Chapter 16: Il
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Alternating Current Phenomena |
| Year | 1897 |
| Section ID | theory-calculation-alternating-current-phenomena-1897-chapter-18 |
| Location | lines 19346-21338 |
| Status | candidate |
| Word Count | 5865 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 11 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XVIil. SYNCHRONOUS MOTOR. 177. In the chapter on synchronizing alternators we have seen that when an alternator running in synchronism is connected with a system of given E.M.F., 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 investigation 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 symbolic method, we may in the following, as an instance of the graphical method, treat the action of the synchronous motor diagrammatically. Let an alternator of the E.M.F., E^, be connected as synchronous motor w^ith a supply circuit of E.M.F., E^y by a circuitSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Impedance / reactance
Section titled “Impedance / reactance”... he symbolic method, we may in the following, as an instance of the graphical method, treat the action of the synchronous motor diagrammatically. Let an alternator of the E.M.F., E^, be connected as synchronous motor w^ith a supply circuit of E.M.F., E^y by a circuit of the impedance Z, If E^ is the E.M.F. impressed upon the motor termi- nals, Z is the impedance of the motor of induced E.M.F., E^. If E^ is the E.M.F. at the generator terminals, Z is the impedance of motor and line, including transformers and other intermediate apparatus. If E^ is the i ...Dielectricity / capacity
Section titled “Dielectricity / capacity”... or 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 max- imum efficiency : no displacement of phase of the impressed 2iW A/. TKHA-A rti\G-CURRE.VT P//F..VO.VKXA. [| 181 Iv.M.I"'., or Kclf-induction of the circuit compensated by the effect of the lead of the motor current. This condition of iiiiiximum t-fficiency of a circuit we have found already in Chapte ...Field language
Section titled “Field language”... impedance of the circuit of (equivalent) resistance r and (equivalent) reactance x = 2irJVZ, containing the impressed E.M.F. e^* and the counter E.M.F. tTi of the syn- chronous motor; that is, the E.M F. induced in the motor arma- ture by its rotation through the (resultant) magnetic field. Let / = 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 C. E.M.F. e^; hence — / = />i cos (/'i ^,), (1) thus, — cos (f\ dy) = ^ sm i„(/. ...Alternating current
Section titled “Alternating current”... t the investigation 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 symbolic method, we may in the following, as an instance of the graphical method, treat the action of the synchronous motor diagrammatically. Let an alternator of the E.M.F., E^, be connected as synchronous motor w^ith a supply circuit of E.M.F., E^y by a circuit of the impedance Z, If E^ is the E.M.F. impressed upon the motor termi- nals, Z is the impedance of the ...Chapter-Local Concept Hits
Section titled “Chapter-Local Concept Hits”| Concept Candidate | Hits In Section | Status |
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| Ether | 5 | seeded |
| Light | 5 | seeded |
Chapter-Local Glossary Hits
Section titled “Chapter-Local Glossary Hits”| Term Candidate | Hits In Section | Status |
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| 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-1897-fig-122 | eral, in one of these diagrams shown in Fig. 122 in drawn Fig. 122. lines, current and E.M.F. are in the same direction, repre- senting mechanical work done by the machine as mo… | line 19447 |
theory-calculation-alternating-current-phenomena-1897-fig-124 | tor diagram in dotted line. Fig. 124. As seen, for small values of E^ the potential drops in the alternator and in the line. For the value of E^ = Eq | line 19519 |
theory-calculation-alternating-current-phenomena-1897-fig-125 | \ X Fig. 125. 180. A. — Constant impressed E.M.F, E^y constant current | line 19555 |
theory-calculation-alternating-current-phenomena-1897-fig-128 | In the first case, Ey^ = E^ (Fig. 127), we see that at Fig. 128. very small curren^, that is very small OE, the current / | line 19688 |
theory-calculation-alternating-current-phenomena-1897-fig-129 | the current can never become zero like in the first case^ Fig. 129. El = E^y but has a minimum value corresponding to the | line 19721 |
theory-calculation-alternating-current-phenomena-1897-fig-130 | :^ Fig. 130. El = Eq at Ei^y and then increases beyond Eq, The cur- | line 19816 |
theory-calculation-alternating-current-phenomena-1897-fig-131 | in Chapter IX. Fig. 131. 183. D. E^ =^ constant ; P ^ constant. | line 19857 |
theory-calculation-alternating-current-phenomena-1897-fig-132 | 8/lti.7 Fig. 132. can be transmitted by the same current / with two different induced RM.Fs. E^ of the motor; one, OEi = EEq small, | line 19949 |
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.
- 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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