Apparatus Section 10: Synchronous Converters: Frequency
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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-88 |
| Location | lines 15811-15892 |
| Status | candidate |
| Word Count | 583 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”X. Frequency 101. While converters can be designed for any frequency, the use of high frequency, as 60 cycles, imposes more severe limita- tions on the design, especially that of the commutator, as to make the high-frequency converter inferior to the low-frequency or 25-cycle converter. The commutator surface moves the distance from brush to next brush, or the commutator pitch, during one-half cycle, that is, 3^50 second with a 25-cycle, J^20 second with a 60-cycle converter. The peripheral speed of the commutator, however, is limited by mechanical, electrical, and thermal considera- tions— centrifugal forces, loss of power by brush friction, and heating caused thereby. The limitation of peripheral speed limits the commutator pitch. Within this pitch must be in- cluded as many commutator segments as necessary to take care of the voltage from brush toSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Radiation / light
Section titled “Radiation / light”X. Frequency 101. While converters can be designed for any frequency, the use of high frequency, as 60 cycles, imposes more severe limita- tions on the design, especially that of the commutator, as to make the high-frequency converter inferior to the l ...Field language
Section titled “Field language”... icient for mechanical strength. With the smaller pitch required for high frequency, this may become impossible, and the limits of conservative design thus may have to be exceeded. In a converter, due to the absence of armature reaction and field distortion, a higher voltage per commutator segment can be 258 ELEMENTS OF ELECTRICAL ENGINEERING . allowed than in a direct-current generator. Assuming 17 volts as limit of conservative design would give for a 600-volt con- verter 3 ...Chapter-Local Concept Hits
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| Frequency | 12 | seeded |
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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.
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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.
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