Lecture 6: Higher Harmonics Of The Generator Wave
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | General Lectures on Electrical Engineering |
| Year | 1908 |
| Section ID | general-lectures-electrical-engineering-lecture-06 |
| Location | lines 3133-3507 |
| Status | candidate |
| Word Count | 2674 |
| Equation Candidates In Section | 7 |
| Figure Candidates In Section | 1 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”SIXTH LECTURE HIGHER HARMONICS OF THE GENERATOR WAVE mHE open circuit reactance of the transformer is the only reactance high enough to give resonance with the line capacity at fundamental frequency. All other reactances are too low for this. Since, however, the inductive reactance increases and the capacity reactance decreases proportionally to the frequency, the two reactances come nearer together for higher frequency; that is, for the higher harmonics of the generator wave, and for some of the higher harmonics of the generator wave resonance rise of voltage so may occur between the line capacity and the circuit inductance. The origin and existence of higher harmonics therefore bears investigation in transformers, transmlission lines and cable systems. ORIGIN OF HIGHER HARMONICS Higher harmonics may originate in synchronous machines, as generators, synchronous motors and converters, and inSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”SIXTH LECTURE HIGHER HARMONICS OF THE GENERATOR WAVE mHE open circuit reactance of the transformer is the only reactance high enough to give resonance with the line capacity at fundamental frequency. All other reactances are too low for this. Since, however, the inductive reactance increases and the capacity reactance decreases proportionally to the frequency, the two reactances come nearer together for higher frequency; that is, for the higher harmonics of the generat ...Waves / transmission lines
Section titled “Waves / transmission lines”SIXTH LECTURE HIGHER HARMONICS OF THE GENERATOR WAVE mHE open circuit reactance of the transformer is the only reactance high enough to give resonance with the line capacity at fundamental frequency. All other reactances are too low for this. Since, however, the inductive reactance increases and the capacity reactance decre ...Magnetism
Section titled “Magnetism”... CTURES short circuit currents, due to the constant potential character, and is therefore dangerous. HIGHER HARMONICS OF SYNCHRONOUS MACHINES In synchronous machines, as alternating current genera- tors, the higher harmonics are : At No Load I St. The distribution of magnetism in the air gap depends on the shape of the field poles; it is not a sine wave; neither is the e. m. f . induced by it in an armature a sine wave. Since there are a number of conductors in series on the armature, the voltage wave is more evened out than that of a single con ...Impedance / reactance
Section titled “Impedance / reactance”SIXTH LECTURE HIGHER HARMONICS OF THE GENERATOR WAVE mHE open circuit reactance of the transformer is the only reactance high enough to give resonance with the line capacity at fundamental frequency. All other reactances are too low for this. Since, however, the inductive reactance increases and the capacity reactance decreases proportionally to the fr ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
|---|---|---|
| Frequency | 27 | seeded |
| Ether | 3 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
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| ether | 3 | seeded |
Equation Candidates
Section titled “Equation Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
general-lectures-electrical-engineering-eq-candidate-0069 | 3rd. The armature reaction of a single-phase machine | line 3206 |
general-lectures-electrical-engineering-eq-candidate-0070 | The resultant armature reaction of a pol3rphase machine | line 3210 |
general-lectures-electrical-engineering-eq-candidate-0071 | If m == number of phases, the higher harmonics : 2m — i | line 3222 |
general-lectures-electrical-engineering-eq-candidate-0072 | 4th. The terminal voltage under load is the resultant of | line 3225 |
general-lectures-electrical-engineering-eq-candidate-0073 | third harmonic of e. m. f . of 3 x 20 = 60% ; the e. m. f. being | line 3282 |
general-lectures-electrical-engineering-eq-candidate-0074 | of a sine wave by 50% and more, thus giving high insulation | line 3299 |
general-lectures-electrical-engineering-eq-candidate-0075 | and their third harmonics are 3 x 120° = 360° apart, that is, in | line 3305 |
Figure Candidates
Section titled “Figure Candidates”| Candidate ID | OCR / PDF-Text Candidate | Source Location |
|---|---|---|
general-lectures-electrical-engineering-fig-023 | saturation. Fig. 23. In a transformer, e. m. f. and exciting current therefore | line 3268 |
Hidden-Gem Quote Candidates
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| No chapter-local candidates yet | - | - |
Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- 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.
- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- 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.
- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Field language: Field-pressure or field-gradient interpretations can be explored here only after the explicit source passage and modern engineering translation are kept distinct.
Promotion Checklist
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- Verify the chapter boundary and surrounding context.
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- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
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