Design of high voltage capacitor charger with improved efficiency, power density and reliability

Ryoo, Hong-Je; Jang, Sung-Roc; Jin, Yun–Sik; Kim, J. S.; Ahn, Suk-Ho; Gong, Ji-Woong; Lee, B. H.; Kim, D. H.

doi:10.1109/tdei.2013.6571420

Cited by 32 publications

(5 citation statements)

References 22 publications

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“…High frequency resonant DC-DC converters, which can reduce the switching losses and the system volume, are used more and more widely in high voltage applications [1], [2]. The HFHV transformers are the most challenging and essential components for those converters.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Parasitic Capacitance of High Frequency and High Voltage Transformers of Multi-Section Windings

Deng

Wang

et al. 2020

IEEE Access

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Resonant converters are widely used in high voltage applications thanks to the soft switching technologies. The high frequency and high voltage (HFHV) transformer is the most complicated and important part to boost the voltage by tens or hundreds of times, and the parasitic capacitance of the transformers is critical to the performances of resonant converters. To reduce the parasitic capacitance, the multi-section winding technique is usually employed in HFHV transformers. However, the parasitic capacitance values calculated by the classical methods are not consistent with the experimental results of HFHV transformers, and they are usually designed and optimized with low efficiency. This paper proposes a new analytic method for calculating the parasitic capacitance of HFHV transformers of multi-section windings, which is verified with good accuracy by experimental results.

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Section: Introductionmentioning

confidence: 99%

“…For an instance, the LC converters ( Fig. 1 (a)) are preferred by the chargers of high voltage capacitor banks [2], [7]- [11] because of the characteristics of constant output…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Parasitic Capacitance of High Frequency and High Voltage Transformers of Multi-Section Windings

Deng

Wang

et al. 2020

IEEE Access

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“…However, there is a large circulating current in the converter, which causes switching conduction loss and reduces converter efficiency. The inductor–capacitor–capacitor (LCC) RC is analysed and utilised for CCPS in [14–16]. The LCC RC does not inherently behave as a constant current source.…”

Section: Introductionmentioning

confidence: 99%

Development of compact rapid capacitor charging power supply for TMS

Xiong

Wang

Liu

et al. 2020

IET power electron.

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“…Cho et al [5] reported a DC‐link based topology with no need for bulky DC storage capacitor and line inductors. A 30 kW, 12 kV high voltage converter with this way is reported, which has a power density of 0.82 W/cm 3 , an efficiency of 96% and an input power factor of 0.96 [6]. However, there is still a drawback, the THD of the square‐wave‐like input current is about 30%, much higher than the limitation in the standard ‘IEEE‐519 1992’.…”

Section: Introductionmentioning

confidence: 99%

High power factor high power density high voltage converter based on AC link

Liu

Zhang

et al. 2017

IET Power Electronics

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To meet the demand of high efficiency, high power density and good input and output performance for high power high voltage converter, the high frequency AC-link scheme, below resonance mode of LCC resonant circuit and soft-switched control method are combined in the proposed converter. The AC-link scheme can bring good performance at input port with small size, the continuous mode can reduce the peak current value in switches and the conduction loss, soft-switching character can reduce the switching loss. To make the combination applicable in high voltage application, this study introduces a control method including switch commutation, control algorithm and control block diagram. To verify accuracy of control parameters and feasibility of the proposed converter, the simulation and experiment are conducted on a 50 kV, 80 kW prototype. It turns out that the experiment results are in agreement with simulation and theoretically expected results. The experimental results also show that the output voltage ripple is less than 1% at 50 kV, the input power factor is 0.99, the total harmonic distortion of input current is less than 7.5%, the total efficiency is 94.5% and power density is 0.93 W/cm 3 .

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Design of high voltage capacitor charger with improved efficiency, power density and reliability

Cited by 32 publications

References 22 publications

Investigation on the Parasitic Capacitance of High Frequency and High Voltage Transformers of Multi-Section Windings

Investigation on the Parasitic Capacitance of High Frequency and High Voltage Transformers of Multi-Section Windings

Development of compact rapid capacitor charging power supply for TMS

High power factor high power density high voltage converter based on AC link

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