| 摘要 |
PROBLEM TO BE SOLVED: To balance deceleration stop of each motor at the occurrence of when power failure. SOLUTION: When power failure is detected by a power failure detector 8, a power failure control part 7 obtains a deceleration correction signal Δf of each motor and is required for maintaining direct current voltage at a constant value by the power regeneration by motor deceleration, by fuzzy reasoning of a fuzzy reasoning part 73 , based on the deviation EV of a current voltage from a set voltage and a deviation change quantity ΔEV. The obtained value is permitted to be an integrated value Kf , integrated by an integrating part 74 , the value K1 is multiplied by frequency instructions f10 -fn0 at a multiplication part 75 , and each motor is decelerated at the same rate. |
