Search found 233 matches

by district9prawn
Jun 23 2019 7:30am
Forum: Motor Technology
Topic: OpenSource bike "brain"
Replies: 4
Views: 154

Re: OpenSource bike "brain"

Its a good idea and I don't think its pointless at all. People use their light EVs in so many different ways. Check out the "forumscontroller" on the German ebike forum. https://www.pedelecforum.de/wiki/doku.php?id=elektrotechnik:forumscontroller It has pretty similar features to the cycle analyst b...
by district9prawn
Jun 23 2019 7:18am
Forum: Items for Sale - Used
Topic: [AUS] ASI BAC 4000 controller
Replies: 0
Views: 124

[AUS] ASI BAC 4000 controller

Hi all, Around November last year I purchased this controller through ASI directly as part of their evaluation kit. I ended up using VESC controllers on my bike as I like tinkering with the open source firmware. After a couple of months the ASI controller blew and ASI replaced it under warranty. So ...
by district9prawn
Jun 20 2019 6:08am
Forum: E-Bike Non-hub Motor Drives
Topic: cyclone fan MOD 4800 watt motor and Gt it1 frame
Replies: 61
Views: 3538

Re: cyclone fan MOD 4800 watt motor and Gt it1 frame

Too bad about the gears. I half expected they would explode immediately :?

Theres no shame in ebike fails that merely involve slow pedalling home.
by district9prawn
Jun 19 2019 8:29pm
Forum: Motor Technology
Topic: Dumb question about BLDC motor voltage
Replies: 12
Views: 251

Re: Dumb question about BLDC motor voltage

Have you considered the ASI BAC8000 controller? It can provide the power and current you are after. For someone who just dabbled around with MOSFETs, even 104V nominal is "high". As you can see in my previous posts, the currents needed to extract maximum (peak) power from the motor at the rated 55.5...
by district9prawn
Jun 17 2019 6:59am
Forum: E-Bike Technical
Topic: Anyone experienced with VESC FOC sensorless ?
Replies: 5
Views: 192

Re: Anyone experienced with VESC FOC sensorless ?

The motor poles parameter and all of the settings under additional info aren't used for actually spinning the motor. The hall sensor positions should be automatic when you run the sensor detection. Check if the hall sensor table in vesc tool has sensible values (ie not all 255). Also 15 amps should ...
by district9prawn
Jun 17 2019 6:47am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 105
Views: 3744

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Wow 30 cents is really cheap if genuine. Even if you buy thousands from LCSC you are still looking at over $2 USD a piece.
by district9prawn
Jun 14 2019 6:06am
Forum: E-Bike Technical
Topic: Anyone experienced with VESC FOC sensorless ?
Replies: 5
Views: 192

Re: Anyone experienced with VESC FOC sensorless ?

The stutter seems like the controller is trying to run the motor in hall sensor mode, but sensors are not configured or plugged in.
by district9prawn
May 28 2019 3:30am
Forum: E-Bike Non-hub Motor Drives
Topic: Interesting alternative to hobbyking/astro motors - hacker motors..
Replies: 9
Views: 473

Re: Interesting alternative to hobbyking/astro motors - hacker motors..

Are the problems you had with the neu motor pretty typical for the brand, or do you think you got one built on a friday? Neu are pretty well regarded in among the rc crowd. Someone else on this forum had the same balance/vibration problems with an 8057. Neu have not been selling these 8000 motors f...
by district9prawn
May 26 2019 3:45am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 59
Views: 5302

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

flat tire wrote:
May 25 2019 11:56pm
8057
By the way if you need a shaft I can sell you one as I have some spares that I had machined in China. Its basically a CNC version of the one in my first post. Made from 304 stainless and with 12mm at the output for mounting a sprocket.
by district9prawn
May 25 2019 9:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 59
Views: 5302

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

I notice the motor is not completely silent ( i suppose this is to be expected ), yet you're running a VESC variant controller. Is this one of those open cased motors, by chance? Yea the motor has cutouts front and back. Its quite audible even when coasting at speed. In the video you can just make ...
by district9prawn
May 25 2019 2:27am
Forum: E-Bike Non-hub Motor Drives
Topic: Interesting alternative to hobbyking/astro motors - hacker motors..
Replies: 9
Views: 473

Re: Interesting alternative to hobbyking/astro motors - hacker motors..

When you said cheap $100 motors with 0.2mm lams, were you referring to ones like this? https://flipsky.net/collections/e-skateboard/products/flipsky-electric-skateboard-motor-r-6374-190kv-3250w Yep those are the ones. Sensored 80100 and 8085 motors are also available from some of the eskate motor s...
by district9prawn
May 24 2019 9:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: Interesting alternative to hobbyking/astro motors - hacker motors..
Replies: 9
Views: 473

Re: Interesting alternative to hobbyking/astro motors - hacker motors..

It seems like eskate has settled on 10-12s so the sensored outrunners are in the 100-200kv range. I'd agree with flat tire that you may as well go with astro in this price range. And save yourself the hassle of high erpm. Sure faster controllers like the vesc can do 150k erpm but at that point the m...
by district9prawn
May 24 2019 8:47pm
Forum: E-Bike Non-hub Motor Drives
Topic: Interesting alternative to hobbyking/astro motors - hacker motors..
Replies: 9
Views: 473

Re: Interesting alternative to hobbyking/astro motors - hacker motors..

They look like nice motors but yikes the price! I'm a bit confused about whether the pole count is 14 or 28 as the hacker USA site lists 14 and the German site lists 28. With the rise in popularity of eskate, a similar sized motor with 0.2mm laminations and hall sensors can be purchased from HK or o...
by district9prawn
May 23 2019 8:38pm
Forum: Motor Technology
Topic: Can any FOC or sinewave sensorless controller handle an astro 3220?
Replies: 24
Views: 641

Re: Can any FOC or sinewave sensorless controller handle an astro 3220?

I sold one of my 18 fet vescs to a forum member here who is using it to power a delta wound 3220. Not sure if it is up and running but build thread is here https://endless-sphere.com/forums/viewtopic.php?f=28&t=72499 The 60k erpm is a fairly conservative limit from ASI. The cpu doesnt crap out and c...
by district9prawn
May 23 2019 2:12am
Forum: Motor Technology
Topic: Can any FOC or sinewave sensorless controller handle an astro 3220?
Replies: 24
Views: 641

Re: Can any FOC or sinewave sensorless controller handle an astro 3220?

The 3220 has 4 pole pairs so you probably will not get up to 60k erpm?

Low inductance could be a problem though depending on your wind. ASI recommends minimum inductance of 60uh but motors below this seem to work fine.
by district9prawn
May 22 2019 6:48am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 59
Views: 5302

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

Hi, What is this compact vesc ? Where can I buy it ? It is a very intersting model with the two boards sandwich, can you give me its specs pls ? Thx ! Check out team triforce uk. Assembled boards and bare pcb are for sale on the website. I quite like the dual board design for repairability. If mosf...
by district9prawn
May 21 2019 5:51am
Forum: Motor Technology
Topic: Sanity check: outrunner with large no-load current, low inductance
Replies: 13
Views: 454

Re: Sanity check: outrunner with large no-load current, low inductance

I've measured the BEMF and all phases are similarly rough sinusoids. Also, for what it's worth, when running at low speeds (unloaded, around 50 rpm) the current consumption is low, maybe around a total of 10-20W to drive everything. Is it common for eddy losses to be so ridiculously large for outru...
by district9prawn
May 14 2019 8:04am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3176
Views: 336162

Re: new cyclone 3000 w mid-drive kit?

lukashanak wrote:
May 14 2019 6:19am
You can see fuse on left side by the winding on my photo. White thing, 110°C on it.
On your motor was the temp sensor just hanging loose like that originally or did you pull it out to show us? Should really embed it in the windings.
by district9prawn
May 10 2019 6:55am
Forum: E-Bike Non-hub Motor Drives
Topic: cyclone fan MOD 4800 watt motor and Gt it1 frame
Replies: 61
Views: 3538

Re: cyclone fan MOD 4800 watt motor and Gt it1 frame

Grantmac wrote:
May 09 2019 12:00pm
Who makes the VESC?
I assembled Ace's vesc from pcbs I got from team triforce uk. Its 18 fet and 75v max.
by district9prawn
May 04 2019 3:59am
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 355
Views: 49147

Re: VESC-controller: Axiom hardware released!

Awesome can't wait to try this out.

Marcos do you have a compiled vesc tool with field weakening for linux?
by district9prawn
Apr 30 2019 3:46am
Forum: Battery Technology
Topic: Ezee battery fire & recall
Replies: 6
Views: 258

Re: Ezee battery fire & recall

Hillhater wrote:
Apr 28 2019 5:20am
Apparently Ezee are blaming the LG cells for a defect ?
And looks like LG deny everything. I don't recall reading that in article on the day it was published. I only noticed it today?
by district9prawn
Apr 21 2019 3:05am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 105
Views: 3744

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

Would it be possible to have the bluetooth soldered to the pcb? Some IO has been set aside in recent firmware for a permanently attached NRF chip. This would leave RX and TX ports free for other uses such cruise control and profile switching.
by district9prawn
Apr 17 2019 12:39am
Forum: Items for Sale - New
Topic: PV NextGen Controller FOC compact 150v 22kw Max - $499
Replies: 105
Views: 3744

Re: PV NextGen Controller FOC compact 150v 22kw Max - $499

I'm sure the controllers will be great.

Make sure to include the SWD port and the third unused adc pin in the connectors.
by district9prawn
Apr 16 2019 11:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: Small and big block rickshaw motors on Amazon.
Replies: 14
Views: 1004

Re: Small and big block rickshaw motors on Amazon.

Bigger than Cyclone 3kW and 2-4kW, with a lot less torque and a fraction of the power? What am I missing? If they are anything like the ones I bought for a similar price from aliexpress, there is a lot of empty space inside. The stator height is the same as the cyclone 3k at 30mm. Air gap diameter ...
by district9prawn
Apr 14 2019 10:49pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 59
Views: 5302

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

Finally got around to mounting a new encoder board on the bike. https://i.imgur.com/IO8WpYy.jpg I tried using position control to hold the wheel at a stop but wasn't able to get the transition nice and smooth. Instead I configured my regen lever as a reverse throttle and set the reverse erpm limit v...