The practical testing of dynamos and motors (1905)
Smith, Charles Frederick, 1873- · Manchester Scientific Pub. Co · leaf 258
as by Prof. Peukert. Readings were taken every 5 sees. Referring to Fig. 78, Curve III. (normal excitation),speed after 5 sees, was 884 = n^, after 10 sees, speed was 640 = n.,.Hence formula w = K ——-—^ becomes DETERMINATION OF LOSSES. 243 ^ 884- - 640- _ . „„, ^w = K r = 74,3 /1 K , » 884 + 640… … ,.L_ hL. .. ....,-.. ... 10 20 30 40 50 60 70Seconds.Fig. 78.—Retardatxox Curve.s. Curve I.—Machine uuexcited.,, II.—Half-iiovmal excitation.., III.—Xormal excitation. This reading agreed with the average of a number ofsimilar determinations of K. The method of deternmiing points on the other…
Dynamos · Electric motors
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
