A novel prototype design for a transformer for high voltage, high frequency, high power use

Fothergill, J.C.; Devine, Philip; Lefley, Paul

doi:10.1109/61.905601

Cited by 41 publications

(10 citation statements)

References 7 publications

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“…Although it may be possible to use dry and clean air at normal atmospheric pressure for prototype power supplies, in industrial applications high-voltage transformers are submerged in the oil or sealed with SF 6 gas. [40]. Table I shows different parameters of the high-voltage transformer prototype.…”

Section: High-voltage Transformermentioning

confidence: 99%

Analysis of a Fifth-Order Resonant Converter for High-Voltage DC Power Supplies

Shafiei

Pahlevaninezhad

Farzanehfard

et al. 2013

IEEE Trans. Power Electron.

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Power transformer is one of the most complex parts of power converters. The complicated behavior of the transformer is usually neglected in the power converter analysis and a simple model is mostly used to analyze the converter. This paper presents a precise analysis of a fifth-order resonant converter which has incorporated the resonant circuit into the transformer. The derived model, which is based on the accurate model of the power transformer, can fully predict the behavior of the fifth-order resonant converter. The proposed fifth-order resonant converter is able to effectively reduce the range of phase-shift angle from no load to full load for a fixed-frequency phase-shift control approach. Therefore, the converter is able to operate under zero voltage switching during entire load range with a fixed-frequency control method. Also, the proposed converter offers a high gain which leads to a lower transformer turns ratio. A 10-kVDC, 1.1-kW prototype has been prepared to evaluate the performance of the proposed converter. The experimental results exhibit the excellent accuracy of the proposed model and the superiority of the performance compared to the lower order resonant converters, especially for high-voltage applications.Index Terms-Fifth-order resonant converter, high-voltage dc power supply, phase-shift fixed-frequency control approach, steady state analysis, zero voltage switching (ZVS) operation.

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Section: High-voltage Transformermentioning

confidence: 99%

Analysis of a Fifth-Order Resonant Converter for High-Voltage DC Power Supplies

Shafiei

Pahlevaninezhad

Farzanehfard

et al. 2013

IEEE Trans. Power Electron.

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“…Because the planar transformer ' s core is flat, and the windings are ML-PCB, the method of calculating the temperature rise with natural cooling is simply not applicable. Consequently a method described by John C. Fothergill [7] was used for the temperature rise calculations. A 35°C temperature rise was determined by these calculations.…”

Section: Thermal Analysismentioning

confidence: 99%

Design of a planar power transformer for high voltage, high frequency use

Wang¹,

Xiao²,

Liu³

2010

IEEE PES T&D 2010

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A high-voltage (15 kV) power transformer using multilayer printed circuit board (ML-PCB) technology is presented for applications in switched-mode power supplies, whose output power is 4.5 kW, and inverting frequency is 20 kHz. A new configuration for the magnetic core is proposed based on planar EI cores. The parallel connection of planar cores was adopted as a unit, and several units were cascaded to form the high voltage transformer. Manufacturing the PCB involves small tolerances, so the transformer exhibits parasitic effects which are highly reproducible from a production viewpoint. The mechanical configuration of a laboratory prototype is discussed, as well as the electrical, parasitic, and thermal behaviors. The transformer was tested and found to have an efficiency of better than 96%. Compared with traditional high voltage transformers, this transformer has good thermal behavior, good line insulation properties and a high power density.

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“…Transformer is an extremely important factor in high-frequency ESP power converter, the parasitic capacitance and leakage inductance has a great impact on the output of the power supply, the leakage inductance can be measured through a range of means distributed capacitance is currently no the measured specific means [5,6].…”

Section: Introductionmentioning

confidence: 99%

The influence of parallel capacitor to output voltage in high-frequency ESP power

Zhang¹,

Zhang²,

Zhou³

2013

2013 IEEE Electrical Power &Amp; Energy Conference

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High frequency power supply has been widely used in electrostatic precipitator (ESP) systems. High level of parasitic capacitance is generated in the windings of the transformer, which is used to boost voltage to around one hundred volt. The stray capacitor can be treated as a capacitor in parallel with primary winding of the transformer. Due to the parasitic capacitance of the high voltage transformers, the topology of the converter in ESP systems is actually LCC resonant converter rather than LC resonant converter. Analysis of four operating modes of the LCC resonant converter, and the calculation of the series inductance, series capacitors, shunt capacitance value are presented in this article. The influence of parallel capacitance to output voltage is analyzed and verified by experiment as well. The results provide the theoretical basis and guidance for the analysis, design and control of the high voltage resonant converters with parasitic capacitance, which especially presents a good application value for engineering of capacitor charging and electrostatic precipitator supply.

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A novel prototype design for a transformer for high voltage, high frequency, high power use

Cited by 41 publications

References 7 publications

Analysis of a Fifth-Order Resonant Converter for High-Voltage DC Power Supplies

Analysis of a Fifth-Order Resonant Converter for High-Voltage DC Power Supplies

Design of a planar power transformer for high voltage, high frequency use

The influence of parallel capacitor to output voltage in high-frequency ESP power

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