Domino throttle

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steven7601   10 W

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Domino throttle

Post by steven7601 » Aug 02 2018 11:14pm

Can anyone tell me were I can buy a domino throttle.

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bigbore   1 kW

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Re: Domino throttle

Post by bigbore » Aug 03 2018 1:09pm


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Alan B   100 GW

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Re: Domino throttle

Post by Alan B » Aug 03 2018 1:51pm

It would be good for the original poster to put at least a general location into his settings to guide people answering his questions.

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Skaiwerd   100 W

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Re: Domino throttle

Post by Skaiwerd » Aug 12 2018 8:05pm


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methods   10 GW

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Re: Domino throttle

Post by methods » Aug 16 2018 7:02pm

I bought some from them, it went fine.

Note that the Domino on the Zero is dual hall and the Domino available is 5k pot.

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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Alan B   100 GW

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Re: Domino throttle

Post by Alan B » Aug 16 2018 7:12pm

methods wrote:
Aug 16 2018 7:02pm
I bought some from them, it went fine.

Note that the Domino on the Zero is dual hall and the Domino available is 5k pot.

-methods
That's interesting. Where is the dual hall Domino version available? (note that I've had no problems with the sealed, weather rated pot version).

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methods   10 GW

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Re: Domino throttle

Post by methods » Aug 26 2018 4:16pm

I have seen them overseas but they are more a company that you spec and order batches from...
So from the supplier

I am sure you could get sample batches out of them - 5 could happen but 20 is where I usually start
(Enough to convince them that you are doing an engineering evaluation)

Zero specified the dual-hall in an attempt to improve safety and interlocking around their throttles. Turns out the Sevcon wont reliably accept this input (or so I am told) so one input goes to the Sevcon and the other goes to the MBB - for a 2 factor authentication.

Big picture - we need 2 "intents" to apply power in excess of about 1hp

I like a pot with a switch at zero.

Opposite facing hall sensors do as well - but require smarts - as both are obviously analog signals.

Golf Carts have always had this inherent in the design.
I have absolutely no idea how Zero got bikes on the road which did not have interlocks on the throttles... but they did.

Regulatory is way behind in the EV scene... and motorcycles are way down the safety list... as by their very nature they are an acknowledgement of a ... eh... high tolerance for risk.

I am still ranting at those bastards (Zero) to understand that their battery design will be found to be not in compliance... but they do not listen. Mostly because they think nobody around is qualified to even understand what it does, let alone how it fails, and how this impacts regulatory.

They think they are getting away with something.
They are simply getting ready to get swatted in the ass.

Pisses me off just to think about it
So I dont

Anyway... Throttles
Pick one that is first IP67 (Domino rates their throttles)
Pick one that has a secondary interlock (Hall digital Switch, physical Micro Switch, Second analog sensor, other)
Make sure
that in some way
If voltage is cleverly applied to your throttle (vs ground) that there is no way the bike (or vehicle) can move - without the secondary intent being triggered.

We guard only against single point failure
Not against cascade or multi-point failure

... the battery ... has a single point failure... especially and end of life...

It is very easy for one of the 4 cell boxes
To have one wire dissconnected from the parallel harness
Meaning the BMS can not see or read balance it
Meaning it is not being held parallel to the other three cells

Such that when you bulk charge
It is possible for this one cell
To charge beyond safe limits

it is possible
For this one cell to discharge beyond safe limits

HOw this turns into pack failure or fire or smoke or ... anything else?
Does not matter
Its a general principle thing

We dont design single point failures into large lithium batteries that are charged indoors and discharged out where fires can start.

Likelihood?
Exponentially growing thru time

Hence why my volume is exponentially growing in the YELLING I am doing at them

They can start by hiring some Electrical Engineers on their Electric Project... instead of allowing those who dont actually know what they are talking about to ... to continue with the charade.

As always
As soon as it is fixed
I will shut up

I make no money off of them or their competitors
When I did work for them they paid shit and I was happy to leave to Tesla

Yep - I love every EV company - but when you claim to be the leaders... you better know what the frock you are doing.

-methods
Increasing battery voltage and controller current limit will result in a non linear experience

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