| 摘要 |
PURPOSE:To smoothly switch from coasting running operation of a motor and from the coasting running operation to normal operation of the motor by providing a coasting function in a thyristor Leonard unit or an inverter. CONSTITUTION:When a coasting running command C is switched from presence to absence, a speed reference signal A is inputted from a controller 1 from the second analog switch 3 to an acceleration/deceleration limiter 4 instead of a speed feedback signal B. Then, the limiter 4 starts proportional integration with the free running speed of a motor as an initial value, varies a real speed reference signal D to a lamp state until it is set by the speed reference signal A of the controller 1, and smoothly switches the command C from the presence to the absence. |
