Chapter 19: Induction Generators
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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-19 |
| Location | lines 20446-21537 |
| Status | candidate |
| Word Count | 1524 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 3 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XIX INDUCTION GENERATORS 173. In the foregoing, the range of speed from 5 = 1, stand- still, to s = 0, synchronism, has been discussed. In this range the motor does mechanical work. It consumes mechanical power, that is, acts as generator or as brake outside of this range. For s > 1, backward driving. Pi becomes negative, repre- senting consumption of power, while D remains positive; hence, since the direction of rotation has changed, represents con- sumption of power also. All this power is consumed in the motor, w^hich thus acts as brake. For s < 0, or negative, Pi and D become negative, and the machine becomes an electric generator, converting mechanical into electric energy. The calculation of the induction generator at constant fre- quency, that is, at a speed increasing withSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”... its magnetic field. When operating in parallel with synchronous alternating cur- rent generators, the induction generator obviously takes its leading exciting current from the synchronous alternator, which thus carries a lagging wattless current. 175. To generate constant frequency, the speed of the in- duction generator must increase with the load. Inversely, when driven at constant speed, with increasing load on the induction generator, the frequency of the current generated thereby decreases. Thus, when calculating the characteristic curves of the ...Impedance / reactance
Section titled “Impedance / reactance”... calculating the characteristic curves of the constant-speed induction generator, due regard has to be taken of the decrease of frequency with increase of load, or what may be called the slip of frequency, s. Let, in an induction generator, Yo = go — jho = primary exciting admittance, Zo = To -\- jxo = primary self-inductive impedance, Zi = ri + jxi = secondary self-inductive impedance, reduced to primary, all these quantities being reduced to the frequency of synchronism with the speed of the machine, /. Let e = generated em.f., reduced to full fre ...Magnetism
Section titled “Magnetism”... uires that 237 238 ALTERNATING-CURRENT PHENOMENA the power-factor either of the external circuit or of the induction generator varies with the voltage, so as to permit the generator and the external circuit to adjust themselves to equality of power-factor. Beyond magnetic saturation the power-factor decreases; that is, the lead of current increases in the induction machine. Thus, when connected to an external circuit of constant power- factor the induction generator will either not generate at all, if its power-factor is lower than that of th ...Alternating current
Section titled “Alternating current”CHAPTER XIX INDUCTION GENERATORS 173. In the foregoing, the range of speed from 5 = 1, stand- still, to s = 0, synchronism, has been discussed. In this range the motor does mechanical work. It consumes mechanical power, that is, acts as generator or as brake outside of this range. For s > 1, backward driving. Pi becomes negative, repre- senting consumption of power, while D remains positive; hence, since the direction of rotation has changed, represents con- sumption of power also. All this power is co ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
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| Frequency | 13 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
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| counter e.m.f. | 3 | source-located candidate |
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-125 | KX) Fig. 125. voltage will rise until by magnetic saturation in the induction generator its power-factor has fallen to equality with that of | line 20763 |
theory-calculation-alternating-current-phenomena-fig-126 | )00 Fig. 126. the efficiency. | line 21111 |
theory-calculation-alternating-current-phenomena-fig-127 | 0 Fig. 127. and the terminal voltage at the synchronous motor, | line 21509 |
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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.
- 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.
- 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.
- 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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