Selecting a motor and reduction gear transmission

[SCTrojan09]

I need to select a 10hp electric motor and gearbox for a drivetrain powering a cart. The wheels need to turn at about 30 Rpm. I was looking at getting a motor such as this

http://www.automationdirect.com/adc...00HP)/Marathon_MicroMAX_(0.25HP_to_10HP)/Y996

It indicates that it has constant torque from 90-1800Rpm. I feel like this motor combined with a variable frequency AC drive and a gearbox with a 5:1 reduction ratio would work well.

The cart will only operate for a couple minutes at a time before stopping. Is there any problem with this setup? Also, I am having trouble finding gearboxes meant to handle 10hp. Could anyone point me in the right direction to find one with a reduction ratio of at least 3:1 and with dual outputs?

Thanks

 

[SCTrojan09]

Please disregard this post. Noticed an error in my spreadsheet and have to recalculate my needs.

 

[tygerdawg]

A little hint for you: most gearmotor manufacturers have online gearmotor sizing applications of some sort to do this for you. SEW Eurodrive has one that is very spiffy.

TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering

http://www.bluetechnik.com

 

[DickDV]

I would suggest that you figure your geartrain ratio so, at maximum desired vehicle speed, the motor is at 80 to 90 hz. This way, the motor cooling is improved at all speeds, the starting torque is higher, and you reach maximum hp somewhere around 2/3 of maximum speed rather than only at full speed.

A squirrel cage AC induction motor loves to be run that way and will thank you for it.