Calorimetric apparatus for measurement of power losses in capacitors

Séguin, Bernard; Gosse, J.P.; Sylvestre, Alain; Fouassier, P.; Ferrieux, Jean-Paul

doi:10.1109/imtc.1998.679863

Cited by 25 publications

(19 citation statements)

References 7 publications

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“…This is the value obtained from the formula given by Seguin [19] using the equation (4) where is the sheet resistivity in ohms per square and and are the metal film length and width, respectively, in squares. Since two adjacent metallized films are used, is double the value of obtained from (4).…”

Section: Discussionmentioning

confidence: 99%

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Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

Brown

2007

IEEE Trans. Comp. Packag. Technol.

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Linkage between the distributed-circuit capacitor model and multi-layer capacitor structures is demonstrated. Capacitor inductance leading to self-resonance in standard metallized polymer capacitors arises from lead and package inductance and can be represented by lumped inductance external to the capacitor modeling in this paper.Distributed internal capacitor inductance is negligible in metallized polymer capacitors for most applications and therefore is not considered in the analysis. Two different distributed-circuit topologies, both of which arise in practice-one by design and the other by degradation-are considered. One has the two connecting electrodes on opposite ends of the capacitor and the other has both input electrodes on the same end. The electrical performance of the two connection topologies is compared using numerical 10-stage lumped element modeling. Cross comparisons are made using diffusion equation modeling for the single-end connection topology. Strong correspondence between results from numerical lumped element distributed approximations and from diffusion equation analysis for the single-end connection is demonstrated up to 100 MHz, this inferring similar accuracy for lumped element modeling of the double-end connected capacitor topology. The results show that the two connection topologies exhibit similar behavior up to at least the typical self resonance frequency of the capacitor, except for the cross-dielectric voltage and cross-width power dissipation profiles which are fundamentally different. Voltage drop across the metallic films is shown to be small in normal steady state operation. The contribution of the metallic film to the equivalent series resistance is shown to be constant with frequency up to a frequency where distributed -filtering becomes significant. Beyond this, both equivalent series resistance and capacitance fall with the square root of frequency for the single-end connected capacitor. Similarly, the dissipation factor initially rises in direct proportion to frequency and power dissipated in the metal film increases with the square of frequency. Progressive disconnection of distant metal film with frequency, due to filtering, is shown to be responsible for the changes in these relationships and the parameters of the capacitor.

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Section: Discussionmentioning

confidence: 99%

“…Since the floor value of the for MPP capacitors is typically 0.002% [19], [27], dielectric losses must predominantly determine the in this region.…”

Section: H Dissipation Factormentioning

confidence: 99%

Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

Brown

2007

IEEE Trans. Comp. Packag. Technol.

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“…Numerous specialist calorimeter topologies exist suitable for the measurement of power transformer losses, [5], magnetic core material losses, [6], Integrated Power Electronic Module (IPEM) losses, [7], capacitor losses [8] and power analyser calibration, [9]. General purpose calorimeter topologies applicable to power electronic systems and electrical machines typically take the form of open, Fig.…”

Section: Introductionmentioning

confidence: 99%

An accurate and flexible calorimeter topology for power electronic system loss measurement

Simpson

Hopkins

2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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“…Other versions are presented in [4] and [6] to determine the power losses in electrical machines. Determination of losses in a capacitor is also difficult by using the measurement of electrical power and [5] uses isothermal calorimetry. The applications of calorimetry are many, e.g.…”

Section: Introductionmentioning

confidence: 99%

Calorimetric measuring systems for characterizing high frequency power losses in power electronic components and systems

Blaabjerg

Pedersen

Ritchie

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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High frequency power losses in power electronic components and systems are very difficult to measure. The same applies to the efficiency of high-efficiency systems and components. An important method to measure losses with high accuracy is the calorimetric measuring system. This paper describes two different calorimetric measuring systems, one for power losses up to 50 W and one for power losses up to 1500 W. These differ in size and also the systems which can be analysed. The basic concept of calorimetry is discussed and the overall performance of the two systems is specified. Methods to calibrate such systems are proposed and different applications of the systems are given. Two practical examples end the description of the research. It is concluded that such systems have a relative long time-constant but they are accurate and useful for precise power loss measurement.

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Calorimetric apparatus for measurement of power losses in capacitors

Cited by 25 publications

References 7 publications

Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

An accurate and flexible calorimeter topology for power electronic system loss measurement

Calorimetric measuring systems for characterizing high frequency power losses in power electronic components and systems

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