| 摘要 |
PURPOSE:To provide an integrated rotational frequency detector having simple device constitution and capable of easily using an output signal as a control signal in respect to an integrated rotational frequency detector for detecting integrated rotational frequency. CONSTITUTION:The integrated rotational frequency detector 100A is constituted of a detection means 102 for detecting the induced voltage of a motor 101, a capacitor 104 for accumulating electric charge and a charging means 103 for charging the capacitor based upon the detected induced voltage. On the other hand, another integrated rotational frequency detector is constituted of a generator for generating voltage corresponding to the rotational frequency of a rotor, a capacitor for accumulating electric charge, a detection means for detecting voltage generated from the generator, and a charging means for charging the capacitor based upon the detected voltage. |
