| 摘要 |
PURPOSE:To increase the degree of selecting freedoms of a speed signal source without increasing the number of terminals in case of integrating by employing as a speed signal the signal of a position detector. CONSTITUTION:The position of a movable element of a motor is detected by position detectors 18-20, and driving transistors 10-15 are sequentially turned on by a conduction switching circuit 17 in response to the outputs. A speed signal amplifier 71 amplifies a signal having a frequency corresponding to the speed of the motor, and a torque command signal generator 83 outputs a signal for increasing or decreasing the torque of the motor in response to its output. A position detection signal processor 36 outputs a signal having a frequency corresponding to the outputs of the detectors 18-20, and the signal is transmitted to the output of the amplifier 71 through a speed signal switching circuit 72 in response to the output of a level discriminator 78 for discriminating the input signal levels of the amplifier 71. |
