Saturday, 18 February 2017

Field control of DC motor


Field control of DC motor





In field control of DC motor terminal voltage is kept constant.
The field flux (φ_f) is directly proportional to the field current (I_f) .
Speed (N) is inversely proportional to field flux (φ_f) .
So as the field flux (φ_f) will be less speed (N) will be more.
If the current is less field flux (φ_f)  is less hence the speed (N) will be more.

We can control speed by field diverter method or by using tapped field control.

                                                       WATCH THIS VIDEO





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