Search found 231 matches

by Addy
Jul 21 2020 5:43pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Super Soco TS Upgrade
Replies: 34
Views: 1851

Re: Super Soco TS Upgrade

Is the effect / The real world performance that it is 33kw because the phase amps are 350 but the voltage just lower of course or are you saying 14kw is always 14kw whatever you mix the amps or the voltage to the motor. Are there any advantages or is it just how the controller works. thanks Yes, I'...
by Addy
Jul 21 2020 4:37pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Super Soco TS Upgrade
Replies: 34
Views: 1851

Re: Super Soco TS Upgrade

Its calculated in a different way Battery amps and phase amps. Phase amps is true battery amps I guess but modulated or multiplied by a performance controller. I don't know how it works just that it gives a lot of power. Battery amps max is 150A Battery phase amps from the controller into the motor...
by Addy
Jul 21 2020 12:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using VESC custom app to cut power when stopped
Replies: 2
Views: 133

Re: Using VESC custom app to cut power when stopped

As a different option, have you considered connecting a brake signal to the VESC? If you do that, you can hold your brake lever/button when you're stopped and the throttle signal will be ignored.
by Addy
Jun 22 2020 3:31pm
Forum: E-Bike Technical
Topic: Vesc for ebike
Replies: 2
Views: 142

Re: Vesc for ebike

I use that mode and throttle/brake setup on my ebike. I haven't tried it recently, but I'm pretty sure that when the brake is active, the throttle is ignored.

It would make no sense to have some strange subtraction mode.
by Addy
May 05 2020 12:53pm
Forum: Battery Technology
Topic: High drain vs low drain battery chemistry? What's the difference?
Replies: 22
Views: 798

Re: High drain vs low drain battery chemistry? What's the difference?

The ability to put out a very high C-rate is a new development, and only demanded by certain niche use cases. High C-rate cells have been around for a long time, look at older power tool batteries and RC lipos. Why are they "all over the place"? How could I best explain why one battery is rated 3C ...
by Addy
Apr 24 2020 12:26pm
Forum: Motor Technology
Topic: Why BLDC Kv rating? Why not sine wave frequency?
Replies: 3
Views: 255

Re: Why BLDC Kv rating? Why not sine wave frequency?

This is why you'll see "Max ERPM" ratings on BLDC motor controllers. It's the maximum frequency (not always a sinewave) that the controller can drive the motor with. A BLDC motor produces a back-EMF voltage proportional to it's speed. At the unloaded maximum speed, the back-EMF from the motor is hig...
by Addy
Apr 24 2020 12:08pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 49
Views: 1442

Re: Charging LTO at Max Speed?

It seems like with cc/cv charging, you start by setting max Amp and Volt limits. The charger will then monitor it's Amp output and adjust (raise) output Voltage as needed to maintain that max Amp limit. CC stage. Eventually you end up hitting max outut voltage. Since you can't raise the output volt...
by Addy
Apr 24 2020 2:31am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 49
Views: 1442

Re: Charging LTO at Max Speed?

I get that you don't want to go "inside the black box", but you're trying to explain things that you're not understanding. With a CC-CV charger, it is in CC mode as long as the current is higher than the CC limit. As soon as the current is below the CC limit, the charger is now in CV mode. There is ...
by Addy
Apr 24 2020 2:06am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 49
Views: 1442

Re: Charging LTO at Max Speed?

> Does this mean the charger is somehow monitoring it's amp output, and changing its voltage based on that No. You are incorrect. A CC-CV charger certainly is monitoring it's amp output and changing it's output voltage to keep the current regulated. The current doesn't magically limit itself to the...
by Addy
Apr 22 2020 2:48am
Forum: Battery Technology
Topic: Questions about CC charging
Replies: 12
Views: 527

Re: Questions about CC charging

Chargers use CC regulation to limit the amount of current going into the battery. Very rarely. Grin Satiator can, and lab-style PSUs, feature aka user-defined maximum current level. Just because you don't see many chargers with adjustable current limits, doesn't mean they aren't CC regulated. But d...
by Addy
Apr 22 2020 2:08am
Forum: Battery Technology
Topic: Questions about CC charging
Replies: 12
Views: 527

Re: Questions about CC charging

Constant current means constant amps. For a charger, current flows into the battery when when the voltage of the charger is greater than the battery voltage. The amount of current is determined by the voltage difference between battery and charger, and the resistance of the circuit (resistance of th...
by Addy
Apr 15 2020 5:55pm
Forum: E-Bike Technical
Topic: BLDC Motor watercooling ; weird behaviour
Replies: 4
Views: 182

Re: BLDC Motor watercooling ; weird behaviour

Even with 5V you might still have problems. Also, there's the possibility of the motor phase voltages finding their way through the hall signals when there's water in the motor.
by Addy
Apr 15 2020 2:55pm
Forum: E-Bike Technical
Topic: BLDC Motor watercooling ; weird behaviour
Replies: 4
Views: 182

Re: BLDC Motor watercooling ; weird behaviour

To me it sounds like your hall sensor signals aren't completely insulated, so the water is messing with the signals until all the water is dried and things are back to normal.
by Addy
Mar 29 2020 7:27pm
Forum: Battery Technology
Topic: SCAD 18650 holder generator for 3D printing
Replies: 3
Views: 254

Re: SCAD 18650 holder generator for 3D printing

adrian009 wrote:
Mar 29 2020 2:11pm
You project is amazing! I'm ashamed with my effort :oops:
Thanks. The project is as good as it is because I had other contributors who helped a lot.
by Addy
Mar 29 2020 1:48pm
Forum: Battery Technology
Topic: SCAD 18650 holder generator for 3D printing
Replies: 3
Views: 254

Re: SCAD 18650 holder generator for 3d printing

Your link didn't work for me. I have a project started already for openscad generated holders and boxes. If you want to work together, you're welcome to contribute to that project: https://camo.githubusercontent.com/92958c9df94831e7e2ac8067f808f4b0ef5c71e9/68747470733a2f2f6d656469612e67697068792e636...
by Addy
Mar 17 2020 1:32pm
Forum: Battery Technology
Topic: charger 3kw
Replies: 50
Views: 2359

Re: charger 3kw

As far as I'm aware, the only "harm" to a lithium-ion battery being left on the charger is the minute amount of cycling happening due to self-discharge, besides the capacity loss that happens when cells are kept at high SOC. I can't find it now, but I had read a paper before about measuring the self...
by Addy
Mar 10 2020 3:34pm
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1351

Re: BMS "steam release" post

Those JBD bluetooth BMSs can be configured with the PC software for different series cell counts, according to the pictures they show. Unfortunately you need their PC communication adapter, not sure if you can just use a generic USB->TTL or USB->RS232 adapter.
by Addy
Mar 03 2020 7:37pm
Forum: Battery Technology
Topic: cheap adjustable power supply
Replies: 5
Views: 339

Re: cheap adjustable power supply

Thanks for sharing! I look forward to seeing how you convert these.

Where are you finding these supplies for so cheap? I took a quick look on ebay, these models were more in the range of 50-100, which is not bad considering how powerful they are.
by Addy
Feb 28 2020 12:55pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 268
Views: 38293

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

Either I'll find a cheap off-the-shelf solution or design my own extruded split-style enclosure for manufacturing. I just would be forced to buy a ton of it. You can also get off-the-shelf extruded enclosures in different lengths if that works. For my VESC design I found an extruded case I liked, b...
by Addy
Feb 21 2020 12:07am
Forum: Motor Technology
Topic: Roman Kostrygin - Sur-Ron 16kw outrunner
Replies: 66
Views: 8628

Re: Roman Kostrygin - Sur-Ron 16kw outrunner

MotorModder wrote:
Feb 20 2020 11:18pm
The mods banned this user.
I bet no pics will get put back up now.
He posted lots of great threads.
Hi EG. Nice profile on your new account.
by Addy
Feb 18 2020 6:59pm
Forum: General Discussion
Topic: Lipo vs Lion
Replies: 100
Views: 5217

Re: Lipo vs Lion

yeah. 2 years? Tat is the lifespan when charged to 4.10V? Who said that? I said that I've been using my multistars for 2 years so far and they're doing great. Sure, baby them and you may get happy. Opinion is what matters, and be happy with yours, if we dont have visible fact. You are absolutly ent...
by Addy
Feb 18 2020 6:05pm
Forum: General Discussion
Topic: Lipo vs Lion
Replies: 100
Views: 5217

Re: Lipo vs Lion

Multistars are the worst of the worst , or close to it IMO. Dont buy those if you expect power or longevity. I disagree. My ebike pack is using 4x 6s 10Ah multistars, in a 2S2P arrangement so I end up up with a 12s, 20Ah battery pack. I've been using this pack for 2 years now commuting to work, wit...
by Addy
Feb 05 2020 12:54pm
Forum: E-Bike Technical
Topic: How do I step voltage down with low losses, weight and size?
Replies: 43
Views: 1941

Re: How do I step voltage down with low losses, weight and size?

I don't know why you guys are saying DC would be higher voltage than the AC after rectification, since it's equal to the RMS AC voltage. 160 may very well be peak of AC, but not RMS. biseh[1].gif Even if you're not filtering the bridge rectifier output with a capacitor, the output is going to reach...
by Addy
Jan 20 2020 5:49pm
Forum: Battery Technology
Topic: Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver
Replies: 65
Views: 4187

Re: Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

No one's using LFP for propulsion anywhere that I can see, not for bikes certainly, not much for cars, not even on those huge all-electric ferry boats in Europe. . . They have been used in hybrid bus setups, you can see a datasheet of one example here: https://gettozero.com/pdf/bus/ESS-A123.pdf Tho...
by Addy
Jan 07 2020 4:33pm
Forum: Battery Technology
Topic: Spot welding pen. Has anyone tried this one?
Replies: 23
Views: 1696

Re: Spot welding pen. Has anyone tried this one?

It seems pretty clear to me that this is just a set of spot welding electrodes. It seems logical that the tiny cable is simply going to the microswitch that triggers when you press the electrodes down, to tell your welder when to fire.