|
Permanent magnets are among the most useful components of our
technological age. They provide a constant, reliable source of energy
for many magnetic circuits without the need for external electric
currents.
Advances in metallurgy and magnetic technology in
the last two decades have resulted in the availability of magnetic
materials with unprecedented power - most notably the group of "Rare
Earth" magnets.
These breakthroughs in magnetic material
developments have been virtually unnoticed by the wider public as the
general thrust of the use of these new materials was directed towards
modification of existing products by replacing magnetic materials with
superior rare earth magnets performing the same task only with reduced
size.
Radical new products and markets have not emerged
because of the major drawback of permanent magnets: Their energy output
is fixed and therefore they cannot be employed if a variation in the
magnetic field strength is required.
Previous attempts to
overcome this shortcoming resulted in bulky, complicated to manufacture
or uneconomical designs. The use of switchable permanent magnets was
limited to very special applications. They were unsuitable for general
purposes and therefore never attracted major public attention.
Until
now it was easier and far more economical to control magnetic fields by
using electromagnets. The major problem with all electrical systems is
the need for a constantly available source of electric power, adding to
complexity, plus the intrinsic safety hazards of electricity.
The
Magswitch design affords the ability to manufacture a low cost,
switchable permanent magnetic device, which provides a useful base
component individually, as well as for integration in many
applications, hitherto reserved to electric, hydraulic, pneumatic or
other means of operation. Due to its unique design the Magswitch can
hold in excess of 250 times its own weight. One typical version weighs
less than 200 grams but can hold over 50 kilograms. Different sizes and
versions are available to suit particular applications.
The
intrinsic safety and independence from any external power source of the
Magswitch allows in many cases to replace existing electromagnets in
accordance with the need to develop ecological sustainability and
improved performance.
A myriad of new products and
applications will be found in all aspects of civilized life - Magswitch
has uses everywhere: from the kitchen to aerospace - the potential is
unlimited.
|