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This paper presents an energy storage system based on ultra-capacitor to absorbing the regenerating energy of urban rail transit and releasing the energy when the train starts, which can cut down the energy waste. A modular power conversation scheme is proposed to accommodate the application of different electric supply system, with several module connected in series to endure high supply voltage...
A ZVS bi-directional DC-DC converter for high-low voltage conversion is analyzed in this paper. A novel control scheme adopting one port voltage regulated and another port current regulated is proposed to realize the energy conversion in bi-directional freely. A start-up circuit is presented for eliminating the surge current in boost mode. The operation characteristics and parameter design are analyzed...
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