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Lecture 1: Nature And Origin Of Transients

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FieldValue
SourceElementary Lectures on Electric Discharges, Waves and Impulses, and Other Transients
Year1914
Section IDelectric-discharges-waves-impulses-1914-lecture-01
Locationlines 557-1002
Statuscandidate
Word Count2710
Equation Candidates In Section6
Figure Candidates In Section3
Quote Candidates In Section0
LECTURE I. NATURE AND ORIGIN OF TRANSIENTS. I. Electrical engineering deals with electric energy and its flow, that is, electric power. Two classes of phenomena are met: permanent and transient phenomena. To illustrate: Let G in Fig. 1 be a direct-current generator, which over a circuit A con- nects to a load L, as a number of lamps, etc. In the generator G, the line A, and the load L, a current i flows, and voltages e f . oo,o o Fig. 1. exist, which are constant, or permanent, as long as the conditions of the circuit remain the same. If we connect in some more lights, or disconnect some of the load, we get a different current i\ and possibly different voltages e' ', but again i' and e' are per- manent, that is,
LECTURE I. NATURE AND ORIGIN OF TRANSIENTS. I. Electrical engineering deals with electric energy and its flow, that is, electric power. Two classes of phenomena are met: permanent and transient phenomena. To illustrate: Let G in Fig. 1 be a direct-current generator, which over a circuit A con- nects to a load L, a ...
... disconnect some of the load, we get a different current i\ and possibly different voltages e' ', but again i' and e' are per- manent, that is, remain the same as long as the circuit remains unchanged. Let, however, in Fig. 2, a direct-current generator G be connected to an electrostatic condenser C. Before the switch S is closed, and therefore also in the moment of closing the switch, no current flows in the line A. Immediately after the switch S is closed, current begins to flow over line A into the condenser C, charging this condenser up to the voltage gi ...
... rest transmitted into the load L, where the power is used. The consideration of the electric power NATURE AND ORIGIN OF TRANSIENTS. 3 in generator, line, and load does not represent the entire phenome- non. While electric power flows over the line A, there is a magnetic field surrounding the line conductors, and an electrostatic field issuing from the line conductors. The magnetic field and the electrostatic or " dielectric " field represent stored energy. Thus, during the permanent conditions of the flow of power through the circuit Fig. 3, ther ...
... pated, the rest transmitted into the load L, where the power is used. The consideration of the electric power NATURE AND ORIGIN OF TRANSIENTS. 3 in generator, line, and load does not represent the entire phenome- non. While electric power flows over the line A, there is a magnetic field surrounding the line conductors, and an electrostatic field issuing from the line conductors. The magnetic field and the electrostatic or " dielectric " field represent stored energy. Thus, during the permanent conditions of the flow of power through the circuit Fig. ...
Concept CandidateHits In SectionStatus
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Radiation1seeded
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Candidate IDOCR / PDF-Text CandidateSource Location
electric-discharges-waves-impulses-1914-eq-candidate-0001imposed upon each other. For instance, if in the circuit Fig. 1line 615
electric-discharges-waves-impulses-1914-eq-candidate-0002of the fan motor in instance Fig. 1, a transient period of speedline 703
electric-discharges-waves-impulses-1914-eq-candidate-0003But since -i^ and 4 at h are the same as -r and i at time t, itline 802
electric-discharges-waves-impulses-1914-eq-candidate-00041 dii tan </> 1line 849
electric-discharges-waves-impulses-1914-eq-candidate-0005Since c = ^5line 866
electric-discharges-waves-impulses-1914-eq-candidate-0006An instance of the second case is the pendulum. Fig. 6 : with theline 931
Candidate IDOCR / PDF-Text CandidateSource Location
electric-discharges-waves-impulses-1914-fig-001oo,o o Fig. 1. exist, which are constant, or permanent, as long as the conditionsline 575
electric-discharges-waves-impulses-1914-fig-002]C Fig. 2. Commonly, transient and permanent phenomena are super- imposed upon each other. For instance, if in the circuit Fig. 1line 612
electric-discharges-waves-impulses-1914-fig-003G O Fig. 3. the stored energy has to be supplied from the source of power; that is, for a short time power, in supplying the stored energy, flows notline 661
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  • Transients / damping: Separate the temporary term from the final steady-state term and compare with differential-equation response language.
  • Dielectricity / capacity: Check whether the passage treats capacity, condensers, displacement, or dielectric stress as field storage rather than only circuit algebra.
  • Field language: Read for whether field language is mechanical, geometrical, causal, descriptive, or simply a convenient engineering model.
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  • Waves / transmission lines: Map Steinmetz’s wave and line language onto modern distributed constants, propagation velocity, standing waves, and reflections.
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  • Waves / transmission lines: Standing/traveling wave passages may support richer field interpretations; the page keeps those readings separate from verified Steinmetz wording.
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