advertisement

UNIVERSITY OF PLYMOUTH MODULE RECORD Module Code: ECAL122 Credits: 10 Level : 1 Module Title : ELECTRICAL PRINCIPLES I Pre-Requisites : Co - Requisites : If Linked, Module linked to : Short Module Descriptor - (Maximum four lines 9pt print): This module gives an introduction to units and dimensional analysis, the electrical properties of materials, dc & ac signals, electrostatics and capacitance, electromagnetism and Inductance, basic circuit principles and their application in dc and ac circuit analysis. Elements of Assessment COURSEWORK 100% Module Aims : EXAMINATION To provide a foundation of core knowledge in electrical engineering principles and practice in problem solving. Skills Elements : 1(b), 4, 6 Objectives / Learning Outcomes : The expected learning outcome is that the students will be able to: Analyse engineering equations using Dimensional Analysis Define and interpret fundamental dc and ac signal parameters List the electrical properties of materials and explain their relevance to component and circuit operation Identify and explain basic electromagnetic & electrostatic quantities and their relevance to passive components. Explain the purpose of inductors, capacitors and resistors in electrical circuits Apply knowledge of circuit theorems to calculate currents, voltages and power dissipation in simple circuits. Solve basic problems in passive dc circuits for step transient and steady state conditions. Solve basic problems in passive ac circuits using phasor diagrams and complex notation. Indicative Syllabus Content : Units Materials & components DC & ac signal quantities Circuit theorems & application in simple circuits Electrostatics, capacitance and transients in R-C circuits Electromagnetism, inductance and transients in R-L circuits AC circuits & phasors VALIDATION-: Feb 01 DATE OF IMPLEMENTATION : Sep 01 FACULTY:TECHNOLOGY FOR OFFICE USE ASC: ECAL113 DEPT: DCEE MODULE LEADER: FEEBAND: PARTNER INSTITUTION: Dr G Pan SUBJECT GP: TERM: Autumn RESOURCE UNITS: Lecture Schedule 1. Fundamental Units and Dimensional Analysis. Direct Current Electrical Circuits 2. Ohm's Law. E.M.F. and Potential Difference. Potentiometer. Conductors, semiconductors and Insulators. Resistance and Conductance in series and parallel. 3. Material Properties; resistivity, conductivity, permittivity, permeability. Relationships J = σE, B= µH, D = εE. Temperature variation. 4. Kirchhoff s laws. Examples in simple d.c. circuits. Mesh and Node Analysis. 5. Superposition Theorem. Thevenins Theorem. Examples - e.g. simple bridge circuits. Capacitance 6. Unit of Charge. Electric Flux Density. Electric Field Strength. Permittivity. Potential Difference. Electrostatic Flux. The parallel plate capacitor. 7. Capacitors in series and parallel. 8. Charge and discharge of capacitors. Theoretical derivations. Inductance 9. E.M.F. of self inductance. Definition of the Unit of Inductance. Inductance of a coil wound on a magnetic circuit. Permeability and magnetisation. 10. Self and Mutual Inductance. Coils in series and parallel. Coupling Factor. 11. Growth and decay of current in inductive circuits. Theoretical derivations. Alternating Current Circuits 12. Definition of an a.c. quantity. Examples of alternating and non-alternating waveforms. Average and r.m.s. value of a waveform. R.M.S. value of a sine wave. Form factor. 13. Phasor representation of a sinusoidal quantity. Phase relationship Phasor diagrams for addition and subtraction of voltages and currents. 14. Voltage, current and power in resistive circuits. 15. Voltage, current and power in purely inductive circuits. Phase shift. Inductive Reactance. Variation with frequency. 16. Voltage, current and power in purely capacitive circuits. Phase shift. Capacitive Reactance. Variation with frequency. 17. Complex notation. The 'j' operator. L-R series circuit. summation. Useful and Reactive Power. 18. General single phase ac. series circuit. diagram C-R series circuit. Complex impedance and impedance Voltage and current relationships. Power dissipated. Power factor. Phasor 19. Series resonance. Phasor diagrams at resonance. Effect of frequency variation. Q-factor. 20. Parallel resonance. Phasor diagrams. Resonant frequency. Power factor correction. ECAL113