Apparatus Section 2: Alternating-current Transformer: Excitation
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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-96 |
| Location | lines 16912-17026 |
| Status | candidate |
| Word Count | 513 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”II. Excitation 112. The primary current i\ is not strictly proportional to the secondary current, i2 by the ratio of transformation, TRANSFORMER Excitation and Iron Losses Vo tage fower factor 50 30 FIG. 153. — Excitation and core loss of transformer. and does not become zero at no load or open circuit, but a small and lagging current ^o remains at no load, which is called the exciting current. It produces the magnetic flux and supplies the losses in the iron, so-called "core loss." Its reactive com- ponent, imj is called the magnetizing current, and is usually greatly distorted in wave shape, while the energy component, 280 ELEMENTS OF ELECTRICAL ENGINEERING ih, does not much differ from a sine wave, and is the hysteresis energy current: /o = ih - Jim- Under load, the primarySource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”... er factor 50 30 FIG. 153. — Excitation and core loss of transformer. and does not become zero at no load or open circuit, but a small and lagging current ^o remains at no load, which is called the exciting current. It produces the magnetic flux and supplies the losses in the iron, so-called "core loss." Its reactive com- ponent, imj is called the magnetizing current, and is usually greatly distorted in wave shape, while the energy component, 280 ELEMENTS OF ELECTRICAL ENGI ...Hysteresis
Section titled “Hysteresis”... Its reactive com- ponent, imj is called the magnetizing current, and is usually greatly distorted in wave shape, while the energy component, 280 ELEMENTS OF ELECTRICAL ENGINEERING ih, does not much differ from a sine wave, and is the hysteresis energy current: /o = ih - Jim- Under load, the primary current then consists of two com- ponents: the load current 7'2 which is the transformed second- ary current 7'2 = — > and the exciting, current IQ. The total «i primary curren ...Waves / transmission lines
Section titled “Waves / transmission lines”... at no load, which is called the exciting current. It produces the magnetic flux and supplies the losses in the iron, so-called "core loss." Its reactive com- ponent, imj is called the magnetizing current, and is usually greatly distorted in wave shape, while the energy component, 280 ELEMENTS OF ELECTRICAL ENGINEERING ih, does not much differ from a sine wave, and is the hysteresis energy current: /o = ih - Jim- Under load, the primary current then consists of two com- po ...Alternating current
Section titled “Alternating current”II. Excitation 112. The primary current i\ is not strictly proportional to the secondary current, i2 by the ratio of transformation, TRANSFORMER Excitation and Iron Losses Vo tage fower factor 50 30 FIG. 153. — Excitation and core loss of transformer. and does not become zero at no load or open circuit, but a small and lagging current ^o remains at no load, which is called the exciting current. It produces the magnetic ...Chapter-Local Concept Hits
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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.
- Hysteresis: Compare the passage with modern magnetic loss, B-H loop area, lag, material memory, and empirical loss laws.
- Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
- 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”- Magnetism: Centrifugal/divergent magnetic-field readings are interpretive overlays, not automatic historical claims.
- Hysteresis: An interpretive reading can treat hysteresis as field lag or memory, but the historical claim must remain Steinmetz’s actual magnetic-loss treatment.
- Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
- 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
Section titled “Promotion Checklist”- Open the full source text and the scan or raw PDF.
- Verify the chapter boundary and surrounding context.
- Promote exact quotations only after checking the source image.
- Move mathematical candidates into canonical equation pages only after formula typography is corrected.
- Move diagram candidates into the diagram archive only after image extraction, crop verification, and manifest creation.
- Keep Steinmetz wording, modern translation, and ether-field interpretation in separate labeled layers.