Chapter 20: Single-Phase Induction Motors

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Source Metadata

Field	Value
Source	Theory and Calculation of Alternating Current Phenomena
Year	1916
Section ID	`theory-calculation-alternating-current-phenomena-chapter-20`
Location	lines 21538-22301
Status	candidate
Word Count	3441
Equation Candidates In Section	0
Figure Candidates In Section	1
Quote Candidates In Section	0

Opening Source Excerpt

CHAPTER XX SINGLE-PHASE INDUCTION MOTORS 177. The magnetic circuit of the induction motor at or near synchronism consists of two magnetic fluxes superimposed upon each other in quadrature, in time, and in position. In the polyphase motor these fluxes are produced by e.m.fs. displaced in phase. In the monocyclic motor one of the fluxes is due to the primary power circuit, the other to the primary exciting circuit. In the single-phase motor the one flux is produced by the primary circuit, the other by the currents produced in the secondary or armature, which are carried into quadrature posi- tion by the rotation of the armature. In consequence thereof, while in all these motors the magnetic distribution is the same at or near synchronism, and can be represented by a rotating field of uniform intensity and

Source-Located Theme Snippets

Magnetism

CHAPTER XX SINGLE-PHASE INDUCTION MOTORS 177. The magnetic circuit of the induction motor at or near synchronism consists of two magnetic fluxes superimposed upon each other in quadrature, in time, and in position. In the polyphase motor these fluxes are produced by e.m.fs. displaced in phase. In the monocyclic motor one of the flux ...

Impedance / reactance

... ux. This may be produced either by some outside e.m.f., as in the monocyclic starting device, or by displacing the circuits of two or more primary coils from each other, either by mutual induc- tion between the coils — that is, by using one as secondary to the other — or by impedances of different inductance factors connected with the different primary coils. 178. The starting devices of the single-phase induction motor by producing a quadrature magnetic flux can be subdivided into three classes: 1. Phase-Splitting Devices. Two or more primary circuit ...

Dielectricity / capacity

... primary circuits are used, displaced in position from each other, and either in series or in shunt with each other, or in any other way related, as by transformation. The impedances of these circuits are made different from each other as much as possible to produce a phase displacement between them. This can be done either by inserting external impedances in the circuits, as a condenser and a reactive coil, or by making the internal impedances of the motor circuits different, as by making one coil of high and the other of low resistance. 2. Inductive Dev ...

Alternating current

CHAPTER XX SINGLE-PHASE INDUCTION MOTORS 177. The magnetic circuit of the induction motor at or near synchronism consists of two magnetic fluxes superimposed upon each other in quadrature, in time, and in position. In the polyphase motor these fluxes are produced by e.m.fs. displaced in phase. In the monocyclic motor one of the fluxes is due to the primary power circuit, the other to the primary exciting circuit. In the single-phase motor t ...

Chapter-Local Concept Hits

Concept Candidate	Hits In Section	Status
Ether	1	seeded
Frequency	1	seeded

Chapter-Local Glossary Hits

Term Candidate	Hits In Section	Status
counter e.m.f.	2	source-located candidate
ether	1	seeded

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Figure Candidates

Candidate ID	OCR / PDF-Text Candidate	Source Location
`theory-calculation-alternating-current-phenomena-fig-128`	Eo.U.Yj Fig. 128. shading coil is commonly used) is the monocyclic starting device. It consists in producing externally to the motor a system of	line 22028

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Modern Engineering Reading Prompts

Magnetism: Track flux, reluctance, permeability, magnetizing force, and loss language against modern magnetic-circuit terminology.
Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
Complex quantities: Track how Steinmetz preserves geometric rotation and quadrature while translating the same operation into symbolic form.

Ether-Field Interpretive Boundary

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.

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