Some limits of integrated LCT modules for resonant converters at 1 MHz

Strydom, Johan; Wyk, J.D. van; Ferreira, J.A.

doi:10.1109/ias.1999.801685

Cited by 24 publications

(19 citation statements)

References 7 publications

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“…It is possible to integrate more than one electromagnetic energy storage function in one component, creating the possibility to improve the functionality and performance of passive components [16], [17]. A practical realization of this entails enhancing the interlayer capacitance in windings by placing a suitable dielectric between bifilar wound foil conductors and by tuning the reluctance between the primary and secondary winding by a magnetic core section with a low permeability [18], [19], as has been successfully illustrated in practical application [20].…”

Section: Electromagnetically Integrated Componentsmentioning

confidence: 99%

“…Faraday's law gives the following relationship between the induced electric field and the changing magnetic field: (19) and, using this equation the internally induced voltage, can readily be derived as (20) where is the height of the planar connection.…”

Section: A Current Turnoffmentioning

confidence: 99%

“…Table 1 indicates the parameters that have been used to calculate some representative results on the stresses caused by the electromagnetic field transients using (20) and (22). The switching time is varied from 5 through 500 ns, which is typical of the switching times possible with modern MOSFETs.…”

Section: Stresses On Semiconductor Device Due To Electromagnetic Tmentioning

confidence: 99%

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Electromagnetic energy propagation in power electronic converters: toward future electromagnetic integration

Ferreira

Wyk

2001

Proc. IEEE

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I. POWER ELECTRONICS TOWARD ELECTROMAGNETIC ENERGY PROCESSING A. Shrinking Dimensions and Increasing FrequencyStudying the historical development of power electronics [1], [2] indicates that for a long time after its inception, a discrete, decoupled approach to modeling, design, and construction of power electronic converters was totally adequate. Electrical, thermal, and mechanical modeling and design was decoupled, while the sequential type of manufacturing in use was based on using separate components and after laying them out on a plane, wiring them together. This approach had a convenient, almost one-to-one correspondence to the lumped element circuit modeling, using ideal component transfer functions. This discrete, sequential thinking has permeated research, development, design methodology, and teaching to the present. Even hybrid, integrated power electronics modules are still constructed in a quasi-discrete way. However, continuing change in power device technology, a continuing increase in power density and/or frequency [3], [4] over the past decades have resulted in close electromagnetic, thermal, and mechanical coupling of all the "components" and interconnections that comprise the converter, accentuating undesirable side effects due to the close proximity of "components," materials used, interconnections necessary, etc. ("parasitics"). As the tendency toward integration of modules for the future continues, the integrated power processor is approaching (see Fig. 1), signaling the necessity for change in the present methodology for analysis and design. B. The Integrated Power Processor as Electromagnetic DeviceAt present, a power electronic converter may be characterized as a spread-out electromagnetic device. The quest for increased power density continues the reduction in dimensions and the tendency toward physical integration. This will eventually make the electromagnetic coupling between different subsections of the converter, the electromagnetic nature of inter-and intraconnections, and the electromagnetic nature of the switching processes dominant for determining the energy processing transfer function. For this eventual electromagnetic energy processor, it follows that the electromagnetic limits will be dominant and will have to be explored. As an aid to analyze this development of power electronics technology, the different fundamental functions performed in a converter had been defined in previous work [5]. This analysis did not include the thermal and mechanical functions and

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Section: Electromagnetically Integrated Componentsmentioning

confidence: 99%

Section: A Current Turnoffmentioning

confidence: 99%

Section: Stresses On Semiconductor Device Due To Electromagnetic Tmentioning

confidence: 99%

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Electromagnetic energy propagation in power electronic converters: toward future electromagnetic integration

Ferreira

Wyk

2001

Proc. IEEE

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“…"The integrated filter is the planar integrated L-C winding, which consists of a dielectric substrate with conductor windings directly deposited on both sides, thus resulting in a distributed inductance and capacitance structure. Moreover, different equivalent circuits have been achieved by connecting the terminals of integrated LC structure in an appropriate manner" [8][9][10][11][12][13][14].…”

mentioning

confidence: 99%

“…The same principle of [8][9][10][11][12][13][14] is applied for C-core EMI inductor in [15][16]. "The distributed capacitance is implemented in the conventional way, whereas the inductor is implemented by utilizing the cathode and anode foils of the capacitor to form the windings.…”

mentioning

confidence: 99%

Novel integrative options for passive filter inductor in high speed AC drives

Khowja

Gerada

Vakil

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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--This paper presents novel integration options for passive inductor which include: motor-shaped rotational and motor-shaped rotor-less inductor for high speed motor drive system. The novel options have been designed and their performance is compared with the conventional EE core inductor using finite element analysis. It is observed that there is a significant reduction in total losses at fundamental frequency along with substantial reduction in the AC copper loss at 10, 15 and 20 kHz switching frequencies, when the proposed integrated options are utilized. For the motor-shaped rotational inductor, the total losses at fundamental frequency and AC copper loss at different switching frequencies are reduced by 26.1% and 73.8% (at different switching frequencies) respectively. There is a reduction in overall volume by 3.6%, but this comes with 11.7% increase in weight. For the motor-shaped rotor-less inductor, the total losses at fundamental frequency and AC copper loss at different switching frequencies are reduced by 10.4% and 73.8% (at different switching frequencies) respectively. There is a reduction in overall volume by 3.6% but this comes with 6.1% increase in weight. The proposed designs can share the cooling system of the motor thus, eliminating the requirement of separate cooling system.

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