Apparatus Subsection 70: Direct-current Commutating Machines: C. Commutating Machines
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theoretical Elements of Electrical Engineering |
| Year | 1915 |
| Section ID | theoretical-elements-electrical-engineering-section-70 |
| Location | lines 12319-12398 |
| Status | candidate |
| Word Count | 442 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 1 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”D. C. COMMUTATING MACHINES 207 and compound machines. Magneto machines and separately excited machines are very similar in their characteristics. In either, the field excitation is of constant, or approximately constant, impressed m.m.f. Magneto machines, however, are little used, except for very small sizes. By the direction of energy transformation, commutating ma- chines are subdivided into generators and motors. Of foremost importance in discussing the different types of machines is the saturation curve or magnetic characteristic; that is, a curve relating terminal voltage at constant speed to ampere-turns per pole field excitation, at open circuit. Such a curve is shown as A in Figs. 109 and 110. It has the same 1 8 9 4 5 6 78 9 19 U 12 13 H 15 16 I? J« W 20 81 FIG. 109. — GeneratorSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Field language
Section titled “Field language”D. C. COMMUTATING MACHINES 207 and compound machines. Magneto machines and separately excited machines are very similar in their characteristics. In either, the field excitation is of constant, or approximately constant, impressed m.m.f. Magneto machines, however, are little used, except for very small sizes. By the direction of energy transformation, commutating ma- chines are subdivided into generators and ...Magnetism
Section titled “Magnetism”... e used, except for very small sizes. By the direction of energy transformation, commutating ma- chines are subdivided into generators and motors. Of foremost importance in discussing the different types of machines is the saturation curve or magnetic characteristic; that is, a curve relating terminal voltage at constant speed to ampere-turns per pole field excitation, at open circuit. Such a curve is shown as A in Figs. 109 and 110. It has the same 1 8 9 4 5 6 ...Alternating current
Section titled “Alternating current”D. C. COMMUTATING MACHINES 207 and compound machines. Magneto machines and separately excited machines are very similar in their characteristics. In either, the field excitation is of constant, or approximately constant, impressed m.m.f. Magneto machines, however, a ...Chapter-Local Concept Hits
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theoretical-elements-electrical-engineering-fig-110 | 1231567 FIG. 110. 9 10 11 12 13 14 .15 16 17 18 19 20 21 | line 12379 |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
- 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.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- 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.
- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
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