My first Thread here !
I have Built an F4 and it works fine, but I would like to try CLC instead of CRC in the powersupply. I have some big toroidinductors with dual windings
( 2x15mH or in series 1x60mH at least 5A current )
What would give best result ?
My plan was to put the inductors instead of the seriesresistors in the powersupply.
CLCLC (10000uF+15mH+10000uF+15mH+10000uF ) or
CLC ( 10000uF+60mH+10000uF )
I have more Caps (10000uF/35V) if needed.
Do anyone have any idea or experience ?
/Tord
I have Built an F4 and it works fine, but I would like to try CLC instead of CRC in the powersupply. I have some big toroidinductors with dual windings
( 2x15mH or in series 1x60mH at least 5A current )
What would give best result ?
My plan was to put the inductors instead of the seriesresistors in the powersupply.
CLCLC (10000uF+15mH+10000uF+15mH+10000uF ) or
CLC ( 10000uF+60mH+10000uF )
I have more Caps (10000uF/35V) if needed.
Do anyone have any idea or experience ?
/Tord
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if toroid is in case , then you can use them only as common mode choke - one winding in positive , second in negative leg
that way core will not saturate
that way core will not saturate
are they having airgap ?
if no ( most probably) then they must be used as I wrote
if yes , use them in whatever fashion you want
if no ( most probably) then they must be used as I wrote
if yes , use them in whatever fashion you want
I Think they have air gap ?
How do I check that ?
If so, is there any benefits to try CLCLC instead of CLC ?
How do I check that ?
If so, is there any benefits to try CLCLC instead of CLC ?
Read the datasheet. Google will help.
CLCLC will give you higher order (steeper) filtering but with higher frequency
due to the lower inductance (15mH), while CLC due to 60 mH will cut at much
lower frequency, but 3rd order only.
CLCLC might suffer from instability issues in some cases. Do a simulation with
PSU-Designer 2 !!!
Toroids with an air gap would be quite difficult to manufacture.
Some company probably does it.
C core often have an air gap.
EI can be assembled to have an air gap.
Some company probably does it.
C core often have an air gap.
EI can be assembled to have an air gap.
best bet , and easiest , use them as common mode choke
use what you have , in greatest amount you have and be done
overkill is , anyway, name of DIY game
in a meantime , go to Duncanamp's , download PSUD
read help (F1) before going serious
use what you have , in greatest amount you have and be done
overkill is , anyway, name of DIY game
in a meantime , go to Duncanamp's , download PSUD
read help (F1) before going serious
Use the psud . Try 20,000 to 30,000 for first cap . 100,000 has very high current spikes in position 1 which is very hard on the bridge and causes failure. 100,000 after the first inductor work for me . I am working on a f4 amp with 30,000 choke 2mh then 100,000 easy on the bridge. Regards
Larger toriods use cores made from a flat strip of material wound into the dognut. Gap can be provided by material alloyed into the strip.
Hello again. My toroidinductors do not have airgap, so that's it !
Have just asked the man that sold them.
Does not matter I will run them in 60mH connection like CLC.
Have just asked the man that sold them.
Does not matter I will run them in 60mH connection like CLC.
Well, I don't think I learned that from anything published but, word of mouth. There are also little 7x7x10mm smps inductors that appear to have a 1 piece (without a gap) core where the gap is provided by materials imbedded in the core material.
In the laminated Toriod case, think of a roll of tape used as a core. Where the tape is a core alloy. I have seen the inside of one of these before.
In the laminated Toriod case, think of a roll of tape used as a core. Where the tape is a core alloy. I have seen the inside of one of these before.
suggestion
Hello ,
at this moment i am in asia using low speed wifi from the hotel. Maybe you could take a look at the lundahl chokes which they did develop for heater supply of tube amps. They are dual winding chokes that can be used as common mode chokes or you can put the 2 windings in parallel which will reduce the numbers of mH but also the dcr . The biggest one will give you 100mH with the 2 coils in series recommended current is above 3A and saturating current is above 5A. The pass designs being class A with constant current flow i wouldnt worry to much about the dcr. Which will also let the voltage on the caps move up gradually. Greetings, edward
Hello ,
at this moment i am in asia using low speed wifi from the hotel. Maybe you could take a look at the lundahl chokes which they did develop for heater supply of tube amps. They are dual winding chokes that can be used as common mode chokes or you can put the 2 windings in parallel which will reduce the numbers of mH but also the dcr . The biggest one will give you 100mH with the 2 coils in series recommended current is above 3A and saturating current is above 5A. The pass designs being class A with constant current flow i wouldnt worry to much about the dcr. Which will also let the voltage on the caps move up gradually. Greetings, edward
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