Anyone do Robots?

I plan to build a robot-like wheelchair. I plan to use Briggs E-Teks and the New Roboteq 60V esc on either 48 or 60V. My real question is that the Etek motors are rated to run at up to 150amp@48V continous and the Roboteq esc runs at 140amps continous on each channel (dual channel esc), will this setup work? References: www.roboteq.com and www.robotmarketplace.com

[What's_nitro?]

Unless you plan on running the motors at their full rated load (~7200W) for more than a short burst of acceleration you should be fine with that setup. Honestly, dealing with currents that large, I don't think the controller would self-destruct if you accidentally put another 10A through it! Does the manufacturer specify burst and/or sustained ratings for the controller?

The surge rating is 500amp on the esc.

[trev3813]

Once ben gets on his computer he can talk to ya, his mmm took out his battery

[Takedown]

Im in "first" robotics for the first time this year because its the schools first year hosting it. Ive been in robotics programs before though such as "vex" and its very fun. It challenges your mechanical and electrical abilities to a very far extent.

As for the combo. Its not going to cut it if its maxing out the ESC like that if Im reading what you are saying correctly.

Well the esc says for sure that it will run 140amps continous. The motor says that it will run at up to 150amps@48v continous, the way i'm reading, that seems to be the top end of the continous rating for the motor. Wouldn't running it at 60v instead of 48v reduce the amps?

I found a performance chart for the Etek and the 150amp rating at 48v is full-tilt. The motor only draws about 75-80amps at peak efficency. The hp rating is 15horses at 150amps but the peak eff. is 8horses. Keep in mind its gonna be geared down via chain drive and it won't see large hill all that often.

Originally Posted by Takedown

Im in "first" robotics for the first time this year because its the schools first year hosting it. Ive been in robotics programs before though such as "vex" and its very fun. It challenges your mechanical and electrical abilities to a very far extent.

As for the combo. Its not going to cut it if its maxing out the ESC like that if Im reading what you are saying correctly.

HEY! welcome. Iv been apart of FIRST for 6 years. 2 as a student of team 1002 and 2 as mentor for team 2415. What is your team number?

[What's_nitro?]

Originally Posted by Fast5sRevo88

I found a performance chart for the Etek and the 150amp rating at 48v is full-tilt. The motor only draws about 75-80amps at peak efficency. The hp rating is 15horses at 150amps but the peak eff. is 8horses. Keep in mind its gonna be geared down via chain drive and it won't see large hill all that often.

Even then, it would need to be a very steep hill and you would need to be moving very fast up said hill to require all 15HP.

That's i'm saying, but i would want to be sure how compatible this setup is before spending all that money.

[What's_nitro?]

You could try sending an email to both manufacturers and see what they think. I think you'll be fine unless you decide to go for a speed record with it.

[brushlessboy16]

Originally Posted by What's_nitro?

You could try sending an email to both manufacturers and see what they think. I think you'll be fine unless you decide to go for a speed record with it.

But there is no fun in NOT trying


I too am in FIRST robotics, WOOHOOO team 87!!

good times..

Originally Posted by What's_nitro?

You could try sending an email to both manufacturers and see what they think. I think you'll be fine unless you decide to go for a speed record with it.

I think that would be the best idea, i'm actually going to use this for my offroad wheelchair which i will go hunting in, so i need it to be a dependable setup. When i start getting parts in and start building it, it will go up in the Project X forum.

[Takedown]

Im in team 2393....

Appleton which is 15miles north of here is team 91 so they've been in it for awhile like bens school. I wish I would have had this opportunity when I was a freshman.

Well i talked to Roboteq and they said the controller shouldn't have a problem handling the Etek motors as long as they don't stall. I don't know if i should chance it or not. As most people know, there is a chance of stalling something offroad. I have the option of using one motor and conventional kart steering, but i'm not sure i have the upper body strength. Any other ideas?