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Essay On Induced Emf

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Contents Introduction 2 Aims and Objectives 2 Generator design 3 1) Explain briefly how the circular motion of a rotor with permanent magnets generates an induced EMF in a stator winding and how it generates voltage during rotation 4 2) Use a time-dependent 2D study by COMSOL Multiphysics in order to model a generator. 5 3) Sketch the distribution of magnetic flux density at t = 0.0, 0.05, 0.1, 0.15, 0.20 and 0.25 7 4) Sketch the contours of magnetic vector potential on the same graph at t = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.25 11 4) Sketch the distribution of energy density at t = 0.0, 0.05, 0.1, 0.15, 0.20 and 0.25. Which part contains higher concentration of energy? 15 15 5) Sketch the graph of induced EMF for rotor speed of 1rpm 20 6) What is the peak and RMS value of the induced EMF 21 7) Induced EMF at 2rpm 22 Results: 23 References: 24 Appendix 25 A) Contours at t= 0.0, 0.05, 0.1, 0.15, 0.20, and 0.25: 25 B) contour magnetic potential at 0.2s 28 Introduction The main aim if this report is the investigation of a permanent magnet AC generator. It is required to construct the generator in COMSOL Multiphysics and understand the generator’s working. The report will also give an understanding of the working of a permanent magnet rotor that generates an induced EMF in stator winding and how it generates voltage during rotation. The data concluded in this report is all collected by using a time dependent 2D study by COMSOL Multiphysics and is to be used to understand

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