Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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Página 9
... torque due to the current in the armature . 600 600 500 400 500 200 100 CURVE OF TORQUE AND CURRENT FOR EDISON BI - POLAR DYNAMO Current in Magnets 4.5 Amperes . A - 200 10 20 AMPERES 30 40 50 IN 60 ARMATURE 70 80 FIG . 4 An ammeter ...
... torque due to the current in the armature . 600 600 500 400 500 200 100 CURVE OF TORQUE AND CURRENT FOR EDISON BI - POLAR DYNAMO Current in Magnets 4.5 Amperes . A - 200 10 20 AMPERES 30 40 50 IN 60 ARMATURE 70 80 FIG . 4 An ammeter ...
Página 17
... torque or the speed method . If the values of M are plotted on a base of current in the magnets , we get a curve that we shall call the induction curve . ' Fig . 8 gives the induction curve of the arc light dynamo already described ...
... torque or the speed method . If the values of M are plotted on a base of current in the magnets , we get a curve that we shall call the induction curve . ' Fig . 8 gives the induction curve of the arc light dynamo already described ...
Página 18
... curve and a diminution in the value of M. The amount of this diminution depends very largely upon the form of the pole pieces . In some machines where the value of the induction factor 400 300 200 Z INCH 100 500 POUNDS 1000 900 TORQUE ...
... curve and a diminution in the value of M. The amount of this diminution depends very largely upon the form of the pole pieces . In some machines where the value of the induction factor 400 300 200 Z INCH 100 500 POUNDS 1000 900 TORQUE ...
Página 68
... curve , where vertical ordinates represent the speed in revolutions per second , and whose horizontal ordinates represent the torque resisting the motion . For uniform speed the torque due to the current assisting the motion must be ...
... curve , where vertical ordinates represent the speed in revolutions per second , and whose horizontal ordinates represent the torque resisting the motion . For uniform speed the torque due to the current assisting the motion must be ...
Página 69
... torque required to overcome the initial friction , an initial current c = 71 t will be required to start the meter . If M Պլ and n , are the speeds for currents c , and c2 , we shall have , assuming the torque curve to be straight ...
... torque required to overcome the initial friction , an initial current c = 71 t will be required to start the meter . If M Պլ and n , are the speeds for currents c , and c2 , we shall have , assuming the torque curve to be straight ...
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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
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