| 摘要 |
PURPOSE:To perform successively the control of high accuracy and the control of high conformity of the thyristor converter circuit by a method wherein a current feed back control system and a voltage preprograming control system are provided and the systems are change-over. CONSTITUTION:The voltage preprograming signal generator circuit 9 to control the converter circuit by generating a voltage conforming to the prescribed characteristics relation is provided in addition to the current feed back control circuits 4, 5 to control the thyristor converter circuit 1 as to make the difference between a current feed back signal value fed from an induction circuit and the set current value to come to zero. A diverter circuit 7 is made to operate responding to a signal fed from a timing signal generator circuit 8, and an output of the current feed back control circuit is applied to the thyristor converter circuit 1 during the period when the high accuracy is needed, and an output of the voltage preprograming signal generator circuit is applied during the period when the conformity is needed respectively. |
