| 摘要 |
PROBLEM TO BE SOLVED: To simplify the configuration and increase the reliability and productivity by lessening the number of Hall elements. SOLUTION: The position of a rotor of a motor 60 is detected by a Hall element 10. Out of a U-phase, a V-phase, and a W-phase signal, a U-phase signal U and a reverse signal U1 are generated by the Hall element 10. In response to the U-phase signal and the reverse signal U1, a first amplifier 20 outputs a U-phase signal to an output controller 30. A V-phase signal V having a 120 deg. phase shift with the U-phase signal are generated by a first phase shifter 21 and a reverse signal V1 having a 120 deg. phase shift with the reverse signal U1 are generated by a second phase shifter. In response to the V-phase signal V and the reverse signal V1, a second amplifier 23 generates a V-phase signal and then the U-phase signal and the V-phase signal are combined by the output controller 30 and then the U-phase, the V-phase, and the W-phase signals are supplied to a commutator coil, etc., of the motor 60. |
