Chapter 24: Synchronous Motor
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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-24 |
| Location | lines 25682-29374 |
| Status | candidate |
| Word Count | 8698 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 25 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXIV SYNCHRONOUS MOTOR 212. In the chapter on synchronizing alternators we have seen that when an alternator running in synchronism is connected with a system of given voltage, the work done by the alternator can be either positive or negative. In the latter case the alternator consumes electrical, and consequently produces mechanical, power; that is, runs as a synchronous motor, so that the investi- gation of the synchronous motor is already contained essentially in the equations of parallel-running alternators. Since in the foregoing we have made use mostly of the sym- bolic method, we may in the following, as an example of the graphical method, treat the action of the synchronous motor graphically. Let an alternator of the e.m.f., Ei, be connected as synchron- ous motor with a supply circuit of e.m.f., Eo, bySource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Impedance / reactance
Section titled “Impedance / reactance”... the sym- bolic method, we may in the following, as an example of the graphical method, treat the action of the synchronous motor graphically. Let an alternator of the e.m.f., Ei, be connected as synchron- ous motor with a supply circuit of e.m.f., Eo, by a circuit of the impedance, Z. If £"0 is the e.m.f. impressed upon the motor terminals, Z is the impedance of the motor of generated e.m.f., Ei. If Eq is the e.m.f. at the generator terminals, Z is the impedance of motor and line, including transformers and other intermediate apparatus. If Eq is the ...Dielectricity / capacity
Section titled “Dielectricity / capacity”... motor reduces, unloading increases, the current within the range between 1 and 12. The condition of maximum output is 3, current in phase with impressed e.m.f. Since at constant current the loss is constant, this is at the same time the condition of maximum efficiency; no displacement of phase of the impressed e.m.f., or self-induction of the circuit compensated by the effect of the lead of the motor current. This condition of maximum efficiency of a circuit we have found already in Chapter XL 216. B. £"0 and Ei constant, I variable. Obviously Eq lies ...Field language
Section titled “Field language”... ce of the circuit of (equivalent) resistance, r, and (equivalent) reactance, x = 2 irfL, containing the impressed e.m.f., eo and the counter e.m.f., d, of the syn- chronous motor ^; that is, the e.m.f. generated in the motor arma- ture by its rotation through the (resultant) magnetic field. Let i = current in the circuit (effective values). The mechanical power delivered by the synchronous motor (including friction and core loss) is the electric power consumed by the counter e.m.f., ei; hence ■p = iei cos {i, 6]); (1) thus, cos (t, ei) = -^> lei s ...Alternating current
Section titled “Alternating current”... he investi- gation of the synchronous motor is already contained essentially in the equations of parallel-running alternators. Since in the foregoing we have made use mostly of the sym- bolic method, we may in the following, as an example of the graphical method, treat the action of the synchronous motor graphically. Let an alternator of the e.m.f., Ei, be connected as synchron- ous motor with a supply circuit of e.m.f., Eo, by a circuit of the impedance, Z. If £"0 is the e.m.f. impressed upon the motor terminals, Z is the impedance of the moto ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
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| Light | 6 | seeded |
| Ether | 5 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
|---|---|---|
| counter e.m.f. | 24 | source-located candidate |
| ether | 5 | 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-145 | impedance of the line, and the e.m.f., Es^E = E4, consumed by Fig. 145. the impedance of the generator. Hence, dividing the opposite | line 25805 |
theory-calculation-alternating-current-phenomena-fig-146 | 304 ALTERNATING-CURRENT PHENOMENA Fig. 146. Fig. 147. | line 25830 |
theory-calculation-alternating-current-phenomena-fig-147 | Fig. 146. Fig. 147. SYNCHRONOUS MOTOR | line 25833 |
theory-calculation-alternating-current-phenomena-fig-148 | 305 Fig. 148. Fig. 149. | line 25842 |
theory-calculation-alternating-current-phenomena-fig-149 | Fig. 148. Fig. 149. 20 | line 25845 |
theory-calculation-alternating-current-phenomena-fig-150 | have < EiOE = 90°, Ei = Eo, thus: OEi = EEo = OEo = E^r, Fig. 150. Fig. 151. | line 25963 |
theory-calculation-alternating-current-phenomena-fig-151 | Fig. 150. Fig. 151. that is, EEi = 2 £“0. That means the characteristic curve, Ci, is | line 25966 |
theory-calculation-alternating-current-phenomena-fig-152 | shown in Fig. 151. Fig. 152. If El < Eo, at small Eo — Ei, H can be below the zero line, | line 25997 |
Hidden-Gem Quote Candidates
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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.
- Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
- Complex quantities: Track how Steinmetz preserves geometric rotation and quadrature while translating the same operation into symbolic form.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Dielectricity / capacity: A Wheeler-style reading may emphasize dielectric compression, field stress, and stored potential, but this page treats that as interpretation unless Steinmetz explicitly says it.
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