Low voltage very high current rails distribution

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts
  • harp
    Badcaps Veteran
    • Jun 2022
    • 596
    • Planet Earth

    #1

    Low voltage very high current rails distribution

    Low voltage very high current rail distribution

    I have some mains toroid transformer220v/12v, and thinking to add a few one-two turns fat coil in parallel, like in picture. Red are working windings, purple (top and bottom) is rails who connect all low voltage windings.

    Question is, how to connect that device to be as much more efficient in spot welder operation to distribute and pulls currents to all winding equaly, minimalize voltage drop?

    output on half E-F
    output on C-B
    connect A-B and C-D, output on A-F
    otherwise?
    Attached Files
    Last edited by harp; 10-27-2023, 02:48 PM.
  • eccerr0r
    Solder Sloth
    • Nov 2012
    • 8688
    • USA

    #2
    Re: Low voltage very high current rails distribution

    if you're planning on rails like that, it doesn't matter, all the same. You get better results if you just weld the wires together into one ring, but if you truly want better you wire all windings to the exact two same points and connecting those to the output wires instead of using a rail. Yes, more wire, but if you want best, that is the best.
    Last edited by eccerr0r; 10-27-2023, 04:56 PM. Reason: reworded for clarity

    Comment

    Related Topics

    Collapse

    • DynaxSC
      Extreme High Current & Low Voltage Short Killer ??
      by DynaxSC
      Hi Folks

      I'm looking for a extreme high current short killer solution for a reasonable cost.

      I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
      After taking off the socket, the shorts dissappear again.
      The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...
      10-15-2024, 10:13 AM
    • DrewPhillips
      SFX PSU - Need High Current on 3.3V & 5V Rails?
      by DrewPhillips
      I have an older system which was built in the Windows 7 era and which has developed, I suspect, a power supply problem. The system had the same problem, random crashes, a couple of years ago, which I subsequently remedied with a new power supply.

      The power supply which came with the machine is a no-name "Safe Power PE-300". It is SFX form factor and claims a high current capacity: +3.3V @ 22A and 5V @30A (the +12V rail claims a meager 16A). Problem is that SFX supplies (or even ATX supplies for that matter) having high current ratings on the 3.3V and 5V rails seem to be...
      02-18-2025, 01:03 PM
    • Document Archive
      Texas Instruments bq24745 bq24745RHDR bq24745RHDT Battery Charger IC for Laptop Computers Datasheet
      by Document Archive
      The bq24745 bq24745RHDR bq24745RHDT is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm x 5 mm QFN package.

      The bq24745 features dynamic power management...
      10-23-2024, 02:50 AM
    • quickname
      Cyberpower 1500AVR UPS repair
      by quickname
      I'd like to start out by thanking this forum for providing the info to be able to repair my 15 year old CP1500AVRLCD UPS. Here is all the info I gathered during my trouble-shooting and re-capping.

      Like clockwork, I've had to replace the SLA batteries every 4 years. It was about that time and the UPS was acting like it needed new batteries... randomly shutting off with AC present, not being able to charge fully, and poor runtime when AC was removed. So, I replaced the batteries but noticed that it was not charging properly.

      I decided to verify that the batteries were...
      11-12-2023, 09:57 AM
    • Instafixx
      Macbook A2179 820-01958
      by Instafixx
      Hi,
      Have a Macbook A2179 with liquid damage. Customer showed it some shop which has done an ultrasonic cleaning of the board.
      The board pulls 0V but doesnt turn on. No Fan SPIN. NOT IN DFU.

      I checked the Power Sequences below and found this -


      Once a valid external power source (Charger or battery) is connected, the following rails will come online.
      PPBUS_G3H: Normal voltage is ~12.6v on the charger with the battery disconnected. Produced from the ISL9240 (U7000, which uses PPDCIN_G3H as its VIN.
      PP3v3_G3H_RTC: Normal voltage is ~3.3v. Produced...
      05-20-2023, 05:19 AM
    • Loading...
    • No more items.
    Working...