The practical testing of dynamos and motors (1905)
Smith, Charles Frederick, 1873- · Manchester Scientific Pub. Co · leaf 40
ed, by measurement of the alteration intheir resistance, the following formula may be employed :— r..—r, 100 t h- = r,—1\ •428 100 •238 where t,, h r The upper rise in temperature in degrees Centigrade.,, ,, ,, Fahrenheit, resistance when cold.,, ,, hot. curve on Fig. 7 shows graphically theresult… … 50 200 100 150 Time in minutes.Curve I.—Rise in temperature calculated from resistance. „ II.—Rise in temperature measured on thermometer between magnet limbs.,, III.—Rise in temperature measured on thermometer outside magnet limbs.Fk;. 7.—Temperature Rise in Magnet Winding. placed with their bulbs…
Dynamos · Electric motors
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
