Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 233
ll load 22 to 24 amperes,Field current 0.15 to 1.26 amperes. Speed 200 to 1200 rev. per min., Weight 1200 pounds. MOTORS. 221 A change in magnetic flux can also be accomplished byvarying the reluctance of the magnetic circuit, the fieldcurrent remaining unaltered. The reluctance may be in-creased… … Fig. 136. which depicts a 4-pole machine of the Stow Manufac-turing Company. The field cores are hollow and areprovided with movable iron poles, the positions of whichare simultaneously shifted by means of hand wheel andgears. Large air-gaps are conducive to sparkless com-mutation. (2) The speed of…
Electric machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-716-417.webp)
