| 摘要 |
PURPOSE:To prevent commutation failure due to mutual interference between the different armatures of a thyristor motor device by magnetically coupling in reverse polarity between the reactor of a plurality of armature windings of a synchronous motor and the reactor of a variable frequency AC converter between the minimum phase difference armature windings. CONSTITUTION:The reactors 8 and 11, 9 and 12, 10 and 13 connected to two minium phase difference armature windings between the armature windings of respective sets are mutually magnetically coupled in reverse polarity. The induced voltages of these reactors become equal phase and polarity to the reactance drop shown by solid lines 3, 4 in flow charts with respect to the armature current change flown through thermselves, but take plate reverse voltage to the voltage designated by 3, 4 due to the other armature current change. Therefore, when the mutual reactance between the reactors is selected to the vicinity of the leakage reactance of the damper winding, mutual interference can be eliminated therebetween. |
