| 摘要 |
PURPOSE:To provide an operation controller for inverters capable of starting the inverters without the necessity of large-capacity memories or high- performance CPUs, suppressing the current of a load motor. CONSTITUTION:Waveform data at each operation frequency are stored beforehand in a memory 12 of an operation controller 9 for controlling a switching element part 7. When the frequency is the same as an operation frequency stored, the switching element part 7 is controlled on the basis of the waveform data. And when it is different from any operation frequency stored, waveform data at a frequency stored being the nearest one, either a lower one or higher, are selected, and the switching element part 7 is controlled by corrected data obtained by changing the rate of time change of its waveform pattern. On this occasion, it is controlled so that the breadth of the change of the operation frequency may increase just after the selection of the waveform data. And after that, it is controlled so that the breadth of the change of the operation frequency may decrease gradually. |
