| 摘要 |
A frequency controlled high-voltage electric drive comprises a control unit, a multiple-winding transformer, the primary winding of which is connected to high voltage network, secondary windings made in accordance to “triangle-auto” circuit to provide of a phase shift of the converted voltage feed power units “rectifier-inverter”, which are series connected by output terminals in every phase, quantity of series connected units and transformer secondary windings is determined by a level of rated output voltage, first output terminals of first connected power units - “rectifier-inverter” of unlike phases are united into common point. A by-pass circuit of every power unit “rectifier-inverter” is performed on the base of in series connected IGBT-modules with reverse diodes, between second terminals of fuses of unlike phases of every power unit three non-linear excess-voltage suppressor are connected. |
