Register to reply

Permanent magnet motor working on repulsion force

by faisal5455
Tags: magnet, motor, permanent, repulsion, working
Share this thread:
faisal5455
#1
May18-14, 02:53 AM
P: 2
Sir what would be the life of permanent magnet motor which runs by the repulsion of north pols. Is magnets energy wasted during this repulsion process or not. Because it continuously work on repulsion of two north pols.
Phys.Org News Partner Physics news on Phys.org
Engineers develop new sensor to detect tiny individual nanoparticles
Tiny particles have big potential in debate over nuclear proliferation
Ray tracing and beyond
adjacent
#2
May18-14, 03:58 AM
PF Gold
adjacent's Avatar
P: 1,496
Can you draw a diagram to show what's in your mind?
Something like this?
Attached Thumbnails
hhhu.png  
faisal5455
#3
May18-14, 04:13 AM
P: 2

abitslow
#4
May18-14, 02:11 PM
P: 140
Permanent magnet motor working on repulsion force

Two (or more) North Poles will exert a repulsion on each other. This repulsive force can be converted into useful work. The amount of energy used to bring the two poles together will be MORE than the amount of work extracted from them. That is, you will be converting motion (generated externally) into heat. There is no such thing as a perpetual motion machine.
The diagram you added shows NO moving parts. If I assume that the two disks are spinning on the shaft, then the bearing surface will wear, but the amount of wear per revolution obviously depends on the materials of construction. The two disks will quickly stop, converting most of the energy you used to start them spinning into heat (friction) but some into electromagnetic waves.
To repeat the obvious, what ever energy you use to spin the disks will be only partially converted into movement of the shaft (if the shaft is also rotating). There is no such thing as a perpetual motion machine.
berkeman
#5
May18-14, 02:45 PM
Mentor
berkeman's Avatar
P: 41,109
Quote Quote by faisal5455 View Post
Sir what would be the life of permanent magnet motor which runs by the repulsion of north pols. Is magnets energy wasted during this repulsion process or not. Because it continuously work on repulsion of two north pols.
Welcome to the PF. We do not discuss perpetual motion machines (PMMs) or "free energy" here at the PF. That is in the Rules (see Site Info at the top of the page). Thread is locked.

Quote Quote by PF Forbidden Topics


Register to reply

Related Discussions
Linear permanent magnet motor design Electrical Engineering 1
3 Phase permanent magnet motor control Electrical Engineering 0
How to calculate the repulsion force between a permanent and an electromagnet? General Physics 0
Working model of a permanent magnet? Classical Physics 2
Permanent magnet dc motor reversal Engineering, Comp Sci, & Technology Homework 0