Search found 165 matches

by district9prawn
Jan 15 2019 6:53am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

I'm going to start rebuilding the vesc quite soon. Have the pcbs for the new version and am ordering the parts now. https://i.imgur.com/JDg9VGX.jpg I also realised the encoder has ABI incremental outputs. Since they only need to be used for startup the quadrature signals will only be a few khz befor...
by district9prawn
Jan 15 2019 6:41am
Forum: Motor Technology
Topic: Controller options for dual Joby JM1S-2TY
Replies: 2
Views: 94

Re: Controller options for dual Joby JM1S-2TY

I emailed mobipus a couple of months ago asking if it could do 60k erpm in foc. The response was that it was not possible in foc, but possibly in six step commutation. I've never used a mobipus controller personally so don't know if it will work. Would you be using sensored or sensorless? I don't th...
by district9prawn
Jan 11 2019 11:04pm
Forum: E-Bike Technical
Topic: Grin Phaserunner with Cyclone 3000 - hall sensor problem
Replies: 9
Views: 287

Re: Grin Phaserunner with Cyclone 3000 - hall sensor problem

I replaced the genuine honeywell hall that was giving the false triggers with the original. It sounds a bit better but still a bit rough. Not sure why selecting "hall start sensorless run" in the asi software makes no difference. I tried on a vesc and it seemed to be fine. Still rough on halls at hi...
by district9prawn
Jan 11 2019 6:54am
Forum: E-Bike Technical
Topic: Grin Phaserunner with Cyclone 3000 - hall sensor problem
Replies: 9
Views: 287

Re: Grin Phaserunner with Cyclone 3000 - hall sensor problem

After replacing a hall I was having similar problems to the OP with the phase runner. https://i.imgur.com/wwm9bXz.png The left half of the screen is when the motor is being driven and the pwm waveform is being picked up by the hall wires and superimposed while the halls are pulled high. The right si...
by district9prawn
Jan 09 2019 11:38pm
Forum: E-Bike General Discussion
Topic: Running 2 controllers on one bike alternately - EE question..
Replies: 13
Views: 293

Re: Running 2 controllers on one bike alternately - EE question..

I'm a bit confused. What is the problem with the infineon 18 fet with the 3 speed switch?
by district9prawn
Jan 06 2019 11:10pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Sensorless parameters are: Starting current: 180A (I'm sure the full current is not used) Open loop injection current ramp time: 60ms Closed loop enable frequency: 16hz Open loop frequency ramp time: 250ms Open loop dc current hold time: 15ms Current is quite high to make sure it starts reliably eve...
by district9prawn
Jan 05 2019 7:12pm
Forum: Motor Technology
Topic: Sensorless at standstill, development updates and status
Replies: 78
Views: 4337

Re: Sensorless at standstill, development updates and status

spinningmagnets wrote:
Jan 05 2019 4:06pm
Lebowski, open a Patreon account, and I will donate today.
Yes Patreon is a good idea. It seems like everyone and their dog has a patreon account these days :P
by district9prawn
Jan 04 2019 9:49am
Forum: Battery Technology
Topic: Ugh overcharged lipo to 4.55v!
Replies: 1
Views: 149

Ugh overcharged lipo to 4.55v!

I got myself 3x 6s 6000mAh HK packs for Christmas. I set up a satiator profile for 18s. Buuuut the default profile was 20s and being a dumbass I charged the combined 18s to 82v :oops: . I'm not quite dumb enough to charge while I'm away from the house so I estimate they were sitting at 82v for about...
by district9prawn
Jan 04 2019 9:35am
Forum: Battery Technology
Topic: Paralell 13s5p 18650s with rc lipos?
Replies: 11
Views: 259

Re: Paralell 13s5p 18650s with rc lipos?

With rc lipo the voltage drops off sharply below 3.6v. The Sanyo GA cells will still have a decent amount of energy left when they are at 3.6v. You won't really make good use of your main 18650 pack this way. Not to say it can't be done. If you do decide to go this route I'd strongly recommend a bms...
by district9prawn
Jan 01 2019 6:52pm
Forum: Motor Technology
Topic: SPM VS IPM Motor - And Field weaken, is it worth it
Replies: 82
Views: 1911

Re: SPM VS IPM Motor - And Field weaken, is it worth it

Can we say that if the flux path between the magnets is poor, the potential for relutance torque is also poor? And lets assume we have a given motor and an induction meter, can we "measure" it's potential for reluctance torque, or the general potential for field weakening? Is it just always the dif...
by district9prawn
Dec 29 2018 4:42pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

evolutiongts wrote:
Dec 29 2018 12:13pm
Are you able to get smooth startup from a stop while running sensorless?
It starts smooth enough and reliably. Main downside is that the startup routine takes up around a third of a second during which the motor is unresponsive to brake or throttle input.
by district9prawn
Dec 29 2018 5:24am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

evolutiongts wrote:
Dec 28 2018 9:00pm
Are you running sensors or purely just sensorless?
No sensors. I've been considering emulating the halls with the encoder but I need to make it a bit more rugged and sealed against crap from the chain.
by district9prawn
Dec 28 2018 5:58pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Impressive, how is the throttle modulation and control? Top speed? What are you thoughts so far? Are you freewheeling or direct drive? What are you running for a display? It is direct to rear wheel with no freewheel. I'm using regen. Display is CA. At the moment it is geared really high. Top speed ...
by district9prawn
Dec 28 2018 4:49am
Forum: E-Bike Technical
Topic: Grin Phaserunner with Cyclone 3000 - hall sensor problem
Replies: 9
Views: 287

Re: Grin Phaserunner with Cyclone 3000 - hall sensor problem

The hall combinations should not matter. The controller will figure it out when it spins the motor in sensorless during autotune. But if something prevents a repeatable hall sequence then autotune won't work. Since your sensors seem to toggle ok when turning by hand it should be possible to manually...
by district9prawn
Dec 28 2018 1:43am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder



First proper video from the gopro I bought on boxing day. The ride itself isn't that interesting. Towards the end I climb a hill at 65kph which was fun.
by district9prawn
Dec 27 2018 6:03pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Controller finally arrived from ERT after being probed by US customs for two bloody weeks. :evil: https://i.imgur.com/73FEWjH.jpg I've been busy in the mean time. Moved all the parts over to a 27.5 plus hard tail. A bit better off road, a sturdier frame and most importantly, better high speed stabil...
by district9prawn
Dec 23 2018 5:26am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 363
Views: 26982

Re: Nucular electronics - complete kit for ev! [beta]

This talk of fw performance of spm motors reminds me of a phd thesis I read.

Image

Search for "Design of permanent magnet motors for field weakening operation" by Chun Tang
by district9prawn
Dec 14 2018 4:11pm
Forum: E-Bike Reviews & Testing
Topic: Epic 7kw+ 12 fet controller...or there abouts :)
Replies: 92
Views: 3337

Re: Epic 7kw+ 12 fet controller...or there abouts :)

Surely the one big heatsink or one cpu cooler should be plenty. :shock:
by district9prawn
Dec 03 2018 1:09am
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1354
Views: 153190

Re: Dave's 80:1 RC mid drive kit build log

Ahah oh crap Bruno's YT video of my bike is still out there. However I can't put ANY sort of real load on it or it will cut out with phase over current error. I can sort of get it to stop doing that by raising the "current regulator bandwidth" setting but the best I've reached was not cutting out wi...
by district9prawn
Dec 02 2018 4:48am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3026
Views: 179068

Re: Sur-Ron - New Mid drive Bike

madin88 wrote:
Dec 01 2018 1:17pm
I got a few photos of the motor and controller internals (the motor pic is from the russian member VasiliSK):

The size of the rotor is approx 100 x 32mm
12N10P design
The stator and rotor look like a larger version of the chinese trike motors.
by district9prawn
Nov 26 2018 12:29am
Forum: Items for Sale - New
Topic: Professional ESC base on VESC introduction
Replies: 61
Views: 3069

Re: Professional ESC base on VESC introduction

A fellow is building a 150v vesc over on the vesc-project forum. https://vesc-project.com/node/655 Their project uses 200A allegro hall current sensors. From recent posts it looks like the board is up and running. I'm currently laying out a similar board for 18 fets and using 150A nominal/450A peak ...
by district9prawn
Nov 22 2018 12:38am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Would you mind to let us know the supplier? Got it from cometkarts in the US. What is the reason for switching to a ASI 4000 Controller over a custom 18fet VESC ? Main reason is that the vesc died. Also when I installed the phase runner afterwards I found the braking and low speed performance was a...
by district9prawn
Nov 17 2018 8:45am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Can you go into more detail or show some more pictures of your bottom bracket and mounting plate setup? I had the same idea of mounting a motor in front of the bottom bracket and driving the rear wheel directly on the left side. Specifically, it looks like you are running an ISIS bottom bracket? Is...
by district9prawn
Nov 15 2018 7:19am
Forum: Items for Sale - New
Topic: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers
Replies: 62
Views: 4337

Re: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers

I needed more controllers (4000 and 8000) but after waiting over a month after ERT said my order would ship before I received it (experience detailed above) there was no way I could make another order from them. I bought instead from ASI and not only did my order ship ONE day after purchase, I get ...
by district9prawn
Nov 09 2018 1:13am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 35
Views: 2502

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Trying a 105t sprocket which is the largest 219 off the shelf tooth size I can find. It seems a lot quieter than my laser cut sprocket. Also less runout than the laser sprocket. Not sure why the laser cut sprocket has so much runout but it is a bit annoying to tension. https://i.imgur.com/MevDYcc.jp...