Apparatus Introduction 21: Introduction
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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-21 |
| Location | lines 8292-8517 |
| Status | candidate |
| Word Count | 1520 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”INTRODUCTION 1. By the direction of the energy transmitted, electric machines have been divided into generators and motors. By the character of the electric power they have been distinguished as direct- current and as alternating-current apparatus. With the advance of electrical engineering, however, these subdivisions have become unsatisfactory and insufficient. The division into generators and motors is not based on any characteristic feature of the apparatus, and is thus not rational. Practically any electric generator can be used as motor, and conversely, and frequently one and the same machine is used for either purpose. Where a difference is made in the construction, it is either only quantitative, as, for instance, in synchronous motors a higher armature reaction is often used than in synchro- nous generators, or it is in minor features, as direct-current motors usuallySource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”... current apparatus is unsatisfactory, since it includes in the same class apparatus of entirely different character, as the induction motor and the alternating-current generator, or the constant-potential commutating machine and the rectifying arc light machine. Thus the following classification, based on the characteristic features of the apparatus, as adopted by the A. I. E. E. Standard- izing Committee, is used in the following discussion. It refers only to the apparatus transforming bet ...Field language
Section titled “Field language”... n the construction, it is either only quantitative, as, for instance, in synchronous motors a higher armature reaction is often used than in synchro- nous generators, or it is in minor features, as direct-current motors usually have only one field winding, either shunt or series, while in generators frequently a compound field is employed. Further- more, apparatus have been introduced which are neither motors nor generators, as the synchronous machine producing wattless lag- ging or leadi ...Magnetism
Section titled “Magnetism”... the A. I. E. E. Standard- izing Committee, is used in the following discussion. It refers only to the apparatus transforming between electric and electric and between electric and mechanical power. 1st. Commutating machines, consisting of a magnetic field and a closed-coil armature, connected with a multi-segmental commutator. 121 122 ELEMENTS OF ELECTRICAL ENGINEERING 2d. Synchronous machines, consisting of a undirectional mag- netic field and an armature revolving relatively to the ...Alternating current
Section titled “Alternating current”INTRODUCTION 1. By the direction of the energy transmitted, electric machines have been divided into generators and motors. By the character of the electric power they have been distinguished as direct- current and as alternating-current apparatus. With the advance of electrical engineering, however, these subdivision ...Chapter-Local Concept Hits
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| Frequency | 8 | seeded |
| Light | 5 | seeded |
Chapter-Local Glossary Hits
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Radiation / light: Compare the chapter’s radiation vocabulary with modern electromagnetic radiation, spectral frequency, wavelength, absorption, and illumination engineering.
- 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.
- Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
Ether-Field Interpretive Boundary
Section titled “Ether-Field Interpretive Boundary”- Radiation / light: Radiation and wave language can invite ether-field comparison, but source wording, modern radiation theory, and speculative synthesis must stay separated.
- 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.
- 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.
Promotion Checklist
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