Understanding Universal Motors in Power Tools: 2 Pole vs. 4 Pole Explanation

[K S Somanadha Sastry]

Hi i recently completed my mechanical engineering and was interested in studying how power tools work! when i did some survey i came to know that they work on the basis of universal motor usually. So now the question rises whether it is a 2 pole or a 4 pole? what will happen if its is 2 pole and what will if it is a 4 pole? can anyone help me in giving answer oriented to application(power tool)
Thanks

 

[scottdave]

In general, more poles will result in higher available torque. There is less angular distance between one magnetic peak, and the next. You may be interested in this article . http://www.shelleys.demon.co.uk/fjun04va.htm