Generator Losses - Copper,Hysteresis, Eddy Current and Mechanical losses
In dc generators, as in most electrical devices, certain forces act to decrease the efficiency. These forces, as they affect the armature, are considered as losses and may be defined as follows:
1. Copper loss in the winding 2. Magnetic Losses 3. Mechanical Losses
Copper lossThe power lost in the form of heat in the armature winding of a generator is known as Copper loss. Heat is generated any time current flows in a conductor.
loss is the Copper loss, which increases as current increases. The amount of heat generated is also proportional to the resistance of the conductor. The resistance of the conductor varies directly with its length and inversely with its cross- sectional area. Copper loss is minimized in armature windings by using large diameter wire.Copper loss is again divided as