ALTERNATING-CURRENT POWERED CONVERTER FOR DIRECT-CURRENT RAILWAY TRACTION MOTORS WITH RECUPERATION

摘要

1. Apparatus for feeding an alternating current to a direct current traction device (3) equipped with a balance coil at powering operation and regenerative operation comprising : a completely-controlled thyristor-bridge-converter (2) connected with the pantograph by a reduction transformer (1) a main control block (9) controllable from the control board a powering and a regenerative operation control block (6 or 7) connected to the control electrodes of the thyristors of the converter (2) comprising a data processing block (11) and comprising an excitation control mechanism (10) characterized by a forcedly commutating block (5) the control input whereof is connected to the main control block (9) and which may be connected to the converter (2) during regenerative operation, which commutating block during regenerative operation is connected to an alternating current terminal of the converter (2) through a capacitor (5.3), the thyristors (5.1, 5.2) whereof are equidirectionally connected to those of the converter (2) at the d.c. current side thereof and by a forcedly commutating control block (8) connected to the control electrodes of the thyristors of the forcedly commutating block (5), wherein the outputs of the main control block (9) are connected to an input of the main control, regenerative operation, forcedly commutating and excitation control blocks (6, 7, 8, 10), respectively, and an input of the main control block (9) is connected to an output of the data processing block (11).