BBSHD on 72V 50A controller?

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SwampDonkey   100 W

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BBSHD on 72V 50A controller?

Post by SwampDonkey » Sep 16 2019 12:33am

Howdy!

Im starting a build for a friend of mine who both wants a little more power from their BBSHD, and had an unfortunate accident that severely damaged their Befeng quipped bike.

I tend to build around 72V controllers, but typically use Cyclone mid drives on my personal bikes.

Anyhow, have any of you run 72V through an external controller on a BBSHD?

Could this damage the motor?

Will this thing handle 1500W? How about a Cyclone stock controller pushing close to 3000W?

kcuf   100 W

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Re: BBSHD on 72V 50A controller?

Post by kcuf » Sep 16 2019 10:13am

1500w continuous will damage bbshd/03

short bursts usually don’t

unless too many bursts

non-sinewave controller will sound like engraver
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dustNbone   10 kW

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Re: BBSHD on 72V 50A controller?

Post by dustNbone » Sep 16 2019 10:27am

With precautions 1500W/72V could be ok, but don't use that godawful cyclone controller. Not only will it sound loud, it will transmit a nasty vibration up the seat post that will make your private parts go numb after a while. I'm not a doctor but I don't think that's good.

It will need to be ridden with some mechanical sympathy, no top gear full throttle starts. If your friend is the type of idiot that breaks things all the time and has no idea how to fix them because he has no idea how they work, then you shouldn't soup up his BBSHD.

AZeBikeGuy   10 W

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Re: BBSHD on 72V 50A controller?

Post by AZeBikeGuy » Sep 16 2019 10:52am

72V should pose no issues in and of itself and should be better for the motor at a given power level (lower current for same power)

Like others are saying maximum continuous power is what you need to watch

Tommm   10 kW

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Re: BBSHD on 72V 50A controller?

Post by Tommm » Sep 16 2019 11:18am

50a is too much. 72v 30a or 35a will last much longer.

StinkyGoalieGuy   100 W

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Re: BBSHD on 72V 50A controller?

Post by StinkyGoalieGuy » Sep 16 2019 4:21pm

This is a good thread for reference: viewtopic.php?f=4&t=91775

john61ct   100 GW

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Re: BBSHD on 72V 50A controller?

Post by john61ct » Sep 16 2019 4:52pm

Tommm wrote:50a is too much. 72v 30a or 35a will last much longer.
A 50A controller just means that's the most **it** can handle.

Easily limit the motor amps to much less, no problem

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