Apparatus Section 10: Direct-current Commutating Machines: Compounding
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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-62 |
| Location | lines 11774-11794 |
| Status | candidate |
| Word Count | 135 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”X. Compounding 59. In the direct-current generator the field excitation re- quired to maintain constant terminal voltage has to be increased with the load. A curve giving the field excitation in ampere- turns per pole, as function of the load in amperes, at constant terminal voltage, is called the compounding curve of the machine. The increase of field excitation required with load is due to : 1. The internal resistance of the machine, which consumes e.m.f. proportional to the current, so that the generated e.m.f., and thus the field m.m.f. corresponding thereto, has to be greater under load. If p = resistance drop in the machine as fraction ir of terminal voltage, = — > the generated e.m.f. at load has to be £ e (1 + p), and if ^o= no-load field excitation, andSource-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Field language
Section titled “Field language”X. Compounding 59. In the direct-current generator the field excitation re- quired to maintain constant terminal voltage has to be increased with the load. A curve giving the field excitation in ampere- turns per pole, as function of the load in amperes, at constant terminal voltage, is called the ...Chapter-Local Concept Hits
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