| 摘要 |
FIELD: transport engineering; electrified vehicles supplied from DC contact system at pulsed voltage control in traction motors. SUBSTANCE: converter has LC-filter with reactor, first and second filter capacitor connected in series between converter supply outputs, first and second pulse interrupters connected between outputs of LC-filter and corresponding outputs for connecting the load and made in form of four-arm thyristor bridges with switching capacitors in diagonally opposite pair of terminals of bridge, first group of even number of isolating diodes coupled through middle output with common output of filter capacitors of LC-filter, and unit to control pulse interrupter thyristors. Second group of even number of isolating diodes is introduced into converter which is coupled through middle output with common output of filter capacitors of LC-filter. Extreme outputs of first and second diode groups are connected, correspondingly, with first and second ac outputs of pulse interrupters. Such connection of zero diodes provides uniform current load on semiconductor devices, reduces change-over frequency and power losses in converter. EFFECT: reduced power losses. |
