Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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Página 2
... surface conductors , and let their axes lie on a cylindrical surface of radius r and length l centi- metres , as shown in Fig . 2. The distance between any 2πι two adjacent conductors is centimetres , and the cylin- 2 CH . I THE DIRECT ...
... surface conductors , and let their axes lie on a cylindrical surface of radius r and length l centi- metres , as shown in Fig . 2. The distance between any 2πι two adjacent conductors is centimetres , and the cylin- 2 CH . I THE DIRECT ...
Página 3
... surface between them , 2πrl will be the intensity of magnetisation at the surface of the 360 FIG . 2 cylinder , that is , the number of lines per square centimetre crossing the tangent plane to the cylinder at that point . In Fig . 3 ...
... surface between them , 2πrl will be the intensity of magnetisation at the surface of the 360 FIG . 2 cylinder , that is , the number of lines per square centimetre crossing the tangent plane to the cylinder at that point . In Fig . 3 ...
Página 5
... surface from one pole . Hence the couple or torque t , due to the forces on both sides , tending to turn the armature , 1 is AiN10 . The whole current , c , passing into or out of П the armature will be twice that in each conductor , so ...
... surface from one pole . Hence the couple or torque t , due to the forces on both sides , tending to turn the armature , 1 is AiN10 . The whole current , c , passing into or out of П the armature will be twice that in each conductor , so ...
Página 6
... surface conductors with 16.1 x 106 lines per pole . The armature is series connected , giving p = 2 . The torque for 300 amperes is 60,000 inch - pounds . Example 2. - A ten - pole dynamo has 28.6 × 106 lines per pole and 1,440 surface ...
... surface conductors with 16.1 x 106 lines per pole . The armature is series connected , giving p = 2 . The torque for 300 amperes is 60,000 inch - pounds . Example 2. - A ten - pole dynamo has 28.6 × 106 lines per pole and 1,440 surface ...
Página 7
... surface conductors . The induction factor is 33.6 . When M is known the torque for any current can at once be obtained from Equation 5 . Example 5. - A motor has an induction factor of 5 . The torque on the shaft for 90 amperes in the ...
... surface conductors . The induction factor is 33.6 . When M is known the torque for any current can at once be obtained from Equation 5 . Example 5. - A motor has an induction factor of 5 . The torque on the shaft for 90 amperes in the ...
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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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