Revonte ONE drive system

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punksovereign   1 µW

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Revonte ONE drive system

Post by punksovereign » Feb 23 2020 3:01pm

Hello, I searched around and did not see anything here about this company.
They're from Finland and they make a mid drive with an integrated automatic gearbox with Toyota Prius like technology.

I'm really excited about this one.

https://revonte.com/

https://www.pinkbike.com/news/revonte-l ... motor.html

https://www.youtube.com/embed/NlKcPrzoN1E

they will be at the GoExpo in Helsinki in collaboration with Tunturi Bike on 28 feb - 1 march 2020.
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fechter   100 GW

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Re: Revonte ONE drive system

Post by fechter » Feb 23 2020 7:05pm

That’s pretty cool. A CVT for an ebike. I wonder how the efficiency is? My guess is pretty good since there don’t seem to be many places for losses.
"One test is worth a thousand opinions"

punksovereign   1 µW

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Re: Revonte ONE drive system

Post by punksovereign » Feb 24 2020 5:32am

Yeah, hope to see more details from the inside in the coming weeks. They got 2 mil US $ investment so they must do something right.

punksovereign   1 µW

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Re: Revonte ONE drive system

Post by punksovereign » Apr 13 2021 7:47am



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spinningmagnets   100 GW

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Re: Revonte ONE drive system

Post by spinningmagnets » Apr 14 2021 6:42pm


Grantmac   10 kW

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Re: Revonte ONE drive system

Post by Grantmac » Apr 14 2021 9:29pm

I'm curious about the weight, although it would be unsprung.
Q-factor also looks pretty wide.

SlowCo   1 MW

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Re: Revonte ONE drive system

Post by SlowCo » Apr 15 2021 8:01am

Looks like a promising drive unit.

FlyingFinn   100 W

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Re: Revonte ONE drive system

Post by FlyingFinn » Apr 15 2021 10:50am

It looks promising indeed but it’s already a year late and no deliveries in sight...

pxl666   1 mW

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Re: Revonte ONE drive system

Post by pxl666 » Apr 16 2021 1:43pm

Too bad it won't fit existing frames ... Yamaha for example

qwerkus   10 kW

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Re: Revonte ONE drive system

Post by qwerkus » May 19 2021 4:56pm

Found this one, and wonder what the point is? 2x motors, both with a fixed gear. One just to simulate a cvt, and one to actually provide assistance which bypasses the planetary gears so with a fixed ratio.

So basically an overengineered mid drive working like a geared hub drive. Seriously guys? So much hype nowadays and so little actual progress.

If you are looking for an integrated system that combines gearing and assistanceinto a single mid drive unit, check out kervelo. They have been around for quite some time, and provide actual results. And the fact that they are struggling to achieve any market penetration shows the limitations of the concept.

1boris   100 W

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Re: Revonte ONE drive system

Post by 1boris » May 22 2021 6:56pm

qwerkus wrote:
May 19 2021 4:56pm
Found this one, and wonder what the point is? 2x motors, both with a fixed gear. One just to simulate a cvt, and one to actually provide assistance which bypasses the planetary gears so with a fixed ratio.

So basically an overengineered mid drive working like a geared hub drive. Seriously guys? So much hype nowadays and so little actual progress.

If you are looking for an integrated system that combines gearing and assistanceinto a single mid drive unit, check out kervelo. They have been around for quite some time, and provide actual results. And the fact that they are struggling to achieve any market penetration shows the limitations of the concept.
I think you misunderstand the concept.Its not fixed gear.Thats the whole point with the second motor.To spin the outer ring som the gear ratio is variable.But I also wonder if there is any production problems,because nothing seems to happen with the marketing.

qwerkus   10 kW

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Re: Revonte ONE drive system

Post by qwerkus » May 23 2021 4:02am

1boris wrote:
May 22 2021 6:56pm
I think you misunderstand the concept.Its not fixed gear.Thats the whole point with the second motor.To spin the outer ring some the gear ratio is variable.But I also wonder if there is any production problems,because nothing seems to happen with the marketing.
You mean the first motor (at least in the video). Maybe I'm mistaken, but from what I understand, that motor's purpose is to change the pedal-to-chainring gearing by adjusting the speed of the sun gear in the planetary setup. If you apply a fixed pedaling cadence of like 70-90rpm to the planets (which are connected to the pedal axle), the ratio of the sun gear outer ring (which is the one connected to the chainring) is constant, so effectively a fixed gear assist requiring energy to do the same job a pignon gearbox would do without external energy input, which makes you wonder why one would pedal at all!

Than comes the second motor, directly connected to the same outer ring, also with a fixed gear. So we have 2x electrical motors connected to the output power via a fixed gear; only variable stuff is the pedal to output ratio, which seems to be negligible in a 2kw setup. Sure the energy input of the second motor will make the life of the first one easier, but I don't think there is a net energy saving in that equation...

Like I said: I don't see the point. If you go fixed gear, a left drive system or a any geared hub seem to be a much more cost effective option.

1boris   100 W

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Re: Revonte ONE drive system

Post by 1boris » May 23 2021 8:01am

it also makes the gear variable for the motor.have you seen the video where they test the bike up a steep hill in high gear and slow cadence.you cant do that with other ebikes out there

1boris   100 W

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Re: Revonte ONE drive system

Post by 1boris » May 23 2021 1:35pm


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