| 摘要 |
PURPOSE:To perform labor saving of maintenance by converting a speed and a speed set value of an induction motor, and controlling the movable electrode of a water resistor by an AC servomotor. CONSTITUTION:An induction motor (DM) 1 is driven by closing a switch 2. A tachometer generator 5 coupled directly to the DM 1 generates a signal in response to the speed of the DM 1, and a converter 9 which receives the signal converts and outputs a signal usable for controlling. A function converter 10 compares the set value of a speed setter 6 with the input from the converter 9, and outputs a command to a controller 11 according to a preset function in response to the difference of a compared value. An AC servomotor 3b is driven by the command of the controller 11 to control the position of the movable electrode 3a of a water resistor 3, and the speed of the DM 1 is controlled by controlling to regulate a secondary resistance value. |
