Search found 506 matches

by pwd
Nov 28 2020 12:55pm
Forum: EScooters/EMotorcycles
Topic: EMMO Proton Shunt Mod?
Replies: 20
Views: 758

Re: EMMO Proton Shunt Mod?

I have, I tried adding solder with no wire but didn't get any results. Exact same top speed. I'm having trouble getting the solder to bond to the circuit board though, I think my iron just isn't hot enough. I'm guessing this is likely my issue. The shunt mod affects the max current values of a cont...
by pwd
Nov 27 2020 6:10pm
Forum: General Discussion
Topic: 2020 eBike black friday / cyber monday sale thread
Replies: 3
Views: 426

Re: 2020 eBike black friday / cyber monday sale thread

https://em3ev.com/

From their Facebook

"Our Black Friday Sales start early this year and will be running until the 1st of December.

Get 10% off all EM3ev batteries if payment is made via PayPal and 15% off if paid through bank transfer.

Sales are now live!"
by pwd
Nov 25 2020 11:24am
Forum: E-Vehicles General Discussion
Topic: Electric snowblower conversion: Gas powered Yamaha to 5kW electric
Replies: 7
Views: 3413

Re: Electric snowblower conversion: Gas powered Yamaha to 5kW electric

Just wanted to say nice conversion. I'd love to convert a snowblower to electric someday.
by pwd
Nov 24 2020 2:50pm
Forum: Forum Rules and Features
Topic: Forum going down in ~1 hr
Replies: 6
Views: 603

Re: Forum going down in ~1 hr

Thank you neptronix for the update and your work.
by pwd
Nov 23 2020 10:40am
Forum: Motor Technology
Topic: Again...3T, 4T, 5T, 6T difference
Replies: 57
Views: 2359

Re: Again...3T, 4T, 5T, 6T difference

j bjork wrote:
Nov 23 2020 10:18am
...if you dont go to extremes...
Can you explain what you mean by "go to extremes"?
by pwd
Nov 23 2020 9:56am
Forum: Motor Technology
Topic: Again...3T, 4T, 5T, 6T difference
Replies: 57
Views: 2359

Re: Again...3T, 4T, 5T, 6T difference

... If you will get fast winding your will have less dynamic ride than you would have with 5T or 6T. If you get slow motor 5t or 6t you will get better dynamic with you weak battery. ... As far as I understand and having read though the "myth" crushing threads; a faster wind or low turn c...
by pwd
Nov 23 2020 8:47am
Forum: Motor Technology
Topic: Again...3T, 4T, 5T, 6T difference
Replies: 57
Views: 2359

Re: Again...3T, 4T, 5T, 6T difference

... If you will get fast winding your will have less dynamic ride than you would have with 5T or 6T. If you get slow motor 5t or 6t you will get better dynamic with you weak battery. ... As far as I understand and having read though the "myth" crushing threads; a faster wind or low turn c...
by pwd
Nov 20 2020 3:19pm
Forum: EBike Technical
Topic: Reading a 100k thermistor with incompatible controller
Replies: 3
Views: 155

Re: Reading a 100k thermistor with incompatible controller

On mine, I replaced the temp probe (was a KYT-183) with a 10K NTC so that I could use one of these inexpensive meters: https://www.aliexpress.com/item/1005001566767783.html I wonder if such a thing exists for a 100k NTC? You may also benefit from something like Statorade if you aren't sing it alread...
by pwd
Nov 19 2020 8:57am
Forum: EBike General Discussion
Topic: Heavy fat ebike with hub motor, safe to do jumps?
Replies: 16
Views: 669

Re: Heavy fat ebike with hub motor, safe to do jumps?

Just playing the devil's advocate here but fat tires (4.0 + inches wide) would soften the landing somewhat depending on the tire, air pressure etc...
by pwd
Nov 08 2020 12:00pm
Forum: Battery Technology
Topic: Is this useless due to bottle necking the power?
Replies: 11
Views: 389

Re: Is this useless due to bottle necking the power?

How much max current are you pulling? It doesn't really matter how many volts you are running; it is the current and length that matters when determining optimal cable diameter.
by pwd
Nov 05 2020 9:38am
Forum: E-Vehicles General Discussion
Topic: BMW E "i5" conversion by Matija
Replies: 54
Views: 8062

Re: BMW E "i5" conversion by Matija

Fantastic conversion. Everything looks clean and well done. I love that you kept the car looking original. I hope you get many happy kilometers of your your build, enjoy!
by pwd
Oct 25 2020 8:29am
Forum: Battery Technology
Topic: Adding Current and Voltage Controls.
Replies: 4
Views: 259

Re: Adding Current and Voltage Controls.

You may want to take a look at this. Most generic chargers do have some voltage and current adjustability via some trim potentiometers inside:
https://www.youtube.com/watch?v=ViORzKrOfHU

I suppose you could add an external trim pot that matches the range of the on inside (if it has one).
by pwd
Oct 19 2020 9:58am
Forum: EBike Build Threads
Topic: Hawk Classic - “stealth-ish” build
Replies: 11
Views: 1204

Re: Hawk Classic - “stealth-ish” build

Cool looking build. I'm digging the retro look. I need to come up with a better solution than the wire strips - any sugestions? What did you mean by this ^^? Sorry, bad wording :) cable ties i meant. Ah I see. It's hard to get away from cable ties since they work so well. You've color matched them ...
by pwd
Oct 17 2020 5:38pm
Forum: EBike Build Threads
Topic: Hawk Classic - “stealth-ish” build
Replies: 11
Views: 1204

Re: Hawk Classic - “stealth-ish” build

Cool looking build. I'm digging the retro look.
PeterpDahl wrote:
Oct 14 2020 1:58pm
I need to come up with a better solution than the wire strips - any sugestions?
What did you mean by this ^^?
by pwd
Oct 16 2020 2:36pm
Forum: EBike General Discussion
Topic: Usable Watt-hours?
Replies: 6
Views: 264

Re: Usable Watt-hours?

Your 650 watt hour figure seems about right compared to the pack's 884 wh rating. You have to also consider that most battery packs will have a low voltage cutoff that is triggered somewhere around 2.7-3.1V per cell which may be around 10% to 20% stage of charge. Another factor is that the capacity ...
by pwd
Oct 16 2020 8:58am
Forum: EBike Non-hub Motor Drives
Topic: How do you size the right Mid Drive?
Replies: 36
Views: 1054

Re: How do you size the right Mid Drive?

The beauty of a mid drive is that you can utilize the bike's rear cassette/freewheel which allows you to tackle those steep; rooty, low speed climbs with minimal power. Here is a quick example in the simulator using a BBS02 Motor set to 20A max battery current @52V. I only picked this motor because ...
by pwd
Oct 16 2020 7:56am
Forum: EBike General Discussion
Topic: Off Road Throttle which one do you prefer?
Replies: 32
Views: 1169

Re: Off Road Throttle which one do you prefer?

I like a half twist throttle only. It takes a while to get used to the throttle curve etc... but it gives me great modulation. I have been running at full power on the mtb trails lately but I'm able to still contribute some leg power when necessary just by being in the right gear etc... Can you rec...
by pwd
Oct 15 2020 4:00pm
Forum: EBike General Discussion
Topic: Off Road Throttle which one do you prefer?
Replies: 32
Views: 1169

Re: Off Road Throttle which one do you prefer?

I like a half twist throttle only. It takes a while to get used to the throttle curve etc... but it gives me great modulation. I have been running at full power on the mtb trails lately but I'm able to still contribute some leg power when necessary just by being in the right gear etc...
by pwd
Oct 06 2020 8:29am
Forum: EBike Technical
Topic: Opto relay issues
Replies: 25
Views: 891

Re: Opto relay issues

It is usually the job of the motor controller to cut the throttle signal when the e-brake is triggered. If you can provide a schematic of how you have your relay wired; that may help pinpoint the issue.
by pwd
Sep 27 2020 2:25pm
Forum: EBike Build Threads
Topic: PWD's Rocky Mountain Element - 2WD
Replies: 64
Views: 9582

Re: PWD's Rocky Mountain Element - 2WD

The bike has been working well and is more enjoyable without the kinks of the old front controller. Shorty after I installed the front controller; I trimmed out all the un-used cables for a cleaner look. IMG_20200904_151514.jpg I've sealed up the top where the cables exist with black liquid tape for...
by pwd
Sep 24 2020 8:32am
Forum: EBike Technical
Topic: Hot Rodding the Anza Motorbike
Replies: 2
Views: 219

Re: Hot Rodding the Anza Motorbike

I would probably try to locate a similar frame and build it up from there instead of buying a pre-built bike that you would be stripping the components off of anyway. According to their site is says they are sold out of the current batch and aren't available till December. You mentioned full suspens...
by pwd
Sep 23 2020 10:03am
Forum: EBike Build Threads
Topic: Framed Alaskan Fat BBSHD Build Thread
Replies: 29
Views: 2979

Re: Framed Alaskan Fat BBSHD Build Thread

How does the bike ride? Did you have to tweak things to improve the chainline?
by pwd
Sep 22 2020 12:24pm
Forum: EBike Technical
Topic: Do cooler motors run quicker?
Replies: 16
Views: 789

Re: Do cooler motors run quicker?

A cooler motor will run "better" but depends on the temperature differences and motor setup etc... here is a basic example: https://www.ebikes.ca/tools/simulator.html?bopen=true&temp=10&temp_b=90 10 C vs 90 C initial motor temperature - click on the "Show Advanced" to adj...
by pwd
Sep 20 2020 2:25pm
Forum: EBike General Discussion
Topic: road rage :( (lets hear your stories)
Replies: 25
Views: 2256

Re: road rage :( (lets hear your stories)

It has been a while since I had someone go crazy on me while riding my e-bike but it happened again. I was out for a ride doing approximately 56-57 kmph in a single lane 50 zone; they same speed I would drive my car at. I ghost pedal anytime I'm on public roads an. I'm in the left tire track. A driv...
by pwd
Sep 14 2020 8:20am
Forum: EBike Technical
Topic: Is regenerative braking really worth anything?
Replies: 104
Views: 3564

Re: Is regenerative braking really worth anything?

Regen braking is very valuable to me. I am using two dd hub motors and frequently ride around with traffic at approximately 55-60 kmph. Regen drastically improves my stopping distance and I'm sure I save a lot of wear on the pads. I treat it like engine braking. I don't really use it for the energy ...