| 摘要 |
PURPOSE:To shorten the delay time of starting and start a motor more smoothly by a method wherein a current reference, necessary until the motor is started actually, is provided from a starting current reference setting means to a current control circuit as a lamp function separately upon starting the motor while the current reference is switched into another current reference from an original speed control circuit by the actual starting of the motor. CONSTITUTION:When a starting command S is outputted, a starting control circuit 14 outputs a 'H' signal to put a changeover switch 13 ON. An input signal for an operating amplifier 11 is a starting current reference IR1, given from a starting current reference setter 12, and an outputted current reference IR is obtained as a lamp function increased linearly while a motor is started when the current of the motor has arrived at a current reference necessary for the starting of a DC motor. Then, the changeover switch 13 is returned through the starting control circuit 14, the input signal of the operating amplifier 11 is switched into a speed difference (NR-NF) and the title controller is operated in accordance with a control characteristic or a Pl operation type speed control circuit based on a current reference of an output value immediately before switching. |
