Pulse transformer
Current response in the primary, secondary and tertiary windings of a pulse transformer after a square-wave voltage pulse is applied to the primary winding.
Engineering Problem
How can the currents in each winding of a pulse transformer be found?
Answer
Build a plane-parallel Transient Magnetics problem coupled with an external circuit, and evaluate each winding's current from the computed field results.
Typical Applications
- Pulse transformers
- Square-wave transformers
- Fast-transient transformers
Simulation Problem
- Problem Type
- Plane-parallel Transient Magnetics + circuit co-simulation
- Geometry
- External circuit with a filter, load and inductor; the core carries primary, secondary and tertiary windings.
- Given
- Core steel permeability μ = 500, conductivity zero (laminated core)
- Winding (copper) conductivity g = 56 MS/m
- Primary winding turns w1 = 20
- Secondary winding turns w2 = 40
- Tertiary winding turns w3 = 20
- Pulse voltage U1 = 0.5 V, pulse duration t = 0.1 s
- Task
- Compute the current in each winding.
- Solution
Using the symmetry of the geometric model, only the upper half of the transformer is kept, so the circuit element values should be halved accordingly.
