Search found 35 matches

by bww129
Apr 29 2020 5:23am
Forum: E-Bike General Discussion
Topic: Repairing a shunt on a mainboard
Replies: 44
Views: 1031

Re: Repairing a shunt on a mainboard

Obviously you don't know what value the shunts were, but have you searched to see if someone else has reported their value? What controller is it? Can you post a picture of what they look like? If the controller is trying to read the phase current but you effectively changed the resistance to infini...
by bww129
Apr 28 2020 6:03pm
Forum: E-Bike Technical
Topic: What controller?
Replies: 31
Views: 971

Re: What controller?

The battery wires have these markings on them: CCC A005861 60227 IEC 02(RV) 450/750V. Seems to match what's listed here on Chau's Electrical Co. Ltd. product detail: http://www.chaus.com/product-detail-193.html The battery wire insulation measures about 0.145in (3.68mm) diameter. I didn't keep the l...
by bww129
Apr 27 2020 11:10am
Forum: E-Bike Technical
Topic: What controller?
Replies: 31
Views: 971

Re: What controller?

The Grinfineon C7240 is 72V and 40A for $185. I'm sure you could modify it to produce up to 50A. This controller is very quiet and smooth with a direct drive motor. Do you have experience with this controller? are they programable? If they're not what would the mod look like, a shunt mod? I've been...
by bww129
Apr 25 2020 12:53pm
Forum: E-Bike Technical
Topic: What controller?
Replies: 31
Views: 971

Re: What controller?

s7e wrote:
Apr 20 2020 1:38pm
minimum of 72v... sine wave... minimum of 50a battery current

Kelly 7217S $175
The Grinfineon C7240 is 72V and 40A for $185. I'm sure you could modify it to produce up to 50A. This controller is very quiet and smooth with a direct drive motor.
by bww129
Apr 24 2020 7:45pm
Forum: E-Bike Technical
Topic: Best rear torque arm design/layout?
Replies: 23
Views: 2604

Re: Best rear torque arm design/layout?

And not just one but two Grin V4 torque arms since they fit on both sides. After reading all the doom and gloom about regen working axle nuts loose unless you have a clamped axle setup it seemed worth the extra investment to help prevent issues.

Guess I'll just see how this setup holds up over time.
by bww129
Apr 23 2020 10:38pm
Forum: E-Bike Technical
Topic: Best rear torque arm design/layout?
Replies: 23
Views: 2604

Re: Best rear torque arm design/layout?

I don't want to hijack this thread, but since this is the same subject it makes sense to post here instead of starting a new thread. I've fitted a Crystalyle H3525 to an aluminum frame bike along with two Grin V4 torque arms (two piece) and would like to eventually add regenerative braking capabilit...
by bww129
Apr 22 2020 11:50pm
Forum: E-Bike Build Threads / Photos & Video
Topic: DIY Electric E Bike From Scrap Hoverboard
Replies: 1
Views: 395

Re: DIY Electric E Bike From Scrap Hoverboard

Nice reuse of components! Not sure I believe your "With no engineering or electrical training whatsoever" remark though. You've clearly got some experience :bolt:
by bww129
Apr 22 2020 11:27pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Trek 3700 conversion
Replies: 0
Views: 649

Trek 3700 conversion

There's nothing special about this conversion; just wanted to give this "hobby" a try and see how the old bike would handle it. The Crystalyte H3525 in a 26 inch rim, C7240-GR controller, CA V3, half twist throttle, and V4 torque arms are from Grin Tech. The Wolf V2 pack is obviously from Luna Cycle...
by bww129
Apr 21 2020 10:29pm
Forum: Vendor Relations Corner
Topic: EM3ev vs Luna Batteries and Kits
Replies: 50
Views: 5127

Re: EM3ev vs Luna Batteries and Kits

I was considering getting a pack from EM3ev but decided on the Luna Wolf V2 (30Q cells) for the solid construction and magnetic mounting system that's included. It is being used with a Crystalyte H3525, Grinfineon C7240 controller, and CA V3. The controller limits it to 40A so I can't vouch for the ...
by bww129
Apr 14 2020 7:51am
Forum: E-Bike Technical
Topic: Replacing MOSFETs in a Grinfineon controller.
Replies: 6
Views: 307

Re: Replacing MOSFETs in a Grinfineon controller.

Apparently, one (or more) of the MOSFETs gave up the ghost... None of the MOSFETs looked/smelled burned. No evidence of anything getting hot. First things first - MOSFETs usually fail short circuit (all pins end up having a low resistance between each other) and often fail catastrophically when bei...