Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

SMPS for motorcycle intercom: some questions
SMPS for motorcycle intercom: some questions
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 2nd September 2005, 12:08 PM   #11
DaBit is offline DaBit  Netherlands
diyAudio Member
Join Date: Aug 2005
Send a message via ICQ to DaBit
OK, so a flyback can be done also.

I'm wondering: how much cost or space does a flyback really save when compared to a single transistor (transformer with reset winding) forward converter or push-pull?

The flyback topology uses the least number of components, but is it really cheaper or smaller? I always used postfiltering on the secondary voltages using an LC filter to reduce supply noise.

The forward converter also needs a buck inductor which can be dimensioned for the required noise levels. It also seems that it needs less capacitance on the secondary side when the buck inductor is used in continuous mode.

With push-pull and current mode control the duty-cycle can probably be increased to 80% or more (at Vin,min), which means a lower RMS current through the capacitors, and thus smaller capacitors. I also doubt that I would need post-filtering. I could also use a smaller core, if I can get anything else than ETD29. Also, switch power dissipation is split over two switching devices, reducing the amount of copper area required for cooling. The extra cost would be twice the amount of windings on the transformers (but magnet wire diameter can be lower due to recued I2R losses) and a second MOSFET or transistor.

This is not based on any math or knowledge, just ideas.

Any comments?
  Reply With Quote


SMPS for motorcycle intercom: some questionsHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Intercom sound system help FerisB Everything Else 4 22nd June 2009 02:20 PM
Motorcycle intercom. Faulty POT rmim Everything Else 1 15th October 2008 08:09 PM
SMPS questions sakistsalikis Power Supplies 3 9th March 2007 11:54 PM
Motorcycle Intercom Input Mixer w/Override HiOSilver Chip Amps 4 30th September 2006 11:19 AM
SMPS questions gaplessophile Chip Amps 5 4th April 2006 01:41 PM

New To Site? Need Help?

All times are GMT. The time now is 10:26 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio