| 摘要 |
An active phase angle correction circuit which corrects the phase angle b etween voltage and current in an AC supply varies the capacitive loading of the AC mains to reduce the phase angle to near zero by detecting the phase a ngle, reactively and resistively loading the AC mains in steps until the pha se angle is at a desired level close to zero, and then maintaining or increm entally adjusting the loading. The applied loading may be continuously switc hed in and out at a rate much greater than the mains supply frequency.
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