Apparatus Subsection 68: Direct-current Commutating Machines: C. Commutating Machines 205
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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-68 |
| Location | lines 12200-12312 |
| Status | candidate |
| Word Count | 434 |
| Equation Candidates In Section | 0 |
| Figure Candidates In Section | 0 |
| Quote Candidates In Section | 0 |
Opening Source Excerpt
Section titled “Opening Source Excerpt”D. C. COMMUTATING MACHINES 205 the current entering over the brush shifts from segment to seg- ment in direct proportion to the motion of the gap between ad- jacent segments across the brush, that is, if the current density is uniform all over the contact surface of the brush. This means that the current i in the short-circuited coil varies from + io to — iQ as a linear function of the time. In this case it can be rep- resented by . . to-2t ^ = ^o — r— J to thus, di = 2ip dt~ to * Substituting this value in the general differential equation gives, after some transformation, -?-*<> + r(to - 20 - 2L = 0; or, e = i I — which gives at the beginning of commutation, t =Source-Located Theme Snippets
Section titled “Source-Located Theme Snippets”Alternating current
Section titled “Alternating current”D. C. COMMUTATING MACHINES 205 the current entering over the brush shifts from segment to seg- ment in direct proportion to the motion of the gap between ad- jacent segments across the brush, that is, if the current density is uniform all over the contact surfac ...Complex quantities
Section titled “Complex quantities”D. C. COMMUTATING MACHINES 205 the current entering over the brush shifts from segment to seg- ment in direct proportion to the motion of the gap between ad- jacent segments across the brush, that is, if the current density is uniform all over the contact surface of the brush. This means that the current i in the short-circuited coil varies from + io to — iQ as a linear function of the time. In ...Chapter-Local Concept Hits
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Modern Engineering Reading Prompts
Section titled “Modern Engineering Reading Prompts”- Alternating current: Compare Steinmetz’s AC language with modern sinusoidal steady-state analysis, RMS quantities, phase, and phasor notation.
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