| 摘要 |
PURPOSE:To make the origin return operation at a power-on time unnecessary and to simplify the operation by taking out a position signal from a position detector resolver connected directly the revolving shaft of a motor and a resolver attached to this revolving shaft through an attenuator. CONSTITUTION:An induction motor ACM31 in the side of a machine 2 is controlled by the output of a pulse width modulating inverter 30 in an NC device 1, and a brushless resolver RES32 is attached directly to the revolving shaft of the ACM31, and a brushless RES33 is attached to the revolving shaft of the ACM31 through the attenuator having a gear ratio N. Output signals of RESs 32 and 33 are combined to take out the position signal and a speed signal, and thereby, an absolute position is detected, and this absolute position is supplied as a feedback signal to a photoelectric transducer 35a in the device 1 through a waveform shaping circuit 20, an electrophoto transducer 34b, and an optical fiber. The output of a frequency divider 23 in the device 1 controls RESs 32 and 33 through an electrophoto converting circuit 34a, and optical fiber, a photoelectric converting circuit 35b, and an exciting circuit 24. |
