Search found 440 matches

by cycborg
Apr 20 2019 10:44am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1188
Views: 195923

Re: Compact Field Oriented Controller, ASI + Grin, limited run

It's been on the Grin website since January, but it hasn't been mentioned here or elsewhere on ES that I can find. There's a new lower-power version of this called the Baserunner which was designed for the Hailong battery base. Specs are max 55 A phase current and 60 V battery, vs. 93 A and 90 V res...
by cycborg
Mar 09 2019 11:48am
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 750
Views: 178624

Re: CHEAP NEW ORIGINAL CELLS LI-ION 18650

eee291 wrote:
Mar 06 2019 3:08pm
I use PCB pliers with very good results.
I use this exact model https://www.dmr-electronics.com/en/coax ... liers.html
Thanks, this actually works pretty well. The contacts aren't perfectly flat, but flat enough for rewelding.
by cycborg
Mar 06 2019 2:56pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 750
Views: 178624

Re: CHEAP NEW ORIGINAL CELLS LI-ION 18650

Anyone have tips for removing the welding leftovers from "unwelded" cells? Grinding them down with a Dremel seems straightforward if tedious, but my concern is metal filings getting inside the cells on the positive side.
by cycborg
Dec 22 2018 12:36pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton SVMC072150 controller review, variable regen *PICS*
Replies: 291
Views: 46726

Re: Sabvoton SVMC072150 controller review, variable regen *PICS*

In summary I ask What is the output signal from a hall wire? What numbers of wires do I need as a minimum and how do I connect this/these wires to only get that signal? You may have figured this out, but here's my two cents. On my Sabvoton, for any connector that has a black wire (throttle, halls, ...
by cycborg
Dec 11 2018 10:43am
Forum: Battery Technology
Topic: DIY battery enclosures
Replies: 17
Views: 665

Re: DIY battery enclosures

Thanks, I might go with your suggestion from that thread for ABS forming. I did a little searching elsewhere and found this step-by-step.
by cycborg
Dec 10 2018 4:17pm
Forum: Battery Technology
Topic: DIY battery enclosures
Replies: 17
Views: 665

DIY battery enclosures

I think this is an under-discussed aspect of battery building, so if this evolves into a general discussion of ideas/solutions/resources, I won't mind, but I am hoping to get some input on my specific situation. I'm building replacement batteries for an electric scooter, the Evader EV1000. It shippe...
by cycborg
Sep 29 2018 10:01pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1188
Views: 195923

Re: Compact Field Oriented Controller, ASI + Grin, limited run

I'm not familiar with this. But If you could give me a schematic, layout and other stuff required for diy I could try. In amberwolf's post that you just quoted, he encourages you to read up on the Lebowski controller, which provides exactly what you're asking for. He posted this nearly two months a...
by cycborg
Sep 29 2018 1:17pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1188
Views: 195923

Re: Compact Field Oriented Controller, ASI + Grin, limited run

The manufacturing cost for this, if made in bulk, I think not more than 10-15$. If you count how many people could potentially buy a replacement controller you could get much more profit if you sell for affordable price. I don’t understand why you’re wasting your time complaining on message boards ...
by cycborg
May 18 2018 2:10pm
Forum: E-Bike General Discussion
Topic: Ideas about charging batteries
Replies: 8
Views: 506

Re: Ideas about charging batteries

If you use a Bluetooth BMS you can monitor the cells on your phone.

Manufacturer site
AliExpress vendor
18-page ES thread
by cycborg
May 09 2018 11:45am
Forum: Items for Sale - New
Topic: Smartphone EV trip dashboard + NAV - Android/iOS - $119
Replies: 162
Views: 15519

Re: Smartphone EV trip dashboard - Android/iOS - $99

What's the throttle connector? Does it do throttle mapping with output to the CA connector?
by cycborg
Apr 27 2018 3:39pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 5360

Re: Panosonic 25ah Prismatic cells for sale $22

Couple questions. First, the power and energy numbers don't seem to match the voltage, current, and capacity numbers. For example, 24 Ah at an average voltage of 3.6 V is about 85 Wh, but you're showing twice that. And the initial power of 275 W doesn't match 30 A x 4.15 V = 125 W. What am I missing...
by cycborg
Mar 30 2018 4:26pm
Forum: E-Bike Technical
Topic: Aluminium torque plates: your choice. (Corrected)
Replies: 22
Views: 1262

Re: Aluminium torque plates: your choice.

Good info, and I don't dispute your overall point. Couple critiques of the argument, though. First, 20 Nm at the air gap is... 20 Nm at the axle. Force is multiplied as the radius decreases, not torque. Hopefully Nm vs. N doesn't join Wh vs W in the ES confusion hall of fame. Second, the maximum for...
by cycborg
Mar 28 2018 8:55am
Forum: Items for Sale - New
Topic: Custom Waterjet Cut Parts
Replies: 137
Views: 24469

Re: Custom Waterjet Cut Parts

Sorry, I don't recall, perhaps some searching can find it. 5/8 on each side sounds pretty thick. Here's one thread on aluminum torque plates. https://endless-sphere.com/forums/viewtopic.php?f=3&t=74899&p=1133943&hilit=aluminum+thick+torque+plate#p1133943 Thanks - I had seen Ron's "universal" design...
by cycborg
Mar 27 2018 3:31pm
Forum: Items for Sale - New
Topic: Custom Waterjet Cut Parts
Replies: 137
Views: 24469

Re: Custom Waterjet Cut Parts

Thanks for the suggestions. Regarding this comment: We have seen a few cases of really thick torque arms from aluminum alloy working How thick is thick? My TAs will be doubling as spacers - I'm matching a 4 kW QS scooter motor to a swingarm that was built for a somewhat wider dropout spacing. I'm pl...
by cycborg
Mar 27 2018 12:16pm
Forum: Items for Sale - New
Topic: Custom Waterjet Cut Parts
Replies: 137
Views: 24469

Re: Custom Waterjet Cut Parts

A note for people considering making torque arms or plates from hardened steel - the axles are soft steel, so the torque arm needs to be thick enough to avoid cutting through the soft axle given the force and power level. A hardened torque arm may also be difficult to make "pinch" the axle, the goa...
by cycborg
Jan 30 2018 3:18pm
Forum: E-Bike Technical
Topic: battery / phase current ratio unanswered
Replies: 11
Views: 951

Re: battery / phase current ratio unanswered

No worries, just a difference of opinion on too little vs. too much information. For an OP with a post count of 3 who asks to start from the basics, I'm inclined to err on the side of the former. I also try to give some clue that my knowledge extends beyond my answer, but I may tend to err on the si...
by cycborg
Jan 30 2018 9:41am
Forum: E-Bike Technical
Topic: battery / phase current ratio unanswered
Replies: 11
Views: 951

Re: battery / phase current ratio unanswered

If you want the answer, you have to talk about all of it, becuase that is why it is the way it is. OK. Give me a few years to construct and solve the quantum wave function for the battery-controller-motor system and I'll get back to you. If someone beats me to it, awesome. But don't post anything e...
by cycborg
Jan 29 2018 2:49pm
Forum: E-Bike Technical
Topic: battery / phase current ratio unanswered
Replies: 11
Views: 951

Re: battery / phase current ratio unanswered

The motor is not fed by the battery. It is the controller that is pulling DC current from the battery, then is feeding current bursts to each phase alternatively. When you turn on a lamp, do you say that the switch pulls current from the wall and feeds it to the light bulb? OK, potato, potahto. The...
by cycborg
Jan 29 2018 1:25pm
Forum: E-Bike Technical
Topic: battery / phase current ratio unanswered
Replies: 11
Views: 951

Re: battery / phase current ratio unanswered

From what I read, the controller and motor windings act like a buck converter (similar to a transformer) which causes the motor to get higher current at a lower voltage. The power (voltage X current) stay the same because of energy conservation. Yup, read up on the buck converter on Wikipedia or yo...
by cycborg
Jan 02 2018 9:46am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 115
Views: 14307

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

The number of magnets to pole pairs on a 3 Phase motor... When one pole pair is aligned directly with the magnet it switches to the next phase. Now if the number of magnets is divisible by the number of poles, the next phase is already aligned with the magnet. The field may rotate while it locks th...
by cycborg
Jan 02 2018 9:28am
Forum: E-Bike Technical
Topic: Regen with a BMS that has separate charge port
Replies: 2
Views: 350

Re: Regen with a BMS that has separate charge port

You can charge through the discharge port - the problem is that the BMS won't cut off charging if a cell hits HVC, so you have to monitor your cell balance and terminal charge voltage. There's no problem doing regen through the discharge leads, as long as you don't start fully charged at the top of ...
by cycborg
Dec 21 2017 12:55pm
Forum: Battery Technology
Topic: Multistar charger
Replies: 18
Views: 1826

Re: Multistar charger

If I understand correctly, - you have 6 packs, each 6s 20 Ah, configured 2s3p for overall 12s 60 Ah - you will use an alarm to detect low voltage for discharge - you want opinions on how to charge Did I get that right? A common strategy is to do a bulk charge for routine charging, and occasionally u...
by cycborg
Dec 15 2017 3:59pm
Forum: E-Bike Technical
Topic: Data logging stream out of Phaserunner?
Replies: 3
Views: 526

Re: Data logging stream out of Phaserunner?

If you've installed BacDoor, in the program folder there's a file called ASIObjectDictionary_x_x_x.xml, where the x's are the version number. It's not pretty to look at, but it contains the codes for the MODBUS parameters, as well as units and scale factors for deciphering the replies. The parameter...
by cycborg
Dec 13 2017 10:37am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1015
Views: 70627

Re: bluetooth BMS?

dh68 wrote:
Dec 13 2017 9:24am
How can I calcultate the new capacity of the battery?
thunderheart recently posted some discharge curves for the GA; you should be able to estimate capacity from that. Look at the lowest-current curve and calculate capacity between 4.1 and 3.1 V, then multiply by your parallel count.
by cycborg
Dec 08 2017 2:54pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 29
Views: 9998

Re: Sabvoton MQCON review and documents

Can not tell from the documentation if the failed hall test will send it into default sensorless mode or if it is running off of the settings I saved. Mistery :roll: Sorry I can't give you a better reference, but I have a vague memory of AlanB saying in some thread that these will continue to funct...