kelly kls7212n suitable motor

General Discussion about electric bicycles.
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project@sr   100 µW

100 µW
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Joined: May 10 2021 8:41am

kelly kls7212n suitable motor

Post by project@sr » Jun 09 2021 6:25am

suggest Best suitable motor and max power for kelly kls7212n controller :flame: :wink:

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MadRhino   100 GW

100 GW
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Location: Montreal QC Canada

Re: kelly kls7212n suitable motor

Post by MadRhino » Jun 10 2021 7:10am

It can feed 160A for 90 seconds, 60A continuous. Yet it is rated 1800w continuous, which does correspond to its maximum continuous Amps at its minimum voltage of 30v (30 X 60 : 1800). Since its maximum voltage tolerance is 90v, the theorical maximum power attainable should be 14400w, if the software does let you set the max Amps at max voltage. Yet it could only feed that much for a few seconds before overheating, but this controller has a temp safety function that would prevent overheating by limiting the power.

You should normally stick to the 1800w continuous figure, thus the best ‘performance’ motor for it should be able to be fed 1800w continuous. BUT, there are other factors of selection for a motor, that concern the bike’s purpose and rider’s preferences. A programmable controller is meant to be set to match the battery/motor combo, not the other way around.
Make it fool-proof, and I will make a better fool.

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E-HP   100 MW

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Re: kelly kls7212n suitable motor

Post by E-HP » Jun 10 2021 10:16am

MadRhino wrote:
Jun 10 2021 7:10am
It can feed 160A for 90 seconds, 60A continuous. Yet it is rated 1800w continuous, which does correspond to its maximum continuous Amps at its minimum voltage of 30v (30 X 60 : 1800).
Not sure how this factors into the calcs, but per Kelly's FAQ, their ratings are motor current, not battery input current (which makes them hard to compare with other controllers ratings).

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MadRhino   100 GW

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Re: kelly kls7212n suitable motor

Post by MadRhino » Jun 10 2021 4:40pm

Yep. That is why I said ‘It can feed’.
You can presume that it does pull about half the output Amps from the battery, which would compare with a 80A controller that is spec for battery current.
Make it fool-proof, and I will make a better fool.

999zip999   100 GW

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Re: kelly kls7212n suitable motor

Post by 999zip999 » Jun 10 2021 5:35pm

What's your donor bike. What kind of battery room do you have ? Where you going to put the controller ? The Battery is the heart of any ebike.
A mxus 3,000 is a start.

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