Chapter 6: Alternating Magnetic Flux Distribution
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Transient Electric Phenomena and Oscillations |
| Year | 1909 |
| Section ID | theory-calculation-transient-electric-phenomena-oscillations-chapter-46 |
| Location | lines 23948-24980 |
| Status | candidate |
| Word Count | 2710 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER VI. ALTERNATING MAGNETIC FLUX DISTRIBUTION. 48. As carrier of magnetic flux iron is used, as far as possible, since it has the highest permeability or magnetic conductivity. If the magnetic flux is alternating or otherwise changing rapidly, an e.m.f. is generated by the change of magnetic flux in the iron, and to avoid energy losses and demagnetization by the currents produced by these e.m.fs. the iron has to be subdivided in the direction in which the currents would exist, that is, at right angles to the lines of magnetic force. Hence, alternating magnetic fields and magnetic structures desired to respond very quickly to changes of m.m.f. are built of thin wires or thin iron sheets, that is, are laminated. Since the generated e.m.fs. are proportional to the frequency of the alternating magnetism, the laminationsSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”CHAPTER VI. ALTERNATING MAGNETIC FLUX DISTRIBUTION. 48. As carrier of magnetic flux iron is used, as far as possible, since it has the highest permeability or magnetic conductivity. If the magnetic flux is alternating or otherwise changing rapidly, an e.m.f. is generated by the change of magnetic flux in t ...Radiation / light
Section titled “Radiation / light”... t angles to the lines of magnetic force. Hence, alternating magnetic fields and magnetic structures desired to respond very quickly to changes of m.m.f. are built of thin wires or thin iron sheets, that is, are laminated. Since the generated e.m.fs. are proportional to the frequency of the alternating magnetism, the laminations must be finer the higher the frequency. To fully utilize the magnetic permeability of the iron, it there- fore has to be laminated so as to give, at the impressed frequency, practically uniform magnetic induction throughout its ...Waves / transmission lines
Section titled “Waves / transmission lines”... ), and (24), as ^2Ve+2d + e-*'I + 2cos2d, (25) o CB1 = >e+2^ + £-2^o + 2cos2c/0, (26) (B = and 2 cos 2 (28) 52. Where the thickness of lamination, 2 Z0, or the frequency/, is so great as to give cZ0 a value sufficiently high to make e~cl°, or the reflected wave, negligible compared with the main wave e+cl°, the equations can be simplified by dropping s~cl. In this case the flux density, (B, is very small or practically nothing in the interior, and reaches appreciable values only near the surface. It then is preferable to count the ...Complex quantities
Section titled “Complex quantities”... dl from the center line of the lamination, and 2 10 = the total thickness of the lamination. If then / = the current density in the layer dl, and E = the e.m.f.'per unit length generated in the zone dl by the alternating magnetic flux, we have The magnetic flux density (Bj at the surface I = 10 of the lamination corresponds to the Fig. 92. Alter- jmpresseci or external m.m.f. The' density (B natmg magnetic ,, 77 , ,, fluxdistribution m the zone dl corresponds to the impressed in solid iron. m.m.f. plus the sum of all the m.m.fs. in the zone ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Frequency | 19 | seeded |
| Wave length | 10 | seeded |
| Magnetic permeability | 3 | seeded |
| Light | 1 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
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| wave length | 10 | seeded |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- 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.
- Complex quantities: Track how Steinmetz preserves geometric rotation and quadrature while translating the same operation into symbolic form.
- Transients / damping: Separate the temporary term from the final steady-state term and compare with differential-equation response language.
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.
- Transients / damping: Transient collapse, impulse, and surge behavior can be compared with alternative field language, but only as a clearly marked reading.
Promotion Checklist
Section titled “Promotion Checklist”- Open the full source text and the scan or raw PDF.
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