| 摘要 |
<p>PURPOSE:To reduce necessary number of tachometer generators by commonly using the windings of the generators. CONSTITUTION:Windings for outputting signals having phase difference of 90 deg. are provided in a tachometer generator 7. The outputs of the windings are distributed through an oscillation type waveform shaper 2, a direct-coupled waveform shaper 3 and a speed signal distributing level converter 13 to speed collating circuit 4, backward detector 5 and a speedometer 8 of speed collectors 1A- 1C of respective channels, and a speedometer compensator 9 for driving the speedometer 8. The outputs of power sources 6A-6C of collectors 1A-1C are supplied through OR circuits made of diodes 10 to the converter 13 so that, even if a trouble occurs in any channel, no influence is affected to the speed signal.</p> |
