What to get? Magic pie or 48V 1000W?

[Jazzjerry]

Watched it all the way to the end, just to get to know your neighbourhood.   lol 

Looks nice. I like your GM rack woody nr3...

and the whole DIY factor of it all...

Dont listen to people that tell you and sell you the whole thing as 1

DIY

Greetz JJ

[Jazzjerry]

P.s. Since it is 2010 now,,,,,, My eyebrows did grow back....


Trust me .....   So don't hold back.... DIY

[SilverSurfer]

Ok folks,  I have the 48v 1000w hub.    I have my CA-DP properly calibrated.  My tire properly calibrated.  Have made some changes to my system as Ive worked along,  and heres where Im at.  

I got the 48/1000  ran with GM stock controller,  weanie...

Traded up controller from stock to Infineon 36-48/72v 45a.   Still on 48v.   Ran solid!   Fresh batteries took me up to 31mph, leveled off at a solid 27 mph.   No problems.   Wattage was high,  but heat was not excessive, and no issues at all.   I would say it could handle that contoller all day long without issues.   I was concerned at first because the watts were so high compared to the 1000 watt rating, but it barely got more than nicely warm.

Upgraded batteries to 72v (on that infineon controller its just a flip of a switch to change the voltage ability).   She came ALIVE!!!   top speed on flat is now 37 mph!  She goes like crazy!   If I push it realy hard alot she gets very hot,  I try to keep the big speed down to short runs with cool down time.   She goes so fast now, I question my desire for more speed.   Today I went the fastest Ive ever gone on a bike,



This was with the downhill help, as I said,  my normal top speed is 37 mph.  


by the way,  I weigh 350+ lbs and my bike has 6 12v 18ah sla's on it.    can Magic Pie do that?  

[Bikemad]

She came ALIVE!!!   top speed on flat is now 37 mph!
She goes so fast now, I question my desire for more speed.

can Magic Pie do that?  

The Magic Pie seems to have plenty of torque, but not as much speed.

My Magic Pie won't even run at all if the battery voltage is over 60V, and its current is also limited to just over 20Amps max regardless of the voltage!

So without a major rewire and a different controller it simply cannot compete with that sort of speed.

Hot battery messures 79v hit 55 amps peak hot of the press, 4345 watts actual!  I didnt get over 32 mph cruise on flat,  so the top speed was the same as 48v,   but with the 12 FET Instant Start Infineon controller and 72v of SLA's, she was able to hit that and keep it all the way to work,  where as with 48v once the batteries got warmed up the cruise speed slimmed down to around 27mph.

So what has changed to get the extra speed out of it now?

Alan
 

[GM Brazil]

Using a Watt metter my pie shows 30A of max current

[Bikemad]

Using a Watt meter my pie shows 30A of max current

I tried several different battery combinations, but according to my watt meter, my maximum current was only 20.33Amps:
Battery      No load voltage    Max Amps    Min Volts    Max Wattage
24V SLA       25.76        20.14     23.09        465
25.9V LiPo    27.30        20.29     25.80        525
36V SLA       38.70        20.21     34.79        703
48V SLA       51.50        20.33     44.99        915
48.1V LiPo    50.30        19.85     47.75        949
55.5V LiPo    58.70        20.08     55.51       1115
59.2V LiPo    61.63 voltage too high to test (the Pie refused to work!)

I don't know if it's a software limit programmed into the controller or whether it's limited by the controller's components, but it would be really nice to know why they are different and whether it can be easily adjusted.

Alan