Verfahren und schaltung zur umformung elektrischer energie.

摘要

Rail vehicles which can be used in different countries have to derive their motive power from direct-current (1) and alternating-current supply lines (12) of varying supply voltage. A multi-system design is proposed which is suitable for a preset alternating current voltage of, for example, 15 kV and for direct current voltages of 1.5 kV and 3 kV usual in rail operation, with a minimum of critical switching and no motive power losses. The three-phase alternating-current motor windings (11, 11') which each comprise a plurality of part windings (MW1, MW2) are driven in parallel independently of the feeding power system.