| 摘要 |
PURPOSE:To provide motor control at an arbitrary speed without need for additional complicated circuit constitution and exceeding resonance frequency by shifting driving frequency from the initial frequency to prescribed frequency, and the regulating the energy or pulse duration of it frequency signal. CONSTITUTION:When timer interruption is generated by a CPU1, speed data are taken a speed counter 8. In the initial condition just after starting, it is judged if the taken-in speed speed data have reached a target speed, and if not, frequency is shifted in the lower direction by a prescribe amount to make it near to resonance frequency and increase the rotational speed of a motor 6, and if it is acceptable, frequency is fixed to wait for timer interruption. After fixing the frequency, the taken-in speed data and the target speed are compared with each other, and if current speed is higher, pulse duration is decreased and if lower, the pulse duration is increased. It is thus possible to provide driving control with driving frequency locked. |
