Apparatus Subsection 73: Direct-current Commutating Machines: C. Commutating Machines
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theoretical Elements of Electrical Engineering |
| Year | 1915 |
| Section ID | theoretical-elements-electrical-engineering-section-73 |
| Location | lines 12492-12659 |
| Status | candidate |
| Word Count | 269 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”D. C. COMMUTATING MACHINES 211 constant, curve B to varying armature reaction. It is seen that at a certain definite resistance the voltage becomes zero, and for lower resistance the machine cannot generate but loses its excitation. The variation of the terminal voltage of the shunt generator with the speed at constant field resistance is shown in Fig. 115, at no load as A, and at constant current i as B. These curves are derived from the preceding ones. They show that below a certain speed, which is much higher at load than at no load, the r 50 100 150 200 250 300 350 FIG. 113. — Shunt generator load characteristic. machine cannot generate, and cannot be realized. The lower part of curve B is unstable Series Generator 72. In the series generator theSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Field language
Section titled “Field language”... is seen that at a certain definite resistance the voltage becomes zero, and for lower resistance the machine cannot generate but loses its excitation. The variation of the terminal voltage of the shunt generator with the speed at constant field resistance is shown in Fig. 115, at no load as A, and at constant current i as B. These curves are derived from the preceding ones. They show that below a certain speed, which is much higher at load than at no load, the r 50 ...Chapter-Local Concept Hits
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