| 摘要 |
PURPOSE:To change the rotating speed of a pulse motor, by controlling counter electromotive voltage value set up across coil terminals when coils of each phase are unenergized. CONSTITUTION:An exciting pulse driver A 1 impresses the pulse equivalent to the output of one phase of a pulse motor. A counter eletromotive voltage control driver A 2 shorts/opens across terminals of a coil L in response to the output(0.1) of a comparator A 3. Partial pressure resistances R 1 and R 2 divide the counter electromotive voltage set up at the coil L. A converter A 4 converts (f/V conversion) the frequency of the pulse signal sent out of pin 14 of a microcomputer Q 1 into the voltage. By switching this output voltage (reference voltage), the counter electromotive voltage is controlled. |
