What is the formula for the voltage across each field coil?

To determine the voltage across each field coil in an electrical circuit, including those found in motors or generators, it’s important to consider that the specific formula can vary based on the type of system (e.g., series, parallel, or compound wound) and what exactly you are solving for (e.g., starting condition, under load, etc.). However, a common principle that applies to finding the voltage across any component in a circuit is Ohm’s Law, which states that Voltage (V) = Current (I) x Resistance (R).

For a single field coil, if you know the current flowing through the coil and the resistance of the coil, you can determine the voltage across it using Ohm’s Law:

[ V_{coil} = I_{coil} times R_{coil} ]

Where:

– (V_{coil}) is the voltage across the coil,

– (I_{coil}) is the current through the coil, and

– (R_{coil}) is the resistance of the coil.

For multiple coils, such as in series or parallel circuits, the approach to finding the voltage across each coil will differ:

– In series circuits, all components share the same current, but the voltage across each component can differ based on its resistance. The total voltage across the series circuit is the sum of the voltages across each component.

– In parallel circuits, all components share the same voltage. If you have multiple field coils in parallel, and