yes apex 🙂
but they are not so professional and industrial production
visit http://labgruppen.com/
they have up to 20000W!! (20KW) D-class amplifier and use toroid cores.
(its visible in PLM20000 photos)
also bosch (Dynacord powermate-3 DSA series) and Crown as i sow before
and HONAMIC also 😀😀😀😀
but they are not so professional and industrial production
visit http://labgruppen.com/
they have up to 20000W!! (20KW) D-class amplifier and use toroid cores.
(its visible in PLM20000 photos)
also bosch (Dynacord powermate-3 DSA series) and Crown as i sow before
and HONAMIC also 😀😀😀😀
D200 also is not professional and industial product 🙂 just simple class D amp for diy.
Regards
SAEED JOON,
lab amps aren't class-d , their amps are based on Tracking Class-D or TD and the final stage is an AB class Amplifier.
Crown also using Micrometals -2 material but they are original core and never gets warm in low output current like you said before. for example T157-2 gets warm about 55 degree @ 10A output current and 150vPP inductor voltage i guess.
Dynacord is new in Class-D , i saw their using torodial core in PM-3 but can't guess the type of material because it's not visible clearly. maybe -2 material. you got a picture from inside ?
what is HONAMIC then !? any picture form inside ?
_________________
as apex said , D200 is good for start working on class-d , i learned meany things with this amp.
Regards,
IRSound
lab amps aren't class-d , their amps are based on Tracking Class-D or TD and the final stage is an AB class Amplifier.
Crown also using Micrometals -2 material but they are original core and never gets warm in low output current like you said before. for example T157-2 gets warm about 55 degree @ 10A output current and 150vPP inductor voltage i guess.
Dynacord is new in Class-D , i saw their using torodial core in PM-3 but can't guess the type of material because it's not visible clearly. maybe -2 material. you got a picture from inside ?
what is HONAMIC then !? any picture form inside ?
_________________
as apex said , D200 is good for start working on class-d , i learned meany things with this amp.
Regards,
IRSound
Attachments
dear IRsound
u absolutely right
in PM-3 they used 4 stage filter back to back, that core induction decrease in each stage and make the output signal clear and linear just like an AB-class amp output
2 of this cores are clear-red micrometal and 2 other (last stages) are regular white core and dark gray.
as u know D200 is amplifire stage of mackie SRM450 active speakers with -/+75volt rail voltage and absolutely is a high power industrial, safe, and good design.😎
also its designed base on IRAUDAMP1 from IR reference designed series and its so simple but accurate.
(Honamic is my Brand 😉 )
Regards,
u absolutely right
in PM-3 they used 4 stage filter back to back, that core induction decrease in each stage and make the output signal clear and linear just like an AB-class amp output
2 of this cores are clear-red micrometal and 2 other (last stages) are regular white core and dark gray.
as u know D200 is amplifire stage of mackie SRM450 active speakers with -/+75volt rail voltage and absolutely is a high power industrial, safe, and good design.😎
also its designed base on IRAUDAMP1 from IR reference designed series and its so simple but accurate.
(Honamic is my Brand 😉 )
Regards,
Attachments
Thanks for pictures , did you repair it ? if you have any other info (like part numbers of fets ,etc) please share with us.
using higher order filters isn't very easy , it should design carefully to obtain a good result.
yes i know everything about D200..the input stage-modulator-level shifter circuit taken from Mackie. the power stage-driver is taken from a russian amp. mile upload both schematic before. also the filter characteristic is like mackie.
Regards
using higher order filters isn't very easy , it should design carefully to obtain a good result.
yes i know everything about D200..the input stage-modulator-level shifter circuit taken from Mackie. the power stage-driver is taken from a russian amp. mile upload both schematic before. also the filter characteristic is like mackie.
commercial Class-D amps ?
Regards
Test after mounting heatsink
I reduced the number of turns on the inductor. Now it has 26 turns. I think I made a mistake. According to this: T106-2 It must have 47 turns.
10R/5W resistor heated up too much. I could even smell it. Could hear some noise. FETs also heated up like a class AB amp. Small heatsink is not enough. Are these all because of reducing the turns or something else?
need some help!
Thanks
I reduced the number of turns on the inductor. Now it has 26 turns. I think I made a mistake. According to this: T106-2 It must have 47 turns.
10R/5W resistor heated up too much. I could even smell it. Could hear some noise. FETs also heated up like a class AB amp. Small heatsink is not enough. Are these all because of reducing the turns or something else?
need some help!
Thanks
Attachments
65 turn will have inductance around 57uH. with 49 Trun of 0.8mm wire , will get 33uH.
- with 26 turn , will have 9uH which is very low and have higher Cut-off frequency more than 75KHz , it have bad effect on output HF.
Regards
Apex and IRsound,
Thanks for the help!
After winding about 45 turns, it gave me a good result. I had to increase the value of 510R to 2K2 to reduce the noises. Now everything is good. I will wind more turns and test it again later then i wouldn't need to increase 510R.
So far I couldn't reduce the heat emission of outputs in each case. May be IRF640 is not good. Unfortunately I can't find IRFB numbers here.
Amp is stable and overall good. What do you suggest me to increase the output power. Bridging 2 of these or increasing the voltage and outputs?
and waiting for your new amp(pcb) 😎
thanks!
Thanks for the help!
After winding about 45 turns, it gave me a good result. I had to increase the value of 510R to 2K2 to reduce the noises. Now everything is good. I will wind more turns and test it again later then i wouldn't need to increase 510R.
So far I couldn't reduce the heat emission of outputs in each case. May be IRF640 is not good. Unfortunately I can't find IRFB numbers here.
Amp is stable and overall good. What do you suggest me to increase the output power. Bridging 2 of these or increasing the voltage and outputs?
and waiting for your new amp(pcb) 😎
thanks!
Amp must work good with IRF640N, I suggest bridging 2 of D200 to increase output power.
Regards
Amazing respond to new outputs!
I'm so surprised today with IRF540N. No heat at all. Should be due to low Rds (44 mili ohms). Heatsink is at room temperature, full volume under 4 ohms load. Supply +/- 40v. Amazing!😱 What is the maximum supply voltage with IRF540? Data says it can handle upto 100V.
I'm so surprised today with IRF540N. No heat at all. Should be due to low Rds (44 mili ohms). Heatsink is at room temperature, full volume under 4 ohms load. Supply +/- 40v. Amazing!😱 What is the maximum supply voltage with IRF540? Data says it can handle upto 100V.
No. Ferrite cores are not good as the output inductor here. It will heat up like a burning coal. Just try it and have fun 😀
T106-2, T157-2 or any -2 iron powder cores are ideal.
T106-2
regards
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I was silly enough to just use a power inductor on the output of my class d amp.
It got to 120 degrees C !!!!
Someone recommended a t106-2 core and that worked great, barely gets warm.
It got to 120 degrees C !!!!
Someone recommended a t106-2 core and that worked great, barely gets warm.