Search found 87 matches

by KD5ZXG
Jul 20 2018 7:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: Improving original firmware - TongSheng TSDZ2 mid drive motor
Replies: 124
Views: 12280

Re: Improving original firmware - TongSheng TSDZ2 mid drive motor

The good news, I remembered to bring my XH18 to throw under bus, or the the ray, or whatever. Actually X-Rays shoot upward to the scintillator located at the top of the box. Underneath is not even in the picture. But right now, I have a pile of real work that has to be done first. Spare minutes at t...
by KD5ZXG
Jul 20 2018 12:06am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6641
Views: 674924

Re: New "TSDZ2 Torque Sensor Central Motor"

Which alloy might that be cast from? I have my suspicions, from watching how loudspeaker baskets were being cast in China. https://en.wikipedia.org/wiki/Zinc_aluminium Could you repair it with a stick made for aluminum? Or would zinc pot metal stick be more appropriate? Maybe this stuff??? https://w...
by KD5ZXG
Jul 19 2018 8:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Improving original firmware - TongSheng TSDZ2 mid drive motor
Replies: 124
Views: 12280

Re: Improving original firmware - TongSheng TSDZ2 mid drive motor

I'm not willing to tear open and unpot my xh18 for this research.

On the other hand, if you want to know where all the traces go,
I am willing to XRay it. Machine made for PCB inspections, not
some medical thing. Maybe tomorrow, if I remember to bring.
by KD5ZXG
Jul 19 2018 2:00am
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

I can think all kinds of uses for a cadence faker, except I have the torsion sensor instead. Maybe BBSHD next bike. May need to rig another sort of deadman switch though... ------ So, I got part of the sim running. Forward pass balances pretty good, but the flyback pass is messy with too much ringin...
by KD5ZXG
Jul 18 2018 7:50pm
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

Try drawing this again.
Untangled for easier reading.
Same circuit, excepting R5, C5.
Mistake2.png
Mistake2.png (29.47 KiB) Viewed 5290 times
by KD5ZXG
Jul 18 2018 3:23pm
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

Oscillates? Maybe thats what happened... The first one I breadboarded worked fine, but ran away when asked to bypass more than 1A. Just assumed the Darlington wanted a heatsink. And a series resistor to limit current just incase it ever happens with a real battery, which will also remote locate half...
by KD5ZXG
Jul 18 2018 2:05pm
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

I'm not exactly following what the circuit is doing. Are all the coils on the same core? There are some off-the-shelf chips that can do non-dissipative balancing using discrete inductors. Check out this one from TI: The EMB1499Q bidirectional current dc/dc controller IC works in conjunction with th...
by KD5ZXG
Jul 18 2018 4:23am
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

I already see a problem. Won't be any VoltSeconds reset when the top cap is fully discharged. Flyback into zero volts is freewheeling, not pushing the field back to reset. One Shottky drop, but that's still hardly anything... Transformer might saturate before that cap is charged to function. May nee...
by KD5ZXG
Jul 18 2018 2:22am
Forum: E-Bike Technical
Topic: Upload Your Circuit Schematics & Requests Here...
Replies: 542
Views: 204117

Re: Upload Your Circuit Schematics & Requests Here...

Havn't yet plugged in everything needed for this active balancer simulation. Reality wants more cells, but would clutter the drawing and slow LTSpice. The theory of operation (if no grotesque errors were made) is that a brief pulse would cause all mosfets to turn ON hard simultaneously. Isolated win...
by KD5ZXG
Jul 14 2018 2:12am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6641
Views: 674924

Re: New "TSDZ2 Torque Sensor Central Motor"

Perhaps for a dumb pack, that much safety margin is reasonable. For a smart pack that knows when the weakest cell approaches 2.5V, a 41V or even 42V cutoff is much too conservative. (4000) contains a value that I suspect is undervoltage lockout. The value stored at (4000) in Eyebicycle's screenshot ...
by KD5ZXG
Jul 13 2018 10:29pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6641
Views: 674924

Re: New "TSDZ2 Torque Sensor Central Motor"

I havn't any ST-Link yet, and havn't even spun up my TSDZ2. Still working to build my battery management shunts and get the right side of the old bottom bracket out. I bought all the nuts and bolts for a Sheldon tool, so maybe this weekend I'll at least have the motor in place. I've got eyebicycle's...
by KD5ZXG
Jul 13 2018 10:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hi, TSDZ2 any coaster brake users? BBSHD build thoughts
Replies: 11
Views: 3808

Re: Hi, TSDZ2 any coaster brake users? BBSHD build thoughts

https://www.youtube.com/watch?v=u-SY0rGMEMo This video (not mine) appears to show the relevant sprag. Maybe flush out all the grease and re-pack with JBWeld? Buy a spare first, just incase the experiment goes wrong. Instead, I've ordered a Sturmey Archer RXL-RD5 to deal with the braking issue. The c...