Author Topic: voltage trouble  (Read 1508 times)

0 Members and 1 Guest are viewing this topic.

winddreamer

  • Newbie
  • *
  • Posts: 6
voltage trouble
« on: June 28, 2007, 10:05:27 PM »
i have a 10' 24 N42 magnet 70 turn coils i have problem. i am getting 35-45 ac volts between phases but when i hook up the rectifiers i am only getting 4-5 dc volts out the rectifier. part # is 36MB80A / if that helps i hooked them up according to this page http://otherpower.com/rectifier.html any ideas on what I have done wrong?  


thanks for the help

« Last Edit: June 28, 2007, 10:05:27 PM by (unknown) »

hiker

  • Hero Member
  • *****
  • Posts: 1661
  • BIG DOG
Re: voltage trouble
« Reply #1 on: June 28, 2007, 04:35:46 PM »
could be a bad rect..or a missed wired one????????

thats my guess...heres a digram..you could use three rects ...instead of just the two

« Last Edit: June 28, 2007, 04:35:46 PM by (unknown) »
WILD in ALASKA

snowcrow

  • Full Member
  • ***
  • Posts: 190
Re: voltage trouble
« Reply #2 on: June 29, 2007, 05:22:25 AM »
It sounds like you might have the leads reversed on one phase on the DC side of a rectifier bridge?




« Last Edit: June 29, 2007, 05:22:25 AM by (unknown) »

luv2weld

  • Sr. Member
  • ****
  • Posts: 308
Re: voltage trouble
« Reply #3 on: June 29, 2007, 08:21:20 AM »
I'm thinking hiker is right. But more info or a picture would be helpful.

Has it ever worked properly and now isn't??? If it never worked right,

disconnect everything and then following the page you referenced, hook it

up again and check the output. If it did work properly once, then it is a

bad rectifier. In reference to hikers picture, I would not use the diagram

on the left (only 2 rectifiers). If the rectifier with 2 wires shorts out,

you instantly put the brakes on. Had it happen to me. Now I use 3 rectifiers.

Do you know how to check the rectifiers using a multimeter??


Ralph

« Last Edit: June 29, 2007, 08:21:20 AM by (unknown) »
The best way to "kill time" is to work it to death!

Flux

  • Super Hero Member Plus
  • *******
  • Posts: 6275
Re: voltage trouble
« Reply #4 on: June 29, 2007, 01:54:15 PM »
Does the thing become difficult to turn when you connect the rectifier?. If it does then you have connected it wrongly or it is faulty.


I believe there are cheap rectifiers out there with wrongly marked connections, that would really cause confusion.


Also check that all three ac voltages are equal.  Make sure you are measuring the output of the rectifier on the DC volts range.


Flux

« Last Edit: June 29, 2007, 01:54:15 PM by (unknown) »

winddreamer

  • Newbie
  • *
  • Posts: 6
Re: voltage trouble
« Reply #5 on: July 06, 2007, 02:15:09 PM »
i have replaced the rectifiers and all seems to be ok now

i found the first ones  in a old box at work must of been burnt out
« Last Edit: July 06, 2007, 02:15:09 PM by (unknown) »