Resonance Concordance
Resonance
Section titled “Resonance”Concordance status: generated from processed OCR/PDF text. Treat these as source-location aids until each passage is checked against the scan.
120 hits
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52 sections
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Matched Aliases
Section titled “Matched Aliases”resonance, resonant
Source Distribution
Section titled “Source Distribution”| Source | Hits | Sections |
|---|---|---|
| Theory and Calculation of Alternating Current Phenomena | 21 | 11 |
| Theory and Calculation of Electric Circuits | 20 | 6 |
| Theory and Calculation of Alternating Current Phenomena | 19 | 10 |
| General Lectures on Electrical Engineering | 15 | 4 |
| Theory and Calculation of Alternating Current Phenomena | 13 | 7 |
| Radiation, Light and Illumination | 8 | 1 |
| Theory and Calculation of Transient Electric Phenomena and Oscillations | 8 | 3 |
| Theory and Calculation of Electric Apparatus | 7 | 3 |
| Engineering Mathematics: A Series of Lectures Delivered at Union College | 3 | 2 |
| Elementary Lectures on Electric Discharges, Waves and Impulses, and Other Transients | 3 | 2 |
| Theoretical Elements of Electrical Engineering | 2 | 2 |
| Elementary Lectures on Electric Discharges, Waves and Impulses, and Other Transients | 1 | 1 |
Section Hits
Section titled “Section Hits”Representative Source Snippets
Section titled “Representative Source Snippets”Lecture 4: Chemical And Physical Effects Of Radiation - 8 hit(s)
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... heat when it ceases to be radiation. Thus all radiations are chemical rays, that is, produce chemical action, if they strike a body which is responsive to them. The chemical action of radiation is specific to its frequency and seems to be some kind of a resonance effect. We may picture to ourselves that the frequency of vibration of a silver atom is that of violet or ultra-violet light, and therefore, when struck by a wave of this frequency, is set in vibration by resonance, just as a tuning fork is set in vibrati ...Lecture 6: Higher Harmonics Of The Generator Wave - 6 hit(s)
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SIXTH LECTURE HIGHER HARMONICS OF THE GENERATOR WAVE mHE open circuit reactance of the transformer is the only reactance high enough to give resonance with the line capacity at fundamental frequency. All other reactances are too low for this. Since, however, the inductive reactance increases and the capacity reactance decreases proportionally to the frequency, the two reactances come nearer together fo ...Lecture 17: Arc Lighting - 6 hit(s)
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... convert their energy into other forms of energy, if the energy is only great enough, we get a high temperature, and thus a high chemical action, merely by the effect of temperature. But we may also get a chemical effect by what probably is some kind of a resonance phenomenon. The particles of a body, atoms or molecules, must have some rate of vibration of their own. If, then, a ray of radiation impinges upon them which is of a frequency of the same magnitude as the inherent rate of vibration of the atom, by resonan ...Chapter 26: Effects Of Higher Harmonics - 6 hit(s)
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... rrent and of potential EFFECTS OF HIGHER HARMONICS 373 difference in the non-inductive part of the circuit more pro- nounced— intensifies the harmonics. Self-induction and capacity in series may cause an increase of voltage due to complete or partial resonance with higher har- monics, and a discrepancy between volt-amperes and watts, without corresponding phase displacement, as will be shown hereafter. 253. In long-distance transmission over lines of noticeable inductive and condensive reactance, rise of volt ...Chapter 14: Constant-Potential Constant-Current Trans Formation - 6 hit(s)
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... 268 ELECTRIC CIRCUITS That is, if in a constant-potential circuit, of impressed e.m.f ., 60, an inductive reactance, Xo, and a condensive reactance, Xe, are connected in series with each other, and if Xe = Xo, (35) that is, the two reactances are in resonance condition with each other, any circuit shunting the capacity reactance is a constant- current circuit, and regardless of the impedance of this circuit, Z = r + jXf the current in the circuit is t = — . Xo 133. Such a combination of two equal reactanc ...Chapter 2: Long-Distance Transmission Line - 6 hit(s)
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... hen once started, even with zero impressed e.m.f., such alternating currents traverse the lines for some time, gradually decreasing in intensity by the energy consumption in the conductor, and so fading out. The condition of this phenomenon of electrical resonance thus is that alternating impulses occur at time intervals equal to the time required for the impulse to travel the length of the line and back; that is, the time of one half wave of impressed e.m.f. is the time required by light to travel twice the length ...Chapter 20: Ri - 5 hit(s)
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... makes the higher harmonics of current and of poten- tial difference in the non-inductive part of the circuit more pronounced — intensifies the harmonics. Self-induction and capacity in series may cause an in- crease of voltage due to complete or partial resonance. 225. In long-distance transmission over lines of notice- able inductance and capacity, rise of voltage due to reso- nance may under circumstances be expected with higher harmonics, as waves of higher frequency, while the funda- mental wave is usually o ...Chapter 23: Effects Of Higher Harmonics - 5 hit(s)
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... makes the higher harmonics of current and of poten- tial difference in the non-inductive part of the circuit more pronounced — intensifies the harmonics. Self-induction and capacity in series may cause an in- crease of voltage due to complete or partial resonance with higher harmonics, and a discrepancy between volt-amperes and watts, without corresponding phase displacement, as will be shown hereafter. 246. In long-distance transmission over lines of notice- able inductance and capacity, rise of voltage due to ...Chapter 10: Instability Of Circuits : The Arc - 5 hit(s)
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... ry simultaneously or in phase, current and voltage in the condenser branch circuit also must be in phase with each other, that is, the Fig. 87. frequency of the oscillation in Fig. 87 is that at which capacity, C, and inductance, L, balance, or is the resonance frequency. If circuit. A, in Fig. 87 is an arc circuit, and the resistance, r, in the shunt circuit small, instability again results, in the same man- ner as discussed before. 93. Another way of looking at the phenomena resulting from a condenser, C, s ...Chapter 9: Circuits Containing Resistance, Inductive Reactance, And Condensive Reactance - 3 hit(s)
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... very much faster than in a non-inductive circuit. Series inductive reactance in a condenser circuit, and series condensive reactance in an inductive circuit, cause a rise of potential. This rise is a maximum for a:o = ± 0.8, or Xq = — X (the condition of resonance), and the e.m.f, reaches the value £■ = 167 volts, or E = Eq— This rise of potential by series reactance continues up to Xo = + 1.6, or, Xo = — 2x, where E = 100 volts again; and for Xq > 1.6 the voltage drops again. At rro = ± 0.8, x = + 0.8, the tot ...Chapter 8: Circuits Containing Resistance, Inductance, And Capacity - 3 hit(s)
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... non-inductive circuit. RESISTANCE, INDUCTANCE, CAPACITY. 65 Series inductance in a condenser circuit, and series con- densance in an inductive circuit, cause a rise of potential. This rise is a maximum for x0 = i .8, or, x0 = — x (the condition of resonance), and the E.M.F. reaches the value, E = 167 volts, or, E = E0z] r. This rise of potential by series reactance continues up to x0 = il.6, or, x0 = — %x, Fig. 42. where E = 100 volts again ; and for x0 > 1.6 the voltage drops again. At x0 = ± -8, x = ...Chapter 4: Induction Motor With Secondary Excitation - 3 hit(s)
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... ds toward zero when approaching synchronism, 86 ELECTRICAL APPARATUS and peculiar speed characteristics result herefrom in such a motor. At a certain slip, s, the condenser current just balances all the reactive lagging currents of the induction motor, resonance may thus be said to exist, and a very large current flows into the motor, and correspondingly large power is produced. Above this "resonance speed," however, the current and thus the power rapidly fall off, and so also below the resonance speed. It must ...Chapter 9: Wave Screens. Even Harmonics - 3 hit(s)
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... the alternating voltage, and the inductance, L, so high as to practically open-circuit the alternating voltage, the separation — of combi- nation — ^is practically complete, and independent of the frequency of the alternating wave. Wave screens based on resonance for a definite frequency by series connection of capacity and inductance, can be used to sepa- rate the ciurent of this frequency from a complex current or voltage wave, such as those given in Figs. 56 to 63, and thus can be used for separation of comp ...Chapter 18: Oscillating Currents - 3 hit(s)
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... oscillating discharge is Z = 0, that is, 1 o / ^ ^ 1^ T \r^C 2aL 2L If r = 0, that is, in a circuit without resistance, we have a = 0, / = /=^j that is, the currents are alternating with no decre- 2 "n"^ LC ment, and the frequency is that of resonance. If ^ty-^-t < 0, that is, r > 2-1/7^, a and / become imaginary; that is, the discharge ceases to be oscillatory. An electrical discharge assumes an oscillating nature only, if r < ^xlp- In the case r = 2 -yj^ we have a = 00 , / = 0; that is, the curren ...Lecture 10: Continual And Cumulative Oscillations - 2 hit(s)
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... l arcing ground oscillation in Figs. 44 and 45, page 98. In Fig. 44, the beginning of the disturbance, apparently a harmonic of the generator wave builds up by the energy supply through a beginning arc, and then builds down again, by being slightly out of resonance with a multiple of the natural frequency of the circuit. In Fig. 45, the arc has completely developed, and one of the harmonics of the generator wave appears as a steady continuous oscillation. Continual and cumulative oscillations naturally are the most ...Chapter 7: Numerical Calculations - 2 hit(s)
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... n general, the frequency of oscillation is assumed as constant, but where, as in cumulative hunting of synchronous machines, the amplitude of the swing reaches large values, an appreciable change of the period must be expected, and where the hunting is a resonance effect with some other periodic motion, as the engine rotation, the change of frequency with increase of amplitude of the oscillation breaks the complete resonance and thereby tends to limit the amplitude of the swing. 177. As example of the application ...Lecture 9: Hunting Of Synchronous Machines - 2 hit(s)
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... or synchronous motors, it is frequently reduced by mak- ing the field excitation unequal, or putting a flywheel on one converter, or belting some other machine to it, or running an induction motor in the same station or in any other way break- ing up the resonance. 122 GENERAL LECTURES 2nd. Several converters hunting against each other in the same substation are frequently steadied by connecting the collector rings with each other, that is, by equalizer connec- tions between converter and transformer or regulat ...Chapter 24: Synchronous Motor - 2 hit(s)
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... pedance, z = v r^ + x^, into a non-inductive circuit. Equation (34) is identical with the equation giving the maximum voltage, Ci, at current, i, which can be produced by shunting the receiving circuit with a condenser; that is, the condition of "complete resonance" of the line, z = V r^ + x^, with current, i. Hence, referring to equation (35), Ci = Co^is the maximum resonance voltage of the line reached when closed by a con- denser of reactance, — x. SYNCHRONOUS MOTOR 323 223. D. Maximum Displacement of Phase ...