| 摘要 |
<p>PURPOSE:To enable a degree of stability heightened in the system even under a state of extraordinary disturbance, by means of providing a method that changes a time constant of limited differentiating circuit with a stabilized signal applied. CONSTITUTION:A stabilized signal is applied to an automatic voltage regulator AVR through a limited differentiating circuit 1, a phase compensating circuit 2, an amplifier circuit 3 and a limiter circuit 4. A level detector circuit 6, when continued for more than a prescribed length of time a condition that an output of the amplifier circuit 3 be in a level below a set value of the limiter circuit 4 and in a level above a certain set value, makes a time constant selector circuit 5 to work, with a time constant of the limited differentiating circuit 1 selected to that smaller than in a normal time, and a stabilized signal output will be limited to a low level.</p> |
