588,582 active members*
12,608 visitors online*
Register for free
Login

Thread: torodial output seems odd

Results 1 to 4 of 4
  1. 04-22-2005, 02:13 AM #1
    trubleshtr
    trubleshtr is offline Registered
    Join Date
    Mar 2004
    Posts
    564

    torodial output seems odd

    I just put 120vac into my torodial.
    got 45 vac out of it
    put that onto rectifier, got 40Vdc out of rectifier??
    Does this seem right?

    I thought this was the math to ball park the output of the rectifier.

    45vac out of torodial x 1.414 = 63.63 volts dc from rectifier?

    can someone explain this to me please. (chair)
    menomana
    Reply With Quote Reply With Quote
  2. 04-22-2005, 02:19 AM #2
    Al_The_Man's Avatar
    Al_The_Man
    Al_The_Man is offline Community Moderator
    Join Date
    Dec 2003
    Posts
    24221
    The 1.414 multilplier only applies to a capacitive smoothed supply, in other words if you are measuring just AC ripple after the bridge, you are now measuring the RMS of a 120Hz ripple, put an electrolytic cap on the bridge output and you will now read the peak, which is RMS x 1.414 less voltage drop for the rectifiers.
    Al
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.
    Reply With Quote Reply With Quote
  3. 04-22-2005, 02:22 AM #3
    trubleshtr
    trubleshtr is offline Registered
    Join Date
    Mar 2004
    Posts
    564
    Thanks Al.
    So would that be 40 vdc x 1.414
    or
    45 vac x 1.414
    after I place the caps in the loop?
    menomana
    Reply With Quote Reply With Quote
  4. 04-22-2005, 02:42 AM #4
    Al_The_Man's Avatar
    Al_The_Man
    Al_The_Man is offline Community Moderator
    Join Date
    Dec 2003
    Posts
    24221
    Your DC should read approx (45x1.414)-2 . The -2 is to allow volt drop for the two diodes.
    Al
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. I need to build a paper tape emulator
    By paramax55 in forum CNC Machine Related Electronics
    Replies: 14
    Last Post: 04-11-2007, 10:40 PM
  2. 8830 Line driver for encoder output?
    By murphy625 in forum CamSoft Products
    Replies: 4
    Last Post: 03-29-2005, 08:15 PM
  3. Dirction / Step lines!
    By bigal in forum CNC (Mill / Lathe) Control Software (NC)
    Replies: 2
    Last Post: 02-06-2005, 08:51 PM
  4. Power Supply, Output
    By Sanghera in forum CNC Machine Related Electronics
    Replies: 6
    Last Post: 05-31-2004, 06:44 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules