Chapter 9: Synchronous Induction Motor
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Source Metadata
Section titled “Source Metadata”| Field | Value |
|---|---|
| Source | Theory and Calculation of Electric Apparatus |
| Year | 1917 |
| Section ID | theory-calculation-electric-apparatus-chapter-08 |
| Location | lines 14466-14550 |
| Status | candidate |
| Word Count | 646 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER IX SYNCHRONOUS INDUCTION MOTOR 97. The typical induction motor consists of one or a number df primary circuits acting upon an armature movable thereto, which contains a number of closed secondary circuits, displaced from each other in space so as to offer a resultant closed secondary circuit in any direction and at any position of the armature or secondary, with regards to the primary system. In consequence thereof the induction motor can be considered as a transformer, having to each primary circuit a corresponding secondary cir- cuit— a secondary coil, moving out of the field of the primary coil,* being replaced by another secondary coil moving into the field. In such a motor the torque is zero a) synchronism, positive below, and negative above, synchronism. If, however, the movable armature contains one closed cir-Source-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Impedance / reactance
Section titled “Impedance / reactance”... he secondary circuit, corresponding to a primary circuit, varies from short-circuit at coincidence of the axis of the arma- ture coil with the axis of the primary coil, to open-circuit in quadrature therewith, with the periodicity of the armature speed. That is, the apparent admittance of the primary circuit varies periodically from open-circuit admittance to the short- circuited transformer admittance. At synchronism such a motor represents an electric circuit of an admittance varying with twice the periodicity of the primary frequency, since twice per ...Radiation / light
Section titled “Radiation / light”... is, the apparent admittance of the primary circuit varies periodically from open-circuit admittance to the short- circuited transformer admittance. At synchronism such a motor represents an electric circuit of an admittance varying with twice the periodicity of the primary frequency, since twice per period the axis of the armature coil and that of the primary coil coincide. A varying admittance is obviously identical in effeel with a varying reluctance, which will be discussed in the chapter on reaction machines. That is, the induction motor with one cl ...Field language
Section titled “Field language”... ection and at any position of the armature or secondary, with regards to the primary system. In consequence thereof the induction motor can be considered as a transformer, having to each primary circuit a corresponding secondary cir- cuit— a secondary coil, moving out of the field of the primary coil,* being replaced by another secondary coil moving into the field. In such a motor the torque is zero a) synchronism, positive below, and negative above, synchronism. If, however, the movable armature contains one closed cir- cuit only, it offers a clo ...Alternating current
Section titled “Alternating current”CHAPTER IX SYNCHRONOUS INDUCTION MOTOR 97. The typical induction motor consists of one or a number df primary circuits acting upon an armature movable thereto, which contains a number of closed secondary circuits, displaced from each other in space so as to offer a resultant closed secondary circuit in any direction and at any position of the armature or secondary, with regards to the primary sys ...Chapter-Local Concept Hits
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Impedance / reactance: Translate historical opposition terms into modern impedance, admittance, conductance, susceptance, and complex-plane notation.
- 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.
- 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
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