Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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Página 14
... expressed by Equation 7. The voltmeter will only indicate this tension provided that the brushes are placed precisely at the neutral points , for in this position only will all the conductors between two brushes be generating a tension ...
... expressed by Equation 7. The voltmeter will only indicate this tension provided that the brushes are placed precisely at the neutral points , for in this position only will all the conductors between two brushes be generating a tension ...
Página 20
... expression for the rate of expenditure of energy in doing work . Let us suppose that part of the conducting circuit is placed near some magnetic field , so that when a current is flowing in the circuit the action of the current on the ...
... expression for the rate of expenditure of energy in doing work . Let us suppose that part of the conducting circuit is placed near some magnetic field , so that when a current is flowing in the circuit the action of the current on the ...
Página 21
... expressed in horse - power , multiply by 746 we get finally the same quantity expressed in watts . If we now substitute for Fr the letter t , representing the torque in inch - pounds , we get the rate of doing work = w = 0 · 71tn watt ...
... expressed in horse - power , multiply by 746 we get finally the same quantity expressed in watts . If we now substitute for Fr the letter t , representing the torque in inch - pounds , we get the rate of doing work = w = 0 · 71tn watt ...
Página 24
... expressed as the product of a force into a distance . Thus , if a body weighing ten pounds is raised through a distance of five feet , the energy communicated to the body is fifty foot - pounds . If the body is raised through this ...
... expressed as the product of a force into a distance . Thus , if a body weighing ten pounds is raised through a distance of five feet , the energy communicated to the body is fifty foot - pounds . If the body is raised through this ...
Página 46
... expressed in watts , to find the induction factor . If c is the current passing in the motor when fulfilling E - CR the required conditions , we know that M = n Now E Rw w = cMn , hence M = n Mn2 and we get the quadratic E ( M = 1 ± 2n ...
... expressed in watts , to find the induction factor . If c is the current passing in the motor when fulfilling E - CR the required conditions , we know that M = n Now E Rw w = cMn , hence M = n Mn2 and we get the quadratic E ( M = 1 ± 2n ...
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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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