Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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... experiments on the Buffalo and Niagara Falls Electric Railway ; and the Railway Department of the General Electric Company , for furnishing me with valuable information and data . MCGILL UNIVERSITY , MONTREAL : February 1898 . C. A. ...
... experiments on the Buffalo and Niagara Falls Electric Railway ; and the Railway Department of the General Electric Company , for furnishing me with valuable information and data . MCGILL UNIVERSITY , MONTREAL : February 1898 . C. A. ...
Página 8
... experiment . On exciting the magnets we shall generally find that the pull is slightly increased without having any current in the armature ; this will be explained later on , but we may state briefly that a definite torque is required ...
... experiment . On exciting the magnets we shall generally find that the pull is slightly increased without having any current in the armature ; this will be explained later on , but we may state briefly that a definite torque is required ...
Página 5
... will be obtained . The experiment here described , in which the induc- tion factor is found by measuring the torque when 100 200 300 400 500 the machine is at rest , shows that the force CH . I 9 THE INDUCTION FACTOR.
... will be obtained . The experiment here described , in which the induc- tion factor is found by measuring the torque when 100 200 300 400 500 the machine is at rest , shows that the force CH . I 9 THE INDUCTION FACTOR.
Página 6
... experiment a current of 78 amperes was passed through the armature , and a fall of potential of 3.74 volts observed , giving the resistance from brush to brush as 0.048 ohm . In Fig . 5 let ab represent the length π , where r is the ...
... experiment a current of 78 amperes was passed through the armature , and a fall of potential of 3.74 volts observed , giving the resistance from brush to brush as 0.048 ohm . In Fig . 5 let ab represent the length π , where r is the ...
Página 8
... experiment . On exciting the magnets we shall generally find that the pull is slightly increased without having any current in the armature ; this will be explained later on , but we may state briefly that a definite torque is required ...
... experiment . On exciting the magnets we shall generally find that the pull is slightly increased without having any current in the armature ; this will be explained later on , but we may state briefly that a definite torque is required ...
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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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