| 摘要 |
PURPOSE:To reduce positional shift, by changing the action intervals of a position detecting circuit according to the driving condition of a surge motor. CONSTITUTION:The driving circuit of a surge motor 4 is composed of an oscillation circuit 1, a driving waveform combining circuit 2 and the amplifier circuit 3 of this output, a sensor 5 and a position detecting circuit 6 for detecting a stopping position, a detection controlling circuit 7, and a clock shaping circuit 8. If the detection result of the position detecting circuit 6 is normal in specififed frequency, the action intervals of the position detecting circuit 6 are increased by one step with the detection controlling circuit 7, and if the detection result is abnormal, the action intervals of the position detecting circuit 6 are reduced by one step. As this result, an energy-saving device accommodated to the driving condition of the surge motor 4 and with less positional shift can be realized. |
