The shapes and magnetization directions of your magnets will determine the design of your alternator or generator. The reason for this is that the greatest concentration of magnetic flux will be located at the poles of the magnets. You need to know the magnetization direction of you magnet to know the location of the poles. Two magnets may look the same but if their magnetization directions are different then they are totally different magnets. The magnetization direction of a magnet will be greatly determined by it shape. Below are examples of the most common shapes and their possible magnetization directions.
The permanent Magnet
Magnets come in all types of shapes, sizes, and Magnetization Direction. We will be dealing with the most common shapes and Magnetization Directions, the size usually has to do with strength. When we refer to the Magnetization Directions we are referring to what part of the magnet shape the north and south poles are located, very important when attempting to generate electricity.
Our first shapes are the discs, cylinders, and rings.
Here are some photos of Neodymium magnets or rare earth magnet Discs from K&J Magnetics.
Here are some photos of Neodymium magnets or rare earth magnet Cylinders from K&J Magnetics
Here are some photos of Neodymium magnets or rare earth magnet Rings from K&J Magnetics
These magnets above commonly come in two types of Magnetization Directions.
The first is called axially where the poles are located on the flat sides.
The other is called diametrically where the poles are located on the round ends.
Next we have blocks.
Here are some photos of Neodymium magnets or rare earth magnet blocks from K&J Magnetics
Neodymium magnets or rare earth magnets commonly have what's called a thru thickness direction.
And last are spheres.
Here are some photos of permanent magnet spheres from K&J Magnetics
Spheres will have an axially Magnetization Direction
I use the TI-89 Graphing Calculator for all my calculations
which has symbolic manipulation ability.
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