| 摘要 |
PURPOSE:To move a load rapidly and accurately to an objective position by detecting the position of the rotating angle of the output shaft of a motor, counting the electric pulses for detecting the position, interrupting the current of the motor when it becomes a predetermined value, and energizing an attracting salient pole excitation coil. CONSTITUTION:Electric pulses are inputted to a terminal 38a through an AND circuit 46a from a terminal 36b, a counter circuit 38 is counted up. When the counter circuit 37 becomes zero with the revolution of the motor (not shown), an enable signal is inputted to a terminal 39a, and attracting salient pole excitation coil (not shown) corresponding to the counting terminal is excited from the counting terminal as desired of a decoder 39. Simultaneously, the output of the terminal 37a serves to invert the flip-flops 40a, 40b to cause the outputs at the terminals 41, 41a to become positive voltage, thereby braking the motor as reverse braking signal. Accordingly, the motor is braked largely with the desired salient pole attracting strength and the reverse braking force. |
