|
Unfortunately, EC does not have a multitap transformer. I have seen many circuits here which try to simulate one by connecting a few transformers in series, like in the schematic shown on the left. Although this may work sometimes, such approach is generally wrong. The correct way is shown on the right.
Compare voltages in the two circuits to see the problem.
The reason why the first approach is wrong is that in a real multitap transformer all coils sit on the same magnetic core. Because they all share the same magnetic flux, even if you excite just a part of the primary coil, the induced voltage will appear on all other coils as well. This does not happen in the circuit on the left. The circuit on the right, however, correctly simulates this, as it effectively forces all 6 transformers to have equal magnetic fluxes in their cores.
Note also that for the best equivalence the primary coil inductance should be distributed among transformers proportionally to the square of the number of turns in each section of the multitap.
|
