The formula to calculate the Shunt Field Current is:
\[ I_{\text{sh}} = I_{\text{a}} - I_{\text{L}} \]
Shunt field current is the current which flows through the shunt field windings. It is an important parameter in the operation and control of DC motors.
Let's assume the following values:
Using the formula:
\[ I_{\text{sh}} = 1.7 - 0.95 = 0.75 \text{ A} \]
| Armature Current (Ia) | Shunt Field Current (Ish) |
|---|---|
| 1 A | 0.05 A |
| 1.1 A | 0.15 A |
| 1.2 A | 0.25 A |
| 1.3 A | 0.35 A |
| 1.4 A | 0.45 A |
| 1.5 A | 0.55 A |
| 1.6 A | 0.65 A |
| 1.7 A | 0.75 A |
| 1.8 A | 0.85 A |
| 1.9 A | 0.95 A |
