High power density high voltage power supply based on AC-link

Li, Wei; Liu, Qingxiang; Zhang, Zhengquan

doi:10.1109/sice.2015.7285301

Cited by 1 publication

(1 citation statement)

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“…Voltage compensation topology is added in series resonant circuit to solve the harmonic problem, but it causes the increase of conduction loss [23]. Some efforts have been made for the above resonance mode [29], but the absorbing circuits for six bidirectional switches bring about to the increase of size and complexity.…”

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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Section: Introductionmentioning

confidence: 99%