Electro-dynamics: The Direct-current MotorLongmans Green and Company, 1898 - 298 páginas |
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Página 64
The Direct-current Motor Charles Ashley Carus-Wilson. the speed increases with the induction factor ; ob = 2 . at b the speed ... final value ; the safety fuses would of R course prevent so large a current from passing . The values of the ...
The Direct-current Motor Charles Ashley Carus-Wilson. the speed increases with the induction factor ; ob = 2 . at b the speed ... final value ; the safety fuses would of R course prevent so large a current from passing . The values of the ...
Página 149
... final speed of the M motor when it has ceased to accelerate . If this is n ,, we then get n = n , + Ke kM Rt . ( 67 ) . and put n = n ; To find the value of the constant K , we know that when t = o , n is the initial speed , if we call ...
... final speed of the M motor when it has ceased to accelerate . If this is n ,, we then get n = n , + Ke kM Rt . ( 67 ) . and put n = n ; To find the value of the constant K , we know that when t = o , n is the initial speed , if we call ...
Página 150
... final speed n , by a quantity which is itself a fraction of that final speed , the value of the fraction depending on the time and on a certain constant T. The act of switching on the motor really amounts to changing the tension on the ...
... final speed n , by a quantity which is itself a fraction of that final speed , the value of the fraction depending on the time and on a certain constant T. The act of switching on the motor really amounts to changing the tension on the ...
Página 151
The Direct-current Motor Charles Ashley Carus-Wilson. than the final speed by an amount given by the equation . M , Equation 69 may be regarded still more generally . We have seen that the speed of a motor is given by E - CR and that an ...
The Direct-current Motor Charles Ashley Carus-Wilson. than the final speed by an amount given by the equation . M , Equation 69 may be regarded still more generally . We have seen that the speed of a motor is given by E - CR and that an ...
Página 152
... final speed divided by the time factor . If the initial speed is not zero we have from Equation 69 dn anf = e dt T t T or nj - nve T T .. ( 72 ) . Thus when anything occurs to change the speed from n , to n ,, the initial rate of change of ...
... final speed divided by the time factor . If the initial speed is not zero we have from Equation 69 dn anf = e dt T t T or nj - nve T T .. ( 72 ) . Thus when anything occurs to change the speed from n , to n ,, the initial rate of change of ...
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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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