Search found 321 matches

by shaman
May 30 2020 9:07am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

I know I've given some timelines and expectations that didn't turn out to be true or were unrealistic to begin with. Here's some of the main issues contributing to the hold up on this stuff. 1. I can't do this full time. My hours have been split between my full time job (electrical engineer), my par...
by shaman
May 06 2020 6:56am
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 36
Views: 16840

Re: Sabvoton MQCON review and documents

@ElectricGod

Any chance of re-uploading the images or passing them to me via PM?
by shaman
May 06 2020 6:50am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

I appreciate you taking the time to read! So both...no kids + long hours. This is for sure my passion. The Little FOCer hasn't shown issues with the 2512 sense resistors and I've taken it up to 90 amps. However I did switch to size 3920 for anything larger for up to 150A. Anything more will require ...
by shaman
May 01 2020 6:00pm
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

https://github.com/shamansystems/Cheap-FOCer-2 I’m happy to finally announce the v0.9 release of the Cheap FOCer 2! Special thanks to @bj97301, @NuRxG, and @Davewesh at the esk8 builders forum for formatting the repo into something truly outstanding, much better organized, and readable by humans. Re...
by shaman
Apr 18 2020 10:29am
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

GitHub repo created and under review. It's private for now until after the review is done. This most recent rev has been working fine in my ebike with 70A motor current. Still making some firmware tweaks before release.
by shaman
Apr 05 2020 12:20pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

@Kalzifa this controller will only do 20S as advertised. Trying for 26s would call for a complete redesign and not just changing out FETs and caps. You might be interested in galp's BESC. It is made for higher voltage
by shaman
Apr 03 2020 11:52am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

Kits are still being considered for a few reasons. I might do a limited production run of some kits after beta testing. The idea is to test out production and customer support for that sort of thing.
by shaman
Apr 02 2020 10:45pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

trial-run.jpg Trial run around the block. Went up to 37mph ebike.jpg janky ebike I threw together to test stuff. 10s batteries in series for a 20s battery. Well I took it around the block a bit. 60A FOC starting at 82ish volts. No issues. I'll be taking it out on a straight road tomorrow when its d...
by shaman
Apr 02 2020 4:53pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

Well let's say i'm getting it dialed in. I'll throw it on my ebike with a 20s battery in a coupe of days. Special thanks to @zombiess for helping with the gate drive strength tuning.
by shaman
Apr 01 2020 11:49pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

SDS00020.jpg
SDS00020.jpg (76.4 KiB) Viewed 978 times
Slow but steady. I'm still working this...
by shaman
Mar 18 2020 8:47am
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

cheap focer 2 new rev .jpeg New rev arrived. Will assemble this and put a scope to it like the other. I made some small gate drive improvements so I want to see if that made a difference. I also want to optimize dead time. Dead time can be set with hardware or firmware. My controller switches a bit...
by shaman
Mar 16 2020 8:52am
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

Beta unit batch.jpeg
Beta unit batch.jpeg (347.05 KiB) Viewed 1325 times
Almost done with the beta units.

Also the newest rev should be in today. It should functionally the same plus the IMU capability.
by shaman
Mar 10 2020 9:51pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

This controller is meant to be a balance of DIY and DFM. The DIY kit should make the DIYers happy since they can solder some components themself and even choose which FETs to use if they wish. Yes figuring out a warranty for this type of thing may be difficult. I'll have to see what sort of warrant...
by shaman
Mar 10 2020 5:11pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

@qwerkus the pricing is different for 4 layer boards with ENIG and springing for the “extended components” in SMT assembly. Plus it’s low-quantity. If you want cheap, then check out my cheap FOCer 2 thread. I’m pretty sure I’ve discussed pricing already but I’m aiming for the little FOCer to be some...
by shaman
Mar 05 2020 11:00am
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

Cheap FOCer 2 order.JPG Still working on the beta units but I've also ordered a prototype of the latest revision. The latest revision has an IMU, minor improvements to the gate drive, optional pullup/pulldown resistors on the ADC channels, and a wider PCB now at 60mm. The wider PCB fits the intende...
by shaman
Mar 05 2020 10:54am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

Little FOCer order.JPG Ordered some prototypes a couple of days ago for the Little FOCer after JLCPCB came back online 100%. I hope these do better with all the improvements. If they pass functional testing, I'm looking at having them double pulse tested. This will be good to really show the gate d...
by shaman
Mar 01 2020 1:55pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

@Addy yes I’m aware of the option of customizable lengths in extruded enclosures. Unfortunately it’s these extrusion designs that don’t optimize heatsinking for FETs mounted to the bottom. These designs tend to optimize heatsinking for FETs mounted to the side walls instead
by shaman
Feb 28 2020 10:20am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

I don't think interference would bother the FETs. If anything this wold bother the control side since it runs underneath that part of the PCB but I'll be accessing that. I've looked at the separated style enclosures before. No pre-made designs seem to offer the heat sinking qualities I'm after. They...
by shaman
Feb 26 2020 6:27pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

One expensive drv instead of 3 gate sub-cicuits. Makes sense. Yeah. There's pros and cons to this but I'm hoping it will work for this level of power under.jpg CFOC2 cables under2.jpg CFOC2 cables front entry So for the motor phase and possibly even battery cables, I think they can be routed undern...
by shaman
Feb 25 2020 1:52pm
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

CFOC2 betas.jpg
CFOC2 betas.jpg (334.77 KiB) Viewed 1719 times
Beta batch in progress
CFOC2 betas 2.jpg
CFOC2 betas 2.jpg (386.63 KiB) Viewed 1719 times
2 beta units. One with phase cables soldered in from the underside

Working on it.
by shaman
Feb 25 2020 8:36am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

Also FYI everyone I’m just waiting for JLCPCB to come back online 100%. They went down due to complications with the coronavirus and still don’t have their assembly service back up and running. I have plenty of work for them once they do though
by shaman
Feb 25 2020 6:48am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36776

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

@qwerkus

Any of the VESCs or knockoff VESCs won't accommodate the new DRV8353. It's a different footprint and is has different registers for setup.There are many other differences between the old DRV and the new one that would prevent a simple swap but those are told in the datasheets.
by shaman
Feb 22 2020 9:01am
Forum: Motor Technology
Topic: DIY Motor Dyno/load?
Replies: 24
Views: 2394

Re: DIY Motor Dyno/load?

I've had several suggest just to use distilled water. Its cheap, easy cleanup, and I can flush it periodically to void impurity build up. Guess that's what I'll do. Maybe I can even make ice from distilled water to further cool the test setup. I will be using two of those QS 3000W mid drives. I thin...
by shaman
Feb 19 2020 2:53pm
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

@marcos thanks for the tips here. My fear is of the water becoming contaminated over time in a garage environment and becoming more conductive. I’ve thought about having the motors in a metal tub submerged in mineral oil. Then having that tub placed in a larger tub that is filled with ice water for ...
by shaman
Feb 18 2020 8:31pm
Forum: Motor Technology
Topic: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (v0.9 release! Beta testing still ongoing)
Replies: 48
Views: 7231

Re: Cheap FOCer 2 (Open-source, Low-cost, VESC 6 based ESC) (Prototyped. Materials have arrived for a test batch)

I think I'm going to bypass potential issues with water and submerge in mineral oil instead. I have a different thread where I'm discussing that in more detail.