Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

arnolde · 06-03-2009, 02:59 AM

Thanks a lot for the literature :-)

Okay I guess a dedicated PWM controller is too complicated (or in fact, too time consuming to read all the design sheets and decide on a design to use) for me right now, too. Since the critical part is the power switching part, I think I'll also use a 555 to start with until I've proven that the whole thing works as I plan. Still nobody seems to beleive I can build a 3000W PSU for under 500 EUR so I'm itching to prove them wrong ;-)

I'll draw up a circuit and order components now. The 2 coils will come from USA (150µH, 30A, 16 EUR each) and the capacitors are also on the expensive side (400V/560µF, almost 10 EUR each)

Say, how do you power your NE555? Seperate battery/PSU or from the high voltage? I think I'll add a little 5$ transformer to provide dual 15V, then I can use a hall sensor too later if necessary.

I think I'll start with 48kHz PWM frequency (3,3k / 10nF)

Say, those transformer like things, are those your 150µH coils? According to the datasheet they should look quite different... http://www.vishay.com/docs/34022/ihv.pdf

06-03-2009, 02:59 AM	#78 (permalink)
arnolde EcoModding Lurker Join Date: May 2009 Location: Germany Posts: 21 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks a lot for the literature :-) Okay I guess a dedicated PWM controller is too complicated (or in fact, too time consuming to read all the design sheets and decide on a design to use) for me right now, too. Since the critical part is the power switching part, I think I'll also use a 555 to start with until I've proven that the whole thing works as I plan. Still nobody seems to beleive I can build a 3000W PSU for under 500 EUR so I'm itching to prove them wrong ;-) I'll draw up a circuit and order components now. The 2 coils will come from USA (150µH, 30A, 16 EUR each) and the capacitors are also on the expensive side (400V/560µF, almost 10 EUR each) Say, how do you power your NE555? Seperate battery/PSU or from the high voltage? I think I'll add a little 5$ transformer to provide dual 15V, then I can use a hall sensor too later if necessary. I think I'll start with 48kHz PWM frequency (3,3k / 10nF) Say, those transformer like things, are those your 150µH coils? According to the datasheet they should look quite different... http://www.vishay.com/docs/34022/ihv.pdf Attached Thumbnails Last edited by arnolde; 06-03-2009 at 07:02 AM..