Selecting motor and gearbox

[alibabaaaa]

I need to review some criteria for design of electrically-driven machines, especially for proper selection of electric motors and gearboxes.
I know some of this stuff from an university course that I took some years ago, in Italy. I have some resources in italian but now I would like to study from a textbook in english.
I searched very long without finding anything that fits. Is it possible that this topic is not covered in american/british engineering programs? It sounds very unlikely to me.
Could you please suggest a good textbook for mechanical or mechatronic engineering students about the design of electrically-driven machines? Thanks in advance!

 

[tygerdawg]

Other than the fundamental mechanics/dynamics of F=ma and T=Jα, textbooks probably won't be that useful for this application (IMHO). A useful summary I've recommended many times is The Smart Motion Cheat Sheet (websearch & find it somewhere).

Considering gearmotors, their task is to deliver a specified torque at a specified RPM. So your task is to calculate the maximum torque needed for your application. I suggest you find and study Engineering & Applications Guides from gearmotor manufacturers like SEW Eurodrive, Dodge, Nord, others. I recall that years ago SEW had a very detailed Engineering Guide used for sizing exercises for their gearmotors.

TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering

http://www.bluetechnik.com

 

[LangleyEng]

I'm not sure how much detail you want to go into for "selection of gearboxes", but "Shigley's mechanical engineering design" (10th ed, Budynas & Nisbett) has detailed chapters on gears and shafts. I found this very useful last year during a University project involving electric motors + gearboxes.

With regards to electric motor selection - I didn't find anything with detailed guidance for selection, but "Mechatronics" (6th ed, Bolton) was useful for understanding how each type works and some factors affecting selection.

 

[Sparweb]

For the motors part, you could consider "Electric Motors and Drives" by Austin Hughes.
I second the vote for Shigley's book for the mechanics.

STF

 

[GregLocock]

"If it isn't in Shigley it isn't worth knowing" as young Phil said to me.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[alibabaaaa]

Thanks for your valuable suggestions. I will read the references you recommended.
I also searched a little further by my own and I found "Mechatronics with experiments" by S. Cetinkunt. Section 3.6 is titled "Actuator sizing" and it seems ok, but I haven't read it carefully, yet.

 

[drawoh]

alibabaaaa,

What is it you are trying to figure out? The mechanics of machines needed to understand gearboxes is not very complicated. An off the shelf gearbox is a black box, with gear ratio, efficiency, maximum speed, maximum, torque, mounting holes, and input and output shafts or connections. You should not really care what is inside.

--
JHG

 

[chicopee]

The horsepower of a gearbox has to match or exceed that of its drive motor.

 

[tbuelna]

If you have a good understanding of the operating conditions for the machine being driven by the motor/gearbox, you can find a method for sizing the motor/gearbox on the website of most any commercial motor/gearbox manufacturer. Of course these OEM sizing methods will typically give a very conservative (but sensible) result, which you may not like.

 

[drawoh]

The horsepower of a gearbox has to match or exceed that of its drive motor.

And the torque capacity must exceed anything that can be applied externally.

--
JHG