2. CONTENTS
O Automobile applications
1. Motor applications
2. Sensor applications
3. actuators
4. Instrumentation
5. Loud speakers
O Magnetic materials used for automobile applications
1. Sintered ferrites
2. Al-Ni-Co
3. Samarium cobalt
4. Neodymium Iron Boron alloy
O Future perspective
O conclusion
3. THE AVERAGE MODERN CAR CONTAINS UPWARDS OF 200
MAGNETS COVERING ALL ITS APPLICATIONS
4. INTRODUCTION
O The modern automotive market demands
an increasing sophistication in control and
comfort of its products.
O As a consequence, there has been a
significant increase in the complexity of
vehicle electrical control systems which
has risen the demand for powerful
automotive magnets
6. MOTOR APPLICATIONS
O Motors used in automobile are
1.Power steering motors
2.Starter motors
3.Alternators
4.Engine cooling fans
5.Windscreen wiper
6.Washer Pumps
7.Fuel pumps
11. MAGNETIC MATERIALS USED FOR
AUTOMOBILE APPLICATIONS
O The two materials historically used in Automotive
applications are Al-Ni-Co and Sintered Ferrite.
O Al-Ni-Co was traditionally used in sensing and
instrument applications.
O Sintered ferrites arcs are used in DC motors
O High strength materials such as Samarium Cobalt
alloys have been available for many years (high
price)
O The major development in the past few years has
been the availability of cheaper Neodymium Iron
Boron magnetic materials both sintered and
bonded types.
12. SINTERED FERRITES
O Low cost
O They are readily available in blocks, rings and discs.
O Principal applications are DC motors, loudspeakers,
reed switch operation, magnetic separator assemblies
and general holding devices such as pot magnets.
13. Al-Ni-Co
O Alnico is an alloy containing Aluminium (Al), Nickel
(Ni), Cobalt (Co) hence its name Alnico.
O Alnico magnets were developed in the 1930’s and
were the first “Real” performance permanent
magnets
O Alnico is produced by either a sintering method or,
more commonly, a casting method.
O There are 29 grades of Alnico
14. SAMARIUM COBALT
O Sintered Samarium Cobalt rare-earth (SmCo)
magnets are manufactured by using powder
metallurgy techniques
O The composition of this alloy is approximately
35% Samarium, 60% cobalt with the balance
being Fe & Cu.
O Being almost impossible to de-magnetize
SmCo magnets have a vast range of
applications ranging from servo- motors,
robotics, machine tools, to relays, sensors &
UHV magnetrons.
15. NEODYMIUM IRON BORON ALLOYS
O Neodymium Iron Boron magnets were
commercially introduced in the early
1980s. They are widely used today in
many different applications.
O Neodymium Iron Boron, NdFeB, mugnets
exist in a variety of grades. These grades
not only vary in magnetic output
performance but they also vary with
temperature rating.
16.
17. FUTURE PERSPECTIVE
O Future for magnetic materials for
Automotive applications shows great
potential, with considerable growth
forecast. The magnetic material industry
has to keep up with the Automotive
industry’s considerable technical demands
for the future with both new material and
applications.
18. CONCLUSION
O The automotive industry will continue to
demand new and better magnets for cars
capable of high performance under
difficult conditions. Therefore, the
continuous development of better ways to
supply high- performance magnets for the
automotive industry is imperative.
