Search found 279 matches

by district9prawn
May 24 2020 11:28pm
Forum: Vendor Relations Corner
Topic: E.R.T \ Alan Hu nightmare.
Replies: 23
Views: 796

Re: E.R.T \ Alan Hu nightmare.

thender wrote:
May 21 2020 10:46pm
He said ASI doesn't allow end consumers of resellers credentials to log into their controllers. Ok, fine, but why are you programming controllers to do this?
Have you got a copy of the ASI pc software? A login is not required to program the controller over the serial interface.
by district9prawn
May 03 2020 4:19am
Forum: E-Bike Non-hub Motor Drives
Topic: Freehub pawls failure? Is this common 3kw+
Replies: 20
Views: 756

Re: Freehub pawls failure? Is this common 3kw+

3. I installed an aftermarket steel freehub body. No bite-in problems anymore! By far the best hub for ebikes. Not the lightest but really durable and maintenance and upgrade friendly. Yes don't forget to buy the steel freehub body with the DT star ratchet hubs. The splines on my steel freehub stil...
by district9prawn
Mar 17 2020 4:58pm
Forum: Motor Technology
Topic: True FOC: definition and examples
Replies: 53
Views: 2667

Re: True FOC: definition and examples

Note that if you have three wires going to motor windings, due to Kirchoff's Current Law, once you know the current in two of the phases, you automatically know the current in the third. My first hybrid (Honda Civic Hybrid) had only two current sensors for the three phase traction motor for that re...
by district9prawn
Feb 28 2020 8:14am
Forum: Motor Technology
Topic: What's so bad about low impedence?
Replies: 30
Views: 1538

Re: What's so bad about low impedence?

ASI are pretty conservative with their ratings. I ran their bac4000 controller with the 100kv wind of the 8057. Did the auto tune and set up as per the manual and everything worked.
by district9prawn
Feb 27 2020 6:07am
Forum: E-Bike Technical
Topic: Complete bosch performance line cx 2019 removal, need help and advice
Replies: 3
Views: 398

Re: Complete bosch performance line cx 2019 removal, need help and advice

This whole situation has made me tear up and break down more then once, my only option left is to remove everything from the frame and attempt to fit an aftermarket mid-drive setup to the existing mounting holes Unfortunately as you've probably noticed the Bosch motor mounts are non standard and I ...
by district9prawn
Feb 26 2020 7:19am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 262
Views: 36212

Re: Serious FOCer (84V VESC 6 based controller)

One question that's bothering the electronics noob that I am: why do vesc require that powerful drv's ? Is that a design choice ? Originally I think Benjamin wanted to reduce the component count and cost to make it easier for users to solder their own vescs from blank pcbs. The drv isn't a particul...
by district9prawn
Jan 31 2020 8:01am
Forum: Items for Sale - New
Topic: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499
Replies: 214
Views: 23900

Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Those are some fine looking boards!

Have you seen the zero speed sensorless HFI (high frequency injection) feature in the latest firmware?
by district9prawn
Jan 09 2020 6:03am
Forum: E-Bike Reviews & Testing
Topic: CA3+PAS with VESC
Replies: 6
Views: 814

Re: CA3+PAS with VESC

On the vesc you will need to configure it for 0% power at 1ms pulse and 100% power at 2ms pulse. By default it might be something like 0% power at 1.5ms, with 1ms and 2ms pulses giving full power in forward and reverse.
by district9prawn
Dec 30 2019 6:08pm
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 80
Views: 25954

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

I made the switch to Linux this year. Still some games and cad software which need windows. I didn't want to dual boot and didn't like mucking around trying to get them to run well under Linux. I've been running windows in a kvm which seems to give pretty much the same performance as a regular insta...
by district9prawn
Dec 27 2019 5:38pm
Forum: Battery Technology
Topic: potting compound for batteries
Replies: 34
Views: 2218

Re: potting compound for batteries

What I've done on a couple of batteries is just pour epoxy potting compound over the top of the cell holders without any sort of mold. This was over 4 years ago and the batteries have all done fine and it seems it will hold until the cells no longer have useful capacity/IR. The sides of the cells ar...
by district9prawn
Dec 16 2019 6:46pm
Forum: Motor Technology
Topic: Roman Kostrygin - Sur-Ron 16kw outrunner
Replies: 66
Views: 8328

Re: Sur-Ron 16kw outrunner

I'm curious how the no load current looks at higher rpm. The rotor looks quite thin.

Mechanically it looks good though.
by district9prawn
Dec 10 2019 7:27pm
Forum: E-Bike Technical
Topic: Help: Phaserunner Phase Current Troubleshooting
Replies: 16
Views: 1211

Re: Help: Phaserunner Phase Current Troubleshooting

If you try all different phase combinations and the phase runner always gives the same "No current on yellow phase" error then problem should be the controller. If the phase runner detects a shorted phase then it disables the mosfets and refuses to drive the motor. Not the case here. I think your ph...
by district9prawn
Dec 10 2019 8:59am
Forum: E-Bike Technical
Topic: Help: Phaserunner Phase Current Troubleshooting
Replies: 16
Views: 1211

Re: Help: Phaserunner Phase Current Troubleshooting

These controllers are smart so all phase combinations are equally valid. Swapping a pair of wires will make the motor run backwards.
by district9prawn
Dec 09 2019 9:38pm
Forum: E-Bike Technical
Topic: Help: Phaserunner Phase Current Troubleshooting
Replies: 16
Views: 1211

Re: Help: Phaserunner Phase Current Troubleshooting

It sounds like your motor is fine if it works in sensorless. The ASI controllers are quite sensitive to phase shorts to ground or positive supply, even if its not a dead short. I'm not sure I have really used the halls sensor start-up or not with this set-up because I think I have always gotten this...
by district9prawn
Nov 07 2019 9:18am
Forum: Vendor Relations Corner
Topic: Alan From ERT bad business!!
Replies: 13
Views: 2539

Re: Alan From ERT bad business!!

Just wondering but why aren't people just buying the controller straight from ASI and getting the included 1 hour programing walkthrough with a controls engineer from ASI? I imagine its just cost. I didn't consider the extra support and bluetooth app of the evaluation kit to be worth $150. I bought...
by district9prawn
Oct 27 2019 4:28am
Forum: Motor Technology
Topic: ASI bac2000 and bacdoor 1.5.4
Replies: 7
Views: 878

Re: ASI bac2000 and bacdoor 1.5.4

I've tried a very old version of bacdoor from when Grin first introduced their phase runner and it worked fine with the new bac4000. I asked asi if the new software was ok on old controllers and that too they said was ok, but some objects in the dictionary will be different. No settings went horribl...
by district9prawn
Oct 23 2019 11:51pm
Forum: Stand-up E-scooters and E-skateboards
Topic: VESC - Motor will not start until a small kick is applied from a full stop despite using hall sensors
Replies: 2
Views: 887

Re: VESC - Motor will not start until a small kick is applied from a full stop despite using hall sensors

If you go to sampled data can you capture the hall sensor values stepping through their six states as the motor turns?
by district9prawn
Oct 22 2019 8:04pm
Forum: Motor Technology
Topic: Same debate again, motor windings!
Replies: 96
Views: 6052

Re: Same debate again, motor windings!

5. Any motor is capable of only so much wattage. Current is what heats up a motor, not voltage. So to maximize motor wattage, run it at higher voltage and less phase current so it heats up less. I feel like this interpretation of voltage and current is where a lot of misunderstanding comes from. Mo...
by district9prawn
Oct 21 2019 6:32am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 262
Views: 36212

Re: Serious FOCer (84V VESC 6 based controller)

Bummer DRV dead before you even put any power through the mosfets? Hopefully this new drv is more robust than the 8301/8302.

Cold joint on DRV current sense would cause it. This new DRV is leadless right?
by district9prawn
Oct 16 2019 7:20pm
Forum: Items for Sale - New
Topic: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499
Replies: 214
Views: 23900

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

Powervelocity.com wrote:
Oct 16 2019 1:29pm
I am also considering offering a GPS/LTE extension for the BT module and the controller to enable remote features like alarm/tracking and cloud data logging.
Have you seen the most recent version of vesc tool that logs and displays gps/maps along with the usual measurements?
by district9prawn
Oct 11 2019 6:54am
Forum: E-Vehicles General Discussion
Topic: Large drone motor for go kart
Replies: 17
Views: 1864

Re: Large drone motor for go kart

The whopping pole count of 42 means you need a 50000 erpm capable controller just to spin the shaft at 2500 rpm. If you go through some old posts here you will find some tests on large Hobby King outrunners demonstrating extreme core losses at high speed. No idea if this is the case with T-motor but...
by district9prawn
Oct 10 2019 6:43pm
Forum: E-Bike General Discussion
Topic: Show me your front light(s)
Replies: 41
Views: 3361

Re: Show me your front light(s)

How do you like the light pattern? Does it do a good job for you in fully dark situations at say 28 mph? Would a second one (800 lumens total) help? In complete darkness I'm not confident I could avoid all potholes etc at 28mph. More comfortable at 20 mph. Similar situation for off road. I'm sure a...
by district9prawn
Oct 10 2019 5:45am
Forum: E-Bike General Discussion
Topic: Show me your front light(s)
Replies: 41
Views: 3361

Re: Show me your front light(s)

Just upgraded my front light recently to the following from Grin: Roxim X4 Ebike Light https://www.ebikes.ca/shop/electric-bicycle-parts/lights/roxim-x4-ebike-light.html I've been using that Roxim one for about two years now. Not the brightest light out there but a very sensible output for urban ri...
by district9prawn
Oct 10 2019 5:21am
Forum: EV Business World
Topic: Vedder VESC
Replies: 1
Views: 717

Re: Vedder VESC

I haven't used the maytech one but if it is anything like the Flipsky one it means the lid on the case has an O-ring. The pcb itself won't have any conformal coating and water can still track inside the case through the connectors and wires.