| 摘要 |
PURPOSE:To allow the speed of a motor to accurately follow up the speed of a rotational shaft by comparing a set pulse signal with the binary state of a rotation pulse signal to vary an energization signal. CONSTITUTION:A rotating speed pulse signal PS from a rotor speed detecting sensor 1 which constructs set signal generating means and a pulse signal PM in response to the rotating speed of a drive motor 3 of a speed indicator 2 are converted by waveform shapers 401A, 401B and one shot circuits 402A, 402B to a set pulse signal fS of the prescribed pulse width and a rotary pulse signal fM, respectively. A logic circuit 403 outputs a control signal H in response to the binary states of the signal fS and the signal fM, and an integrator 404 supplies an energization signal TC in response to the control signal H through an amplifier 405 to the motor 3. |
