Transformers for Single and Multiphase Currents: A Treatise on Their Theory, Construction, and UseWhittaker and Company, 1896 - 241 стор. |
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Загальні терміни та фрази
alternating current ampère ampèremeter angle apparatus arc-lamps arrangement assume but-joints cent choking coil clock diagram component connected constant continuous current cooling surface copper current passing determined difference Ditto drop dynamometer E.M.F. curve E.M.F. induced E.M.F. of self-induction eddy currents efficiency electromotive force former frequency full load glow-lamps heat hysteresis loss impressed E.M.F. increase induction instantaneous value insulation iron joint large transformer length load current magnetic flux magnetic leakage magnetic pressure magnetic resistance maximum value measure method millimetres movable coil N₁ number of turns obtain ohmic loss ohmic resistance output phase plates power factor primary and secondary primary coil primary current primary terminals produced reactance reduced represent sample secondary coil secondary current secondary terminals secondary winding shell shown in Fig shunt small transformer smaller sub-station supplied switch terminal pressure thickness trans vector voltage voltmeter volts watt wattmeter whilst wire yoke zero
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Сторінка ii - THE With an Account of the Regimen of the Missouri River and a Description of the Methods used for Founding in that River. By O. Chanute, Chief Engineer, and George Morrison, Assistant Engineer. Illustrated with 5 lithographic views and 12 plates of plans. 4to, cloth $6.00 KAPP, GISBERT, CE Electric Transmission of Energy and its Transformation, Subdivision, and Distribution.
Сторінка ii - This book is one which must of necessity be found in the hands of every one who desires to become acquainted with the best and latest information on the subject- '—Electrical Engineer.
Сторінка 113 - From what has been said above it will be clear that the acquisition of experience, the growth of knowledge, is a unique species of gift and acceptance.
Сторінка ii - Electrical Engineer. A valuable contribution to electrical literature. — Electrical World. Invaluable to the advanced student and dynamo designer.
Сторінка ii - The book is an excellent one in every way, and will, we imagine, long be regarded as the standard treatise on the electrical transmission of energy.'— Mechanical World. ' Although, therefore, the book will be of greater interest to the trained specialist, it has an intrinsic value for the average manufacturer who is willing to give a little study to the subject.'— Textile Reconler. ' Is one of the most generally useful books to the electrical engineer which has been published.
Сторінка 37 - ... (Fig. 6). This reduces the number of coils to be wound and handled and simplifies the insulation between the primary and secondary coils. One of the early investigators, J. Swinburne, introduced the so-called " hedgehog " transformer (Fig. 7) with the intention of reducing the iron loss. He placed the coils upon a core consisting of a bundle of iron wires with their ends spread out like the back of a hedgehog. The lines of force passing through the core must complete their path through air, as...
Сторінка ii - By HA FOSTER, Mem. Am. Inst. EE CENTRAL STATION BOOK - KEEPING AND SUGGESTED FORMS. With an Appendix for Street Railways and numerous Diagrams, los. 6d. By GISBERT KAPP. ALTERNATING CURRENTS of ELECTRICITY, their Generation, Measurement, Distribution, and Application. With 37 Illustrations and 2 Plates.
Сторінка 174 - The apparatus is calibrated by using samples, the hysteresis of which has previously been accurately determined by the ballistic method. Two such standard samples are supplied with the apparatus, together with tables giving the results of the ballistic tests. In testing other samples, a reading is also taken with one of the standards, and the ratio of the readings is taken as the ratio of hysteresis losses between standard and sample.
Сторінка vi - I am well aware that through the omission of many theoretical considerations which were not immediately pertinent to the practical object I had in view, my book, considered as a scientific treatise on transformers, is incomplete.
Сторінка 109 - This condition is as a rule not realizable in practice, because the two circuits must be separately wound and insulated from each other, whereby intervening spaces are produced which admit of the passage of leakage lines.