| 摘要 |
An AC power regulator having a tap changer. The regulator comprises a transformer having taps and thyristors connected with the taps, respectively. The regulator further includes rectifiers, comparators having hysteresis and comparing the output signals from the rectifiers with a reference voltage, a priority processing circuit for selecting the signal to which the highest priority is given out of the output signals from the comparators, firing circuits for firing the thyristors, respectively, and zero voltage-detecting circuits for detecting the voltages between the terminals of the thyristors. When the detected voltages are all nonzero, the conducting thyristor is switched to the next thyristor.
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