| 摘要 |
PURPOSE:To prevent step-out and to limit the torque to be produced during stoppage, by detecting the load angle of pulse motor and controlling it through control means. CONSTITUTION:The output from pulse oscillator 1 rotates the pulse motor 4 through OR gate and motor drive 2 while simultaneously provided to load angle counter 3, to produce the upper limit signal of load angle counter from the output section 3', while the output from pulse oscillator 5 connected to the motor 4 is fed back through phase pulse isolator 7 to the load angle counter 3 to detect the load angle, and the dummy pulse oscilltor 6 responds to upper and lower limit levels 8, 8' of load angle to produce load angle limiting pulse. Since the load angle is detected and limited to predetermined level, motor torque is limited and the step- out is limited. |
