Search found 2096 matches

by justin_le
Feb 14 2019 5:30am
Forum: Electric Watercraft
Topic: Electric fishing canoe
Replies: 5
Views: 586

Re: Electric fishing canoe

I'll steal a CA off one of my bikes and test it next time I'm on the water. Sweet. Actually if you do that I'll be willing to donate to you a GPS analogger device so that we can log the actual consumption usage along with the GPS speed and position and such. Then so long as you're out in bodies of ...
by justin_le
Feb 14 2019 5:20am
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 88
Views: 13716

Re: Optimal Hub Motor design? Break down of BionX D-Series

It should still be any hot rodder's dream, If only they didn't use a permanent glue to seal the damn things shut! Is it glue, or ultrasonic welding? (probably doesn't matter) Well whatever it is it's a real PITA to separate the two halves apart in a way that it can be neatly put back together again...
by justin_le
Feb 14 2019 1:10am
Forum: Motor Technology
Topic: HyMag tech boosts magnetic flux density of permanent magnets by 10-30%
Replies: 25
Views: 1673

Re: HyMag tech boosts magnetic flux density of permanent magnets by 10-30%

Hey cool and thanks for sharing that. This is a refreshing break from all "new battery" breakthroughs we're used to hearing about. There are several other aspects of the EV drivetrain that are all deserving of improvements and it's good to see permanent magnets getting some R&D love too!
by justin_le
Feb 14 2019 1:01am
Forum: Stand-up E-scooters and E-skateboards
Topic: Grin's weight sensing electric longboards #4 and 5, and kit!
Replies: 24
Views: 5143

Re: Grin's weight sensing electric longboards #4 and 5, and kit!

I love your concept and have been following it's development for many years. My dream board would be the skateboard equivalent of a pedelec - an electric assisted LDP setup. Check out http://pavedwave.org for the theory behind LDP. Mark at http://www.gbomblongboards.com has been hard at work over t...
by justin_le
Feb 14 2019 12:54am
Forum: Electric Watercraft
Topic: Electric fishing canoe
Replies: 5
Views: 586

Re: Electric fishing canoe

I sure like the looks of this! Any mods done on the outboard motor (either with the prop or the motor controller) or is it complete stock? I'm also curious if you have a watt meter or amp-hour meter to get an idea of your consumption in Wh/km at different cruising speeds. We have lots of firsthand i...
by justin_le
Feb 13 2019 1:59pm
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 162
Views: 14776

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

Just like the first iteration torque arm of the Rohloff hub! https://fernandoj.files.wordpress.com/2013/05/rohloffspeedbone.jpg Ha awesome, thanks for sharing that. Nice design convergence and it looks like the Germans take no chances on their torque arms either! I guess that a person standing and ...
by justin_le
Feb 13 2019 1:43pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

It's worth noting that the shunt resistance is explained in some detail in section 6.13 of the user manual https://www.ebikes.ca/documents/CycleAnalyst_V31_Web.pdf CA Shunt Explain.jpg A 300A 50mV (ie 0.1666 mOhm) shunt is really something I would only use in a vehicle that has 500A or so max draw m...
by justin_le
Feb 13 2019 12:47am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 162
Views: 14776

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

I'm going to guess the aluminum rear triangle fatigues at the HAZ next to a weld and grows a crack until it can deform enough to trip the limit switches. Ha, not a bad theory but so far the aluminum frame appears to be holding fine. I will say that if the FRAME fails structurally before the torque ...
by justin_le
Feb 12 2019 6:30pm
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 162
Views: 14776

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

I'll guess it was the P-clamp on the chainstay. Any part that can deflect will be subject to fatigue failure. Yup you guys are pretty spot on there, who needs physical testing when we have the collective wisdom of ES gurus to predict what will happen! We tried two different models of 'P' clamp sinc...
by justin_le
Feb 12 2019 6:31am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

1)...holy cow the power upgrade is immense, really immense, which is saying something as it was no slouch before the bigger shunt. 2) I perhaps wrongly assumed I then needed to alter the CA3 rshunt ohm value to match the new shunt (old grin rhunt value was 1 ohm) so I changed it to show 0.1666 (new...
by justin_le
Feb 12 2019 5:51am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 162
Views: 14776

Splined Torque Arm Cycle Tester

One of the things we posted up on instragram last month was a video showing the testing station that we built for cycle testing the torque arm design. https://www.instagram.com/p/Bsg92CNHCCZ/ Last year on this thread we were doing failure testing where we kept increasing the torque on the axle until...
by justin_le
Feb 12 2019 5:40am
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 88
Views: 13716

Re: Optimal Hub Motor design? Break down of BionX D-Series

It's quite a shame isn't it? MAC has 0.27mm laminations in their motors, whereas other geared motor makers are still using 0.35mm. DD hub makers don't seem to have wised up to using 0.27mm or less yet. True but the benefit of thinner laminations is really only present when you are running the motor...
by justin_le
Feb 12 2019 4:21am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 162
Views: 14776

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

So what was the final outcome of this tread? The outcome is awesomeness about to hit the market! :D In the end we revised the design substantially based on the nature of how the earlier tests has failed. Instead of having something of a 'U" shaped arm we now have a circular piece with a wire slot t...
by justin_le
Feb 12 2019 3:42am
Forum: Stand-up E-scooters and E-skateboards
Topic: Grin's weight sensing electric longboards #4 and 5, and kit!
Replies: 24
Views: 5143

Re: Grin's weight sensing electric longboards #4 and 5, and kit!

Yeah, I suppose if the market has ever ripened and blossomed for this it's definitely now! Neat to see how much electric skateboards have finally taken the fancy of quite a large part of the population. I brought this board to a booth we had at a university career fair this past Friday since I thoug...
by justin_le
Feb 12 2019 3:11am
Forum: E-Bike Reviews & Testing
Topic: Grin Phase Runner / CA3 and BBSHD
Replies: 151
Views: 23801

Re: Grin Phase Runner / CA3 and BBSHD

I want to use phaserunner with BBS02 do anybody know parameters for tune this motor :?: It looks like the motor itself has 8 pole pairs, and a 15:1 total gear reduction to the crank. So if you want to tune it in the parameters of crank RPM, then use 120 (8*15) for the # pole pairs, and a starting g...
by justin_le
Feb 12 2019 3:06am
Forum: E-Bike Reviews & Testing
Topic: Grin Phase Runner / CA3 and BBSHD
Replies: 151
Views: 23801

Re: Grin Phase Runner / CA3 and BBSHD

Excellent! Thanks Justin. That makes sense. So 10V could be supplied by the 6-pin CA-to-Phaserunner plug, and the 5V regulator could actually be housed under the BBSHD cover. That'd be slick. If you guys have a connectorized version of this ready soon I'll probably pick one up from you, but if not ...
by justin_le
Feb 12 2019 1:29am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

Hello ! I have a problem with my CA when I try to use the 5V from Aux for PAS or 3 way switch or anything else, it shuts down : This is what happens when the 5V bus on the CA's aux or throttle plug is shorted to Gnd. The screen will shut off, and then it will turn back on again once the short is re...
by justin_le
Feb 12 2019 1:28am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

Im not getting any throttle response when i twist the throttle. My CA v3 is in Pass thru mode with grin shunt. The throttle icon on the main screen is blinking nonstop and its in the WOT position. I went to the diagnostics screen and seen THR ERR on the top left side, "In" of the screen. This means...
by justin_le
Feb 12 2019 1:22am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

I don't know for sure, but I would think the ground connection wouldn't matter that much. Except to say that if all ground connections are common "before" the shunt (on the controller side of shunt), then the measurement of current will include all sources of power drain? So in other words, even th...
by justin_le
Nov 21 2018 7:12pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

Oh o! I tried to flash 1.13b but something went wrong with my cable mid flash, and now instead of a boot screen i get just blank screen when I turn the CA on. How do I go about recovering it? You can always always always just apply power to the CA after you have clicked the "update firmware" button...
by justin_le
Nov 21 2018 5:36am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

Ok I have updated and things are much better. Couple of bugs to report (this is under high power calibration): 1. If I set 2A in the Fast Ramp Threshold, on the device it looks like its actually sets 20 Amps. This results in a very jumpy DD hub bike in PAS mode, not very safe :) (I fix it by settin...
by justin_le
Nov 21 2018 5:27am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

OK I see, I was under the false impression that if I saw the capital W that means the limit was hit. Well it is, in that the watts limit is the lower of your maximum watt setting, or the watts that is commanded by the PAS control system. The flags are there mostly to give insight into what is contr...
by justin_le
Nov 15 2018 3:34pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 123
Views: 17076

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Adjusting wheel sizes to scale the motors to the same no load speeds Ah no, you can't do that for a fair comparison because you are then comparing the motors at different rpms and torques. The smaller wheel size almost always has the advantage since it needs to produce less torque for the same thru...
by justin_le
Nov 15 2018 1:46am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

I am assuming what happens is that CA notices that power is dropping and because my PAS is set to power mode it ramps up the out throttle to full trying to get more power. When I release the break throttle the CA is outputting fully open throttle 4V so the bike jumps. Exactly. What you need to do i...
by justin_le
Nov 14 2018 7:04am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 680540

Re: Cycle Analyst V3 preview and first beta release

Justin 470 uf across ca input wire fixed it ! Like u said maybe low caps on controller was causing interference??? Glad to hear that was all that was going on. And I would definitely take this opportunity to open up your motor controller and see if the main bus capacitors might need replacement. If...