| 摘要 |
PURPOSE:To shorten the starting time of a motor, by a method wherein a speed control operation and a current control operation are carried out immediately and sequentially upon receiving a starting signal, thereafter a static power converting device is driven. CONSTITUTION:A speed control operation or a current control operation is carried out usually when a timer 11C or another timer 11D is time up. However, when a starting signal is received through a setter and an input signal circuit 13, a CPU11 stops a process, being carried out at present; thereafter, the value of the timer 11D is stored and a current control operation program is carried out. Subsequently, the sampling time of next time is obtained from a stored timer value and an original sampling value, then the speed control operation and the current control operation are carried out on the basis of the next sampling time. |
