voltage corrector

voltage corrector

[′vōl·tij kə‚rek·tər]
(electricity)
Active source of regulated power placed in series with an unregulated supply to sense changes in the output voltage (or current), and to correct for these changes by automatically varying its own output in the opposite direction, thereby maintaining the total output voltage (or current) constant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.