No EMI Low Voltage AC Cables - QuickField simulation example
Magnetic flux density at the surface of a low-EMI AC cable whose outgoing and return currents are arranged to reduce the external magnetic field.
How to calculate flux density at the cable surface?
Answer Typical applications Geometry
Given
Task
Solution
Results
Current and flux density distribution in NELVAC wire.
Engineering question
Solve the AC-magnetic field for the cable geometry and compare the flux density at the cable surface to evaluate cancellation of the external EMI field.
balanced current cables, low-EMI wiring systems, interference-suppressed power cables
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Simulation problem
Problem Type
Plane-parallel problem of AC magnetics.
Conductivity of copper σ = 58 MS/m;
Frequency f = 50 Hz.
Determine flux density at the cable surface.
The simulation was conducted and EMI fields were observed assuming the wire is in air.
Current and flux density distribution in normal wire. Flux density at the cable surface is 2 uT.
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