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Type: Posts; User: paladyn

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  1. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    I do not know if I observed it well, but the higher the load, the feedback loop works at a lower frequency?

    Maybe if I moved a single pole (fp0) to a higher frequency it would be better?
  2. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    I've done more tests. I soldered 200nF between the comp and gnd plus plus the choke common mode choke and 4 capacitors 1000uF. The feedback loop was calculated as if the output capacity was 7000uF...
  3. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    asdf44
    When I find a moment, I will try to carry out such an experiment by setting rigidly pwm.

    Easy peasy
    I just meant the primary side waveforms. Because the secondary side waveforms look weak...
  4. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    Below are still oscillograms from the primary side:

    153745153746153747153748
    U_DS upper transistor

    153749153750153751153752
    Transformer

    I know that long paths are not conducive to low...
  5. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    I based all calculations of the loop on two sources:
    1. Switching Power Supplies A to Z Sanjaya Maniktala
    2. https://www.biricha.com/uploads/8/9/8/0/89803127/foundations__part2.b__2.pdf

    From...
  6. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    I carried out tests for the new frequency fcross = 1/3 fLc -> 61Hz. Screen shots of the oscilloscope load approximately 1ohm. Measurement made at the output of the inverter.


    153730
    2.5A Load...
  7. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    start with 3x slower than the o/p filter ...

    Okay, but please guide me from which frequency the crossover loop should be 3 times slower?

    Should fcrossover be 3 times slower than fp0?
    Should...
  8. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    Easy peasy

    The diagram is a 47uH choke, but currently I run tests on a 250uH choke. I thought that too small inductance is a problem.

    It will apply the current loop 5 x slower than the voltage,...
  9. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    No, because I do not have that knowledge. The only hitching point is patterns and calculations and live tests.
  10. Closed: Re: Half-Bridge 0-30V, 0-20A Feedback loop problem

    Easy peasy
    I place the PCB diagram of the power part and the PCB diagram of the control part



    The resonant frequency of the LC filter is fairly low at 184Hz.

    In general, I counted the...
  11. Closed: Half-Bridge 0-30V, 0-20A Feedback loop problem

    Welcome,

    Plans to design an adjustable power supply based on the SG3525 controller with the possibility of voltage regulation ~ 0-30V and current ~ 0-20A.

    I have a working power stage, which is...
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