| 摘要 |
<p>PURPOSE:To suppress a variation in a generator voltage by differentiating a harmonic wave component presented at the voltage and applying it as a control signal to a control system. CONSTITUTION:A harmonic wave detector 20 detects the harmonic wave component of the output voltage waveform of a generator 3 produced by a power transformer 5, such as a third harmonic wave, differentiates the detection signal, and applies it to an amplifier 8. The amplifier 8 calculates a deviation between the set value of a bias setter 9, and the sum result of a voltage deviation input from a comparison calculator 6, a hunting preventive signal input from a hunting preventing circuit, and the detection signal of a harmonic wave detector 20, and outputs it to a gate controller 11. Thus, a control system operates to suppress it at the stage immediately before a generator voltage is abruptly varied, thereby suppressing the variation in the generator voltage.</p> |
