| 摘要 |
PURPOSE:To simplify wirings and to reduce the cost by generating current flows to a coil of each phase by a rotation detecting pulse obtained from a sensor section having a factor to be detector and a sensor corresponding to the factor to be detected, thereby deleting the number of components. CONSTITUTION:The prescribed two type physical amounts are alternately provided in a factor 21 to be detected, provided on a rotor in a rotating circumferential direction. Then physical amounts are detected by a sensor section 22, and the detection signals are input to an FG signal and PG signal generator 23. The generator 23 outputs a rotation detection signal of the repetition frequency proportional to the rotating speed of a rotor in phase relative to the physical amount position of the factor 21 and a phase detection signal of the pulse corresponding to the rotating phase of the rotor in phase relative to the physical amount position of the factor 21. The detection signals are supplied to a motor driver circuit 24. |
