How Does Flux Density Influence DC Motor Performance?

[dc2209]

1. Hi, the question is "A simple D.C motor has been constructed using one pole pair having a square surface of 6cm × 6cm and produced a flux of 18mWb. The commutator has 4 segments, which allows for two simple loops to be connected. Two brushes are used with the positive applied to the brush nearest South Pole passing a current of 15A. Predict the performance of the motor by reference to electrical theory.



2. B= I/A maybe is a relevant equation?



3. I have worked out the flux density B = 0.018/0.036^2 = 13.89T. What would you suggest the question is getting at by saying to "predict performance by reference to electrical theory".


Thanks

 

[Simon Bridge]

It means what it says.
Use your understanding of electromagnetics to describe how you would expect the motor to perform.