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Feel-soon Kang,Sung-Geun Song 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1
Clamped-double submodule has dc short current protecting function, which can improve safety and stability of HVDC system. However, it needs additional IGBT, diode, and capacitor compared to the conventional half-bridge and full-bridge submodules. Generally, the failure-rate increases in proportion to the number of circuit components. Complex operation of the submodule may increase the failure-rate, so accurate reliability analysis is required to apply CDSM in practical HVDC system. Fault-tree-based reliability analysis is performed to take into account the operational characteristics of CDSM. FTA is possible to analyze the failure-rate more accurately than the prior PCA that considers only the type of parts, the number of parts, and the connection status. By comparing the failure-rate of a CDSM with typical HBSM and FBSM, and analyzing the failure-rate according to the voltage margin of the parts, it provides guidelines for submodule selection under various conditions
AC-PDP Sustain Driver using Bidirectional Switches
Feel-soon Kang 대한전기학회 2011 Journal of Electrical Engineering & Technology Vol.6 No.1
To minimize the cost and power consumption of PDP TV, a practical sustain circuit topology is presented with an address-and-display-period-separated driving scheme. The proposed sustain driver employs bidirectional switches to reduce the number of components. Operational principles and corresponding features are illustrated and compared with the conventional approach. The valuable contributions of the proposed high-performing sustainer has been proven by computer-aided simulations and experiments by using a prototype equipped with 7.5-inch diagonal panel operated at 200 ㎑ switching frequency.
A Highly Efficient AC-PDP Driver Featuring an Energy Recovery Function in Sustaining Mode Operation
Kang, Feel-Soon,Park, Sung-Jun,Kim, Cheul-U The Korean Institute of Electrical Engineers 2002 KIEE International Transactions on Electrical Mach Vol.b2 No.3
A simple sustain driver employing an energy recovery function is proposed as a highly efficient driver of a plasma display panel. The proposed driver uses dual resonance in the sustaining mode operation: a main resonance between an inductor and an external capacitor to produce alternative pulses and a sub-resonance between an inductor and a panel to recover the energy consumption by the capacitive displacement current of the PDP. The operational principle and design procedure of the proposed circuit are presented with theoretical analysis. The operation of the proposed sustain driver is verified through simulation and experiments based on a 7.5-inch-diagonal panel with a 200 KHz operating frequency.