics with Temperature-Dependent Permittivity. In: 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE): . Paper presented at International Symposium on Electromagnetic Compatibility, EMC Europe 2018, Amsterdam, The Netherlands, 27-30 August 2018 (pp. 343-348). Piscataway, NJ: IEEE, Article ID 8485032.
Open this publication in new window or tab >>PEEC Models of Printed Antennas in Condition Monitoring Applications Covered by Dielectrics with Temperature-Dependent Permittivity
Show others...
2018 (English)In: 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE), Piscataway, NJ: IEEE, 2018, p. 343-348, article id 8485032Conference paper, Published paper (Refereed)
Abstract [en]

In wireless condition monitoring systems the antenna serves as a critical part of the data transmission link. A condition monitoring application usually pose a challenging environment for an antenna system, as they are often found in harsh machine environments. As conventional antennas usually are designed for free-space operation and for some design temperature range, the presence of additional materials and their temperature variation are commonly not accounted for. In this paper an attempt to highlight the impact of materials' temperature-dependence, in their electrical properties, on printed antenna characteristics is presented. Partial element equivalent circuit models of a common printed antenna design are developed. By incorporating temperature-dependent permittivity models of pure water, and a mixture of an industrial lubricant and water, the impact on the antenna's resonant behavior is demonstrated. The numerical examples highlight that the temperature variation in the permittivity of materials surrounding the printed antenna may impact the antenna characteristics enough to be considered in the design, if a degradation in performance is not an option.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2018
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-72331 (URN)10.1109/EMCEurope.2018.8485032 (DOI)000454901100065 ()2-s2.0-85056091979 (Scopus ID)978-1-4673-9698-1 (ISBN)
Conference
International Symposium on Electromagnetic Compatibility, EMC Europe 2018, Amsterdam, The Netherlands, 27-30 August 2018
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2019-01-28Bibliographically approved
Hartman, A., Ekman, J., Antonini, G. & Romano, D. (2016). A Descriptor Form Implementation of PEEC Models Incorporating Dispersive and Lossy Dielectrics (ed.). In: (Ed.), 2016 IEEE International Symposium on Electromagnetic Compatibility (EMC): Otawa, Canada, 25-29 July 2016. Paper presented at IEEE International Symposium on Electromagnetic Compatibility : 25/07/2016 - 29/07/2016 (pp. 206-211). Piscataway, NJ: IEEE Computer Society, Article ID 7571645.
Open this publication in new window or tab >>A Descriptor Form Implementation of PEEC Models Incorporating Dispersive and Lossy Dielectrics
2016 (English)In: 2016 IEEE International Symposium on Electromagnetic Compatibility (EMC): Otawa, Canada, 25-29 July 2016, Piscataway, NJ: IEEE Computer Society, 2016, p. 206-211, article id 7571645Conference paper, Published paper (Refereed)
Abstract [en]

With rising frequencies involved in electronics, losses and dispersion exhibited by dielectrics become important to consider in electromagnetic modeling. The Partial Element Equivalent Circuit (PEEC) method is suitable for a mixed electromagnetic and circuit setting, forming equivalent circuits that can be interconnected with circuit elements. In this paper, a descriptor form representation of PEEC models incorporatingdispersive and lossy dielectrics is developed. By representing the electrical permittivity with a Debye-Lorentz model equivalent circuits can be synthesized. The synthesized circuits for the permittivity are included in the PEEC equations by formulating the circuit equations for the additional circuit unknowns. This yields an input/output formulation that can handle an arbitrary number of finite dielectrics and be integrated by any kind of integration scheme. Furthermore, it offers a straightforward way to incorporate lossy and dispersive dielectrics into a PEEC solver compared to using recursive convolution. The proposed descriptor form representation is tested for a setup consisting of three microstrips over a ground plane, separated by a dielectric substrate. Both the ideal and the lossy and dispersive case are tested and compared. Furthermore, the proposed formulation is verified against an existing implementation in the frequency domain. Good agreement between the proposed formulation andthe existing frequency-domain PEEC formulation is obtained.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Computer Society, 2016
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-38090 (URN)10.1109/ISEMC.2016.7571645 (DOI)000387117700061 ()2-s2.0-84990982208 (Scopus ID)c5b527d2-5891-44b8-8ef3-78de432285db (Local ID)978-1-5090-1442-2 (ISBN)c5b527d2-5891-44b8-8ef3-78de432285db (Archive number)c5b527d2-5891-44b8-8ef3-78de432285db (OAI)
Conference
IEEE International Symposium on Electromagnetic Compatibility : 25/07/2016 - 29/07/2016
Note

Validerad; 2016; Nivå 1; 2016-12-01 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2019-01-17Bibliographically approved
De Lauretis, M., Ekman, J. & Antonini, G. (2016). A SPICE Realization of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines (ed.). IEEE transactions on electromagnetic compatibility (Print), 58(4), 1158-1168
Open this publication in new window or tab >>A SPICE Realization of the Delay-Rational Green's-Function-based Method for Multiconductor Transmission Lines
2016 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 58, no 4, p. 1158-1168Article in journal (Refereed) Published
Abstract [en]

Virtual prototyping has become an unavoidable step in the design of electrical and electronic systems.In this context, time-domain models have to be efficiently embedded in circuit simulator environments, such as SPICE-like transient simulators.Recently, the authors focused on the interconnections, modeled using the multiconductor transmission lines theory, and a Delay-Rational method has been developed, based on Green's functions and line-delay extraction.This work presents a SPICE synthesis of the Delay-Rational method previously developed by the authors.The solution was tested for three transmission lines with frequency-independent per-unit-length parameters.We compared the SPICE results of the Delay-Rational method with those of two standard techniques: one based on a pure rational model and one based on the inverse fast Fourier transform.The time-domain simulations in SPICE of the Delay-Rational method show both accuracy and a remarkable reduction in the number of components used with respect to a purely rational approach, by virtue of the delay extraction.

Keywords
Transmission lines, interconnections, SPICE, Technology - Electrical engineering, electronics and photonics, Teknikvetenskap - Elektroteknik, elektronik och fotonik
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-7309 (URN)10.1109/TEMC.2016.2546552 (DOI)000381435700026 ()2-s2.0-84981765159 (Scopus ID)5a7bbb0a-150d-4d5a-b071-e36775096c8b (Local ID)5a7bbb0a-150d-4d5a-b071-e36775096c8b (Archive number)5a7bbb0a-150d-4d5a-b071-e36775096c8b (OAI)
Note

Validerad; 2016; Nivå 2; 20160129 (mardel)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-09-28Bibliographically approved
Mäkitaavola, K., Stöckel, B.-M., Sjöberg, J., Hobbs, S., Ekman, J., Henschel, M. & Wickramanayake, A. (2016). Application of InSAR for monitoring deformations at the Kiirunavaara Mine. In: Mitri, H; Shnorhokian, S; Kumral, M; Sasmito, A; Sainoki, A (Ed.), Operational and Environmental Mine Health and Safety Practice and Innovation: . Paper presented at 3rd International Symposium on Mine Safety Science and Engineering (ISMS), McGill University, Montreal, Canada, AUG 13-19, 2016 (pp. 133-139). Montreal: McGill University.
Open this publication in new window or tab >>Application of InSAR for monitoring deformations at the Kiirunavaara Mine
Show others...
2016 (English)In: Operational and Environmental Mine Health and Safety Practice and Innovation / [ed] Mitri, H; Shnorhokian, S; Kumral, M; Sasmito, A; Sainoki, A, Montreal: McGill University. , 2016, p. 133-139Conference paper, Published paper (Refereed)
Abstract [en]

An integral part of sublevel cave underground mining is the associated caving of the surrounding host rock. This causes mining-induced ground surface deformations on both the hangingwall and footwall side of the orebody. The municipality of Kiruna, in northern Sweden, is located in close proximity to the LKAB Kiirunavaara mine and is thus unavoidably affected by the mining activities. To be able to plan for an urban transformation, as the effects of mining approach the city infrastructure, it is necessary to monitor the ground deformations on a regular basis. Historically, GPS-monitoring has been used, with an extensive network of measurement hubs in place. New techniques for monitoring ground deformations are, however, constantly evaluated. As part of this process, LKAB has conducted a five-year research and development project on deformation measurements using radar satellites and the InSAR technology. The project has included a monitoring component and a research-and technology transfer component. The overall findings of the monitoring program, and the associated research and development work are presented. Particular emphasis is put on achieved accuracy and the implications for the ability to reliably monitor the progressing deformations toward the municipality and existing infrastructure. Lessons learnt from the conducted work are presented, followed by recommendations on future use of InSAR for this type of application

Place, publisher, year, edition, pages
Montreal: McGill University., 2016
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-66108 (URN)000410525800021 ()978-1-77247-005-5 (ISBN)
Conference
3rd International Symposium on Mine Safety Science and Engineering (ISMS), McGill University, Montreal, Canada, AUG 13-19, 2016
Available from: 2017-10-13 Created: 2017-10-13 Last updated: 2017-11-24Bibliographically approved
De Lauretis, M., Ekman, J. & Antonini, G. (2016). Delayed-rational Green's-function-based method of transmission lines and the Heaviside condition. In: 2016 IEEE Electrical Design of Advanced Packaging and Systems Symposium, EDAPS 2016: . Paper presented at IEEE Electrical Design of Advanced Packaging and Systems (EDAPS) Symposium 2016,Dec 14-16 2016, Honolulu, HI USA (pp. 143--145). Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), Article ID 7893147.
Open this publication in new window or tab >>Delayed-rational Green's-function-based method of transmission lines and the Heaviside condition
2016 (English)In: 2016 IEEE Electrical Design of Advanced Packaging and Systems Symposium, EDAPS 2016, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2016, p. 143--145, article id 7893147Conference paper, Published paper (Refereed)
Abstract [en]

In electronics as well as in communications, it ishighly desirable to be able to transmit a signal that is preservedfrom any distortions that is due to the lossy nature of themedium in which the signal travels, normally a transmission line.In this paper, we exploit the connections between the delayedGreen’s-function-based method from the authors and the wellknowndistortionless Heaviside condition. It is found that, inthe method, an important results was already present but itsimportance not yet understood. In particular, we prove that weare able to identify the distortionless transmission line associatedto a generic transmission line. We consider only 1-conductortransmission lines, with frequency-independent per-unit-lengthparameters. The multiconductor transmission-line case will beaddressed in future works.

Place, publisher, year, edition, pages
Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2016
Keywords
Heaviside condition, transmission lines, interconnections.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-59665 (URN)10.1109/EDAPS.2016.7893147 (DOI)000408917200034 ()2-s2.0-85018459154 (Scopus ID)9781509061846 (ISBN)
Conference
IEEE Electrical Design of Advanced Packaging and Systems (EDAPS) Symposium 2016,Dec 14-16 2016, Honolulu, HI USA
Projects
SvK
Available from: 2016-10-11 Created: 2016-10-11 Last updated: 2018-09-28Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4160-214x

Search in DiVA

Show all publications