Design and Optimization Procedure for High-Voltage Pulse Power Transformers

Blume, Sebastian; Jaritz, Michael; Biela, J.

doi:10.1109/tps.2015.2448351

Cited by 24 publications

(18 citation statements)

References 10 publications

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“…Transformer design must also ensure minimal leakage inductance for carrying pulse current, minimal losses (considering air cooling possibilities of dry type transformer construction with HV insulation) and sufficient service life. Design challenges of such transformer type are described in [7].…”

Section: Design Challenges Of An Hv Impulse Transformermentioning

confidence: 99%

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High‐voltage pulse transformer for IOT modulators

Jalakas

Janson

Mõlder

et al. 2020

IET Electric Power Applications

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Neutron sources like European Spallation Source consist of linear proton accelerator and beam target. The linear accelerator is supplied by inductive output tubes (IOTs) or klystrons that require high‐voltage DC supply (40 kV). This study describes the design and experimental evaluation of high‐voltage dry‐isolation pulse transformer design evaluation prototype for interleaved IOT supply modules. In order to withstand high‐voltage stress, a modular secondary winding module with multistage voltage field equalisation are designed. Inter‐winding connections are realised in the air as the separate winding outputs are routed together through common high‐voltage isolators. The novelties of the current manuscript are new pulse transformer design and the experimental work. Experiments with full‐scale prototype verified the advantages and revealed, also, some drawbacks of this construction. Proposed transformer design could be used not only in IOT or klystron power supplies but also in high‐voltage DC/DC or AC/AC converters and power electronic transformers, used in the medium‐voltage distribution grids.

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Section: Design Challenges Of An Hv Impulse Transformermentioning

confidence: 99%

“…As one of the project goals was to construct the transformer with dry-type insulation, the design of the transformer isolation was challenging. Design methods, challenges and optimisation procedures of HV impulse transformers are described in [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

High‐voltage pulse transformer for IOT modulators

Jalakas

Janson

Mõlder

et al. 2020

IET Electric Power Applications

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“…In addition, arbitrary core geometries as well as winding arrangements can be included into optimization procedures minimizing the stray capacitance. The calculations are performed in free space, therefore, (8) and (11) in [1] can be simplified to…”

Section: B Stray Capacitancementioning

confidence: 99%

“…6(b). The design curves of the used transformer oil MIDEL7131 [9] are derived from [10] and [11]. With this method, insulations designs with homogenous as well as inhomogeneous field distributions can be investigated.…”

Section: Insulation Design Proceduresmentioning

confidence: 99%

Experimental Validation of a Series Parallel Resonant Converter Model for a Solid State 115-kV Long Pulse Modulator

Jaritz

Blume

Leuenberger

et al. 2015

IEEE Trans. Plasma Sci.

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Medium and high beta cavities used in linear colliders or spallation sources are supplied by klystrons or inductive output tubes amplifiers. The cathode voltage for these amplifiers can be generated by long-pulse modulators generating highly accurate high voltage pulses in the length of milliseconds. With existing modulator topologies, all the demanding requirements like fast pulse rise time, high accuracy, and low voltage ripple hardly can be satisfied at the same time. Common designs like bouncer modulator topologies using pulse transformers become huge for long pulses. The series-parallel resonant converter (SPRC) avoids this drawback as the transformer is operated at high frequencies. In this paper, the comprehensive multidomain model of an SPRC including an electrical model of the inverter, a magnetic model, and an isolation design procedure of the transformer is verified with a prototype of a single module operated under full-load conditions. In addition, a comparison between the predicted parasitics like leakage inductance and stray capacitance of the transformer and the measured values are given. An evaluation of the isolation of the transformer, which is especially crucial for a series connection of the modules, is also performed. In addition, different possibilities to realize the desired series inductance are discussed.

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“…Pulse modulator systems are key elements in many application areas such as cancer treatment, particle accelerators and radar systems. The efficiency of these systems becomes more and more important as an increasing number of accelerator facilities try to reduce the greenhouse gas emissions [1][2][3]. Pulse modulators, which are based on solidstate switches, have been proven to be able to efficiently generate pulses at high power levels [4], [5].…”

Section: Introductionmentioning

confidence: 99%