The formula to calculate the Armature Copper Loss is:
\[ P_{cu} = I_a^2 \cdot R_a \]
Copper loss refers to energy lost in the form of heat due to the resistance of the copper wire in an electrical device or system. Armature Current is defined as the current developed in the armature of an electrical DC generator due to the movement of the rotor. Armature Resistance is the ohmic resistance of the copper winding wires plus the brush resistance in an electrical generator.
Let's assume the following values:
Using the formula:
\[ P_{cu} = 1.7^2 \cdot 35.25 = 101.8725 \text{ W} \]
| Armature Current (Ia) | Armature Resistance (Ra) | Copper Loss (Pcu) |
|---|---|---|
| 1.5 A | 35.25 Ω | 79.3125 W |
| 1.6 A | 35.25 Ω | 90.2400 W |
| 1.7 A | 35.25 Ω | 101.8725 W |
| 1.8 A | 35.25 Ω | 114.2100 W |
| 1.9 A | 35.25 Ω | 127.2525 W |