Chapter 17: The Alternating-Current Transformer
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Alternating Current Phenomena |
| Year | 1916 |
| Section ID | theory-calculation-alternating-current-phenomena-chapter-17 |
| Location | lines 16521-17716 |
| Status | candidate |
| Word Count | 3982 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 10 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XVII THE ALTERNATING-CURRENT TRANSFORMER 141. The simplest alternating-current apparatus is the trans- former. It consists of a magnetic circuit interlinked with two electric circuits, a primary and a secondary. The primary circuit is excited by an impressed e.m.f., while in the secondary circuit an e.m.f. is generated. Thus, in the primary circuit power is consumed, and in the secondary a corresponding amount of power is produced. Since the same magnetic circuit is interlinked with both electric circuits, the e.m.f. generated per turn must be the same in the secondary as in the primary circuit; hence, the primary generated e.m.f. being approximately equal to the impressed e.m.f., the e.m.fs. at primary and at secondary terminals have approximately the ratio of their respective turns. Since the power produced in the secondary is approximately the same asSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Impedance / reactance
Section titled “Impedance / reactance”... eing interlinked with the other. This magnetic cross-flux is proportional to the current in the electric circuit, or rather, the ampere-turns or m.m.f., and so increases with the increasing load on the transformer, and constitutes what is called the self-inductive or leakage reactance of the trans- former; while the flux surrounding both coils may be con- sidered as mutual inductive reactance. This cross-flux of self-induction does not generate e.m.f. in the secondary circuit, 187 188 ALTERNATING-CURRENT PHENOMENA and is thus, in general, objectiona ...Magnetism
Section titled “Magnetism”CHAPTER XVII THE ALTERNATING-CURRENT TRANSFORMER 141. The simplest alternating-current apparatus is the trans- former. It consists of a magnetic circuit interlinked with two electric circuits, a primary and a secondary. The primary circuit is excited by an impressed e.m.f., while in the secondary circuit an e.m.f. is generated. Thus, in the primary circuit power is consumed, and in the secondary a corresponding amoun ...Alternating current
Section titled “Alternating current”CHAPTER XVII THE ALTERNATING-CURRENT TRANSFORMER 141. The simplest alternating-current apparatus is the trans- former. It consists of a magnetic circuit interlinked with two electric circuits, a primary and a secondary. The primary circuit is excited by an impressed e.m.f., while in the secondary circuit an e ...Radiation / light
Section titled “Radiation / light”... ating magnetic flux of the magnetic circuit surrounding both electric circuits is produced by the combined magnetizing action of the primary and of the secondary current. This magnetic flux is determined by the e.m.f. of the trans- former, by the number of turns, and by the frequency. If $ = maximum magnetic flux, / = frequency, n = number of turns of the coil, the e.m.f. generated in this coil is E = V27r/n$ 10-8 = 4A4fn^ IQ-^ volts; hence, if the e.m.f., frequency, and number of turns are de- termined, the maximum magnetic flux is E108 $ ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Frequency | 5 | seeded |
| Ether | 2 | seeded |
| Light | 1 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| counter e.m.f. | 5 | source-located candidate |
| effective resistance | 5 | source-located candidate |
| ether | 2 | seeded |
Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
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| No chapter-local candidates yet | - | - |
Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
theory-calculation-alternating-current-phenomena-fig-102 | phase (for convenience, as intensities, the effective values are Fig. 102. used throughout), assuming its phase as the downwards vertical; that is, counting the time from the mo… | line 16703 |
theory-calculation-alternating-current-phenomena-fig-103 | Eo Fig. 103. Figs. 103 to 109 give the polar diagram of a transformer having | line 16830 |
theory-calculation-alternating-current-phenomena-fig-104 | ALTERNATING-CURRENT TRANSFORMER 193 Fig. 104. ./ ^^0 | line 16861 |
theory-calculation-alternating-current-phenomena-fig-105 | ./ ^^0 Fig. 105. 13 | line 16867 |
theory-calculation-alternating-current-phenomena-fig-106 | 13 Fig. 106. 194 ALTERNATING-CURRENT PHENOMENA | line 16873 |
theory-calculation-alternating-current-phenomena-fig-107 | 194 ALTERNATING-CURRENT PHENOMENA Fig. 107. Fia. 108. | line 16879 |
theory-calculation-alternating-current-phenomena-fig-113 | gram of Fig. 110, the diagrams for the constant primary im- FiG. 113. pressed e.m.f. (Fig. Ill), and for constant secondary terminal | line 16908 |
theory-calculation-alternating-current-phenomena-fig-114 | Circuit Fig. 114. 152. Separating now the internal secondary impedance from the external secondary impedance, or the impedance of the | line 17408 |
Hidden-Gem Quote Candidates
Section titled “Hidden-Gem Quote Candidates”| Candidate ID | Candidate Passage | Source Location |
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| No chapter-local candidates yet | - | - |
Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
Promotion Checklist
Section titled “Promotion Checklist”- Open the full source text and the scan or raw PDF.
- Verify the chapter boundary and surrounding context.
- Promote exact quotations only after checking the source image.
- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
- Move diagram candidates into the diagram archive only after image extraction, crop verification, and manifest creation.
- Keep Steinmetz wording, modern translation, and ether-field interpretation in separate labeled layers.