Electromagnetic Fields

EEEN20121  Electromagnetic Fields 10 Semester 1 Undergraduate Level 2 Zhirun Hu Unit coordinator Department of Electrical & Electronic Engineering 1 FHEQ level (Framework for Higher Education Qualifications) ' Middle part of Bachelors ' European Credit Transfer & Accumulation System Rating : 5.0 This unit will cover the following:<ul><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Physical concept of electric current. Current density. Conductors, semiconductors, and superconductors. Voltage sources. Electric field inside a current-carrying conductor. Ohm’s law and resistance. Resistivity and conductivity. Ohm’s law in microscopic terms. Power loss and loss density. Fuses. Current flow in massive conductors. Kirchhoff’s nodal law. Lightning.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Electric charge. Coulomb’s Law. Principal of superposition. Electric field. Field lines as lines of force. Motion of a charged particle in an electric field. Gauss’ Law in free space. Symmetrical distributions (points, spheres, lines, planes). Work done in moving a charge. Electric potential. Equipotentials and field lines. Superposition of potentials.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Conductors in static electric fields. Dielectrics and polarisation. Breakdown of dielectric materials. Flux density. Generalisation of Gauss’ Law. Boundary conditions.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">General concept of capacitance. Calculation of capacitance for simple geometries (planes, concentric cylinders, concentric spheres). Capacitors as energy stores.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Relativistic origins of magnetic field (as background only) Lorenz force. Magnetic force on a moving charge. Magnetic flux density. Motion of a charge in a magnetic field. Force on a current-carrying conductor. Force on a current-carrying circular loop.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Magnetic materials. Ferromagnetism. Hysteresis loops. Hard and soft magnetic materials. Permanent magnet materials.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Electric current as the source of the magnetic field. Biot-Savart Law. Field produced by a straight-line filament. Ampere’s Law in air. Force between two current-carrying conductors.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Simple magnetic circuits, such as C-cores. Load-line constructions to allow for saturation. Load-line calculations with permanent magnet devices.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Magnetic flux and flux linkages. Faraday’s law. Lenz’s Law. Flux linking rule and flux cutting rule. Rotating coil in stationary magnetic field. Fundamentals of transformer action. Eddy currents in massive conductors - the need for lamination.</li><li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;">Self- and mutual inductance. Energy stored in a magnetic field in terms of inductance. </li><li>Calculation of inductance from stored energy. Force and torque in terms of changing inductance.<o:p></o:p></li></ul> <o:p></o:p> <p class="MsoNormal" style="-webkit-text-stroke-width:0px;background-color:rgb(255, 255, 255);color:rgb(81, 81, 81);font-family:Arial, sans-serif;font-size:12px;font-style:normal;font-variant-caps:normal;font-variant-ligatures:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:-webkit-left;text-decoration-color:initial;text-decoration-style:initial;text-decoration-thickness:initial;text-indent:0px;text-transform:none;white-space:normal;widows:2;word-spacing:0px;">This unit will cover the following:<ul><li class="MsoListParagraph">Physical concept of electric current. Current density. Conductors, semiconductors, and superconductors. Voltage sources. Electric field inside a current-carrying conductor. Ohm’s law and resistance. Resistivity and conductivity. Ohm’s law in microscopic terms. Power loss and loss density. Fuses. Current flow in massive conductors. Kirchhoff’s nodal law. Lightning.</li><li class="MsoListParagraph">Electric charge. Coulomb’s Law. Principal of superposition. Electric field. Field lines as lines of force. Motion of a charged particle in an electric field. Gauss’ Law in free space. Symmetrical distributions (points, spheres, lines, planes). Work done in moving a charge. Electric potential. Equipotentials and field lines. Superposition of potentials.</li><li class="MsoListParagraph">Conductors in static electric fields. Dielectrics and polarisation. Breakdown of dielectric materials. Flux density. Generalisation of Gauss’ Law. Boundary conditions.</li><li class="MsoListParagraph">General concept of capacitance. Calculation of capacitance for simple geometries (planes, concentric cylinders, concentric spheres). Capacitors as energy stores.</li><li class="MsoListParagraph">Relativistic origins of magnetic field (as background only) Lorenz force. Magnetic force on a moving charge. Magnetic flux density. Motion of a charge in a magnetic field. Force on a current-carrying conductor. Force on a current-carrying circular loop.</li><li class="MsoListParagraph">Magnetic materials. Ferromagnetism. Hysteresis loops. Hard and soft magnetic materials. Permanent magnet materials.</li><li class="MsoListParagraph">Electric current as the source of the magnetic field. Biot-Savart Law. Field produced by a straight-line filament. Ampere’s Law in air. Force between two current-carrying conductors.</li><li class="MsoListParagraph">Simple magnetic circuits, such as C-cores. Load-line constructions to allow for saturation. Load-line calculations with permanent magnet devices.</li><li class="MsoListParagraph">Magnetic flux and flux linkages. Faraday’s law. Lenz’s Law. Flux linking rule and flux cutting rule. Rotating coil in stationary magnetic field. Fundamentals of transformer action. Eddy currents in massive conductors - the need for lamination.</li><li class="MsoListParagraph">Self- and mutual inductance. Energy stored in a magnetic field in terms of inductance. </li><li>Calculation of inductance from stored energy. Force and torque in terms of changing inductance.</li></ul> <ul><li>This unit aims to provide students with a fundamental understanding of electromagnetic fields and their interactions with materials, enabling them to apply field concepts to electrical engineering problems. It introduces the physical principles underlying electric and magnetic fields, including their sources and effects, as well as methods for calculating field distributions in simple geometries.</li><li>The unit also covers the behaviour of conductors, dielectrics, and magnetic materials, leading to a field-based interpretation of passive circuit components (resistors, inductors, and capacitors).</li><li>Additionally, students will develop skills in computational and experimental techniques for analysing electromagnetic phenomena.  </li></ul> On the successful completion of the course, students will be able to:  ILO 1    Describe the origins of electromagnetic fields in terms of their sources.ILO 2    Explain the reasons for the different electric and magnetic properties of materials, and how they are exploited.ILO 3    Express the passive components (R, L, C) in terms of lumped representation of distributed field quantities.ILO 4    Perform field calculations for simple geometries (points, lines, cylinders, planes, spheres).ILO 5    Calculate R, L, and C for simple geometries.ILO 6    Perform measurement of magnetic flux versus current characteristic of an iron-cored inductor.ILO 7    Show, by plotting, equipotentials for two simple geometries using a two-dimensional conducting analogue and a two-dimensional finite element software package.   0 Other 20% 1 Written exam 80% Coursework:Lab-based Coursework of 6 hours in dry lab 20% <o:p></o:p> Feedback provided via CANVAS three weeks after the submission deadline. MATH19611 Mathematics for EEE 1E1 Pre-Requisite Compulsory MATH19622 Mathematics for EEE 1E2 Pre-Requisite Compulsory BEng(Hons) Electrical and Elec BEng(Hons) Electrical and Elec Second Year Mandatory BEng(Hons) Electrical and Elec BEng(Hons) Electrical and Elec Second Year Mandatory BEng(Hons) Mechatronic Enginee BEng(Hons) Mechatronic Enginee Second Year Mandatory BEng(Hons) Mechatronic Enginee BEng(Hons) Mechatronic Enginee Second Year Mandatory MEng (Hons) Electrical and Ele MEng (Hons) Electrical and Ele Second Year Mandatory MEng (Hons) Electrical and Ele MEng (Hons) Electrical and Ele Second Year Mandatory MEng (Hons) Mechatronic Engine MEng (Hons) Mechatronic Engine Second Year Mandatory MEng (Hons) Mechatronic Engine MEng (Hons) Mechatronic Engine Second Year Mandatory N Carter, R.G. (1992). Electromagnetism for Electronic Engineers. 3rd edn. Chapman & Hall. ISBN: 0412427400.Duffin, W.J. (2001). Electricity and Magnetism. 4th edn. W.J. Duffin. ISBN: 0951043811.Purcell, E.M. and Morin, D.J. (2013). Electricity and Magnetism. 3rd edn. Cambridge University Press. ISBN: 9781107014022.Serway, R.A. and Jewett, J.W. (2019). Physics for Scientists and Engineers. 10th edn. Cengage. ISBN: 1337553271.   Lectures 18 Practical classes & workshops 6 Tutorials 4 0 72