direct-current tachometer

direct-current tachometer

[də¦rekt ¦kə·rənt tə′käm·əd·ər]

(electricity)

A dc generator operating with negligible load current and with constant field flux provided by a permanent magnet, so its dc output voltage is proportional to speed.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.