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  • Author Author: abhishek2018
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Final Results Blog : Playing with Bourns 2.25-22 W Flyback Transformers

abhishek2018

This is the mandatory Final Results Blog for Experimenting with Flyback Transformers.     

I cap up my participation in this design challenge playing with common mode chokes and AC-DC flybacks. I am not submitting dedicted blogs for these due-to short circuits.

The short-circuit in CM choke happened due to hurry  and accidently shorting it, as the wire flew to opposite !

The short circuit in AC-DC  flybacks happened, dont who why, tried 4-5 ways with 4-5 transformers including polarity, exchanging primary secondary, all gave short circuits with a trip.  

1)  The general schematic to run BOURNS AC- DC transformers is below,

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 Fig. :  General Schematic : BOURNS AC-DC Flyback Transformer, in conjunction with BOURNS gate drive transformer and BOURNS common mode choke..

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Fig. : Planned Schematic for AC-DC Flybacks, gate drive and Common Mode Choke.

2) Even the plan was to remove  full bridge rectifier , after mains

Common Mode Chokes

For Common Mode Chokes, there is a good blog on Common Mode which explains - 'EMC Basics: Common Mode vs. Differential Noise'. 

Experiment Play 1, BOURNS 093267

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Also, magnetic field is measured using mobile applet 

Experiment Play 2, BOURNS 071923

 Now tried another choke but wire flew. and    costed 2 multimeters

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Experiment Play 3

Learn from the mistake, so soldered now

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Experiment Play 4 

Common mode choke now with full wave  bridge rectifier

{gallery}My Gallery Title
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Experiment Play 5

Measuring inducatnces of both Common mode chokes, after soldering. Here again a waste of effort as after short only I should have tested, not after soldering.

The LCR meter indicates, primary is permanently shorted

1) Choke 1

Primary 

inductance  ---

capacitance  ---

Secondary

inductance  : 0.48 mH ,in second reading, this was -----

capacitance  : 5.3 pF

 

2) Choke 2

Primary : 

inductance   ---

capacitance  ---

Secondary

inductance  0.505 mH

capacitance  89.8- 90.2 μF

 

EXPERIMENT PLAY 6

The 4-5 transformers which caused short, not uploaded.

B.  Optional Blogs Summary

1. Optional Blog 1

Blog 1 : Introduction - Designing with Bourns 2.25-22 W Flyback Transformers

2. Optional Blog 2

Blog 2 : What flyback transformer is ? A strictly boost or strictly step-down or strictly buck-boost

3.Optional Blog 3

Blog 3 : What Self Claimed Novel B Method on Flyback transformer is ?

4. Optional Blog 4

Blog 4 : Playing with BOURNS Transformers Respecting Flyback Topology Emotions - 1

5. Optional Blog 5 - Not submitted

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  • The shorted common moDe chokes have a future, as these will be used in my Novel B postulates, with LCR meter . (NOT on mains)

    Also, the short circuit happened would be used in my Novel ß-Unified (Non Linear)Theory/Postulates/Propositions !

  • in reply to Jan Cumps

    Didnt read Dr. Gough Lui's blog in full.

    Thanks for correcting.

  • in reply to abhishek2018

    "none has detailed made videos on it"

      made photos of internals. With the different windings, including shield.

  • in reply to abhishek2018

    Again good Endurance of BOURNS transformers, it looks this side might not be primary as the other side voltage is not 6V.

     So, good endurance on DC line the AC but, generally such winding should be primary, may be in BOURNS ou USA code this is secondary otherwise, on the primary instead of AC, these are bias pins. 

  • EXPERIMENT PLAY 8

    Another success with other BOURNS AC-DC transformer