Nuts&Volts
100 W
Ok quick intro. I mainly just browse and read on ES. Lot of great info. I am more active over on ElMoto.net. I have an electric motorcycle that I have upgraded to a 21s or 22s pack of lithium (3.7V) cells and will have 100Ah on board. I have been looking around for a charging solution for awhile now and the 3kW HP PSUs that liveforphysics first introduced were the cheapest and most powerful option available. So I bought 2 of the PSU and also 3 DC/DC (48to48) converters that Doc linked in his other thread. My plan is to have 1 PSU onboard (removable) with the 3 DC/DC. This gives me a 1.5kW charging system that fits on board if I need it. Then I will leave the other PSU at home so i can bypass the DC/DC's and run both PSU in series for a ~4 to 6kW charge on my 8kWh pack. Fortunately we had a hot tub that was run on a 220V 50A breaker so we are going to reroute this to the garage and I can have a nice "fast" charger setup at home
Specs of PSU -
Output - 2950W, 51.4V, 57A
Input - 200-240, (but LFP has stated that it can be run on 110)
12.4 lbs (measured)
21.625" x 4.75" x 2.75" (measured)
Planned Mods
Voltage adjustment - Would like to have down to 45V if possible
Current limit - modify shunt or, more ideal, install a pot on the current sensing circuit to trick the current reading.
On/off switch - just involves shorting the right two pins from what I've read (think i know which pins to connect)
So what I need help with is figuring out these mods. I have located two pots internal to the PSU and will test them once I have a power cord created. Should I build an AC power cord with a 220V 30/50A plug and then build an adapter for that to a standard 110V NEMA plug? or vice versa?
Also which pin is which on the AC input?
Here are a bunch of random pics so far http://s194.photobucket.com/albums/z160/buckboom00/
I included a few of the PCB's and the pots I located on the boards
Specs of PSU -
Output - 2950W, 51.4V, 57A
Input - 200-240, (but LFP has stated that it can be run on 110)
12.4 lbs (measured)
21.625" x 4.75" x 2.75" (measured)
Planned Mods
Voltage adjustment - Would like to have down to 45V if possible
Current limit - modify shunt or, more ideal, install a pot on the current sensing circuit to trick the current reading.
On/off switch - just involves shorting the right two pins from what I've read (think i know which pins to connect)
So what I need help with is figuring out these mods. I have located two pots internal to the PSU and will test them once I have a power cord created. Should I build an AC power cord with a 220V 30/50A plug and then build an adapter for that to a standard 110V NEMA plug? or vice versa?
Also which pin is which on the AC input?
Here are a bunch of random pics so far http://s194.photobucket.com/albums/z160/buckboom00/
I included a few of the PCB's and the pots I located on the boards