Apparatus Section 4: Synchronous Converters: Armature Current and Heating
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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-83 |
| Location | lines 13889-15160 |
| Status | candidate |
| Word Count | 2118 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 1 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”IV. Armature Current and Heating 88. The current in the armature conductors of a converter is the difference between the alternating-current input and the direct-current output. SYNCHRONOUS CONVERTERS 233 In Fig. 127, ai, a2 are two adjacent leads connected with the collector rings DI, D2 in an n-phase converter. The alternating e.m.f. between a\ and a2, and thus the power component of the alternating current in the armature section between a\ and a2, will reach a maximum when this section is midway between the brushes BI and Bz, as shown in Fig. 127. The direct current in every armature coil reverses at the mo- ment when the coil passes under brush BI or B2, and is thus a rec- tangular alternating current as shown in Fig. 128 as 7. At the moment when the powerSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Dielectricity / capacity
Section titled “Dielectricity / capacity”... ection ai a2, and in phase with the rectangular current in the coil d, it becomes more and more out of phase with the rectangular current when passing from coil d toward ai or a2, as shown in Figs. 130 to 133, until the maximum phase displacement between alternating and rectangular current is reached at the alternating leads ai and a2, and is equal to -• li 89. Thus, if E = direct voltage, and I = direct current, in an armature coil displaced by angle T from the position d, ...Alternating current
Section titled “Alternating current”IV. Armature Current and Heating 88. The current in the armature conductors of a converter is the difference between the alternating-current input and the direct-current output. SYNCHRONOUS CONVERTERS 233 In Fig. 127, ai, a2 are two adjacent leads connected with the collector rings DI, D2 in an n-phase converter. The alternating e.m.f. between a\ and a2, and thus the power ...Field language
Section titled “Field language”... cos (30 + 0), r = 1 + 0.889s2 - 1.62 p, oo -phase, n = co : TT = 7m = r = 1 + 0.810 s2 - 1.62 s cos 0 = 1 + 0.810s2 - 1.62 p. Choosing p = 1.04, that is, assuming 4 per cent, loss in friction and windage, core loss and field excitation — the z'2r loss of the armature is not included in p, as it is represented by a drop of direct-current voltage below that corresponding to the alternat- ing voltage, and not by an increase of the alternating current over that co ...Radiation / light
Section titled “Radiation / light”... si' = total current, where s = Vp2 + tf2 is the ratio of total current to the load current, that is, power current corresponding to the direct-current output, and — = tan 6 is the time lag of the supply current; p is a quantity slightly larger than 1, by the losses in the converter, or slightly smaller than 1 in an inverted converter. The actual current in an armature coil displaced in position by angle r from the middle position d between the adjacent collector leads ...Chapter-Local Concept Hits
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theoretical-elements-electrical-engineering-fig-127 | alternating current in the armature section between a\ and a2, will reach a maximum when this section is midway between the brushes BI and Bz, as shown in Fig. 127. The direct c… | line 13908 |
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Modern Engineering Reading Prompts
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Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Dielectricity / capacity: A Wheeler-style reading may emphasize dielectric compression, field stress, and stored potential, but this page treats that as interpretation unless Steinmetz explicitly says it.
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