This document appears to be a seminar presentation on magnetic spinning systems as an alternative to traditional ring spinning. Some key points: - It introduces the typical components and geometry of magnetic spinning systems, including electromagnets arranged around a magnetically levitated rotor. - It discusses advantages like very high spinning speeds enabled by the magnetic system with much lower friction/wear than traditional ring spinning. - The control system for positioning the magnetic rotor is described as using sensors, digital signal processing, and power amplifiers to manipulate the magnetic field. - In closing, it acknowledges those who supported and provided guidance for the seminar presentation.

1. A
SEMINAR
ON
Submitted to
FACULTY OF ENGINEERING & TECHNOLOGY
RAJASTHAN TECHNICAL UNIVERSITY, KOTA
for
The Partial Fulfillment of the Requirements for Degree of Master of Technology
in
Textile Technology
By:
VIJAY BABU GAUR
M.L.V. TEXTILE & ENGG. COLLEGE BHILWARA (RAJASTHAN)
(An Engineering College of the Rajasthan Govt.)
20015-16

2. CONTENTS:
INTRODUCTION
YARN TENSION IN MAGNETIC
SPINNING
TYPICAL MAGNETIC SYSTEM
GEOMETRY
CONTROL SYSTEM OF MSS
ADVANTAGES OF MAGNETIC SPINNING
REFERENCES

3. INTRODUCTION:
THERE ARE FOUR TYPES OF SPINNING SYSTEM
ARE COMMERCIALLY USED . THESE ARE:
1. TRADITIONAL RING SPINNING
2. ROTOR SPINNING
3. AIR-JET SPINNING
4. FRICTION SPINNING
AMONG THESE TYPES
OF SPG. SYSTEMS RING SPG. STANDS ALONG
AS REFERENCE TO HIGH QUALITY YARN
SUITABLE FOR ANY TYPE OF TEXTILE END
PRODUCT.

4. CONT.
BUT THE TECHNOLOGICAL LIMITATIONS OF RING SPINNING
IS:
1. THE DEPENDENE OF THE YARN LINEAR
SPEED (DELIVERY SPEED)ON THE
ROTATIONAL SPEED OF THE TRAVELLER.
2. THE CONTINUES NEED TO STABILIZE YARN
TENSION DURING SPG & THE DEPENDENCE
OF THIS STABILITY ON THE TRAVELLER
SPEED.
3. THE IMPACT OF TRAVELLER SPEED ON
FIBRE BEHAVIOUR IN SPG.TRIANGLE.

5. CONT.
OUR APPROACHIS TO REPLACE THE
TRAVELLER WITH A MAGNETICALLY
SUSPENDEDLIGHT WEIGHT ANNULAR
DISC WHICH IS ROTATESIN A
CAREFULLY PREDEFINEDMAGNETIC
FIELD. THIS WILL RESULT IN A SUPER
HIGH SPG. ROTATION THAT IS ROBUST
AGAINST ALL THE CURRENT
TRAVELLER SYSTEM. THE IDEA HERE IS
TO CREATE A NON-TOUCHING
ENVIRONMENTOF THE ROTATING
ELEMENT OF SPG. SYSTEM.

7. YARN TENSION IN MAGNETIC
SPG.:
CONVENTIONALRING SPG. SYSTEM (CRSS)
INVOLVES YARN MOVEMENT FROM
DELIVERY ROLLERS OF THE DRAWING
DEVICE TO THE WINDING POINT OVER
A COMPLEX PATH. FRICTIONAL FORCES
ARE GENERATED ON THE CONTACTED
PARTS OF THE SYSTEM. THESE FORCE
ARE FOUND B/W YARN & GUIDE, YARN
& CONTROL RING, YARN & TRAVELLER
AND TRAVELLER& RING.

8. CONT.
IN THE MAGNETIC SPG. SYSTEM(MSS)THE YARN PATH IS
DIVIDED FROM THE FRONT ROLLER TO BOBBIN IN TO
FOUR REGIONS. THE MSS INCLUDES THE SAME REGIONS
ANALYSED IN RING SPG. BUT ONLY REGION (iii) WILL
HAVE A DIFFERENT ANALYSIS DUE TO THE ABSENCE OF
THE TRAVELLER & RING CONFIGURATION.

9. TYPICAL MAGNETIC SYSTEM
GEOMETRY:
TYPICAL MAGNETIC SYSTEM IS COMPOSED OF
FOUR HORSESHOE-SHAPED
ELECTROMAGNETS. THE FOUR MAGNETS ARE
ARRANGED EVENLY AROUND A ROTOR THAT
IS TO BE LAVITATED. EACH OF THE
ELECTROMAGNET CAN ONLY PRODUCE A
FORCE THAT ATTRACTS THE ROTOR TO IT . THE
FOUR ELECTROMAGNETS MUST ACT IN
CONCERT TO PRODUCED A FORCE OF
ARBITRARY MAGNITUDE AND DIRECTION ON
THE ROTOR .

10. THE COILS MAY BE ARRANGED IN THE SAME PLANE OR NORMAL PLANE OF
THE ROTOR.

13. CONTROL SYSTEM OF MSS:
THE CONTROL SYSTEM CONSISTS OF THE
CONTROLLER,POWER AMPLIFIERS
AND A POWER SUPPLY. ADDITIONAL
CIRCUIT IS PRESENT FOR
CONDITIONINGOF THE SIGNALS FROM
THE POSTION SENSORS AND
CONVERSION OF THE DIGITAL OUTPUTS
FROM THE CONTROLLERTO THE
ANALOG AMPLIFIERS. CONTROL
SYSTEMS CAN BE OF THE ANALOG OR
DIGITAL TYPE.

14. CONT.
BUT THE DIGITAL CONTROL SYSTEMS
TAKE ADVANTAGEOF DIGITAL SIGNAL
PROCESSINGANDPERMIT MORE TYPES
OF ALOFGRITHMS& RESULTS TO BE
ACHIEVED. TYPICAL SUB-SYSTEMSIN
MAGNETICALLY SUSPENDEDDISC
CONTROL INCLUDE POSITION SIGNAL
PROCESSING, DIGITAL SIGNAL
PROCESSING, D/A CONVERSION POWER
AMPLIFIERS AND POWER SUPPLY .

16. ADVANTAGES OF MAGNETIC
SPG.:
1. MAGNETICSPG. FUNCTION WITH OUT
TRAVELLER SLIDING OVER THE
RING, SO THEREIS NO MECHANICAL
WEAR OR HEAT GENERATION.
2. HIGH SPEEDS OF THE ROTATING
MAGNETICALLY SUSPENDED DISC
ARE ATTENDABLE.(DEPENDSON
SPINDLE ROTATION SPEED )
3. FRICTION LOSES ARE MANY TIME
LESS THAN CRSS AND RESULT IN
LOWER OPERATING COST.

17. CONT.
4. MAINTENANCE COSTS ARE LOW DUE TO
THE ABSENCE OF MECHANICAL WEAR.
5. YARN TENSION COULD BE MEASURED
BY MEASURING THE MAGNETIC FIELD
STRENGTH REQUIRE TO MAINTAIN THE
DISC CENTERED.
6. MAGNETIC SPG. OVERCOME ALMOST ALL
THE DEFECTS CAUSED BY THE RING
TRAVELLER SYSTEM WHICH ARE:

18. CONT.
A- RING TOO LARGE
FOR BOBBIN
STRETCHEDANDWEAK
YARN, EXCESSIVE WEAR OF TRAVELLERS.
B- TRAVELLER TOO
LIGHT
YARN FRAYED BY WHIPPING AGAINST
SEPARATORS,SLACK TWIST IN YARN, SOFT
BOBBINS, ACCOUNT TOO LITTLE TENSION
OF THE LIGHT TRAVELLERS.
C- TRAVELLER TOO
HEAVY
STRETCHED & WEAK YARN, ENDS DOWN,
EXCESSIVE WEAR OF RINGS, CHAFED
YARN.
D- WORN
TRAVELLERS
ENDS DOWN, CHAFED & WEAK YARN.

19. ACKNOWLEDGEMENT:
 I WOULD LIKE TO THANKSALL THE
FACULTY MENBERS FOR THERE
WONDERFULGUIDANCE AND SUPPORT
THAT I CAPABLE TO DO THIS SEMINAR.
 I ALSO WANTSTO MAKE A VERY
GREATFULTHANKSTO ALL MY
CLASSMATES BEING PRESENT AT HERE
TO LISTEN MY SEMINAR CAREFULLY
AND ALL THE PEOPLE WHO SUPPORT
ME DIRECTLY & INDIRECTLY .

20. REFERENCES:
1. WWW.ENG-AUBURN.EDU
2. DAVID C. MEEKER 3RD INTERNATIONAL SYMPOSIUM ON MAGNETIC
SUSPENSION TECH., TALLAHASSEE,FL, DECEMBER,1995.
3. A.CHRARA, B. CARON, LAMII, PROCEEDING OF THE THIRD INTERNATIONAL
SYMPOSIUMON MAGNETIC BEARINS, JULY 1992.