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[kencycles]

Hi folks - New 2015 Zero S owner here, and trying to confirm if the R & G Racing Tail Tidy for the 2014 models also fits the 2015 models. R & G told me this week that that they hadn't tried it yet.

- kencycles

[MrDude_1]

My charger will be a bit more crude, but equally as powerful. . followup on that in a later post in this thread.

Farfle, Im still waiting for when you post up about this:



Especially now that I am building one for myself.

[togo]

...Installing a cycle analyst!!

CA's are an awesome dashboard, and being able to know pack voltage/amperage etc... will be very handy for later mods.
This post will be mainly for the groundwork of installing the shunt for the CA, with the rest of the install when I get mine in the mail.

But what shunt!?

I seem to recall Terry showing me his 1000 A shunt.

Googlling, I find things like this http://www.rammeter.com/ram-meter-inc-rfl1000a50-1000-amp-50-dcmv-dc-current-shunt.php

It looks like they have bigger ones too.

http://www.rammeter.com/current-shunts?dir=asc&limit=99&order=price

Is that the right kind of shunt?

[skoleskibe]

My charger will be a bit more crude, but equally as powerful. . followup on that in a later post in this thread.

Farfle, Im still waiting for when you post up about this:



Especially now that I am building one for myself.

Hi been curious for a while. WTF is it, some kind of resonant circuit. Explain ;-)


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[Shadow]

(re: Above) looks like DC-DC regulator?

[MrDude_1]

Hi been curious for a while. WTF is it, some kind of resonant circuit. Explain ;-)

Shadow nailed it:

(re: Above) looks like DC-DC regulator?

Its a DC-DC buck regulator that Farfle posted here: https://endless-sphere.com/forums/viewtopic.php?f=14&t=72431

We independently had the same idea, but he actually completed his before I even started mine.


Short answer is... with modern power MOSFETs driven at high frequency we can run a smaller inductor and make a charger thats truly portable and fits in your hand.
The basic theory is that we dont need perfectly smooth power output, we can allow the power to pulse into the battery.. so using rectified AC power as an input isnt an issue. A more advanced one would follow the AC input with the PWM output and do some power factor correcting, but im more interested in keeping it tiny and simple.
My eventual goal is to have two fan cooled 7kw capable chargers that I can just toss in the tank bag or my backpack... I can then use both to take advantage of whatever power is there... In theory it could charge faster than the supercharger just because I would have two 6.6-ish kw inputs from separate plugs, while it only has one input.

But right now mine is just in testing. I havent even raised the voltage to Zero motorcycle levels yet, I just use it to charge my electric bicycle at a constant 12amp wall draw. I did something stupid, and now I need a new oscilloscope. so until I get one I am flying blind. Its been low on the to-do list for months now.

[skoleskibe]

That' quite intruiging.
Awesome solution, if it can be shut of once the battery reaches 114-115V.


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[MrDude_1]

That' quite intruiging.
Awesome solution, if it can be shut of once the battery reaches 114-115V.


Sent from my iPhone using Tapatalk

That's the easy part. Lol.
When I last left off, I was having mosfet driver issues. I can't check what's going on though until I get a new scope.

[togo]

...Installing a cycle analyst!!

CA's are an awesome dashboard, and being able to know pack voltage/amperage etc... will be very handy for later mods.
This post will be mainly for the groundwork of installing the shunt for the CA, with the rest of the install when I get mine in the mail.

But what shunt!?
...

ping

[MrDude_1]

...Installing a cycle analyst!!

CA's are an awesome dashboard, and being able to know pack voltage/amperage etc... will be very handy for later mods.
This post will be mainly for the groundwork of installing the shunt for the CA, with the rest of the install when I get mine in the mail.

But what shunt!?
...

ping

You can use any shunt, as the cycle analyst is very flexible.
Just pick any shunt that can take the full battery current through it. I would probably go for one thats 450a rated, but you can use your own personal judgement on that.
If you cant use your personal judgement on it and need someone to tell you exactly what shunt to use, you probably shouldnt be doing this mod.

[togo]

...
You can use any shunt, as the cycle analyst is very flexible.

Just pick any shunt that can take the full battery current through it. I would probably go for one thats 450a rated, ...

Thanks Mr. Dude!