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    Using a radio is cheating :D but yes that should...

    Using a radio is cheating :D but yes that should Work. As I said my fantacy was not into this :D.
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    This goes for "small" devices as well :). ...

    This goes for "small" devices as well :).
    Silvio. If one only have a scope and some Fluke multimeters, how to test for emc ? Some ground knowledge is perfect, but my fantacy has not yet brought me...
  3. Thread: 6KW class D

    by Malmir
    Replies
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    32,093

    46A on a PCB could be at a 150um board. I never...

    46A on a PCB could be at a 150um board. I never remember the convertion from OZ to um so I can not tell that number. But i have a 18 channel dimmer rack running 3 phase 400V 32A on 105um boards, and...
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    Never hear of that ? What do you think of when...

    Never hear of that ? What do you think of when saying nested amp ? Maybe I know of what You look for, by another name :D.
  5. Sorry if allready answered somewhere, but i have...

    Sorry if allready answered somewhere, but i have searched and searched without any good results.
    There are some perfect calculators in here :D. But..... But I miss one thing.
    If one like me have...
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    What people told me was : It would be much easier...

    What people told me was : It would be much easier to do the regulation at the primary site instead of at the secondary site as i do. And I could control the duty cycle to reach the span i needed.
    My...
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    Dont get it, i just open the PDF ??? What the...

    Dont get it, i just open the PDF ???
    What the heck. In that design i do have 4 equal outputs from the ac/dc part and these outputs are then managed by each own dc2dc device, to lower the power waste...
  8. Maybe You should go for a 2 step. First a boost...

    Maybe You should go for a 2 step. First a boost to 300 or 400 Vdc and then a dc-dc to wished outputs.
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    Try to look at some of the ready made 3 phase...

    Try to look at some of the ready made 3 phase engine controllers and see what they needs for supply and use that as a guideline.
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    Lost in supplies. Traditionel vs SMPS ?

    Hi there. I have always been told that traditionel power supplies with huge transformers and large electrolytic bridges is much more Space consuming than a smps, also it is much more difficult to...
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    I am confused here. 380V in star and not 220V in...

    I am confused here. 380V in star and not 220V in triangle. Is that opersite ? In DK we have star 230V and triangle 400V !
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    Stupid Question. How to regulate the output...

    Stupid Question. How to regulate the output voltage precise enough, not having a feedback ? Or is it only usefull when variations are permitted ?
  13. Thread: smps 6000w

    by Malmir
    Replies
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    I dislike that first PCB design. No i am not...

    I dislike that first PCB design. No i am not exspert in SMPS yet, but the distance from primary to secondary is much much to small to be considered as safe. He do change the layout, but i still would...
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    1: Let the supply be partly controlled by output...

    1: Let the supply be partly controlled by output of amp. Not directly but like if the amp output was connected to "zero" of supply. Read i did NOT say GND for avoid confusion.
    2: Claiming 100%...
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    Lets go to the real world Panos, i did 2 with 78%...

    Lets go to the real world Panos, i did 2 with 78% efficientcy or more, so it is surely possible. No no no You do NOT need 40kW to do 20kW in old timers where one did not have almost any other...
  16. Thread: 6KW class D

    by Malmir
    Replies
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    32,093

    17kW auch my ears are screamiing for help :-)

    17kW auch my ears are screamiing for help :-)
  17. Thread: 6KW class D

    by Malmir
    Replies
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    It is late here 22:30 :-). How did You get that ?

    It is late here 22:30 :-). How did You get that ?
  18. Thread: 6KW class D

    by Malmir
    Replies
    51
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    32,093

    Or rather 185 if bridged.

    Or rather 185 if bridged.
  19. Thread: 6KW class D

    by Malmir
    Replies
    51
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    32,093

    Then lets feet the FETs with +/- 255V :-)or near...

    Then lets feet the FETs with +/- 255V :-)or near that. That should be possible for the 4kW only +255 if bridged :-).
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    230 * 0,64 = 147,2 = 147 or 148 ? 75 * 0,64 = ...

    230 * 0,64 = 147,2 = 147 or 148 ?
    75 * 0,64 = 48 ?
    Or did i miss a point somewhere ?
  21. Thread: 6KW class D

    by Malmir
    Replies
    51
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    32,093

    Did i miss something here ? P = U*U/R = 85*85/4....

    Did i miss something here ?
    P = U*U/R = 85*85/4. In Bridge You have double supply voltage =>
    P = U*2*U*2/4 = U*U = 7225
    From where do You get Your "2" and why only 1 time ???
  22. Thread: Simple amp 300w

    by Malmir
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    What did i miss here He did actually give the PCB...

    What did i miss here He did actually give the PCB design. Maybe in a format that need some work, but he did :-).
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    RAEL. Find a mentor whom You can "look over...

    RAEL. Find a mentor whom You can "look over shoulder" as i guess it will be almost impossible to say here or in a mail thread. It is NOT impossible to learn, but nor easy if You do not have easy...
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    Depending on a lot of things. Here is my rule of...

    Depending on a lot of things. Here is my rule of thump.
    5kW effektive = P * 0.78 => P = 6410,25W = U * U / 4 Ohm => 25641 (V*V) = U * U => U = 160,12815380508713348325366976769, easy said 160....
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    Many thoughts :), but non that yet might work as...

    Many thoughts :), but non that yet might work as you say.
    But i think i need guidelines from some one like microsim on this, as it will be needed to know a lot about smps, to understand where to...
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