07-14-2014, 09:42 AM | #21 | |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Re: Motor-in-wheel Crawler? Quote:
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07-14-2014, 10:06 AM | #22 |
R.I.P. Chip Join Date: Jan 2004 Location: The Crawler State
Posts: 13,938
| Re: Motor-in-wheel Crawler? |
07-14-2014, 10:33 AM | #23 | |
Quarry Creeper Join Date: May 2009 Location: India
Posts: 365
| Re: Motor-in-wheel Crawler? Quote:
Hydraulic system can be made lite in weight.Steel is a strong material and through CAE analysis an efficient design can be built from scratch. There are many ways in which weight can be reduced and strength maintained. And there are many ways in which materials can be formed into a matrix. The hydraulic control system in fact could be the lightest control system that comes to my mind. Have you seen micro solenoid coils by the Lee company? Micro Solenoids can act as servos if necessary, meaning their position of actuation can also be controlled and they can actuate the valves. I feel the size and weight of the hydraulic distributor box would be within limit. Larger battery would not be needed because this hydraulic system will work as a positive displacement system. Certain number of brushless motor revolutions will be proportional to certain number of wheel rotation. This system would have to be efficiently designed in order to save battery weight. How much power do you think, would be needed by a single wheel in comp crawling? | |
07-14-2014, 10:37 AM | #24 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Re: Motor-in-wheel Crawler?
The power needed for one wheel is really the same as the entire vehicle. If you get bound down, you need full torque at the stuck wheel. In this way a hydraulic system could shine with a single larger motor powering everything.
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07-14-2014, 10:52 AM | #25 |
Quarry Creeper Join Date: May 2009 Location: India
Posts: 365
| Re: Motor-in-wheel Crawler?
A single large motor concept would also need an accumulator tank and that will increase weight + the hydraulic lines traveling down to each wheel. I was thinking more about 4 individual brushless motors in each wheel and each of them having their own closed loop hydraulic system. The only connecting wires would be the ones that go to the motor and the ones that control the solenoids.
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06-05-2015, 05:08 PM | #26 |
Newbie Join Date: Oct 2012 Location: UK
Posts: 44
| Re: Motor-in-wheel Crawler?
...bit of a cheeky dredge up from the depths, but it seems progress has been made in this direction! https://www.youtube.com/watch?v=8HPGaEMNsY8 |
06-06-2015, 08:08 PM | #27 |
RCC Addict Join Date: Aug 2007 Location: Seattle
Posts: 1,765
| Re: Motor-in-wheel Crawler?
Hole E Chit!!!!
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