| 摘要 |
PURPOSE:To provide a compact driving and controlling apparatus by installing a motor transfer switch for applying AC signals to an ultrasonic motor assigned to drive and also by performing a feedback control in such a manner that the rotating speed of the ultrasonic motor assigned to drive becomes closer to the speed corresponding to a reference voltage. CONSTITUTION:By transfer signals, if a reference voltage switch 25 is connected to the side of a variable resistor 26 and a motor transfer switch 36 is connected to the side of a motor M1, then the amplitude K1 of an elastic wave at that time is detected by a piezoelectric sensor 6, the oscillating frequency of a VCO 29 is converged into a predetermined frequency by a loop control, and the rotating speed of the motor M1 indirectly stabilized. On the other hand, if the switch 25 switch 36 are transferred to the side of motor M2, then the pulses from a rotary encoder 16 are output to a frequency and voltage conversion circuit 22, an oscillating frequency of the VCO 29 is converged to a predetermined frequency by the loop control, and then the rotating speed of the motor M2 is stabilized. |
