| 摘要 |
PROBLEM TO BE SOLVED: To obtain a controller obtaining a stable operation characteristics by suppressing transient fluctuation at the time of switching FF(feedforward) control and FF/FB(feedforward/feedback) combined control. SOLUTION: After switching from an FF control mode to an FB control mode, a transient current idr1 constricted to a current command id* (current pattern idr) with a prescribed time constant by setting a real current idf0 at the point of the pertinent switching time to be a primary value is supplied for a subtracter 9. After switching from an FB control mode to an FF control mode, a transient voltage ed<fb0> constricted to zero with the prescribed time constant by setting an FB compensation voltage ed<fb1> just before point of the pertient switching time to be the primary value is provided for an adder 21. Consequently, transient fluctuation at the time of switching a control mode is eliminated. |
