Search found 22 matches

by Raider
Sep 21 2020 2:28pm
Forum: E-Bike Technical
Topic: Can't turn battery power off.
Replies: 4
Views: 96

Re: Can't turn battery power off.

And all this I did with the power in "OFF" position :wink: So no chance I just encounter "residue" power. Do you know for sure that the switch is intended to remove battery power? In some setups it's just a signal to the controller to power down. If you are using a battery intended for another syst...
by Raider
Sep 21 2020 12:58pm
Forum: E-Bike Technical
Topic: Can't turn battery power off.
Replies: 4
Views: 96

Re: Can't turn battery power off.

With my new 52V 20aH battery I stumbled onto a weird problem. No matter what I do, I can't seem to turn the power off. Regardless of what position the switch to the BMS is in, ON or OFF, I still measure full power in the battery cables. Now I have opened the BMS to check to broken or loose cables b...
by Raider
Sep 21 2020 12:04pm
Forum: E-Bike Technical
Topic: Can't turn battery power off.
Replies: 4
Views: 96

Can't turn battery power off.

With my new 52V 20aH battery I stumbled onto a weird problem. No matter what I do, I can't seem to turn the power off. Regardless of what position the switch to the BMS is in, ON or OFF, I still measure full power in the battery cables. Now I have opened the BMS to check to broken or loose cables bu...
by Raider
Sep 14 2020 1:28pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

And as always, ask 15 persons, you'll get at least 16 different answers :)
by Raider
Sep 14 2020 4:45am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Well, build are going forward. Somewhat. But, I noticed that when I put mu ohm meter to the xt 60 connector of the new battery, it reads 2V. Even with the battery swithced off. That's weird. The other one shows 0V. Seems like the battery vendor don't have much of a clue when it comes to store batter...
by Raider
Sep 12 2020 10:47am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Thank you for the tip. I'll contact the vendor. :thumb:
by Raider
Sep 12 2020 5:45am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Just as I thought. BMS drawing a trickle of power constantly. Well, that means I'll have to get someone to maintain the batteries for me while I'm home in Asia. Or do a quick build with an arduino to monitor the voltage and charge it when nessesary. up to 80% or so. Should be easy enough. Oh, well. ...
by Raider
Sep 12 2020 3:49am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Thanks. I'll see what I can find here in Norway. Not that price, that's for sure :roll: Norway is one of the shittiest and most expensive contries in the world. From what I understand, the rpm will also increase a little from 48 to 52V. But there's another little thing too.. I have noticed something...
by Raider
Sep 10 2020 8:13pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Did you actually hold your wheel up in the air and measure it, or just going off a datasheet number? What little data sheet info I have been able to find on this motor, basically only wattage and RPM I'm fully aware that the rpm can be overblown. That's usually the case from any vendor. I have run ...
by Raider
Sep 10 2020 8:03pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Most of those Chinese controllers are built around an Infineon board, that is Japanese. They had produced over the years a very large variety of controller solutions, and their older boards are sold very cheap in mass qty. The software does make the difference between crap and good ones. Neverthele...
by Raider
Sep 10 2020 7:18am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

If that 470 rpm figure is the unloaded speed, then the motor has to slow down below that to make any power at all. Peak power usually occurs at about half of the unloaded speed (and it often overheats your motor if you do it for very long). Increasing the voltage of your battery increases the maxim...
by Raider
Sep 10 2020 5:11am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Hey again. Yeah, chineese mainland fabricated stuff are usually primitive and simple. As a matter of fact, in China, chineese would rather NOT buy stuff made in mainland China. Simply because they know the stuff produced are no good :shock: :D Oh, well. After poking around a bit online, trying to ge...
by Raider
Sep 09 2020 9:40am
Forum: E-Bike Technical
Topic: KT controller 2x Light output
Replies: 8
Views: 186

Re: KT controller 2x Light output

It should. I have seen on the older light pcb's it used to be an old school resistor. Of course, that didn't prevent the familiar smoke, but I have read here in another thread that in stead of replacing that resistor, just solder straight over it. And that was supposed to give about 500mA. Not sure ...
by Raider
Sep 09 2020 6:52am
Forum: E-Bike Technical
Topic: KT controller 2x Light output
Replies: 8
Views: 186

Re: KT controller 2x Light output

My light system is probably a bit different that yours. It's all set up and modified for 5v. But my head light LED's draw 1W each and there is 3 of them. Then I have a few for tail lights and brake lights. The same LED's actually, but with differnt resistors for different brightness of tail light an...
by Raider
Sep 09 2020 6:33am
Forum: E-Bike Technical
Topic: KT controller 2x Light output
Replies: 8
Views: 186

Re: KT controller 2x Light output

Hello. I'm having the exact same problem here. But the whole kid of got me stumped... Why the heck do they even bother with a light output at all when it cant even connect to a relay??? I just tried to have that very same light controller, control a small relay but the only thing that happends are t...
by Raider
Sep 08 2020 4:31am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

This controller can feed much more than its rating, it can be set to limit current, and easy to mod. The controller is not a problem, and the optimisation of the settings for your motor and battery. is mostly a matter of try snd error, even if you knew the exact motor parameters. I see. So basicall...
by Raider
Sep 07 2020 5:09pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Controller parameter settings can give you better acceleration or better efficiency, but very unlikely to give you better top speed. The exception is controllers that are field oriented, for field weakening can be set on those controllers to increase top speed. Cheap controllers can be tricked and ...
by Raider
Sep 07 2020 4:19pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Well, my battery BMS are supposed to give out max 40A. And the display measures the battery voltage correctly, saying a bit above 58v, I think 58.2, when the battery are fully charged. Then, the cut off are set at 42v by the battery BMS. So luckilly, the BMS will protect the battery even if the cont...
by Raider
Sep 07 2020 2:25pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Also, I think that the default controller setup isn't optimal for the motor. So I'm thinking it should be possible to squeeze out a bit more in the top end by optimizing. I guess that's what's bugging me the most, that I can't find out if the system itself are properly tuned. Chasing those few extr...
by Raider
Sep 07 2020 12:42pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Thanks a lot for answering, guys. I see there was one piece of info I left out. My wheels are 26". But I see the same wattage drop on flat ground too. When the speed reaches a bit above 50 km/h, the wattage drop. So there has to be a limiter somewhere. I see when I go uphill, the power can go as hig...
by Raider
Sep 07 2020 12:29pm
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Re: Newbie on a home made ebike. Can't set controller.

Here's my guess you hit the limit of kv and or emf keeps it from taking more watts or it's at its saturation point. You will hit your speed limit and your wattage will go down after you reach the motor speed limit and when it hits its speed limit it is saturated and the amperage and wattage will go...
by Raider
Sep 07 2020 11:30am
Forum: E-Bike General Discussion
Topic: Newbie on a home made ebike. Can't set controller.
Replies: 39
Views: 753

Newbie on a home made ebike. Can't set controller.

Hey people. How are y'all? New guy in here and also new to this home brew e-bike thing. Have made a build but there's a lot I can't make heads or tails of. So... I'm wondering if anyone here could lend a hand. And, yes, I HAVE done my searches :wink: My build is like this: Take one 4 years old, but ...