bump for Ron's reference.
If one could take two outrunners back-two-back like
the airplane example, with the back motor driving the shaft
and the front motor driving the front bell....
The planetary gear will sum the torques supplied to
the sun and ring gears through the planet carrier.
The planet carrier becomes the output.
Then drive the sun gear with the shaft from the back motor and the ring gear
with the front motor bell.
You can have two throttles, one connected to each
motor. Then if you apply torque to say the front motor/ring gear,
then the planet carrier will be driven through the ring to carrier
reduction (if the sun is held). Vice versa...If you apply
torque through the sun gear, then the planet carrier
will be driven through the sun to carrier reduction (if the ring is held).
Now, supply torque to both and the planet carrier is driven by
both. A nice feature is that both inputs are reductions.
If you don't have some one way clutches, then the motor needs to be able
to provide stall torque continuously if *only* one motor is providing torque.
If both motors are providing torque, you may be able to
do away with the one ways entirely....
I'm not 100% clear on this yet...
I think a sophisticated controller with reverse capability can make this thing climb a mountain.
You can have extremely low ratios when you run one in reverse and the other forward,
and make the planet carrier creep along..
And you could run it in reverse....(eliminate the one way bearings though).
In the earlier post, I wanted matched torque inputs through gearing,
but, you might be able to match torques by selecting different motors..
i.e. 180kv for the large reduction and 130 kv for the small reduction.
There's nothing that says you have to match torques either...
I'm just square and symmetrical.
I'll post a pic when I get home tonight of the matex unit I have.
I'll need a higher torque unit when I pull this off. A design
is starting to solidify... I gotta finish the trike first.
Matex planetaries in a 75mm ring have a 12mm
splined input shaft.
Anyway, I going to pick up a small mill /lathe combination machine this weekend!!
I'll be able to do some lathe work and pull this off me thinks..
anyway, for other references, search for the Prius Hybrid synergy drive.
It's just a planetary with an extremely sophisticated controller, two motors, and an ICE.
It's a different layout, but similar in application. The motor/generator 2 is tied to the ring gear,
the ICE is tied to the planet carrier, and the motor/generator 1 is tied to the sun gear.
"If you don't follow your dreams, you might as well be a vegetable." Burt Munro
The reasonable man adapts himself to the world;
the unreasonable one persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man.
-- George Bernard Shaw