Self Excited DC generator in a short-shunt cumulative compound configuration with variable output...

Question

Self Excited DC generator in a short-shunt cumulative compound configuration with variable output control to the load. Assume a constant speed prime mover.

When running at comacity and its specifcations are as follows:
Rated output 2000 Watts@125Volts
Armature Resistance .3 ohms
Shunt Field Resistance 50 ohms
Series Field Resistance .6 ohms
Rhoestat Resistance 12.5 ohms

Robert · Accepted Answer

Solution: 
Rating of the generator is given by: 
   2000W 
Terminal voltage is 125V 
Hence the load current is: 
   
    
   

Net resistance in shunt winding is: 
  Shunt field resistance+ rheostat resistance 
  Rsh=50+12.5 
Rsh=62.5 ohm 
Now shunt field current is:

Self Excited DC generator in a short-shunt cumulative compound configuration with variable output control to the load. Assume a constant speed prime mover. When running at comacity and its...

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