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- Title
High power factor high power density high voltage converter based on AC link.
- Authors
Wei Li; Qingxiang Liu; Zhengquan Zhang; Qingfeng Wang
- Abstract
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/cm3.
- Subjects
ELECTRIC potential measurement; CONVERTERS (Electronics); ALGORITHMS; COMPUTER simulation; HARMONIC distortion (Physics)
- Publication
IET Power Electronics (Wiley-Blackwell), 2017, Vol 10, Issue 7, p826
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2016.0225