Magnetic Elements and Magnetic Measurements

Lecturer:

Tutor:

Supervisor:

Department of Measurement

Synopsis:

Measurement of magnetic field, geomagnetism, NMR. Typical soft and hard magnetic materials. Measurement of properties of soft and hard magnetic materials. DC and AC magnetised circuits, circuits with permanent magnet. Current and voltage instrument transformers, current comparators. Sources of magnetic field. Magnetic shielding.

Requirements:

Syllabus of lectures:

1. Magnetism - quantities, units, rules

2. Measurement of magnetic field in air

3. Ferromagnetic materials - sorts, properties, modes of magnetising

4. Ferrite magnetic elements - properties, applications

5. Measurement of soft magnetic material at DC magnetising

6. Measurement of soft magnetic material at AC magnetising

7. Measurement of hard magnetic material

8. Measurement of other magnetic parameters

9. Design of small mains and pulse transformers

10. Instrument transformers, current probes and comparators

11. Magnetic circuits with permanent magnet

12. Magnetic actuators - electromagnets, relays , stepper motors

13. Magnetic circuits of sensors of non-electrical quantities

14. Standards of magnetic quantities, magnetic shielding

Syllabus of tutorials:

1. Introduction

2. Measurement of shielding factor in DC magnetic field

3. Measurement of shielding factor in AC magnetic field

4. Measurement of Curie temperature

5. Determination of parameters of hard magnetic materials

6. Determination and extending of frequency range of induction coils

7. Measuring system for hard magnetic material

8. Measurement of complex permeability

9. Measurement of dynamic hysteresis loop

10. Calculation and measurement of leakage factor

11. Foerster - type coercimeter

12. Calibration of electronic fluxmeters

13. Fluxgate sensor

14. Discussion of results, assessments

Study Objective:

Study materials:

1. Ripka, P. et al.: Magnetic Sensors and Magnetometers. Artech House, Boston-London 2001, ISBN 1-58053-057-5

2. Jiles, D.: Magnetism and Magnetic Materials. London: Chapman & Hall, 1996

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Cybernetics and Measurements - Control Engineering- structured studies (compulsory elective course)
• Cybernetics and Measurements - Artificial Intelligence- structured studies (compulsory elective course)
• Cybernetics and Measurements - Measurement and Instrumentation Systems- structured studies (compulsory elective course)
• Cybernetics and Measurements - Aeronautical Engineering and Control Systems- structured studies (compulsory elective course)