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Field Current of DC Shunt Motor Calculator

Formula

The formula to calculate the Field Current is:

$I_{\text{f}} = \frac{V_{\text{sp}}}{R_{\text{sh}}}$

Definition

Field current refers to the electrical current that is supplied to the field winding or field coil of an electric machine, such as a generator or motor.

Example Calculation

Let's assume the following values:

Supply Voltage (Vsp) = 239 V
Shunt Field Resistance (Rsh) = 159 Ω

Using the formula:

$I_{\text{f}} = \frac{239}{159} \approx 1.50314465408805 \text{ A}$

Conversion Chart

Supply Voltage (Vsp)	Field Current (If)
230 V	1.446540880503 A
235 V	1.477987421384 A
240 V	1.509433962264 A
245 V	1.540880503145 A
250 V	1.572327044025 A