| 摘要 |
FIELD: railway transport. ^ SUBSTANCE: proposed railway car electric system contains three-phase synchronous inductor-type generator which carries main three-phase "start" connected stator winding and additional single-phase winding with mid-point tap. Main three-phase stator winding is connected by three-leads through rectifier to car circuit, and additional winding is connected by three leads through magnetic amplifier and of rectifiers to storage battery. Three stator winding, namely, shunt field winding, series field winding and antishunt field winding, are connected to car circuit. Antishunt winding contains relay connected to outputs of first rectifier, to one input of which end of one phase of main stator winding is connected, and to second input, end of other phase of main stator winding is connected. Primary winding of booster transformer is connected to phase leads of stator windings. One secondary winding of booster transformer is connected to inputs of second rectifier, one output of which is connected with first output of power capacitor to second output of which thyristor anode is connected. Second output of second rectifier is connected through series-connected limiting resistor and breaking contacts of relay. Cathode of thyristor is connected to marked lead of series field winding. Control circuit consisting of series-connected making contacts of relay and control capacitor connects control electrode of thyristor with second output of power capacitor whose first output is connected with non-marked lead of series field winding. One end of second secondary winding of booster transformer with mid-point tap is connected to first input of third rectifier, and its other end is connected through relay change-over contacts to second input of third rectifier, and mid-point lead is connected through change-over contacts with second input of third rectifier whose first output is connected to one input of car on-bard rectifier whose other input is connected with non-marked lead of shunt field winding, marked lead of the latter being connected with second output of third rectifier. ^ EFFECT: enlarged range of operating speeds. ^ 1 dwg |
