Apparatus Subsection 61: 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-61 |
| Location | lines 11711-11773 |
| Status | candidate |
| Word Count | 254 |
| 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 195 as average saturation curve the curve shown in Fig. 105 as A and as central curve in Fig. 106. Direct-current generators are usually operated at a point of the saturation curve above the bend, that is, at a point where the terminal voltage increases considerably less than proportionally to the field excitation. This is necessary in self-exciting direct- current generators to secure stability. The ratio increase of field excitation total field excitation that is, corresponding increase of voltage total voltage F* de FIG. 105. — Saturation characteristics. is called saturation factor s, and is plotted in Fig. 105. It is the ratio of a small percentage increase in field excitation to a corre- sponding percentage increase in voltage thereby produced. The quantity 1 is called the percentage saturation of theSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Field language
Section titled “Field language”... as A and as central curve in Fig. 106. Direct-current generators are usually operated at a point of the saturation curve above the bend, that is, at a point where the terminal voltage increases considerably less than proportionally to the field excitation. This is necessary in self-exciting direct- current generators to secure stability. The ratio increase of field excitation total field excitation that is, corresponding increase of voltage total voltage F* de FIG. 105. — S ...Chapter-Local Concept Hits
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