Search found 24 matches

by Pedrohlt
Mar 18 2017 9:54pm
Forum: Stand-up E-scooters and E-skateboards
Topic: belt vs chain drive for E-MTB
Replies: 9
Views: 1987

Re: belt vs chain drive for E-MTB

Yes, it sounds like chain drive is the way to go for off-road use. I prefer belt drives, but I think it will limit my use. Thanks everybody for the help!
I think I'm gonna use #25 chain and 6.3:1 ratio.
I'll post some pics of my board when it's complete.
by Pedrohlt
Mar 10 2017 8:47am
Forum: Stand-up E-scooters and E-skateboards
Topic: belt vs chain drive for E-MTB
Replies: 9
Views: 1987

Re: belt vs chain drive for E-MTB

Yes, that was my first tought, but I searched here on ES and there is a lot of belt driven MTBs. I wonder if they're having problems with dirt, rocks etc.
by Pedrohlt
Mar 06 2017 8:13am
Forum: Stand-up E-scooters and E-skateboards
Topic: belt vs chain drive for E-MTB
Replies: 9
Views: 1987

belt vs chain drive for E-MTB

So I'm building a dual drive E-MTB and I'm not sure if I use chain/sprokets or belt/pulley for drive. Here are some of the pros that I could think of each one: BELT: - Quieter - Smoother - Less prone to fall off - Less maintenance ? - Lighter ? - Less sensitive to misalignment CHAIN: - Cheaper - Nar...
by Pedrohlt
Jan 11 2017 2:29pm
Forum: Stand-up E-scooters and E-skateboards
Topic: E-MTB with dual 5065 motor???
Replies: 7
Views: 1303

Re: E-MTB with dual 5065 motor???

My two sensored 5065 motors arrived last week. Didn't test it yet, but it looks really nice. I notice that it's much harder to turn it by hand than my other 5065 motor (from hobbyking). You can really feel the magnets when turning it, I don't know if it has stronger magnets or smaller airgap, but th...
by Pedrohlt
Oct 19 2016 6:49am
Forum: Stand-up E-scooters and E-skateboards
Topic: E-MTB with dual 5065 motor???
Replies: 7
Views: 1303

Re: E-MTB with dual 5065 motor???

Thanks for your reply. Yes, a MTB would draw much more power than a regular longboard. But my idea it to limit the motor current at 60A, so it would run at about 1300W on each motor. My concern is how to limit the current on those FVT ESCs and if a 5065 can handle 1300W of continuous.
by Pedrohlt
Oct 17 2016 12:28pm
Forum: Stand-up E-scooters and E-skateboards
Topic: E-MTB with dual 5065 motor???
Replies: 7
Views: 1303

E-MTB with dual 5065 motor???

I'm thinking about making a E-MTB with: -2x 5065 270kV sensored motors ( https://goo.gl/G0ZmFk ) -2x FVT 80A 6S sensored ESC ( https://goo.gl/PSk2oW ) -3x 6S 5000mAh LiPO for 22.2v 15Ah -Gearing for 25mph My idea is to run at about 1200W max on each motor, to avoid overheating. With the 80A esc, the...
by Pedrohlt
Apr 10 2016 11:05pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Hub motors for stand-up e-scooter
Replies: 12
Views: 2166

Re: Hub motors for stand-up e-scooter

Try http://www.uumotor.com. They have hub motors from 4" to 16", many different models. They even have hub motors for e-skateboards.
by Pedrohlt
Apr 03 2016 6:10pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Programming X-Car Beast 120A ESC w/o card
Replies: 9
Views: 2118

Programming X-Car Beast 120A ESC w/o card

Does anybody know how to program the Hobbyking X-Car Beast 120A esc without the programming card? There is nothing on the manual and I searched but didn't find much info about this ESC.
I d like to change some settings like braking, cutoff and timing.
by Pedrohlt
Dec 11 2015 1:36am
Forum: E-Bike Technical
Topic: 24v controller cutting power at 25km/h
Replies: 4
Views: 691

Re: 24v controller cutting power at 25km/h

Yes, I said that to him, but he wants to use the original controller.
by Pedrohlt
Dec 11 2015 12:56am
Forum: E-Bike Technical
Topic: 24v controller cutting power at 25km/h
Replies: 4
Views: 691

24v controller cutting power at 25km/h

Hi everyone, A friend of mine has a 250W ebike that cuts power everytime it reaches 25km/h and when it gets to ~21km/h it accelerates again to 25km/h. It's kind of a speed limit and to save battery I think. This ebike doesn't have throttle, it's just PAS controlled. He sent me its controller to try ...
by Pedrohlt
Jan 05 2015 2:46pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Kollmorgen 24v 400w brushless for skateboard?
Replies: 19
Views: 5518

Re: Kollmorgen 24v 400w brushless for skateboard?

I'm using two kollmorgen 400W on my E-Mountainboard. I'm running on a 52.8v 12Ah LiFePO4 pack and using two 12fet leyn controllers. The great thing about these motors is the price, I paid about 20 usd on each as I bought it stated as deffective, but as most of the times, only the internal controller...
by Pedrohlt
Dec 04 2014 4:48pm
Forum: E-Bike General Discussion
Topic: em3ev cellman 24fet controller defect
Replies: 2
Views: 441

em3ev cellman 24fet controller defect

Hello everyone, last year I bought a 24fet 4115 controller from em3ev.com. I received it, installed and then tested. It had so much power that was hard to maintain the front wheel on the ground! The next day I was riding and sudenly it stoped. When I got home I opened and saw that the r115 power res...
by Pedrohlt
Oct 30 2014 8:16am
Forum: Battery Technology
Topic: Headway, buying batteries.
Replies: 1
Views: 431

Re: Headway, buying batteries.

I have bought directly from Headway ( http://portuguese.alibaba.com/supplier_headway-cn_50080629 ) three times. First I bought 24x 38140 cells, a 24S bms and charger. No problem. Then two cells smoked (shorted on the balance cables, my fault), so I bought 3 more cells. The last time I bought 41 cell...
by Pedrohlt
Apr 19 2012 7:03pm
Forum: Battery Technology
Topic: I prefer lipo only because it's cheaper
Replies: 67
Views: 4502

Re: I prefer lipo only because it's cheaper

I think you're all forgetting about headways. you can get them at 1.3usd per Ah from the factory. So for a 12S1P of 38120's you get 39,6 10Ah nominal and able to 10C discharges and 5c charges rates witch is good for most people. Just to compare: 12S1P of 38120's : 39,6v 10Ah - 396Wh - 3.96Kg - 156US...
by Pedrohlt
Dec 19 2010 2:54am
Forum: Battery Technology
Topic: 72V 10Ah LiFePo4 from Biwin ??
Replies: 8
Views: 1253

Re: 72V 10Ah LiFePo4 from Biwin ??

I think Nad is the real name of the guy, not the nick.
by Pedrohlt
Dec 18 2010 8:06pm
Forum: Battery Technology
Topic: 72V 10Ah LiFePo4 from Biwin ??
Replies: 8
Views: 1253

Re: 72V 10Ah LiFePo4 from Biwin ??

anyone?
by Pedrohlt
Dec 16 2010 11:40pm
Forum: Battery Technology
Topic: 72V 10Ah LiFePo4 from Biwin ??
Replies: 8
Views: 1253

Re: 72V 10Ah LiFePo4 from Biwin ??

I'm talking with him now and he said that the shipping is $240 to Brazil by UPS. He said that a guy called Nad of endless-sphere forums is a custumer of them.
by Pedrohlt
Dec 16 2010 10:12pm
Forum: Battery Technology
Topic: 72V 10Ah LiFePo4 from Biwin ??
Replies: 8
Views: 1253

72V 10Ah LiFePo4 from Biwin ??

I'm going to build an ebike with a 9C 9x7 hub and a 72v 10 or 12Ah LiFePO4 battery. I was going to order 24 38120S Headway cells from battery532.com at $14 each and charger and BMS from EV Assemble. But then I asked a guy from Biwin ( http://biwinpower.en.alibaba.com http://www.biwinpower.com/Index....
by Pedrohlt
Jun 27 2010 6:53pm
Forum: E-Bike General Discussion
Topic: vpower is the way to go
Replies: 24
Views: 1861

Re: vpower is the way to go

Does anybody knows the brand of the cells used on Vpower packs ?
by Pedrohlt
Mar 21 2010 3:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Electric Mountainboard Project - 72V 45A controller with 7S
Replies: 12
Views: 2323

Re: Electric Mountainboard Project - 72V 45A controller with

Bad news :cry: . Yesterday something strange happend. I was adjusting the sensors position, the controller was warm and then the motor stops. I thoght the problem was the motor, but when I opened the controller, I saw that one fet exploded :cry: . I was ready to run and have fun, and then it happend...
by Pedrohlt
Mar 13 2010 4:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Electric Mountainboard Project - 72V 45A controller with 7S
Replies: 12
Views: 2323

Re: Electric Mountainboard Project - 72V 45A controller with

Jeremy, On my controller the R01a and the R01b are connected to the Vin of the LM317T and the R01a, R01b and R6 are connected to the Vout. So I have to short the ignition wire to the Vin and let the resistors connected to the Vout, like this ? http://i282.photobucket.com/albums/kk253/Pedrohlt/contro...
by Pedrohlt
Mar 13 2010 3:10pm
Forum: E-Bike Non-hub Motor Drives
Topic: Electric Mountainboard Project - 72V 45A controller with 7S
Replies: 12
Views: 2323

Re: Electric Mountainboard Project - 72V 45A controller with

Jeremy, I tested the setup adding a RC 2S LiPO and it worked ok with 30-32v. So I'll need to change the power resistor to a lower resistance ones, but I don't know the value of the resistors for the controller work with 7S LiFe. I measured the resistors: R1a - 322 ohms (330ohms) R1b - 322 ohms (330o...
by Pedrohlt
Feb 28 2010 5:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: Electric Mountainboard Project - 72V 45A controller with 7S
Replies: 12
Views: 2323

Re: Electric Mountainboard Project - 72V 45A controller with 7S

Jeremy, I was thinking the same thing that you said, to mod a 6 fet controller. Did you mod a 24 or 36v controller? I was thinking to mod an ecrazyman 24v 250W controller ( http://tinyurl.com/yfl5q9x ) with 6 IRFB4110 fets. Do you think it will handle a Turnigy 63-74? When you say to test the hall s...
by Pedrohlt
Feb 27 2010 10:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: Electric Mountainboard Project - 72V 45A controller with 7S
Replies: 12
Views: 2323

Electric Mountainboard Project - 72V 45A controller with 7S

Hi, I'm working on a electric mountainboard. Here is the specifications: Board - MBS Atom 95X Motor - Turnigy 63-74 200kV Outrunner Batteries - 6 or 7 ThunderSky 40Ah LiFePO4 cells Controller - LVC Disabled E-Crazyman 72V 45A 1500W (I blew up my Suppo 100A ESC) Throtle - 10k slide pot Here is some p...