| 摘要 |
The present invention is an AC voltage regulator which includes a feed-forward circuit and a differential amplifier which continuously and instantaneously compares the incoming AC voltage to a locally generated, amplitude-stabilized wave form. The local wave form is generated substantially frequency and phase synchronized to the incoming voltage. The output of the differential amplifier drives a power amplifier. The power amplifier output is arranged to continuously buck or boost the incoming AC voltage, depending on the polarity (phase) of the signal from the differential amplifier. The system corrects even subcycle disturbances in the incoming wave form. The present invention is also a method for regulating AC voltage. In this regard, the method includes the steps of deriving a representative wave form corresponding to the incoming AC voltage, generating a reference signal substantially frequency and phase synchronized to the incoming voltage, using a differential amplifier to instantaneously and continuously generate an error signal which is proportional to the difference between the representative wave form and the reference signal, and adding the error signal to the AC voltage to create a regulated AC voltage output.
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