Those lil DC motors use a permanent magnet as the Field which has a fixed magnetic North/South Polarity,,,,,,,,,therefore when you reverse the electrical polarity in the armature its resultant generated North South magnetic polarity changes so the magnetic forces turn it the opposite direction....
If you use electric current to create the magnetic field by its turns around a soft iron core, its resulatant North/South magnetic polarity is of one orientation depending on direction of current flow and likewise in the armature and it turns one particualr way buttttttttttttttttt even if you swap polarIty it (CURRENT FLOW) changes in BOTH Armature and Filed so they do not change RELATIVE TO EACH OTHER so it still turns same way. To reverse it you have to swap winding ends so flow is changed in only ONE and then it will indeed reverse
Hope that helps a little, and before someone wants to jump all over this brief explanation, remember I cant put perfectly accurate in a paragraph what it can take a book to fill lol so there
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
... [Read Article]
Latest Ad:
1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
[More Ads]
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.
