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This paper performs the control algorithm of three-level Neutral-point-clamped (3L-NPC) inverter system including the neutral point voltage balance control under unbalanced voltage conditions because the 3L-NPC inverter as compared with a conventional two-level inverter has an inherent problem of neutral point potential variation. The control of 3L-NPC inverter system under unbalanced input supply...
This study investigated an electrochemical method for recycling sodium metaborate (NaBO2) to sodium borohydride (NaBH4). Palladium (Pd), boron-doped diamond (BDD), gold (Au) and platinum (Pt) were used as electrodes. Cyclic voltammetry and chronoamperometry were used to recycle the NaBO2 either to NaBH4 or to an intermediate material for making NaBH4. The electrochemical products were characterized...
The reaction kinetics of drying, pyrolysis and combustion of paper sludge have been determined in a thermogravimetric analyzer (TGA). The effects of heating rate (5-30 K min -1 ) and sample weight (10-50 mg) on drying and pyrolysis of paper sludge have been determined. The kinetic parameters of char combustion are determined at the isothermal conditions (723-1173 K). For dehydration,...
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