Hub motors

[freebeard]

Innovative Wheel Motor Could Change EVs - Autoline Exclusives

35KG means 150lb of unsprung weight with two-wheel drive.

In other news, Buckminster Fuller's Dymaxion Transports used a hinged frame that put the sprung weight and engine on opposite ends of a lever with the passengers in the 'rocking chair'.

These two-speed hub motors in an H-frame suspension with the battery box[es] could give a nice ride in a heavy car.

[freebeard]

This in turn puts me in mind of the Autospeed article on tuned mass dampers:

www.autospeed.com/cms
Mounting big driving lights, Part 2

If the battery box weighs more or less than the tire/wheel/hub motor combo the lengths of the lever arms compensates. Spring rate from the resonant frequency.

[freebeard]

Maybe no-one else thinks about this but I do.

Today I wonder about inwheel suspension and an unsprung hub motor.

The innovation here is putting a twospeed transmission inside the motor rotor. Else the motor would have to be twice as heavy. On the downside it does require an hydraulic system for cooling, lube and shifting.

[redpoint5]

The various ways to do suspension and where to put motors have already been played out, and the better ideas selected.

I think about how to provide a 1G environment for sojourners on a long mission to other planets. Seems to me inflatable habs are the way to go, especially when they're going to be pressurized anyhow.

[freebeard]

The various ways to do suspension and where to put motors have already been played out, and the better ideas selected.

I liked the Edison2 inwheel suspension, but it hasn't prevailed


https://www.carbodydesign.com/media/...03-720x482.jpg

I think about how to provide a 1G environment for sojourners on a long mission to other planets. Seems to me inflatable habs are the way to go, especially when they're going to be pressurized anyhow.

In case you don't remember the Inflatocookbook, here's their [side-scrolling] website: Inflatocookbook

What do you think of Think Orbital? ThinkOrbital - We build space

Space infrastructure company HQ to be setup in Colorado

Domes in spaaaace!

[Logic]

The suspension's in the 'spokes' here:

https://www.youtube.com/watch?v=qxKJu_-0rUA

Except it's not; it's just a digital design at this point.
How would one control the variation in the speeds of each motor to make this work..?
Then how much energy would go into keeping the car suspended..?
Regen??

Another problem is that one long motor is way more efficient than 3 short ones.
(copper fill and all that)

But ye; if one can get suspension into the 'spokes' it'd be a great step forward for electric motoring.

[Logic]

Originally Posted by freebeard

Maybe no-one else thinks about this but I do.

Today I wonder about inwheel suspension and an unsprung hub motor.

The innovation here is putting a twospeed transmission inside the motor rotor. Else the motor would have to be twice as heavy. On the downside it does require an hydraulic system for cooling, lube and shifting.

IIRC there's a 2 speed hub motor on Endless Sphere that works by reversing the motor direction for the 2nd gear.
A Xongda? IIRC.

Edit: Found it
https://endless-sphere.com/sphere/th...d-motor.59369/

[Logic]

Originally Posted by freebeard

I liked the Edison2 inwheel suspension, but it hasn't prevailed


https://www.carbodydesign.com/media/...03-720x482.jpg

Thx for that freebeard. I was unaware of the Edison 2.
I'm looking for info on the suspension now.

[freebeard]

They apply power to the spokes, but only for vertical suspension. It would also work at 90 degrees. If the axle moved forward, the vehicle would think it's rolling downhill. Or not.

Edit:
en.wikipedia.org/wiki/The_Very_Light_Car

The design emphasizes mainstream rather than exotic materials, extreme low weight (less than 450 kg (1000 lbs)) and very low aerodynamic drag (coefficient of drag <0.16).[4] Significant design innovations include in-wheel suspension and safety design derived from endurance auto racing.[5]
....
Edison2 was founded by Oliver Kuttner, a Virginia entrepreneur and auto enthusiast, and is headquartered in Lynchburg, Virginia.

I think Oliver Kuttner is an interesting person. His attitude about safety was "We know a lot about high-speed collisions" After Edison2 he went into real estate.

I thought Edison2 should've put their inwheel suspension on a 1937 Ford (one-year-only) tube axle and taken them to SEMA for street rodders.

[redpoint5]

Originally Posted by freebeard

What do you think of Think Orbital? ThinkOrbital - We build space

Domes in spaaaace!

I prefer inflatable habs. Eventually a taurus inflatable.

https://www.youtube.com/shorts/UkNI_OYMXrI