| 摘要 |
PROBLEM TO BE SOLVED: To realize cost reduction by making it unnecessary to develop or design a special control system when the number of multiplex is changed. SOLUTION: When a three-phase induction motor 5 is driven and controlled by using a plurality (two in figure) of inverters 41, 42 which are connected in parallel, output currents of each of the inverters 41, 42 are divided into a first current component parallel with the motor magnetic flux, a second current component perpendicular to the first current component, and a third current component as the zero-phase component, and each of the current components is independently fed back and controlled by adjusting devices 11, 12, 13. As a result, controls to the inverters 41, 42 are made identical, and a circulation current flowing between them is restrained. |
