Direct currents

목차 (Table of Contents)

• CONTENTS
• PREFACE = ⅴ
• CHAPTER Ⅰ INTRODUCTION = 1
• CHAPTER Ⅱ THE ELECTRIC CIRCUIT = 7
• Electrons-Electronic charge-Electric current-Electromotive force-Resistance-Conductance-Ohm's law-Circuit connections-Kirchhoff's laws-Resistance of conductors-Resistance of circuits Leakage current Problems.
• CHAPTER Ⅲ THE MAGNETIC CIRCUIT = 37
• Magnetic flux, lines of force-Magnetomotive force-Reluctance, permeance, permeability-Ohm's law applied to magnetic circuit-Kirchhoff's laws applied to magnetic circuit-Reluctance of magnetic circuits-Leakage flux-Problems.
• CHAPTER Ⅳ THE DIELECTRIC CIRCUIT = 48
• Dielectrics-Condensers-Dielectric flux, lines or tubes of force-Condensance, elastance-Ohm's law applied to dielectric circuits-Kirchhoff's laws applied to dielectric circuits-Elastance or conductance of dielectric circuits-Dielectric leakage flux-Dielectric, magnctic and electric circuits-Problems.
• CHAPTER Ⅴ GENERATION OF VOLTAGE, CURRENT AND FORCE = 58
• Sources of electromotive force-Electromangetic induction-Direction of generated voltage-Fleming's rule-Lenz's law-Instantaneous valucs, wave forms-Problems.
• CHAPTER Ⅵ ELECTRIC POWER ELECTRIC ENERGY = 68
• Electric power-Electric energy-Joule's law-Generator and motor action-Problems.
• CHAPTER Ⅶ SYSTEMS OF UNITS SYMBOLS = 73
• Fundamental and mechanieal units, conversion factors-Electro static or stat systems coulomb's law-Electromagnetic, absoluteor ab system-International or practical system-Multiplying factors-Othersystems-Electrical units, conversion factors-Symbols.
• CHAPTER Ⅷ INDICATING INSTRUMENTS = 85
• The D'Arsonval galvanometer-Galvanometer shunts-The Ayrton shunt-Voltmeters-Ammeters and ammeter shunts-Wattmeters-Hot-wire ammeters and voltmeters-The Wheat stone bridge-Potentiometers-Oscillographs and oscillograms-Vibrator type of oscillograph-Megohmer-Permeameter.
• CHATPER Ⅸ THE DIELECTRIC FIELD = 112
• Dielectric induction-Energy stored in dielectric field-Mechanical force between condenser plates-Dischaging a condenser through resistance-Charging a condenser, resistance in series-Disruptive strongth, piereing pressure-Specific dielectric strength-The voltage gradient-One homogeneous dielectric-Residual charge-Two or more dielectrics in parallel-Two or more dielectries in series-Combination of series and parallel circuits-Problems.
• CHATPER Ⅹ THE MAGNETIC FIELD = 136
• Unit pole-Field intensity-Around straight wire carrying current-On axis of circular coil-On axis of solenoid-Inside conductor-Between two parallel conductors-Magnetic potential-Around a magnet pole-On axis of circular coil-For any coil at any point-The line integral-Magnetomotive force-Magnetic induction, inductance-Mutual inductance, coupling coefficient-Energy in magnetic field-Kinetic energy-Discharging a magnetic field through resistance-Forming a magnetic field.
• CHAPTER XI MAGNETIC PROPERTIES OF IRON AND STEEL = 176
• Magnetic materials-Permeability, reluctivity-The B H curves-Magnetization curve-Hysteresis loops-Permalloy-Froelich's formula magnetic saturation-Residual magnetism, retentivity, coercive force-Hystercsis losses-Steimmetz' equation-Annealing aging, recalescence, demagnctization-Eddy currents-Magnetic flux measurements.
• CHAPTER XII THE DYNAMO = 206
• Basic principles-The dynamo machine-The yoke-The poles-The armature core-The commutator-The brushes, brush holders and rocker arm-Field excitation-Field windings-Field rheostats-Field discharge resistance-Unipolar or hompolar generators.
• CHAPTER XIII ARMATURE WINDINGS = 229
• Ring windings-Multiplicity and reentrancy-Drum windings-Winding element-Numbering of element sides, winding pitches-Lap windings；Selection of pitches； Progressive and retrogressive windings； Commutator pitch； Reentrancy-Lap windings with several coil sides per slot-Wave windings : Selection of pitches； Dummy coils； progressive and retrogressive windings； Commutator pitch； Reentrancy-Equalizer connections-Frog-leg or grass-hopper winding-Recapitulation of winding rules-Problems.
• CHAPTER XIV ARMATURE REACTION = 258
• Armature reaction in generators-Shifting brushes-Demagnetizing and cross magnetizing components of armature reaction-Armature reaction in motors-Compensating windings.
• CHAPTER XV GENERATOR CHARACTERISTICS = 271
• Saturation curves-Field characteristic curve-Process of building up voltage-Critical field resistance-Characteristics of separately excited generators； External characteristics； Load characterstic-Characterstlics of shunt generator； Saturation curve of shunt generator； External characteristic of shunt generator； Total characteristic of shunt generator-Characteristics of series generators； External and internal characteristies； Stability of operation of series generators-Characteristics of compound generators : Saturation curve for compound generator； External characteristic of short shunt, compound generator； The series-field shunt-Parallel operation of generators : Series generator； Shunt generators； Compouund generators-Regulation-Problems.
• CHATPER XVI MOTOR CHARACTERISTICS = 309
• Counter-electromotive force-Mechanical power-Torque-Characteristies of the shunt motor and the separately excited motor； Speed characteristie； Torque characteristics-Characteristics of a series motor : Speed-load characteristies； Torque characteristic-Characteristies for the differential compound motor : Speed characteristic； Torque characteristics-Characteristics of the cumulative compound motor : Speed characteristics； Torque characteristics-Sets of typieal speed-load and torque-load characteristics-The starting of motors-Electirc railway motors-Sereies parallel control : Series motors-Speed control shunt motors : Rheostatic control； Voltage control； Field flux control-Division of load between motors-Regulation-Problems.
• CHAPTER XVII COMMUTATION = 351
• Process of commutation-Resisfance method-Counter e. m. f. method-Contact resistance-Contact voltage drop-Sparking-Sparking criterion-Flashing-Commutation poles-Compensating windings.
• CHAPTER XVIII LOSSES, EFFICIENCY, HEATING, RATING = 376
• Copper losses-Iron losses-Frietion and windage losses-Stray load losses-Directly measured efficiency-Conventional efficiency-All day efficiency-Determination of losses in series generators-Temperature limits-Methods for temperature determination-Continnous rating-Short time rating-Nominal rating-Rating for intermittent, periodie and varying duty-Rating of railway motors-Dielectric test-Insulation resistance.
• CHATPER XIX ELECTROLYTIC CONDUCTION BATTERUES ELECTROLYSIS = 400
• Faraday's laws of electrolysis-Electromotive force of cell-Polarization of cell-Classification-Primary batteries-Amalgamation of zine electrodes-Rating of primary batteries-Efficiency of primary batteries-Storage batteries-The lead battery-The Edison nickel iron battery-Rating of storage batteries-Efficiencies of storage batteries-Uses of storage batteries-Electrolysis.
• CHATPER XX TRANSMISSION AND DISTRIBUTION = 423
• National electrieal code-Direct current power transmission-The Thury systen-Direct current distribution systems-Direct current series circuits or consfant current systems-Direct current multiple circuits or constant potential systems-Copper conduetors-Fceders and mains-The Edison three-wire system-Power supply for Edison three-wire distribution system-Three-wire generators-Distribution for electric street railways-Boosters-Series booster-Shunt booster and battery-Reversible booster and floating battery-Battery with resistance or end cell control-Voltage regulation-Type TD regulator-Train lighting-Third brush generator.
• CHAPTER XXI thermionic and gaseous conduction = 458
• Edison effect-Thermionic emission-The Fleming valve-Two electrode tubes-Kenotron-Space-charge saturation-Three electrode tubes-Pliotron-X-rays-Gascous conduction-Gas tube rectifier.
• CHAPTER XXII INDUSTRIAL APPLICATIONS = 471
• Metropolitan direet-current areas-Transportation-Communication-Power-Illumination-Electrolytic proccesses-Arc welding-Dust precipitation-Control.
• APPENDIX TREATMENT FOR ELECTRICAL SHOCK = 483
• Free victim from current immediately-Attend instantly to victim's breathing-Schaefer or prone-pressure method of artificial respiration-Send for a doctor-First care of burns.
• INDEX = 489