Building an EV motorcycle. Batteries: Need opinions.

[P-hack]

Needs more homework if the me0913 will work with the bldc controller I just linked to (bldc is the square wave version of PMAC, so they do often work just fine, not always).

Which spec are you referring to?

[TurnNBurn]

Originally Posted by P-hack

Needs more homework if the me0913 will work with the bldc controller I just linked to (bldc is the square wave version of PMAC, so they do often work just fine, not always).

Which spec are you referring to?

*3-Phase Permanent Magnet Brushless Motor
*24 - 96 Volts
*Efficiency of 92%
*12 KW (180 amps DC) continuous @ 96 Volts
*23 KW for 1 minute (600 amps DC) Peak @ 96 Volts
*Peak Stall Torque of 90 Nm (66 ft)
*Designed for long life. No brush maintenance.
*8" OD, 7.17" long (w/o shaft)
*7/8"x 1-5/8", 3/16" key shaft
*35 Lbs

And when I was looking at motors, I specifically browsed DC versus AC categories. But I've been researching this project for a while and settled on the motor first and then found what controllers would work with it. But I guess the phases were just overlooked. And I guess this link confirms it: http://www.thunderstruck-ev.com/moto...ity-chart.html

But I'll just sell the motor and go with the ME1003. I'm already getting a box to pack it up to get it sold. Man, this thing is heavy.

[Ryland]

I would avoid a Kelly controller, I've seen them cause way to much damage and have yet to talk to anyone who has had good luck with them, at best they fail off and just don't work, worst case they start on fire or fail full on.

[TurnNBurn]

I'm kind of sad. So theres no electrical converters I can get to make it work? I really like this motor and this controller

[rmay635703]

Originally Posted by TurnNBurn

Grrr. I'm still captivated by lead acid. With lead acid there's no BMS required I thought. And I could get some good deep cycle batteries for $120 each and it'd only be about $720. if I go with Life, it's $1200 for the batteries plus another extra chunk for the BMS and chargers.

Get an NiMH pack out of a ford escalp hybrid or chevy tahoo hybrid or whatever. For $350 you get 300v of 6ahr NiMH batteries, which is enough to run a motorcycle.

Yes they weigh more but they are more durable and easier to charge and less dangerous to overdischarge.

Good Luck

[sendler]

Originally Posted by oil pan 4

Endless-sphere is charging $380 for an 8cell pack.
I built my 8 cell pack for $250.

That is pre assembled and with a BMS. Loose amp20 cells are around $25 each shipped.

[TurnNBurn]

I guess I'm still confused how it's still advertised as DC motor and even the specs say it takes DC ("The motor is 92% efficient at voltages between 24 to 96 VDC. Continuous current of 125 amps AC (180 Amps DC into the motor control)") But it's still an AC motor? Can someone explain how that works so I have a better understanding of where I went wrong?

-edit-
I decided to keep the motor and go with a new controller. My original goals were to get more than 72v (faster speeds) and I'd like to stick with that. Looks like I'll be getting a different controller. You say the kelly KBL72501E is compatible? What about the KBL96351E? The KBL96351E seems to be closer to what I need (higher voltage.)

I'm kind of facepalming because the Kelly is what I was looking at originally. I got caught up in the hype of the Alltrax being the most popular (for other motors. I didn't consider that) and the fact that the Alltrax cost less.

[Ryland]

Originally Posted by TurnNBurn

I guess I'm still confused how it's still advertised as DC motor and even the specs say it takes DC ("The motor is 92% efficient at voltages between 24 to 96 VDC. Continuous current of 125 amps AC (180 Amps DC into the motor control)") But it's still an AC motor? Can someone explain how that works so I have a better understanding of where I went wrong?

Do you really know what motor you have?
Does your motor have 2 cable lugs or 3 cable lugs plus small hail sensor wires???

I'm kind of facepalming because the Kelly is what I was looking at originally. I got caught up in the hype of the Alltrax being the most popular (for other motors. I didn't consider that) and the fact that the Alltrax cost less.

Alltrax controllers have a lot of hype because they don't tend to fail, Kelly controllers fail, I was talking to someone on Sunday who gave up on the kelly controller after paying to mail it back and getting a 2nd dud, friend of mine got a great deal on a near complete electric car after a Kelly controller burned up as the car sat over night and destroyed a $3,000 Netgain motor, look at EVAlbums.com and search kelly controllers and see how many people have had them be a costly mistake.

[TurnNBurn]

Originally Posted by Ryland

Do you really know what motor you have?
Does your motor have 2 cable lugs or 3 cable lugs plus small hail sensor wires???



Alltrax controllers have a lot of hype because they don't tend to fail, Kelly controllers fail, I was talking to someone on Sunday who gave up on the kelly controller after paying to mail it back and getting a 2nd dud, friend of mine got a great deal on a near complete electric car after a Kelly controller burned up as the car sat over night and destroyed a $3,000 Netgain motor, look at EVAlbums.com and search kelly controllers and see how many people have had them be a costly mistake.

It's definitely an ME0913 with 3 cable lugs and the sensor wiring. 100% sure of that.

I'm second guessing my choice of the kelly controller since I've been researching them more. I don't like to google "[product] problems" because all I'll find are problematic posts. I can do this with any brand. I'm sure I can find people who hate Alltrax. But Kelly seems to be problematic with a lot more than I care to deal with. So I think I'll stick with the Alltrax and sell the motor. I'll be limited on speed, but I can upgrade the motor to something else compatible in the future.

[Ryland]

I haven't searched for issues with Alltrax controllers but when I read about EV's I see that there are people who have 1000's of miles on them with Alltrax, then I have people walk up to me and start going off on how their Kelly controller failed and meet people who's Kelly controller looks like someone took a cutting torch to it and see the other damage it caused and I look around for people who are HAPPY with the Kelly controller and I fail to find the happy EV builders other then a few people who have way over sized Kelly controllers on E-bikes... way over sized on a bicycle, not hard to do.

But that is why EValbums is nice, you sort by part brand and you see everyone who has it and you see how it performs and you see their notes about issues.