Akula0083 Light No3 - Dual TL494

[JohnnBlade]

Remarkable job JB! Thanks for everything! Your efforts and results inspires us too! 

Thnx Jeg, glad i could help.

[JohnnBlade]

might it be of any use, i have opened a group chat for Akula's circuits in skype

skype:?chat&blob=ddLishBVfGeIRFTTffXXweoS257e_oIQwF5LhcXPblKQFlG6R-hTN_VuVwEWG2Nn7xnVNQ

just copy this link and paste it into any skype chat window and it will redirect you to the group chat

Greets JB

[EMJunkie]

Hey JB,

How is the circuit going? Is it working as expected?

What characteristics does it exhibit?

Keen to join the Skype group.

Thanks

All the Best

  Chris

[d3x0r]

I don't understand why spice does such strange things with inductors....


Threw together most of the TL494 circuit with just pulse generators as drivers for the mosfets ...


I added a huge farad cap which would be effective power used (eventually)...


L1 is the pickup inductor  (red current through this coil)
L2 higher induction driver (blue current through this coil)
L3 lower induction driver  (green current through this coil)


Purple; lower frequency driver(M1); cyan higher frequency driver (M2)


1) L1 only gets effective current after the pulses; really it should be a combination of the increasing current while the primaries are increasing...
2) current in L2 and L3 is backwards; and when I reverse L2 (picture2) It somehow kills the other coil's ability to conduct...


I don't understand if the coils are connected in the same direction... okay if I remove the inductor binding argument, they do go in the same direction... so because of mutual induction the  it ends up forcing current backwards through M1....  why M1?  that's on the higher inductor coil; would think it would have more influence on L3 than L3 has on L2....


Spice sim source

[MarkE]

You have to be very careful with the orientation of coils that are coupled thus making transformers using K elements.