| 摘要 |
PURPOSE:To provide a control method for drive motors whose current values change by the decrease or increase of their loads. CONSTITUTION:A current detector 7 for detecting the value of current, an inverter 6, and a controller 8 for controlling the inverter 6 by a signal from the current detector 7 are provided in a power circuit 5 for a drive motor 2. When the drive motor 2 is controlled, on the basis of the signal from the current detector 7, its frequency is raised if the signal is lower than a current value set beforehand, whereas, the frequency is lowered if it is higher than the set current value, and the frequency is adjusted so that it may be approximately equal to the set current value. |
