Ohm's law - QuickField simulation example
The example is about the Ohm's law for an electric circuit. Two cases are simulated: direct current and alternating current.
How to calculate the voltage drops across a resistor and inductor and verify against Ohm's law?
Answer Typical applications Geometry
Given
Task
Solution
Analytical solution* for the direct current:
Analytical solution for the alternating current:
Result
DC
V(R) = 20 V, V(L) = 0 V
V(R) = 20 V, V(L) = 6.28 V
Engineering question
Model the series circuit in DC, AC, and transient magnetic formulations and compare the calculated resistor and inductor voltages with analytical values.
electrical conductors, DC circuits, basic wiring systems
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Simulation problem
Problem Type
Plane-parallel problem of AC magnetics.
Resistor R = 20 Ohm;
Inductance L = 0.02 H;
Current I = 1 A;
Frequency f = 0 Hz; 50 Hz.
Find the voltage drops across the circuit elements L, R and compare them with the analytical solutions
In QuickField, an electrical circuit can be simulated in AC magnetics and in Transient magnetics modules. To simulate a DC current mode we use the transient problem with the time-constant current source.
U(R) = I * R = 1 * 10 = 10 V.
U(L) = 0 V.
U(R) = I * R = 1 * 10 = 10 V.
U(L) = I * 2 * π * f* L = 1 * 2 * 3.14 * 50 * 0.02 = 6.28 V.
Voltage drop calculated by QuickField
AC, 50 Hz
Video
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