Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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... 123 146 VIII . THE FORCE FACTOR . 169 IX . CONTROL 184 X. TIME CURVES . 209 XI . DESIGN OF RAILWAY MOTORS 227 XII . ARMATURE REACTION 259 PROBLEMS 287 INDEX 295 THE DIRECT - CURRENT MOTOR CHAPTER I THE INDUCTION FACTOR.
... 123 146 VIII . THE FORCE FACTOR . 169 IX . CONTROL 184 X. TIME CURVES . 209 XI . DESIGN OF RAILWAY MOTORS 227 XII . ARMATURE REACTION 259 PROBLEMS 287 INDEX 295 THE DIRECT - CURRENT MOTOR CHAPTER I THE INDUCTION FACTOR.
Página 1
... force on the conductor is given by f = Hli10 - 1 dynes . ( 1 ) . The sign of ƒ can be changed by reversing the sign of either H or i ; hence the direction of the force can be reversed by altering the sign of the field or of the current ...
... force on the conductor is given by f = Hli10 - 1 dynes . ( 1 ) . The sign of ƒ can be changed by reversing the sign of either H or i ; hence the direction of the force can be reversed by altering the sign of the field or of the current ...
Página 2
... force due to the magnets are in the same direction . Hence the forces acting on the conductors constitute a couple . If lines of force force f A Current down O brush brush forcé f lines of force Current up FIG . 1 any number of ...
... force due to the magnets are in the same direction . Hence the forces acting on the conductors constitute a couple . If lines of force force f A Current down O brush brush forcé f lines of force Current up FIG . 1 any number of ...
Página 3
... force enter the cylinder in the direction indicated by the sheaf of arrows , so that the plane at right angles to the lines of force makes an angle of 0 degrees with the tangent plane at d , the line edc representing a portion of the ...
... force enter the cylinder in the direction indicated by the sheaf of arrows , so that the plane at right angles to the lines of force makes an angle of 0 degrees with the tangent plane at d , the line edc representing a portion of the ...
Página 4
... force acts in a direction making 0 degrees with the tangent Hence the resolved part of the force in the direction at d . Aidn the tangent is 10 - 1 . 27π1 The sum of the tangential forces on all the conductors AiN round one side of the ...
... force acts in a direction making 0 degrees with the tangent Hence the resolved part of the force in the direction at d . Aidn the tangent is 10 - 1 . 27π1 The sum of the tangential forces on all the conductors AiN round one side of the ...
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Términos y frases comunes
accelerating current acceleration curve amperes armature B.Sc brushes cent centimetres CHEMISTRY circuit College connected in series constant Crown 8vo current curve current per motor Diagrams diameter difference distance travelled dynamo ELECTRICITY ELEMENTARY 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 gives greater Hence horizontal horse-power hysteresis Illustrations inch-pounds increase induced tension induction curve induction factor line watts lines of force load London machine magnetic circuit 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 rotation running Science series-wound motor speed curve Suppose surface conductors terminal tension tion tons torque curve torque loss total current total torque tractive effort velocity ratio volts weight Woodcuts
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