Search found 204 matches

by Addy
Sep 23 2019 2:44pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

It's been too long since I posted an update here :oops: I have been busy this summer with trips, family events and other tasks. Some progress has been made with the ESC. I started my own fork of the VESC firmware, right now the only unique thing is the hardware config files needed for the SmootheDri...
by Addy
Jun 05 2019 10:56am
Forum: Battery Technology
Topic: Spacer/Holder for 21700 cells
Replies: 11
Views: 674

Re: Spacer/Holder for 21700 cells

Turns out 3d printing is more expensive than I expected, I was thinking like £50 or something - the 3dhubs quote was over £200 :( guess I'll need to look into other options That's a shame. At that point it's almost cheaper to buy your own 3D printer and print the holders yourself. Were you looking ...
by Addy
May 24 2019 11:28am
Forum: Motor Technology
Topic: Can any FOC or sinewave sensorless controller handle an astro 3220?
Replies: 24
Views: 986

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

Have you considered a VESC variant? The VESC 6 or VESC 75/300 can handle fairly high ERPM. I think the 75/300 would be better for a low inductance motor because you could set the PWM frequency higher. This video shows the 75/300 running a low inductance high ERPM motor: https://www.youtube.com/watch...
by Addy
May 24 2019 11:13am
Forum: Battery Technology
Topic: Spacer/Holder for 21700 cells
Replies: 11
Views: 674

Re: Spacer/Holder for 21700 cells

If you have access to a 3D printer, you can use these cell holders:
https://www.thingiverse.com/thing:3029966

They're customizable, so you can make them fit 21700 cells easily.
by Addy
Apr 23 2019 10:06am
Forum: Battery Technology
Topic: A123 LiFePO4 BAE System Module Teardown
Replies: 14
Views: 635

Re: A123 LiFePO4 BAE System Module Teardown

Most of these currently being sold are in very poor shape, that's why they were pulled from the buses. That was the case for me. I bought 2 of these packs and got a pretty good deal on them. I've disassembled one of the packs and made a truck starter battery with it. I tested the cells, they have ~...
by Addy
Apr 17 2019 12:35pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

After the testing I did in my last post, I started having trouble with the 12V supply. If you try to draw more than ~2.5A, it goes into "hiccup" current limiting mode. I've been doing a lot of troubleshooting to figure out the cause of this. By design, the supply should put out well over 3A before d...
by Addy
Apr 02 2019 11:08pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

Today I installed all the parts needed for the 12V DC/DC converter on a board so I could do some stress testing. 20190402_195557.jpg The DC/DC converter is set up to put out about 13.5V. It's a bit higher than 12V, which helps for running accessories like automotive lights at full brightness. To str...
by Addy
Apr 01 2019 8:57pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

PCBs arrived today! I think they turned out pretty good.

20190401_183821.jpg
20190401_184257.jpg
20190401_183908.jpg
The PCBs also fit very nicely in the aluminum cases.

My parts order has also arrived, so I'll be able to start assembling a board and doing some testing.
by Addy
Apr 01 2019 2:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Vector Typhoon finally
Replies: 4
Views: 410

Re: Vector Typhoon finally

I have the same frame. I also had to spend a bit too much time filing the dropouts so they would fit my motor.

To get my seat lower, I cut my seat post shorter with a hacksaw and sanded the rough edges smooth.
by Addy
Mar 27 2019 11:10am
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

I'm almost done putting the BOM together. I would estimate that for the initial run I could sell these controllers for around ~$450 CAD (~335 USD).
by Addy
Mar 26 2019 2:43pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Re: Smooth eDrive - VESC compatible ESC development

Progress so far:
The PCB layout is complete and some prototype PCBs have been ordered. The aluminum cases have already arrived. Next I will put together a parts order so I can start assembling some prototype controllers once the PCBs have arrived.
by Addy
Mar 26 2019 2:42pm
Forum: Motor Technology
Topic: Smooth eDrive - VESC compatible ESC development
Replies: 13
Views: 1019

Smooth eDrive - VESC compatible ESC development

Hello! It's time to share the project I've been working on for several months now. I will post updates here of development progress and test results. Description Smooth eDrive is a VESC compatible 12-FET ESC for ebikes. It's designed to be powerful without breaking the bank. I've been using a VESC V...
by Addy
Mar 21 2019 9:55am
Forum: Battery Technology
Topic: New weldless battery system crowdfunfing project
Replies: 84
Views: 5261

Re: New weldless battery system crowdfunfing project

On the other hand, if you clamp too hard you can dent the cell. I have dented some cells when pressing too hard with a spot welder, specifically on the positive side of the cell.
by Addy
Mar 18 2019 1:25pm
Forum: Battery Technology
Topic: Sony VTC6 - a 3000mAh/30A monster in 18650 size
Replies: 19
Views: 1294

Re: Sony VTC6 - a 3000mAh/30A monster in 18650 size

john61ct wrote:
Mar 18 2019 11:59am
Personally I think even a 3V cutoff would be destructive.
Here's a link to the datasheet: https://keeppower.com.ua/download/01-20 ... mation.pdf

What makes you think that 3V cutoff would be destructive?
by Addy
Jan 29 2019 2:58pm
Forum: E-Bike General Discussion
Topic: VESC ADC input help
Replies: 7
Views: 578

Re: VESC ADC input help

VESC_ADCs.gif Here is a rendering of the VESC 4.12 PCB with the ADC inputs marked. For my ebike I have the throttle signal connected to ADC. I have a variable regen signal connected to ADC2. Your throttle/regen devices should have 3 wires each: Power Signal Ground Power wires should connect to one ...
by Addy
Jan 29 2019 12:18pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 204
Views: 15670

Re: Cheap VESC (VESC 4.12 redesign)

Nothing I did resolved the "ghost current" and the minute amount of duty cycle percentage that was being displayed. I found out that this seems like normal behavior of an idle VESC after viewing the video from the link below and other screen shots of people's VESC real time data. Real time data at ...
by Addy
Jan 25 2019 1:05pm
Forum: Battery Technology
Topic: 150 Watt load tester
Replies: 10
Views: 696

Re: 150 Watt load tester

I bought one of these on ebay and ended up with a counterfeit unit. The voltage and current measurements were inaccurate to the point where it's useless as a tester for me. The counterfeit unit also has different software that doesn't allow calibration, I believe the original units can be calibrated...
by Addy
Dec 19 2018 7:31pm
Forum: Stand-up E-scooters and E-skateboards
Topic: VESC suitable for a heavy person
Replies: 4
Views: 457

Re: VESC suitable for a heavy person

I don't think you would damage the VESC as long as you set up the current and temperature limits. I use a VESC 4.12 on my vector ebike. I use a 12s lipo battery and I limit battery current to 60A, phase current to 110A. Since my VESC is installed inside my frame, I have a small PC fan pointed at it ...
by Addy
Dec 17 2018 4:38pm
Forum: Battery Technology
Topic: 3D Printed Cell Holders
Replies: 8
Views: 788

Re: 3D Printed Cell Holders

Nice work, but I'd recommend a holder form which does not require soldering, at least on the negative pole of the battery. Check out some bus-bar / single cell fuses / large patches layouts around here. The examples I posted use soldered connections, but the script can generate holders for bus-bar ...
by Addy
Dec 17 2018 4:31pm
Forum: Battery Technology
Topic: 3D Printed Cell Holders
Replies: 8
Views: 788

Re: 3D Printed Cell Holders

Thanks for posting this, it's awesome! I could trim away the parts I don't need, in order to make any shape I wanted... I'm glad you like it. As for trimming away parts, that's probably not necessary. You can adjust the parameters in the script to make cell-holders for single cells or up to as many...
by Addy
Dec 17 2018 1:00pm
Forum: Battery Technology
Topic: 3D Printed Cell Holders
Replies: 8
Views: 788

3D Printed Cell Holders

Hex-Cell-Holder A parametric OpenSCAD project to generate STLs models of hexagonal lithium cell holders, boxes, and caps to be 3d printed. giphy[1].gif O8yBjoj.jpg ffPChFY[1].jpg I0l7Nm4.jpg kKj4PKd.jpg How does it work? Hex-Cell-Holder uses OpenSCAD to create solid 3D CAD objects. Openscad allows ...
by Addy
Dec 12 2018 7:02pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 204
Views: 15670

Re: Cheap VESC (VESC 4.12 redesign)

How many? You need to stamp the 2mm cap to create a tiny channel for the o ring, about 0.6-1mm deep. For 2pc, you can use a dremel. Than its just a matter of finding he right sized nitrile o ring. Thanks for the suggestion. I have 20 of these cases, so I won't be able to dremel them all. I'm thinki...
by Addy
Dec 11 2018 7:25pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 204
Views: 15670

Re: Cheap VESC (VESC 4.12 redesign)

Awesome. 12FET should be the ultimate goal. This could become the ultimate controller for us fairly easily, if the design can scale to 100A capability. Bonus points if you can crank up the peak voltage handling to 96V. Don't get stuck on the TO-200 package though unless you have determined that the...
by Addy
Dec 11 2018 3:38pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 204
Views: 15670

Re: Cheap VESC (VESC 4.12 redesign)

Awesome - count me in for testing. I always wanted to try VESC with regen on an ebike. Drilling new holes is not a problem. What might be is proper sealing. Never seen a KT-style controller stay completely dry. Once you have finalized the size, I can help you find o-ring sealed side caps for the al...
by Addy
Dec 03 2018 2:18pm
Forum: Items Wanted
Topic: Fork Fenders DNM USD-8 upside down
Replies: 5
Views: 648

Re: Fork Fenders DNM USD-8 upside down

I have the USD-8A fork and I also need these parts. They were included with the fork when I bought it, but I broke one of them and it seems there is no glue that will hold it back together. I emailed DNM asking where I could buy these parts (dnm@dnmshock.com) They told me they charge $12 USD per set...