Synchronism Concordance
Synchronism
Section titled “Synchronism”Concordance status: generated from processed OCR/PDF text. Treat these as source-location aids until each passage is checked against the scan.
2261 hits
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12 sources
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163 sections
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Matched Aliases
Section titled “Matched Aliases”Synchronism, synchronising, synchronism, synchronizing, synchronous
Source Distribution
Section titled “Source Distribution”| Source | Hits | Sections |
|---|---|---|
| Theory and Calculation of Electric Apparatus | 732 | 21 |
| Theoretical Elements of Electrical Engineering | 408 | 55 |
| Theory and Calculation of Alternating Current Phenomena | 300 | 21 |
| Investigation of Some Trouble in the Generating System of the Commonwealth Edison Co. | 245 | 4 |
| Theory and Calculation of Alternating Current Phenomena | 233 | 17 |
| Theory and Calculation of Alternating Current Phenomena | 135 | 15 |
| Theory and Calculation of Electric Circuits | 96 | 6 |
| General Lectures on Electrical Engineering | 54 | 9 |
| Theory and Calculation of Transient Electric Phenomena and Oscillations | 21 | 6 |
| Elementary Lectures on Electric Discharges, Waves and Impulses, and Other Transients | 16 | 3 |
| Elementary Lectures on Electric Discharges, Waves and Impulses, and Other Transients | 12 | 2 |
| Engineering Mathematics: A Series of Lectures Delivered at Union College | 9 | 4 |
Section Hits
Section titled “Section Hits”Representative Source Snippets
Section titled “Representative Source Snippets”Chapter 4: Induction Motor With Secondary Excitation - 156 hit(s)
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CHAPTER IV INDUCTION MOTOR WITH SECONDARY EXCITATION 38. While in the typical synchronous machine and eommu- tating machine the magnetic field is excited by a direct current, characteristic of the induction machine is, that the magnetic field is excited by an alternating current derived from the alter- nating supply voltage, just as in the alt ...Mathematical Appendix 5: Appendix: Synchronous Operation - 127 hit(s)
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Appendix [[END_PDF_PAGE:27]] [[PDF_PAGE:28]] 22 Report of Charles P. Steinmetz APPENDIX Synchronous Operation A Consider the case of two alternators or groups of alternators such as station sections, which are running in synchronism with each other, that is, have the same frequency f, but are connected together while out of phase with each other by angle 2w ...Chapter 12: Frequency Converter Or General Alternating Current Transformer - 101 hit(s)
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... primary n r thus, if: / = primary frequency, or frequency of impressed e.m.f., sf = secondary frequency; and the e.m.f. generated per secondary turn by the mutual flux has to the e.m.f. generated per primary turn the ratio, «, s = 0 represents synchronous motion of the secondary; s < 0 represents motion above synchronism — driven by external mechanical power, as will be seen; 8 = 1 represents standstill; s > 1 represents backward motion of the secondary, that is, motion against the mechanical force act ...Chapter 24: Synchronous Motor - 95 hit(s)
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CHAPTER XXIV SYNCHRONOUS MOTOR 212. In the chapter on synchronizing alternators we have seen that when an alternator running in synchronism is connected with a system of given voltage, the work done by the alternator can be either positive or negative. In the latter case the alt ...Chapter 16: Induction Motor - 94 hit(s)
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... e frequency as the E.M.Fs. impressed upon the primary, but of a frequency which is the difference between the impressed frequency 238 ALTERNATING-CURRENT PHENOMENA. and the frequency of rotation, or equal to the "slip," that is, the difference between synchronism and speed (in cycles). Hence, if N = frequency of main or primary E.M.F., and s = percentage slip ; sJV = frequency of armature or secondary E.M.F., and (1 — s) N= frequency of rotation of armature. In its reaction upon the primary circuit, however ...Report Record 4: Record of Four Troubles - 69 hit(s)
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... are no power limiting reactors between Fisk B and North- west Station, and the six tie cables between these stations are of very low resistance, the Northwest Station was just as seriously affected as Fisk B, and indeed acted like a part of Fisk B. b) All the synchronous machines on Fisk Street B, and on North- west Station dropped out, and many synchronous machines on Fisk A and Quarry Street: 44 synchronous machines on Fisk B and 18 on Northwest are recorded as shut down. Of 26 machines on Fisk A, 12 dropped out and 14 stay ...Chapter 20: Single-Phase Commutator Motors - 68 hit(s)
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... for single-phase railroading, and as con- stant-speed motors or adjustable-speed motors, where efficient acceleration under heavy torque is necessary. As generators, they would be of advantage for the generation of very low fre- quency, since in this case synchronous machines are uneconom- ical, due to their very low speed, resultant from the low frequency. The direction of rotation of a direct-current motor, whether shunt or series motor, remains the same at a reversal of the im- pressed e.m.f., as in this case the ...Apparatus Section 4: Induction Machines: Induction Generator - 53 hit(s)
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IV. Induction Generator 1. INTRODUCTION 163. In the range of slip from s = 0 to s = 1, that is, from synchronism to standstill, torque, power output, and power input of the induction machine are positive, and the machine thus acts as a motor, as discussed before. Substituting, however, in the equations in paragraph 1 for s values > ...Chapter 23: Review - 52 hit(s)
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... . Comprises an inductor disk of very many teeth, revolving at very high speed between two radial armatures. Used for producing very high frequencies, from 20,000 to 200,000 cycles per second. Amortisseur. — Squirrel-cage winding in the pole faces of the synchronous machine, proposed by Leblanc to oppose the hunt- ing tendency, and extensively used. Amplifier. — 161. An apparatus to intensify telephone and radio telephone currents. High-frequency inductor alternator excited by the telephone current, usually by armat ...Chapter 19: Synchronous Motor - 45 hit(s)
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CHAPTER XIX. SYNCHRONOUS MOTOR. 198. In the chapter on synchronizing alternators we have seen that when an alternator running in synchronism is connected with a system of given E.M.F., the work done by the alternator can be either positive or negative. In the latter case the al ...Chapter 11: Instability Of Circuits: Induction And Syn Chronous Motors - 42 hit(s)
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... zed by the central stations since the early days, and good partial load efficiencies and power-factors secured. 104. The induction motor speed-torque curve thus has on a constant-torque load a stable branch, from the maximum torque point, c. Fig. 102, to synchronism; and an unstable branch, from standstill to the maximum torque point. However, it would be incorrect to ascribe the stability or in- stability to the induction motor-speed curve; but it is the char- acter of the load, the requirement of constant torque, ...Chapter 16: Il - 39 hit(s)
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CHAPTER XVIil. SYNCHRONOUS MOTOR. 177. In the chapter on synchronizing alternators we have seen that when an alternator running in synchronism is connected with a system of given E.M.F., the work done by the alternator can be either positive or negative. In the latter case the al ...Chapter 2: Multiple Squirrel-Cage Induction Motor - 39 hit(s)
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... g is high, and the high-resistance squirrel cage thus carries con- siderable current, gives good torque and torque efficiency, while the low-resistance squirrel cage is ineffective, due to its high reactance at the high armature frequency. At speeds near synchronism, the secondary frequency, being that of slip, is low, and the secondary induced voltage correspondingly low. The high-resistance squirrel cage thus carries little current and gives little torque. In the low-resistance squirrel cage, due to its low reactan ...Chapter 19: Alternating- Current Motors In General - 37 hit(s)
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... s of stator and rotor. In the latter a cycle of rotation exists, and therefrom the tendency of the motor results to lock at a speed giving a definite ratio between the frequency of rotation and the frequency of impressed e.m.f. Such motors, therefore, are synchronous motors. The main types of synchronous motors are as follows: 1. One member supplied with alternating and the other with direct current — polyphase or single-phase synchronous motors, 2. One member excited by alternating current, the other taining a si ...Chapter 15: Synchronous Rectifier - 36 hit(s)
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CHAPTER XV SYNCHRONOUS RECTIFIER Self-compounding Alternators— Self-starting Synchro- nous Motors — Arc Rectifier — Brush and Thomson Houston Arc Machine — Leblanc Panchahuteur — Permutator — Synchronous Converter 138. Rectifiers ffir converting alternating into direct curr ...Report Section 3: Discussion of Recommendations - 34 hit(s)
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... e, but in a large part of the system (Fisk Street B and Northwest) the voltage remained practically zero for about a quarter of an hour after the trouble had been cleared. It appears, as the result of the momentary short circuit the stations had broken out of synchronism with each other and were not able to pull back into synchronism, but kept drifting past each other indefinitely, short circuiting each other and thus keeping the voltage down to practically zero. In these very large power systems, it is essential for the safe ...Chapter 13: Reactance Of Synchronous Machines - 32 hit(s)
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CHAPTER XIII REACTANCE OF SYNCHRONOUS MACHINES 119. The synchronous machine — ^alternating-current generator, synchronous motor or synchronous condenser — consists of an armature containing one or more electric circuits traversed by alternating currents and synchronously revolving relative ...Chapter 18: Surging Of Synchronous Motors - 31 hit(s)
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CHAPTER XVIII SURGING OF SYNCHRONOUS MOTORS 166. In the theory of the synchronous motor the assumption is made that the mechanical output of the motor equals the power developed by it. This is the case only if the motor runs at constant speed. If, however, it accelerates, the power input is ...