Announcement

Collapse
No announcement yet.

Sense Adjustable Switching Power Supply ReCapped finished

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Sense Adjustable Switching Power Supply ReCapped finished

    I bought this switching supply power a few months ago but did not have time to do anything but now because of being in between jobs I now have time for projects that were waiting for me to have time to do them

    What do think about this switching power supply pictures are below

    One note theses pictures are after I had recap this power supply

    The capacitors were actually not that bad ESR value wise expect for a couple of them low UF value under 100 for non brand name capacitors

    One other note I moved the indicator LED light to the outside of the enclosure so I can see it better

    One final note which is a little strange for switching power supply I have worked with the inrush current is higher to trip my electronic fuse controller the maximum current for this controller is 5 amps

    The inrush current at startup is 4.75 amps with no load on the power supply

    If anyone is interested in this switching power supply I will post a link where you can buy one
    Attached Files
    Last edited by sam_sam_sam; 11-20-2020, 10:06 AM.
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    #2
    Re: Sense Adjustable Switching Power Supply ReCapped finished

    the inrush shows that the primary caps have some capability!

    Comment


      #3
      Re: Sense Adjustable Switching Power Supply ReCapped finished

      Thanks
      9 PC LCD Monitor
      6 LCD Flat Screen TV
      30 Desk Top Switching Power Supply
      10 Battery Charger Switching Power Supply for Power Tool
      6 18v Lithium Battery Power Boards for Tool Battery Packs
      1 XBox 360 Switching Power Supply and M Board
      25 Servo Drives 220/460 3 Phase
      6 De-soldering Station Switching Power Supply 1 Power Supply
      1 Dell Mother Board
      15 Computer Power Supply
      1 HP Printer Supply & Control Board * lighting finished it *


      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
      2 Hem Saw Computer Stack Board

      All of these had CAPs POOF
      All of the mosfet that are taken out by bad caps

      Comment


        #4
        Re: Sense Adjustable Switching Power Supply ReCapped finished

        Originally posted by sam_sam_sam View Post
        What do think about this switching power supply pictures are below
        Well, I don't want to sound like a negative nancy... but many of these cheaper Chinese PSUs have a lot of "unpolished" sides.

        First, the PCB design looks pretty sloppy - hard to tell where the separation is between primary and secondary. Pretty sure this one won't pass UL tests either.

        Next, I can't quite tell the capacity of the primary caps, but looks like 680 uF. If that's the case, I'd say the output will probably become very limited around 350 Watts... maybe 400 with some luck. The label claims 20 Amps max at 24V. That's 480 Watts of output power. I have my doubts this Chinese design will do it without popping. Even peaking that high for more than a few seconds may not be a good idea.

        On the plus side, this looks like a Half-bridge design, but done with MOSFETs. I wonder what kind of efficiency this PSU will get and if there is any improvement over regular BJTs (there should be, I think.)

        Comment


          #5
          Re: Sense Adjustable Switching Power Supply ReCapped finished

          It looks fine, the variable voltage and current would be really useful.
          They put the earth-ground trace between the pri and sec, so that helps the pcb spacings. It has minimal EMI filtering and the smallish output capacitors at 20A ripple? But derate it to less than 500W chinese watts... Usually at 500W power level I am seeing a soft-start (relay) instead of a big NTC because they get hot. But this has a cooling fan.
          True test would be charging a car battery.

          Comment


            #6
            Re: Sense Adjustable Switching Power Supply ReCapped finished

            Momaka and Redwire

            You both have brought some testing that I going to do on this switching power supply maybe in the next couple of days

            Thanks for your feedback

            I have a power supply tester that I going to use on it and slowly increase the current load and see what it can handle and still keep the voltage that it is set to I do want to see what it can handle because I would like to use it as a battery charger for Lithium Ion Battery types and nicad type and maybe sla type so I do need to know just how much abuse it can take

            If I can remember correctly but I think I have shorted the power supply leads together and all it does is shutdown but I am not sure if I have done it this power supply yet or not but I think if I have not done this yet I might have a light bulb in series and do this test to begin with
            Last edited by sam_sam_sam; 11-21-2020, 05:32 AM.
            9 PC LCD Monitor
            6 LCD Flat Screen TV
            30 Desk Top Switching Power Supply
            10 Battery Charger Switching Power Supply for Power Tool
            6 18v Lithium Battery Power Boards for Tool Battery Packs
            1 XBox 360 Switching Power Supply and M Board
            25 Servo Drives 220/460 3 Phase
            6 De-soldering Station Switching Power Supply 1 Power Supply
            1 Dell Mother Board
            15 Computer Power Supply
            1 HP Printer Supply & Control Board * lighting finished it *


            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
            2 Hem Saw Computer Stack Board

            All of these had CAPs POOF
            All of the mosfet that are taken out by bad caps

            Comment


              #7
              Re: Sense Adjustable Switching Power Supply ReCapped finished

              Update to this switching power supply case

              I was not a big fan about the open end where the main power supply input are so

              ( even with the plastic cover over the terminals )

              [ the volt/amp meter module not in a very convenient place for where and how I would like to read the display]

              I have taken a plastic enclosure and cut it to fit the front of power supply input and have the input outlet from an ATX power supply enclosure and a on/off switch moving the volt/amp meter to the plastic enclosure and also put banana jacks for the output voltage

              One note I remove the terminal block that was on the switching power supply board

              So it more user friendly for how I want to use it

              When I finish the modification to this switching power supply project I will post some pictures of it
              Last edited by sam_sam_sam; 03-04-2021, 07:46 PM.
              9 PC LCD Monitor
              6 LCD Flat Screen TV
              30 Desk Top Switching Power Supply
              10 Battery Charger Switching Power Supply for Power Tool
              6 18v Lithium Battery Power Boards for Tool Battery Packs
              1 XBox 360 Switching Power Supply and M Board
              25 Servo Drives 220/460 3 Phase
              6 De-soldering Station Switching Power Supply 1 Power Supply
              1 Dell Mother Board
              15 Computer Power Supply
              1 HP Printer Supply & Control Board * lighting finished it *


              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
              2 Hem Saw Computer Stack Board

              All of these had CAPs POOF
              All of the mosfet that are taken out by bad caps

              Comment


                #8
                Re: Sense Adjustable Switching Power Supply ReCapped finished

                Originally posted by sam_sam_sam View Post
                Momaka and Redwire

                You both have brought some testing that I going to do on this switching power supply maybe in the next couple of days

                Thanks for your feedback

                I have a power supply tester that I going to use on it and slowly increase the current load and see what it can handle and still keep the voltage that it is set to I do want to see what it can handle because I would like to use it as a battery charger for Lithium Ion Battery types and nicad type and maybe sla type so I do need to know just how much abuse it can take

                If I can remember correctly but I think I have shorted the power supply leads together and all it does is shutdown but I am not sure if I have done it this power supply yet or not but I think if I have not done this yet I might have a light bulb in series and do this test to begin with
                The testing will be done shortly in next few days stay tune for more results
                Hopefully I will not see this this would not be a good thing
                Last edited by sam_sam_sam; 03-04-2021, 08:19 PM.
                9 PC LCD Monitor
                6 LCD Flat Screen TV
                30 Desk Top Switching Power Supply
                10 Battery Charger Switching Power Supply for Power Tool
                6 18v Lithium Battery Power Boards for Tool Battery Packs
                1 XBox 360 Switching Power Supply and M Board
                25 Servo Drives 220/460 3 Phase
                6 De-soldering Station Switching Power Supply 1 Power Supply
                1 Dell Mother Board
                15 Computer Power Supply
                1 HP Printer Supply & Control Board * lighting finished it *


                These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                2 Hem Saw Computer Stack Board

                All of these had CAPs POOF
                All of the mosfet that are taken out by bad caps

                Comment

                Working...
                X