Coil pulse heating - QuickField simulation example
A single triangle-shaped voltage pulse is applied to the coil.
How to calculate the switching current, heating power and temperature rise?
Answer Typical applications Geometry
Given
Task
Solution
Result
Power and average temperature vs. time plot. Winding temperature rise is ΔT = 4°C.
Engineering question
First solve the transient magnetic problem to obtain current and Joule heating versus time, then transfer the time-dependent losses to a transient heat-transfer model.
pulsed solenoid coils, electromagnetic actuators, duty-cycle coil systems
Download
Simulation problem
Problem Type
Axisymmetric multiphysics problem of Transient magnetics coupled to Transient heat transfer.
Number of turns N = 275;
Magnetic permeability of steel μ=1000;
Voltage pulse magnitude U = 100 V, pulse duration - 0.5 s.
Initial temperature T0 = +20°C
Calculate the switching current, heating power and temperature rise.
Analysis requires combined electromagnetic and heat transfer simulation. First the transient magnetic problem is simulated and current and Joule heat power are calculated at every moment of time. Then transient heat-transfer problem is simulated. Heat transfer problem takes the Joule heat power momentary values from the transient magnetic problem results.
Voltage and current vs. time plot:
Video
Related examples