Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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Página 8
... shows that we can find the induction factor of a dynamo by observing the current in the armature and the corresponding torque on the shaft . A lever is bolted to the shaft of the dynamo , and the pull at a measured distance from the ...
... shows that we can find the induction factor of a dynamo by observing the current in the armature and the corresponding torque on the shaft . A lever is bolted to the shaft of the dynamo , and the pull at a measured distance from the ...
Página 9
... will be obtained . The experiment here described , in which the induc- tion factor is found by measuring the torque when 500 400 300 200 100 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 500 400 300 200 100 the machine is at rest , shows that the force CH . I 9 THE INDUCTION FACTOR.
Página 10
... shows that the force produced by a current in the armature is independent of the motion of the armature . In Fig . 4 will be found the results of a torque test made with an Edison 12 K.W. dynamo . This machine has 200 conductors on the ...
... shows that the force produced by a current in the armature is independent of the motion of the armature . In Fig . 4 will be found the results of a torque test made with an Edison 12 K.W. dynamo . This machine has 200 conductors on the ...
Página 14
... shows that M depends only upon p , A , and N , and does not in any way involve the speed . We have here a second method for finding the value of the induction factor - namely , to drive the dynamo as a generator , and observe the ...
... shows that M depends only upon p , A , and N , and does not in any way involve the speed . We have here a second method for finding the value of the induction factor - namely , to drive the dynamo as a generator , and observe the ...
Página 19
... shows no change in the value of M due to this cause . This matter will be discussed in greater detail in a later chapter under the name of Armature Reaction . CHAPTER II CONDITIONS OF UNIFORM MOTION WHEN a conducting circuit c 2 CH . I ...
... shows no change in the value of M due to this cause . This matter will be discussed in greater detail in a later chapter under the name of Armature Reaction . CHAPTER II CONDITIONS OF UNIFORM MOTION WHEN a conducting circuit c 2 CH . I ...
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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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