| 摘要 |
PURPOSE:To compose a double system only of an AC tachometer generator by F/V converting the frequency signal of the detected output of the generator, and comparing it with a speed voltage signal to detect a malfunction. CONSTITUTION:The output of an AC tachometer generator 2 is converted by a rectifier SR to an analog voltage V1, and supplies as a speed feedback signal to a speed regulator 3. Simultaneously, it is supplied to an F/V converter 8, which outputs a voltage signal V1 converted from a frequency signal. A comparator 8 operates a relay X when the voltage signal V1 becomes a voltage signal V2 or lower to interrupt the supply of power to a motor M. Thus, double system of different physical amounts such as an analog voltage and a digital frequency is composed of one sensor of the generator. |
