Chapter 21: Regulating Pole Converters
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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-19 |
| Location | lines 30088-31715 |
| Status | candidate |
| Word Count | 6667 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”CHAPTER XXI REGULATING POLE CONVERTERS 230. With a sine wave of alternating voltage, and the com- mutator brushes set at the magnetic neutral, that is, at right angles to the resultant magnetic flux, the direct voltage of a syn- chronous converter is constant at constant impressed alternating voltage. It equals the maximum value of the alternating voltaga between two diametrically opposite points of the commutator, or "diametrical voltage," and the diametrical voltage is twice the voltage between alternating lead and neutral, or star or J voltage of the polyphase system. A change of the direct voltage, at constant, impressed alter- nating voltage (or inversely), can be produced: Either by changing the position angle between the eiuimjuia- tor brushes and the resultant magnetic flux, so that the direct voltage between the brushes is not the maximumSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Magnetism
Section titled “Magnetism”CHAPTER XXI REGULATING POLE CONVERTERS 230. With a sine wave of alternating voltage, and the com- mutator brushes set at the magnetic neutral, that is, at right angles to the resultant magnetic flux, the direct voltage of a syn- chronous converter is constant at constant impressed alternating voltage. It equals the maximum value of the alternating voltaga between two diametrically opposite points of the co ...Field language
Section titled “Field language”... pressed alternating voltage, is in- 424 EL ECTRIC A L A PPA RA T f '8 dependent of the wave shape, and thus run be produced whether the alternating voltage is a sine wave or any other wave. It is obvious that, instead of shifting the brushes on the com- mutator, the magnetic field poles may \k< shifted, in the opposite direction, by the same angle, as shown in Fig. 198, A, B, C. Instead of mechanically shifting the field poles, they can bt shifted electrically, by having each field pole consist of a numUr of sections, and successively reversing the p ...Alternating current
Section titled “Alternating current”... nies are in phase, and a reduction if the higher harmonics are in opposition to the fundamental wave of the dia- metrical or Y voltage. A. Variable Ratio by a Change of the Position Angle between Commutator Brushes and Resultant Magnetic Flux 231. Let, in the commutating maclane shown diagrammatic- ally in Fig. 195, the potential difference, or alternating voltage between one point, a, of the armature winding and the neutral, 0 (that is, the 1' voltage, or half the diametrical voltage) be repre- sented by the sine wave, Fig. 197. This potential di ...Waves / transmission lines
Section titled “Waves / transmission lines”CHAPTER XXI REGULATING POLE CONVERTERS 230. With a sine wave of alternating voltage, and the com- mutator brushes set at the magnetic neutral, that is, at right angles to the resultant magnetic flux, the direct voltage of a syn- chronous converter is constant at constant impressed alternating voltage. It equals the maximum value of th ...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.
- 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.
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Ether-Field Interpretive Boundary
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