square wave inverter and cfl buzz

[lentildude]

I am running a cfl off a 300w 12v inverter in a solar offgrid situation.
The 300w inverter is a not true sinewave but a square wave type.

Everything works well, nothing gets too hot but I get annoying buzz sound.
I have tried a few different CFLs still the same buzz.

Is there a way to filter out bad harmonics without wasting power or
sacrificing efficiency?

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Posted at www.usenet.com.au

 

[Franc Zabkar]

On Sun, 1 Nov 2009 01:09:18 +0000 (UTC),
Y29mZmVleHh4QGhvdG1haWwuY29t@REGISTERED_USER_usenet.com.au
(lentildude) put finger to keyboard and composed:

I am running a cfl off a 300w 12v inverter in a solar offgrid situation.
The 300w inverter is a not true sinewave but a square wave type.

Everything works well, nothing gets too hot but I get annoying buzz sound.
I have tried a few different CFLs still the same buzz.

Is there a way to filter out bad harmonics without wasting power or
sacrificing efficiency?

If it helps, here are a few CFL circuits:
http://pavouk.org/hw/lamp/en_index.html

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Mickel]

"lentildude" <Y29mZmVleHh4QGhvdG1haWwuY29t@REGISTERED_USER_usenet.com.au>
wrote in message news:hcin3u$rl0$1@news.eternal-september.org...

I am running a cfl off a 300w 12v inverter in a solar offgrid situation.
The 300w inverter is a not true sinewave but a square wave type.

Everything works well, nothing gets too hot but I get annoying buzz sound.
I have tried a few different CFLs still the same buzz.

Is there a way to filter out bad harmonics without wasting power or
sacrificing efficiency?

http://www.led-cfl-lighthouse.com/page/1435725
An option is purchase 12V CFLs. I found these to be good but the rating of
30W is not true, closer to 20W in my experience. Still eqivelant to a 100W
bulb in the old money.



Michael