01-21-2011, 02:42 PM
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#331 (permalink)
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Master EcoModder
Join Date: Sep 2009
Location: Ireland
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I did a little video today showing the charger pumping 20amps into my headway pack and hitting cv almost bang on. Yet another boring video brought to you by Bauer studios 
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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02-25-2011, 08:49 AM
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#332 (permalink)
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ReVolt Enthusiast
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Quote:
Originally Posted by adamj12b
The design that is currently being worked on is a Boost type PFC power supply. It takes 90-260VAC and while power factor correcting it, boosts the voltage to 400VDC and stores it in the bus.
I will try and get the schematics posted.
-Adam
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Hi Adam,
How's the development of the PFC Charger going?
Did you ever get the prototype PCB that you ordered?
Hope all is well,
-Mark |
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02-25-2011, 10:07 AM
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#333 (permalink)
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EcoModding Lurker
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hello
jackbauer
It is possible to charge with your battery charger the LIPOFE4 battery
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02-25-2011, 02:49 PM
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#334 (permalink)
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Master EcoModder
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If you mean LIFEPO4 batteries then yes of course. Thats what its doing in the video in the post above
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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02-25-2011, 02:50 PM
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#335 (permalink)
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Master EcoModder
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Quote:
Originally Posted by sawickm
Hi Adam,
How's the development of the PFC Charger going?
Did you ever get the prototype PCB that you ordered?
Hope all is well,
-Mark
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Hey Mark,
Big post coming on both threads. Probably tonight.
-Adam |
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02-25-2011, 03:17 PM
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#336 (permalink)
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EcoModding Lurker
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Location: Slovenija
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how do you configure the charger for the lifepo4 battery.
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02-26-2011, 12:10 PM
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#337 (permalink)
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EcoModding Lurker
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Hello
jackbauer
On your video I can see that is no more blinking LCD display. Do you have the new FW for the charger. Besause when I switch my charger every light in my home blinkig on the 1 second
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03-09-2011, 07:54 AM
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#338 (permalink)
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Master EcoModder
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Quote:
Originally Posted by adamj12b
Hey Mark,
Big post coming on both threads. Probably tonight.
-Adam
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I have posted an update on my thread.
http://ecomodder.com/forum/showthrea...res-13013.html
I will be starting research on PFC as well over there for those interested.
-Adam |
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05-03-2011, 10:22 AM
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#339 (permalink)
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EV Connoisseur
Join Date: Aug 2010
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Dumb question
May I ask a probably dumb question:
If I use the open revolt controller as a voltage controller for a charger then the PWM duty cycle would control the voltage that is put out, right?
At 50% duty cycle an 100V input would result in an output voltage of 50V.. in theory...
If I have a Lithium pack with a BMS, for the balancing phase of the BMS the amps must be maximized at 3A.. how can that be accomplished?
My theory is that when I have one cell that is 3.2V nominal and 4.0V max if I charge it with 4.2 volts the amps would be 10A or so.. and the only way to control the amps is to lower the voltage.. say at 3.9V charging voltage the amps would be 2A..
Is that how it works?
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05-03-2011, 10:29 AM
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#340 (permalink)
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Master EcoModder
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Well the revolt's hardware is almost capable of being a battery charger. You will need to add voltage measuring inorder to be a real charger. Also, you will need to modify the firmware to ro read the voltage.
Currently the revolt is basically a constant current power supply. The duty cycle is always changing to maintain a steady current output.
You are correct about the duty cycle output. 50% duty would be 50% input voltage coming out.
Yes, As the voltage gets closer to the cells voltage, less current will flow.
-Adam
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