neptronix wrote:Damn, now you got me wanting a 26" pie pretty badly. I haven't tried mine on 24S yet but on 20S i am only hitting 32mph fully charged.
The upside is that it does go like a rocket. I had to tune the phase amps down because wheelies were a major issue. Despite that, it's not an optimal setup
At 80 amps x 24S, you are pushing almost as much power as i did - 8kW @ 65A x 30S ( 115v nominal ). I am a little stunned yours has lived though due to the larger diameter. I'd like to see what kind of winding temps you are seeing - have you installed a temp sensor yet?
These motors are sleepers and are totally under appreciated. I can't seem to convince golden motor to make a slightly faster wind.. cuz that could dominate pretty much all ebike hub motors other than the 53xx, 54xx, and greyborg hubzilla.
Tommy L wrote:Hey there NEPTRONIX!
I watched your Pie video. Did you have a Delta/Wye switch in that Pie? Sounded like you get up to a certain speed then hit a switch.
And what controller for 115v? I'm just about to purchase the 18fet 4115 from Lyen so I can go above 100v. Some here on the forum say
speed just use a faster wind and stay under 100v and use 4110 fets. I like HV..... Your thoughts?
And so this doesn't look like a high jack.... I'm thinking of getting a Magic Pie. do you know the winding count? I'm guess 7 or 8?
Tommy L sends...
neptronix wrote:Hey Tommy.
No, i do not have a delta switch That's the 3 speed switch that comes standard with cell_man's throttles. I hit my 100% speed switch in that video because i was nervous about wheelies initially ( the phase amp to battery amp ratio was set way too high from the factory )... i love how it just kicks you in the pants from 60% to 100%.. that powerband is nice and wide
The 4115 18FET is how i get up to 130v fully charged.
You guys are pushing your 26" pies pretty freaking hard on 24S doing 45mph or over - i think you will hit up against a limit much further than that. My big 8kW is just a peak, sustained i only see 2000-3500w going such low speeds.
I don't know what the turn count is on the pie, but they use the same winding for every size wheel, and the smaller the wheel, the better. It's close to the Crystalyte HT or the nine continent 2810 i believe.. 18mph on 36v with a 26" wheel.
neptronix wrote:Dude, the first time i plugged in a 33a 9FET / 57v ( 15S ), it was doing wheelies right off the bat. I have heavy BMX handlebars titled very far forward & down low for a reason
Tommy L wrote:neptronix wrote:Dude, the first time i plugged in a 33a 9FET / 57v ( 15S ), it was doing wheelies right off the bat. I have heavy BMX handlebars titled very far forward & down low for a reason
Awhhhh man.... you Duded me! lol
snellemin wrote:Dude. Highest Amp reading thus far.
snellemin wrote:Enjoyed the vid man. That was a nice quick ride.
Blackssr wrote:2) I have the 1420i charger and charge in 2 stages: 14S and 6S. This takes about 3 hours for about 10 amp/hours of use. Do you know of a way to charge the entire pack as a whole with balancing? Can this even be done?
Regards, and thanks in advance
Tommy L wrote:Blackssr wrote:2) I have the 1420i charger and charge in 2 stages: 14S and 6S. This takes about 3 hours for about 10 amp/hours of use. Do you know of a way to charge the entire pack as a whole with balancing? Can this even be done?
Regards, and thanks in advance
Lots of threads here on the charging subject in the battery section I believe. But from what I've read and what I do......
Parallel your packs and get a parallel JST-XH board as well. Not sure how your 14s pack is configured? 2 7s? and then the 1 6s?
Most will stick to a 6S config pack and series them for their voltage then parallel for their capacity.
The way you charge is to reconfigure and bring the series down and do more parallels then parallel the JST-XH thru a board or pigtails.
example: if you have 8 6s packs and you series and parallel for riding in a 24s2p config then for charging you reconfig the pack from
the 24s2p to a 12s4p to charge
I hope this helps.... BE CAREFUL and KNOW WHAT YOU ARE DOING!
Tommy L sends.... \\m//
parajared wrote:I have had a mostly good experience my magic pie 2. It's easier to install larger phase wires than 9c due to the open shaft design. It takes less time to shed heat off than 9c, and it heats up less quickly than 9c on the uphills (I may change my mind once my 2810 9c arrives).
I have broken spokes on my pie and not my 9c, and I have burnt up hall sensors on both 9c and magic pie.
I was hoping to go to sensorless, but it sounds like you fellas are having trouble with your controllers. Do you think sensorless is worth the jump?
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