| 摘要 |
PROBLEM TO BE SOLVED: To reduce the total stop time of a plurality of electric motors with different loaded states by performing the regeneration damping of an electric motor with the longest stop time in free-run state, performing the power running operation of the other electric motors, and setting a rate to each speed reference so that the power running operation energy becomes larger than the regeneration damping energy. SOLUTION: A control device for driving and controlling electric motors 5 and 6 that belong to the same group of systems for performing operation/stop simultaneously and have different loaded states is composed of a one-way converter device (SR converter) 1 and inverter devices 2 and 3 and is provided with a speed reference generator 12 and an acceleration/deceleration computing element 13. In this case, when stop time in free-run state is longer in the electric motor 6 than the electric motor 5, the deceleration rate of the speed reference is set, the electric motor 5 is set to power running deceleration, the electric motor 6 is subjected to regeneration damping, and the regeneration energy is consumed by the electric motor 5, thus reducing the stop time of the entire group as compared with the case of the stop due to free running. |
