Half bridge smps voltage drop problem - Page 7

N-Channel · 29th March 2006, 02:34 AM

That's not a bad idea. Especially, since I have enough to make roughly 5kW worth of a 60Hz stage of a 120/240V AC Inverter

Eva · 29th March 2006, 03:34 AM

subwo1 · 29th March 2006, 08:00 AM

Sounds like you're set to go, Steve.

N-Channel · 29th March 2006, 02:47 PM

Sure, now alls I need is a good control circuit, assorted support components, big Ls and Cs (I want sinewave out with reasonably high efficiency), and a good case to put it in.

I was thinkin' of PWM'ing the output stage at something like 30-36kHz, while modulating that at 120Hz, then some big Ls & Cs to recover the 60Hz component. Obviously, for a power level of 5-10kW, I would need some very big components. Not wanting to get too far off-thread, this may have relevance with Alex's original questions.

subwo1 · 29th March 2006, 03:52 PM

Indeed, getting decent efficiency at high power can become less fun, especially because of increases in size and parts cost.

Sultan OUTIM · 4th October 2012, 05:28 AM

I AM SUFFERING WITH THE SAME PROBLEM THAT IS PERSISTING WITH ALEX IN THIS POST.
I HAVE USED TWO SWITCH FORWARD CONVERTER
RATING IS 24V AND 14A.
WITH A MERE 20 OHM LOAD THE VOLTAGES ARE FLUCTUATING.
ML4800 PWM+PFC IC HAS BEEN AS CONTROLLER

Salas · 4th October 2012, 05:35 AM

Welcome to the forums. Please don't use full text capital letters again when posting. There is a ''rules'' section to read in the top page menu to be generally informed too.

29th March 2006, 08:00 AM	#63
subwo1 diyAudio Member Join Date: Jan 2002 Location: North American Continent	Sounds like you're set to go, Steve. __________________ USMPS http://groups.yahoo.com/group/switchmode/

29th March 2006, 03:52 PM	#65
subwo1 diyAudio Member Join Date: Jan 2002 Location: North American Continent	Indeed, getting decent efficiency at high power can become less fun, especially because of increases in size and parts cost. __________________ USMPS http://groups.yahoo.com/group/switchmode/

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29th March 2006, 02:34 AM	#61
N-Channel diyAudio Member Join Date: Mar 2003 Location: Sol System	That's not a bad idea. Especially, since I have enough to make roughly 5kW worth of a 60Hz stage of a 120/240V AC Inverter

29th March 2006, 03:34 AM	#62
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea

29th March 2006, 02:47 PM	#64
N-Channel diyAudio Member Join Date: Mar 2003 Location: Sol System	Sure, now alls I need is a good control circuit, assorted support components, big Ls and Cs (I want sinewave out with reasonably high efficiency), and a good case to put it in. I was thinkin' of PWM'ing the output stage at something like 30-36kHz, while modulating that at 120Hz, then some big Ls & Cs to recover the 60Hz component. Obviously, for a power level of 5-10kW, I would need some very big components. Not wanting to get too far off-thread, this may have relevance with Alex's original questions.

4th October 2012, 05:28 AM	#66
Sultan OUTIM diyAudio Member Join Date: Oct 2012	I AM SUFFERING WITH THE SAME PROBLEM THAT IS PERSISTING WITH ALEX IN THIS POST. I HAVE USED TWO SWITCH FORWARD CONVERTER RATING IS 24V AND 14A. WITH A MERE 20 OHM LOAD THE VOLTAGES ARE FLUCTUATING. ML4800 PWM+PFC IC HAS BEEN AS CONTROLLER

4th October 2012, 05:35 AM	#67
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Welcome to the forums. Please don't use full text capital letters again when posting. There is a ''rules'' section to read in the top page menu to be generally informed too.