|
Tractor Talk Discussion Board |
Re: PTO HP verses electric motor HP
[ Expand ] [ View Follow Ups ] [ Post Followup ] [ Return to Forum ]
Posted by Bob M on February 25, 2004 at 19:29:39 from (66.67.9.170):
In Reply to: PTO HP verses electric motor HP posted by Grant on February 25, 2004 at 18:33:32:
From a strict engineering standpoint, horsepower is work divided by time. Where horsepower comes from doesn't matter - can be a tractor PTO, electric motor....or a horse. A horsepower is a horsepower. However in the real world, for a tractor PTO it's good practice to limit the shaft load to about 85% of the tractor's max horsepower. This leaves a reserve to pull through brief overloads, etc. So a 60 HP tractor should be capable of about 51 HP continuous on the shaft. On the other hand an electric motor is fine for power output up to 100% of it's nameplate rating. And most industrial motors can be run safely at 115% or more of rating. So a 60 HP motor may safely pull 69 HP on a continuous basis - 18 HP more than the "same" 60 HP tractor PTO. In addition, electric motors have enormous torque reserve capacity - as much as 5 times the normal running torque. That means a 60 HP electric motor will easily pull through an overload that would instantly stall a 60 HP tractor PTO. Now I don't know the answer to your specific question. But at least you can see how an electric motor can far outperform a tractor PTO of the same rated HP.
Follow Ups:
Home
| Forums
Today's Featured Article -
Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V. Yesterday's Tractors - Antique Tractor HeadquartersWebsite Accessibility Policy |
|
