Abstract
A new method which is called the “finite element method with size modification” has been developed. This method has the following advantages:
(a) When the flux densities at some points are specified, the sizes of magnets which produce such flux densities can be directly calculated.
(b) As this method needs no repetition, computing time can be considerably reduced.
This new method has been applied to the design of the magnet roll for a cooying machine and an erasing head, etc., and its usefulness is clarified.
The method enables us to design the most suitable magnetic circuit which is composed of many magnets.
