| 摘要 |
PURPOSE:To drive a stepping motor with a shifting angle divided minutely more than divided conventionally, by arranging a motor coil rated-current excitation circuit and a micro-angle driving circuit. CONSTITUTION:By a rated current controlling sense resistance 4, current flowing to a motor coil 3 is detected, and a semiconductor chopper 11 is pulse-width- modulation-switching-controlled, and constant-current-controlled. By detecting a micro-angle controlling sense resistance 6, a micro-angle driving output element 5 is pulse-width-modulation-switching-controlled, and micro-angle driving current is permitted to flow to the motor coil 3. The micro-angle driving current is permitted to flow to the only one-phase motor coil 3, and rated current is permitted to flow to the residual other-phase motor coil 3, and a stepping motor is micro-angle-driven. |
