Apparatus Subsection 54: Direct-current Commutating Machines: C. Commutating Machines 187
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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-54 |
| Location | lines 11214-11300 |
| Status | candidate |
| Word Count | 691 |
| 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 187 ampere-turns per pole. Choosing then 8000 ampere-turns per commutating pole F', leaves 2000 ampere-turns as resultant com- mutating m.m.f . at full load, half as much at half load, etc. The resultant m.m.f. of the main field FQ, the armature Fa, and the commutating pole Ff is represented in Fig. 100 by Fz, and the flux produced by it is shown in Fig. 101. As seen, with the com- mutator brushes midway between the field poles, that is, in the center of the commutating pole, a commutating flux proportional to the armature current enters the armature at the brush B and 5', and is cut by the revolving armature during commutation. The use of the commutating pole or interpole thus permits controlling the commutation, with fixed brush position midway betweenSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”... leaves 2000 ampere-turns as resultant com- mutating m.m.f . at full load, half as much at half load, etc. The resultant m.m.f. of the main field FQ, the armature Fa, and the commutating pole Ff is represented in Fig. 100 by Fz, and the flux produced by it is shown in Fig. 101. As seen, with the com- mutator brushes midway between the field poles, that is, in the center of the commutating pole, a commutating flux proportional to the armature current enters the armature at the ...Field language
Section titled “Field language”... MUTATING MACHINES 187 ampere-turns per pole. Choosing then 8000 ampere-turns per commutating pole F', leaves 2000 ampere-turns as resultant com- mutating m.m.f . at full load, half as much at half load, etc. The resultant m.m.f. of the main field FQ, the armature Fa, and the commutating pole Ff is represented in Fig. 100 by Fz, and the flux produced by it is shown in Fig. 101. As seen, with the com- mutator brushes midway between the field poles, that is, in the center of the ...Radiation / light
Section titled “Radiation / light”... wn in Fig. 98. As is seen in Fig. 101, the magnetic flux of the commutating pole is not symmetrical, but the spread of flux is greater at the side of the main pole of the same polarity. As result thereof, the total magnetic flux is slightly increased by the commutating poles; that is, the two halves of the commutating flux on the two sides of the brush do not quite neutralize, and the com- mutating flux thus exerts a slight compounding action, that is, tends to raise the ...Chapter-Local Concept Hits
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| Light | 5 | seeded |
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
- Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- 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.
- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
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