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Apparatus Subsection 76: Direct-current Commutating Machines: Motors Shunt Motor

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FieldValue
SourceTheoretical Elements of Electrical Engineering
Year1915
Section IDtheoretical-elements-electrical-engineering-section-76
Locationlines 12780-12928
Statuscandidate
Word Count424
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B. MOTORS Shunt Motor 74. Three speed characteristics of the shunt motor at con- stant impressed e.m.f. e are shown in Fig. 116 as A, P, Q, corre- sponding to the points d, p, q of the motor load saturation curve, Fig. 110. Their derivation is as follows: At constant impressed ir,0 1100 WOO £00 (•00 w 50 100 150 200250 300 350 400 450 500 FIG. 119. — Shunt motor speed curves, constant impressed e.m.f. e.m.f. e the field excitation is constant and equals FQ, and at current i the generated e.m.f. must be e — ir. The resultant field excitation is F0 — iqt and corresponding hereto at constant speed the generated e.m.f. taken from saturation curve A in Fig. 110 is e\. Since it must be e — ir, the speed is
... or load saturation curve, Fig. 110. Their derivation is as follows: At constant impressed ir,0 1100 WOO £00 (•00 w 50 100 150 200250 300 350 400 450 500 FIG. 119. — Shunt motor speed curves, constant impressed e.m.f. e.m.f. e the field excitation is constant and equals FQ, and at current i the generated e.m.f. must be e — ir. The resultant field excitation is F0 — iqt and corresponding hereto at constant speed the generated e.m.f. taken from saturation curve A in Fig. ...
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