Search found 26 matches

by jordanjozsef
Aug 28 2019 3:32pm
Forum: E-Bike General Discussion
Topic: Hacking Controller LVC
Replies: 5
Views: 787

Re: Hacking Controller LVC

What about the EBS 7.5 k Ohm resistor? I found mine, but I don't know what happens if I change the value of it. My regen's highest voltage is 90V and I want to change it to 120V, because it does nothing when I connect my high voltage battery, but it works well with 72V, when no battery connected, an...
by jordanjozsef
Aug 06 2019 9:38am
Forum: E-Bike Technical
Topic: Motor Controller, why not bigger? 12 Fet vs 18 Fet
Replies: 25
Views: 5590

Re: Motor Controller, why not bigger? 12 Fet vs 18 Fet

Well, I put a third shunt meanwhile and I'm using it like that for a few months with an extra heat sink and fan, because it can get hot during a full throttle acceleration. It draws 54A, and it works well, I just need to improve the cooling system. I want to remove the ribs on the controller's box, ...
by jordanjozsef
Jul 19 2019 12:12am
Forum: E-Bike Technical
Topic: Higher regen voltage than battery voltage
Replies: 7
Views: 1022

Re: Higher regen voltage than battery voltage

My controller has regen, however the seller said it doesn't have, but I enabled it, the controller's low voltage cutoff is at 58V, it's marked as a 108V controller anyway and my fully charged battery is around 115V. The problem is that the regen doesn't work at that voltage. It works well with a 72V...
by jordanjozsef
May 23 2019 2:35am
Forum: E-Bike Technical
Topic: Motor Controller, why not bigger? 12 Fet vs 18 Fet
Replies: 25
Views: 5590

Re: Motor Controller, why not bigger? 12 Fet vs 18 Fet

Then you have about 4300w of power out from the controller already. You know, people always want more, and since I'm in between the safe limits, why not? I guess my 3000W hub motor could handle 6000W bursts without problem, because my 300W hub motor handled the 4300W too. Me with the bike weights a...
by jordanjozsef
May 23 2019 2:03am
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

I guess mine just simply decrease the RPM to the given throttle position. I see that it couldn't work for anyone and I'm lucky it works this way on my controller, so I don't have to do more complicated things. Now the other things I'm interested about is when I do the shunt mod, if it affects the ac...
by jordanjozsef
May 23 2019 1:19am
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

I don't have Cycle Analyst, but I had to mention that I was working on how to limit the speed with a potentiometer connected between the throttle and the controller and it worked well, but looks like there's a limit that the controller can't see, so I wasn't able to get lower RPM, it just decreased ...
by jordanjozsef
May 22 2019 2:21pm
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

Don't think that works, because if I gently pull the throttle, nothing - nothing - nothing, then bam it pushes like crazy. I also noticed when I pull the throttle, the wheel doesn't want to spin, I have to twist more to make it spin, then while it's spinning, if I slowly release the throttle the RPM...
by jordanjozsef
May 22 2019 6:56am
Forum: E-Bike Technical
Topic: Motor Controller, why not bigger? 12 Fet vs 18 Fet
Replies: 25
Views: 5590

Re: Motor Controller, why not bigger? 12 Fet vs 18 Fet

I have a 18 FET controller with IRFB4110 FETs and the current limit is 42A, which is not much. I have a 3000W rated hub motor, and 108V nominal voltage. The power output is easy on the motor, and the controller has only 2 shunts but there's a place for a third, so I guess it could easily handle the ...
by jordanjozsef
May 19 2019 1:03pm
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

I want to have torque while I'm accelerating, but not from standstill. I had a 72V controller which had a "soft start" function, it did exactly what I want now. It was annoying with lower voltage, because it took so much time to speed up, but now it could work well. And I want to switch it, because ...
by jordanjozsef
May 11 2019 12:06am
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

It's not programmable, but it has a three speed switch. Well it's a "limited" controller, the voltage range varies from 58v to 120v. The seller said it has no regen, but I enabled it on the pcb, but it's max regen voltage is 90v, so I can't use it, I also was able to limit the max rpm, but the my ha...
by jordanjozsef
May 10 2019 4:11pm
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18584

Re: Modifying a shunt with controlled results

I just tried out my 3 kW high speed hub motor in a 20" rim, and it's ridiculously powerful from dead stop. I can't accelerate lightly, it immideately lifts the front wheel if I don't lean on, and it's impossible to twist the throttle when turning and going slow, because it's just way too powerful. I...
by jordanjozsef
Apr 26 2019 3:29am
Forum: Motor Technology
Topic: High Voltage versus High Current
Replies: 13
Views: 2652

Re: High Voltage versus High Current

When I build my first Ebike, I chose 28" wheel and 48V. It was good for the first time, and fast too, but then I tried a 18" wheel Ebike with the same voltage and the amps were actually less and it was more powerful, but slower of course. And that's why I chose a high voltage and low amp setup. I'm ...
by jordanjozsef
Feb 12 2019 2:09am
Forum: E-Bike Technical
Topic: High voltage low amp controller + battery... thoughts?
Replies: 6
Views: 1043

Re: High voltage low amp controller + battery... thoughts?

Mine is a brushless hub motor, but I want to go on high voltage, just like you, because my current setup (18" wheels, 52V 33Ah Li-ion battery pack) gives me 38-43km/h, depends on the battery's voltage and around 80 km range (on full throttle). But I hate that the top speed really depends on the volt...
by jordanjozsef
Feb 03 2019 2:20pm
Forum: General Discussion
Topic: What is the best wheel size for ebike via your experience ?
Replies: 9
Views: 1727

Re: What is the best wheel size for ebike via your experience ?

My experience is that the smaller wheel is better. Here's why: My first E-bike had 28" wheels, because this is the size that I use for a normal bike too. And I though it will be faster than a small wheel. And yes it was fast, at 48V, the max. speed was around 50km/h with a 500W controller. Then I tr...
by jordanjozsef
Jan 02 2019 2:02pm
Forum: E-Bike Technical
Topic: Hub motor RPM limits? ( bearings? )
Replies: 10
Views: 1175

Re: Hub motor RPM limits? ( bearings? )

I'm interested about the limits, because I found out that larger wheels aren't always the best option. I recently purchased a 108V 1500W controller (42A peak) for only $81, so I can test around at higher voltages. I have 2 E-bikes, a stock one with 18" wheels, it looks like a scooter, but it's consi...
by jordanjozsef
Dec 31 2018 1:41pm
Forum: E-Bike Technical
Topic: Enabling regenerative braking on eBay hub kit
Replies: 38
Views: 4198

Re: Enabling regenerative braking on eBay hub kit

I soldered the EBS pads together, and then I used the low level brake, the regen works, I measured it, but the brake power is so weak and not constant, I tried at higher speed too, how about your braking power? I also have a soldering point next the the two EBS ones, it's called EBS1, I guess it's s...
by jordanjozsef
Dec 26 2018 2:25pm
Forum: E-Bike General Discussion
Topic: Throttle response/lag problems
Replies: 7
Views: 1419

Re: Throttle response/lag problems

Yes, it has to do with the RPM, from standstill, you get instant response, and when you are going faster, the lag increases. The best you could do is not to fully release the throttle when slowing down, because the throttle response will be better. The best way to describe this is when you release t...
by jordanjozsef
Oct 30 2018 5:50pm
Forum: E-Bike Technical
Topic: Enabling regenerative braking on eBay hub kit
Replies: 38
Views: 4198

Re: Enabling regenerative braking on eBay hub kit

Could you please summarize what did you do to enable regenerative braking? I have only a 48V 7Ah battery pack, I really need to increase the range without spending lots of money on the battery yet.
by jordanjozsef
Oct 28 2018 8:34pm
Forum: E-Bike Technical
Topic: Battery upgrade (voltage or amp hours) for longer distance and speed
Replies: 7
Views: 639

Re: Battery upgrade (voltage or amp hours) for longer distance and speed

My 48V System currently maxes out at 50km/h, which is nice, because it's a 350W controller with 14A max. output. I did the shunt mod, the torque was better the max. amp was 24A, but I still stuck at 50km/h, no matter how hard I leaned on the handlebars, because above 40km/h, the amp started to go ba...
by jordanjozsef
Oct 28 2018 8:17pm
Forum: E-Bike Technical
Topic: Enabling regenerative braking on eBay hub kit
Replies: 38
Views: 4198

Re: Enabling regenerative braking on eBay hub kit

I have a different controller, which has an EBS label on the board, but it's a really cheap one, so I'd be wondered if it could work. Do I just need to hook the EBS to the ground or hook it through the brake lever? The brake lever has yellow and black cable, so I guess black goes to ground and yello...
by jordanjozsef
Oct 19 2018 2:49am
Forum: E-Bike Technical
Topic: Battery upgrade (voltage or amp hours) for longer distance and speed
Replies: 7
Views: 639

Battery upgrade (voltage or amp hours) for longer distance and speed

I was thinking on, in theory the higher the voltage the less amps are needed to produce the same power. Let's say I want to upgrade from 48V to 96V, while everything is the same (controller, motor, battery capacity). With 96V the motor can spin faster, and if the controller can give me enough amps, ...
by jordanjozsef
Oct 11 2018 12:51am
Forum: E-Bike Technical
Topic: Ebike lack of top speed
Replies: 6
Views: 616

Re: Ebike lack of top speed

It's actually a large motor, the wheel weights 7 kg. I took it from an Ebike used by old people and it was limited to 25 km/h (that's the law), and it was laced in a 22" rim. So it goes faster in a larger wheel for sure and me with the bike weights around 85 kg, so that's why can I go that fast. I t...
by jordanjozsef
Oct 10 2018 4:05pm
Forum: E-Bike Technical
Topic: Ebike lack of top speed
Replies: 6
Views: 616

Ebike lack of top speed

I just finished my diy ebike, with a 36V 300W hub motor and a 48V controller / battery pack. The controller's max. amp is 18A, but I found out it was only 14A, no matter what I did, it topped out at 14. My max. speed is 47-48 km/h which is pretty nice from 14A. I did the shunt mod, because why not, ...
by jordanjozsef
Oct 03 2018 4:55pm
Forum: E-Bike General Discussion
Topic: Can I add a single speed freewheel on my gearless hub motor?
Replies: 11
Views: 557

Re: Can I add a single speed freewheel on my gearless hub motor?

I saw 12T freewheel on Ebay and I saw a 14T freewheel live. I'm using a 16T one, but I found out there are some incompatibility between the threads, the freewheel just stuck at the halfway on the hub, I had to make a thread die from an old freewheel to fix the thread on the hub motor, however it was...
by jordanjozsef
Oct 03 2018 1:43pm
Forum: E-Bike General Discussion
Topic: MXUS 250w how to increase the speed
Replies: 21
Views: 1344

Re: MXUS 250w how to increase the speed

You could stick with your battery pack, you can check the top speed of your motor can do when you lift up the Wheel on full throttle. That's the maximum speed your motor can give at a certain voltage. Of course when it's spinning 50 km/h, you won't go 50km/h, unless you give more amp to your motor (...