×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

making a custom transformer for a switched power supply

making a custom transformer for a switched power supply

making a custom transformer for a switched power supply

(OP)
Hey guys.

I am in need of a regulated 1000 volt power supply, that can be easily controlled with an op-amp. I intend to build the op-amp booster circuit listed in Figure 10, pages 7-8 of this document from National Semiconductor:

http://www.national.com/an/AN/AN-272.pdf
Its listed as the "son of godzilla booster" or "1000V 300mA Booster"

This is a 1000v, 300mA output, op-amp booster circuit, which uses regulated +15 and -15 volt sources, and using a controller IC and some power PNP transistors, it drives a step-up transformer at 20kHz, to step up the 30 volts to 1000Vdc after its sent to the full wave rectifier. The only problem is that this ty-85 power toriod made my Triad Magnetics, isnt made anymore, so I need to make my own 20kHz 300 watt transformer.

I found this EFD30 transformer core, which was rated for 297 watts on the datasheet, and I was wondering if this would be a good core to make my transformer on.

What want to know, is what impedance's should i be looking at for my primary and secondary windings, and how close to core saturation should I be? And whatever else essentially so I need to know about transformers, as this will be my first time winding one.

in case anyone was interested, here is the information on the ty85 transformer that the circuit calls for: http://triadtransformers.com/tr8586.html
(its kinda hard to find, you have to scroll down and by trial and error find page 22, which has the ty-85 transformer listed)

any help will be greatly appreciated.
thanks,

Robby

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources