Apparatus Subsection 40: 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-40 |
| Location | lines 10475-10519 |
| Status | candidate |
| Word Count | 254 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”D. C. COMMUTATING MACHINES 167 36. By the number of poles commutating machines are divided into bipolar and multipolar machines. Bipolar machines are mainly used in small sizes. By the construction of the armature, commutating machines are divided into smooth-core machines and iron-clad or "toothed" armature machines. In the smooth- core machine the armature winding is arranged on the surface of a laminated iron core. In the iron-clad machine the arma- ture winding is sunk into slots. The iron-clad type has the ad- vantage of greater mechanical strength, but the disadvantage of higher self-inductance in commutation, and thus requires high- resistance, carbon or graphite, commutator brushes. The iron- clad type has the advantage of lesser magnetic stray field, due FIG. 78. — Series machine. FIG. 79. — Compound machine. to the shorter gap between fieldSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Field language
Section titled “Field language”... ad- vantage of greater mechanical strength, but the disadvantage of higher self-inductance in commutation, and thus requires high- resistance, carbon or graphite, commutator brushes. The iron- clad type has the advantage of lesser magnetic stray field, due FIG. 78. — Series machine. FIG. 79. — Compound machine. to the shorter gap between field pole and armature iron, and of lesser magnet distortion under load, and thus can with carbon brushes be operated with constant position of bru ...Magnetism
Section titled “Magnetism”... type has the ad- vantage of greater mechanical strength, but the disadvantage of higher self-inductance in commutation, and thus requires high- resistance, carbon or graphite, commutator brushes. The iron- clad type has the advantage of lesser magnetic stray field, due FIG. 78. — Series machine. FIG. 79. — Compound machine. to the shorter gap between field pole and armature iron, and of lesser magnet distortion under load, and thus can with carbon brushes be operated with constant pos ...Chapter-Local Concept Hits
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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.
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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