Search found 10 matches

by jojje123
Sep 19 2017 5:06pm
Forum: Battery Technology
Topic: charge packs in parallell ?
Replies: 10
Views: 637

Re: charge packs in parallell ?

Im asking because I dont know if its the bms or charger that cuts of at 42 volt. I think this cheap BMS only drain each cell for balancing and the charger cuts of at 42v Lets say that the first pack charge faster and reach fylly charged baut the second still need som juice so the charger doesnt shut...
by jojje123
Sep 16 2017 11:00am
Forum: Battery Technology
Topic: charge packs in parallell ?
Replies: 10
Views: 637

charge packs in parallell ?

Is it a bad idea to charge batterypacks with built-in bms in parallell?
I have a lot of hoverboard-battery but only 3 hoverboard-chargers. I want to connect 2-3 packs to each charger.
Is this a good or bad idea ? I know it takes a long time but 9 packs a day is good enough for me.
by jojje123
Mar 14 2017 4:21pm
Forum: Motor Technology
Topic: Problem with varying motorspeed. Please help
Replies: 0
Views: 266

Problem with varying motorspeed. Please help

I need help. What's wrong. Look at this video: https://www.youtube.com/watch?v=FBJI9c4S3U8 I have tried 3 controller with same result. This controller only works in sensored mode. I connected another wheel from an airboard and it works fine. airboard-wheel: https://www.youtube.com/watch?v=6RCKACisyi...
by jojje123
Feb 18 2017 7:40pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electro Ciao (Converted Vespa Ciao Moped)
Replies: 22
Views: 12786

Re: My Electro Ciao (Converted Vespa Ciao Moped)

Thank you for inspiring me. I just got almost everything now for my project. a ciao from early 70's, bosch 100A alternator converted to motor, controller and a lot of 18650 from airboards/hoverboards. (1000 cells) Hopefully I get around 5-6kw @ 72v. Battery is 20s10p samsung icr18650-22p. ca 1.6kWh....
by jojje123
Oct 16 2016 8:53am
Forum: Motor Technology
Topic: Controlling brushless hub throttle via Arduino, not spinning
Replies: 13
Views: 1211

Re: Controlling brushless hub throttle via Arduino, not spin

I mean that if ground to arduino and the controller is not connected together the you send your pwm-output to the space or something. Its like connecting a bulb to the positive side only of a battery. It doesnt work. Always use common ground

Skickat från min E5823 via Tapatalk
by jojje123
Oct 14 2016 12:39pm
Forum: Motor Technology
Topic: ebay controller wattage ? 72v 80A is not 1000W
Replies: 6
Views: 632

Re: ebay controller wattage ? 72v 80A is not 1000W

Great. I Hope to give so much power to the alternator so I can see where the limit is. Aternators are almost for free at the junkyard.

Skickat från min E5823 via Tapatalk
by jojje123
Oct 14 2016 5:05am
Forum: Motor Technology
Topic: ebay controller wattage ? 72v 80A is not 1000W
Replies: 6
Views: 632

Re: ebay controller wattage ? 72v 80A is not 1000W

So with better cooling on mosfets I can peak more continous ?
by jojje123
Oct 13 2016 1:07pm
Forum: Motor Technology
Topic: ebay controller wattage ? 72v 80A is not 1000W
Replies: 6
Views: 632

Re: ebay controller wattage ? 72v 80A is not 1000W

I'm going to use a sensorless controller so I dont need hallsensors. 72v is not a problem for the stator. Its the high amps that is gonna kill the alternator. But I want all that amps at 72v and dont know if the controller can manage that. I cant test it yet. Shipping from china is not fast. 4kw ele...
by jojje123
Oct 13 2016 11:26am
Forum: Motor Technology
Topic: ebay controller wattage ? 72v 80A is not 1000W
Replies: 6
Views: 632

ebay controller wattage ? 72v 80A is not 1000W

I'm looking for a controller for a new project with a car alternator converted to bldc. The problem is ohm's law and the specs of the controller. Max power is 1000w but it can handle 72v 80A. 72x80=5760. Is the controller programmed to output maximum 1000w but it can handle up to 80A at lower volt? ...
by jojje123
Oct 13 2016 11:11am
Forum: Motor Technology
Topic: Controlling brushless hub throttle via Arduino, not spinning
Replies: 13
Views: 1211

Re: Controlling brushless hub throttle via Arduino, not spin

Maybe a stupid answer but do you have common ground for arduino and controller? Otherwise you dont have a closed circuit. And you have to use a voltage divider to your analog output to feed the controller with max 4.1v or 4.5v or use a capacitor and max 82%pwm (analog value 209) This is just my own ...