Chapter 23: Effects Of Higher Harmonics
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Alternating Current Phenomena |
| Year | 1900 |
| Section ID | theory-calculation-alternating-current-phenomena-1900-chapter-23 |
| Location | lines 21983-22448 |
| Status | candidate |
| Word Count | 2389 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXIII. EFFECTS OF HIGHER HARMONICS. 244. To elucidate the variation in the shape of alternat- ing waves caused by various harmonics, in Figs. 175 and Fig. 175. Effect of Triple Harmonic. 176 are shown the wave-forms produced by the superposi- tion of the triple and the quintuple harmonic upon the fundamental sine wave. EFFECTS OF HIGHER HARMONICS. 399 In Fig. 175 is shown the fundamental sine wave and the complex waves produced by the superposition of a triple harmonic of 30 per cent the amplitude of the fundamental, under the relative phase displacements of 0°, 45°, 90°, 135°, and 180°, represented by the equations : sin ft sin ft — .3 sin 3 ft sin ft- .3 sin (3/3-45°) sin ft — .3 sin (3 ft — 90°) s'm ft - .3 sin (3Source-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Waves / transmission lines
Section titled “Waves / transmission lines”CHAPTER XXIII. EFFECTS OF HIGHER HARMONICS. 244. To elucidate the variation in the shape of alternat- ing waves caused by various harmonics, in Figs. 175 and Fig. 175. Effect of Triple Harmonic. 176 are shown the wave-forms produced by the superposi- tion of the triple and the quintuple harmonic upon the fundamental sine wave. EFFECTS OF HIGHER HARMONICS. 399 In Fig. 175 is ...Magnetism
Section titled “Magnetism”... given effective current, are increased. In consequence hereof alternators and synchronous motors of ironclad unitooth construction — that is, machines giving waves with pronounced higher harmonics — give with the same number of turns on the armature, and the same mag- netic flux per field pole at the same frequency, a higher output than machines built to produce sine waves. 248. This explains an apparent paradox : If in the three-phase star-connected generator with the magnetic field constructed as shown diagrammatically in Fig. 162, the magnetic ...Dielectricity / capacity
Section titled “Dielectricity / capacity”... le harmonic upon the fundamental sine wave. EFFECTS OF HIGHER HARMONICS. 399 In Fig. 175 is shown the fundamental sine wave and the complex waves produced by the superposition of a triple harmonic of 30 per cent the amplitude of the fundamental, under the relative phase displacements of 0°, 45°, 90°, 135°, and 180°, represented by the equations : sin ft sin ft — .3 sin 3 ft sin ft- .3 sin (3/3-45°) sin ft — .3 sin (3 ft — 90°) s'm ft - .3 sin (3 ft - 135°) sin ft — .3 sin (3/3 — 180°). • As seen, the effect of the triple harmonic is in the fi ...Radiation / light
Section titled “Radiation / light”... Double peak, with sharp zero : sin (3 - .15 sin (30- 180°) - .10 sin 5 /?. Sharp peak with sharp zero : sin {3 — .15 sin 3 0 — .10 sin (5 (3 — 180°). 245. Since the distortion of the wave-shape consists in the superposition of higher harmonics, that is, waves of higher frequency, the phenomena taking place in a circuit 402 ALTERNATING-CURRENT PHENOMENA. supplied by such a wave will be the combined effect of the different waves. Thus in a non-inductive circuit, the current and the potential difference across the different parts of the circuit a ...Chapter-Local Concept Hits
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- 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.
- Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
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- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
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