Flux conservation 01 PUBLIC

Comparing flux conservation in real and behavioural inductors.

Comparing flux conservation in real and behavioural inductors.

For the real inductor:

I1 charges L1 to 1A. L2 is discharged (the current through it = 0). At T=0.1ms the top end of L1 is shorted to ground i.e. I1 is shorted out. At T=0.5ms L2 is switched in series with L1. As expected due to flux conservation between L1 and L2, the current through L1 falls to 0.5A. Simultaneously, the current through L2 rises to 0.5A.

For the behavioural inductor:

I2 passes 1A through VCCSind1. At T=0.1ms the top end of I1 is shorted to ground. At T=0.5ms the voltage on the V(value) control parameter net is doubled from 1V to 2V. As expected due to flux conservation, the current through VCCSind1 falls to 0.5A.

This circuit demonstrates that the current through a behavioural inductor realised using a behavioural DC transformer changes in exactly the same way as that through the real inductor as its inductance is changed.

Therefore, this implementation of a behavioural inductor conserves flux.

Simulate > Time Domain > Run Time-Domain Simulation.

Note that L1 and L2 in this simulation have their R_ESR values = 1uR.

See :

for background.