Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
Dentro del libro
Resultados 1-5 de 29
Página 2
... turn the armature about its axis . Let there be A surface conductors , and let their axes lie on a cylindrical surface of radius r and length l centi- metres , as shown in Fig . 2. The distance between any two adjacent conductors is 2π1 ...
... turn the armature about its axis . Let there be A surface conductors , and let their axes lie on a cylindrical surface of radius r and length l centi- metres , as shown in Fig . 2. The distance between any two adjacent conductors is 2π1 ...
Página 5
... turn the armature , is 1AiN10 - 1 . The whole current , c , passing into or out of π the armature will be twice that in each conductor , so we have 1 t = -AcN10-1 2π . ( 2 ) . We shall find it convenient to express this in inch- pounds ...
... turn the armature , is 1AiN10 - 1 . The whole current , c , passing into or out of π the armature will be twice that in each conductor , so we have 1 t = -AcN10-1 2π . ( 2 ) . We shall find it convenient to express this in inch- pounds ...
Página 7
... turns per bar means four times as many surface conductors as there are bars , and so on . In a drum armature , however , each turn after passing up the armature from the commutator , is brought back on the surface of the armature , and ...
... turns per bar means four times as many surface conductors as there are bars , and so on . In a drum armature , however , each turn after passing up the armature from the commutator , is brought back on the surface of the armature , and ...
Página 8
... turns per bar ; the armature is drum wound . A is 800 . Example 8. — A motor has a ring - wound armature , 120 commutator ... turn a mass of iron in a magnetic field , the amount of the torque depending on the quality of the iron , the ...
... turns per bar ; the armature is drum wound . A is 800 . Example 8. — A motor has a ring - wound armature , 120 commutator ... turn a mass of iron in a magnetic field , the amount of the torque depending on the quality of the iron , the ...
Página 12
... turns per section , mak- ing A = 3,760 . The areas of the curves for 3 , 6 , and 9 amperes in the magnets are as 100 ... turning the armature through 1 Α dn dt of a revolution , then the 12 CH . I THE DIRECT - CURRENT MOTOR.
... turns per section , mak- ing A = 3,760 . The areas of the curves for 3 , 6 , and 9 amperes in the magnets are as 100 ... turning the armature through 1 Α dn dt of a revolution , then the 12 CH . I THE DIRECT - CURRENT MOTOR.
Otras ediciones - Ver todas
Términos y frases comunes
45 amperes accelerating current acceleration curve amperes armature B.Sc brushes cent centimetres CHEMISTRY circuit College Crown 8vo current curve current per motor Diagrams diameter difference distance travelled driving wheel dynamo ELECTRICITY Engineers equal Example expenditure of energy f.p.s. per second feet per second final speed find the induction foot-pounds force factor frictional torque full speed gearing given distance gives greater Hence horizontal horse-power hysteresis Illustrations inch-pounds increase induced tension induction curve induction factor line watts lines of force lines per pole load machine magnets main shaft maximum current mechanical efficiency mechanical watts miles an hour motor shaft obtained pole-tip pounds railway motor reduced represent resistance to motion revolutions per minute revolutions per second rheostat running series-wound motor speed curve starting rheostat Suppose surface conductors terminal tension tion tons torque curve torque loss total torque tractive effort velocity ratio volts weight Woodcuts
Pasajes populares
Página 27 - THE GLACIERS OF THE ALPS : being a Narrative of Excursions and Ascents. An Account of the Origin and Phenomena of Glaciers, and an Exposition of the Physical Principles to which they are related.
Página 16 - OTHER- WORLDS THAN OURS ; The Plurality of Worlds Studied under the Light of Recent Scientific Researches.
Página 28 - Price 3$. 6d. On the STRENGTH of MATERIALS and STRUCTURES : the Strength of Materials as depending on their quality and as ascertained by Testing Apparatus ; the Strength of Structures, as depending on their form and arrangement, and on the materials of which they are composed. By Sir J.
Página 27 - Notes of a Course of Nine Lectures on Light, delivered at the Royal Institution. , By John Tyndall, FRS Crown 8vo. is. sewed, or is. 6d. cloth. Notes of a Course of Seven Lectures on Electrical Phenomena and Theories, delivered at the Royal Institution.
Página 4 - Works by R. LLOYD WHITELEY, FIC, Principal of the Municipal Science School, West Bromwich. CHEMICAL CALCULATIONS. With Explanatory Notes, Problems and Answers, specially adapted for use in Colleges and Science Schools. With a Preface by Professor F. CLOWES, D.Sc. (Lond.), FIC Crown 8vo., 2s.
Página 16 - HALF-HOURS WITH THE STARS: a Plain and Easy Guide to the Knowledge of the Constellations. Showing in 12 Maps the position ot the principal Star-Groups night after night throughout the year. With Introduction and a separate Explanation of each Map. True for every Year.
Página 27 - ESSAYS ON THE FLOATING MATTER OF THE AIR IN RELATION TO PUTREFACTION AND INFECTION.
Página 10 - MARINE BOILER MANAGEMENT AND CONSTRUCTION. Being a Treatise on Boiler Troubles and Repairs, Corrosion, Fuels, and Heat, on the properties of Iron and Steel, on Boiler Mechanics, Workshop Practices, and Boiler Design. By CE STROMEYER, Chief Engineer of the Manchester Steam Users' Association, Member of Council of the Institution of Naval Architects, etc.
Página 28 - INTRODUCTION TO THE STUDY OF CHEMICAL PHILOSOPHY. The Principles of Theoretical and Systematic Chemistry. With 5 Illustrations. Fcp. 8vo., 5s. With ANSWERS to Problems. Fcp. 8vo., y. 6d. PRACTICAL CHEMISTRY. The principles of Qualitative Analysis. Fcp. 8vo. , 1s. 6d. WATTS DICTIONARY OF CHEMISTRY.
Página 20 - Garrod. — WORKS BY SIR ALFRED BARING GARROD, MDFRS A TREATISE ON GOUT AND RHEUMATIC GOUT (RHEUMATOID ARTHRITIS). With 6 Plates, comprising 21 Figures (14 Coloured), and 27 Illustrations engraved on Wood. 8vo.