Search found 258 matches

by pwd
Jul 17 2019 3:37pm
Forum: Battery Technology
Topic: Looking at building a new pack with Samsung 50E
Replies: 25
Views: 797

Re: Looking at building a new pack with Samsung 50E

Great, thanks for the information Pajda!
by pwd
Jul 17 2019 1:28pm
Forum: Battery Technology
Topic: Looking at building a new pack with Samsung 50E
Replies: 25
Views: 797

Re: Looking at building a new pack with Samsung 50E

Pajda wrote:
Jul 10 2019 7:03am
... I am more focused on LG INR21700H40 as a direct (and slightly cheaper) comepetitor to Samsung 40T.
That should be an interesting cell. Have you found any datasheet's or discharge graphs for that cell? What price did you see for the H40?
by pwd
Jul 09 2019 12:55pm
Forum: E-Bike Technical
Topic: Suggestions for adding integrated lights to a BBSHD bike?
Replies: 4
Views: 104

Re: Suggestions for adding integrated lights to a BBSHD bike?

I would just find and light that works in something like the 8V-80V range and run it directly off of the pack voltage (with a fuse if you like). Then there is no external converter needed.
by pwd
Jul 09 2019 9:56am
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 89
Views: 10234

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

I want to move my Hubsink set over to a new motor. Is it necessary to remove the thermal grease from the hubsinks before attaching to the new motor? I have also ordered a few tubes of this to re-apply if necessary.

Thanks!
by pwd
Jul 07 2019 10:53am
Forum: E-Bike Build Threads / Photos & Video
Topic: PWD's Rocky Mountain Element - refresh
Replies: 19
Views: 1443

Re: PWD's Rocky Mountain Element - refresh

The bike has been performing well. I recently got to rip along some short hard packed trails that were an absolute blast around 40-50 km/h. There were many ups and downs and even a bit of air. The clearance between my rear fender and racks is not enough so it kept smashing after hard hits. The bike ...
by pwd
Jul 07 2019 7:25am
Forum: E-Bike Build Threads / Photos & Video
Topic: Another "stelth bomber" build.
Replies: 44
Views: 3121

Re: Another "stelth bomber" build.

Awesome build! Yep, that rim is trashed haha! I was wondering about your experience with Statorade; did you notice a difference while riding after a few runs? ... As i remember from the statoraid thread, I should just add until I get higher amps whith the wheel in the air. And it should take a littl...
by pwd
Jul 05 2019 2:56pm
Forum: Battery Technology
Topic: Duty question: Any Canadians order a battery from em3ev?
Replies: 4
Views: 238

Re: Duty question: Any Canadians order a battery from em3ev?

FYI My em3ev battery order arrived today (July 5) and was in good shape. The order was placed June 5. The battery left their facility on June 11 and the tracking number was given to me on June 17. It arrived in Canada (Richmod, BC) on June 28. I paid $0 import fees/duties delivered to my door. The d...
by pwd
Jul 03 2019 9:48am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1462
Views: 181168

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Looks like a 4T in a 24" wheel would probably be more ideal for you, since you have so much amp output at the ready. Here's a simulator link for you with the kV of the 5T motor adjusted to that of the 4T. https://www.ebikes.ca/tools/simulator.html?motor=Leaf%205T&cont=cust_80_200_0.03_V&wheel=24i&k...
by pwd
Jun 28 2019 12:03pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1462
Views: 181168

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Thanks for the reply neptronix. I am using the 5T winding. The 5T was my choice mainly because I was somewhat limited with my max battery amps I could deliver but I am now running enough for 80A peak discharge.
by pwd
Jun 27 2019 12:50pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1462
Views: 181168

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Hello everyone, I'm looking for some thoughts and opinions. I've been running a leafbike 1500W for over a year now and I'm pretty happy with it but I like the idea of more lbs of thrust and greater efficiency (cooler running motor) of a slightly smaller wheel. I also currently use field/flux weakeni...
by pwd
Jun 24 2019 7:48am
Forum: Battery Technology
Topic: Duty question: Any Canadians order a battery from em3ev?
Replies: 4
Views: 238

Re: Duty question: Any Canadians order a battery from em3ev?

I've ordered a few from them. On the last one, I don't recall paying much or anything at all for duties. Em3ev does a good job of trying to make sure their customer doesn't get hit with import fees/duties. I have another one on the way this week from them so I can let you know after it arrives.
by pwd
Jun 21 2019 2:44pm
Forum: E-Bike General Discussion
Topic: combo platter
Replies: 13
Views: 352

Re: combo platter

Keep reading until you do understand. It sounds like the key thing you are missing is current. Voltage X Current (Amperes) = Power (Watts)

Here is a good article on motor power ratings etc..:
https://www.ebikes.ca/learn/power-ratings.html
by pwd
Jun 21 2019 9:08am
Forum: Battery Technology
Topic: Looking at building a new pack with Samsung 50E
Replies: 25
Views: 797

Re: Looking at building a new pack with Samsung 50E

How many Samsung 50Es in parallel were you considering? Take a look at this site to give you an idea how they would perform vs 30Qs or 40Ts etc...:
https://lygte-info.dk/review/batteries2 ... arator.php
by pwd
Jun 13 2019 8:34am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Monster!
Replies: 6
Views: 484

Re: My Monster!

Awesome looking build. Thanks for posting. What kind of current are you pulling from your 25R battery pack?
by pwd
Jun 10 2019 2:06pm
Forum: Motor Technology
Topic: Can Flux Weakening mess with the hall sensors?
Replies: 7
Views: 298

Re: Can Flux Weakening mess with the hall sensors?

I have a similar quirk when using flux weakening but it was only when I let off the throttle. I had come across this post which seemed to explain it fairly well. Maybe this is what you are experiencing?:
https://endless-sphere.com/forums/viewt ... 4#p1401978
by pwd
Jun 10 2019 1:57pm
Forum: Battery Technology
Topic: Which cell for long lasting battery
Replies: 32
Views: 1113

Re: Which cell for long lasting battery

It is useful to charge to the full amount once a month or so, to ensure that the BMS will balance all of the cells. However, I continue to be shocked that nobody is making a BMS that will balance the cells at 4.1V... Someone correct me if I am wrong but I believe since em3ev has been using a smart ...
by pwd
Jun 07 2019 8:47pm
Forum: E-Bike Build Threads / Photos & Video
Topic: PWD's Rocky Mountain Element - refresh
Replies: 19
Views: 1443

Re: PWD's Rocky Mountain Element - refresh

Do you have another build thread before the refresh? Did you get the brake lights working? I am putting together AWD and was wondering what you think about AWD do you like them? I don't have another thread for this bike but I do have an older picture (before the refresh): Magic Pie 2 on rear Infine...
by pwd
Jun 04 2019 3:08pm
Forum: E-Bike Build Threads / Photos & Video
Topic: PWD's Rocky Mountain Element - refresh
Replies: 19
Views: 1443

Re: PWD's Rocky Mountain Element - refresh

Note to future self:

https://e4bike.ru/page/battery-shape-configurator
cell layout.png
I *might actually* be able to fit 14S7P of 21700 cells in my frame using a "bulged" version of the em3ev 6P pack layout.
by pwd
Jun 03 2019 1:42pm
Forum: E-Bike General Discussion
Topic: EM3ev, setting the record straight on a few things
Replies: 89
Views: 12005

Re: EM3ev, setting the record straight on a few things

We usually see a complaint or two about this right around spring time with em3ev every year when they get overloaded with orders. em3ev is a very good company except for the spring-summer communication wart. I have no doubts you'll get your money back or things will get resolved. For the record, I ...
by pwd
Jun 01 2019 8:18am
Forum: E-Bike Technical
Topic: Upgraded phase wires, but lost torque at low speed?
Replies: 13
Views: 472

Re: Upgraded phase wires, but lost torque at low speed?

It sounds like a poor connection on one of the hall sensor cables. Does it change the behavior if you unplug the motor's hall sensors from the controller?
by pwd
May 31 2019 3:06pm
Forum: E-Bike Build Threads / Photos & Video
Topic: StefEbike for my wonderful disabled wife
Replies: 48
Views: 3687

Re: StefEbike for my wonderful disabled wife

Nice work on the new pack. What cells and what cell holders did you use?
by pwd
May 16 2019 9:37am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2018

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

Personally, I would pick the 5P of Samsung 50E since it would involve less connections and can easily provide the 20 amps discharge current. Other factors you might want to consider would be cost, size, weight and cycle life. If you haven't seen this already, try this site to compare their discharge...
by pwd
May 15 2019 12:08pm
Forum: Items Wanted
Topic: em3ev batterý BMS app
Replies: 6
Views: 425

Re: em3ev batterý BMS app

I've downloaded v3.02 but it doesn't find anything when scanning for bluetooth devices. The original app that em3ev sent me is still working fine. This is on Android 7.1.
by pwd
May 14 2019 9:45am
Forum: E-Bike Technical
Topic: A controller better than Phaserunner?
Replies: 9
Views: 453

Re: A controller better than Phaserunner?

rockstar195 wrote:
May 14 2019 6:54am
9C Clone
Do you know the magnet height on your motor? It is possible you just don't have enough copper to have it perform the way you want.

What kind of battery current are you feeding the Phaserunner?
What kind of cells and how many in parallel are used for your 72V pack?