A two-phase servo motor control circuit for the nut-runners employing the tightening torque control method

자동나사체걸기의 토크제어를 위한 AC 2상서보모터 제어회로 설계

A simple hybrid circuit to control the two-phase AC motor of the nut-runners which employ the tightening torque control system is described in this paper. The circuit has emphasis on the low-cost implementation. The circuit constitutes of the V/F converter using a timer IC, the pulse width modulator using the fastening torque signal and the two-phase logic sequencer.