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InterviewSolution
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Mention the various energy losses in a transformer. |
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Answer» Solution :i. Core loss or Iron loss This loss takes place in transformer core. Hysteresis loss (REFER SECTION 3.6) and eddy current loss are known as core loss or Iron loss. When transformer core is magnetizedd and demagnetized REPEATEDLY by the alternating voltage appliedacross primary coil, hysteresis takes place due to which some energyis lost in the form ofheat. Hysteresis loss is minimized by using steel of high silicon content in making transformer core. Alternating magnetic flux the coreinduces eddy currents in it. Therefore there is energy loss due to the flow of eddy current, called eddy current loss which is minimized by using very thin laminations of transformer core. ii. Copper loss Transformer windings have electrical resistance When an electric current flows through them, some amount of energy is dissipated due to joule heating. This energy loss is called copper loss which is minimized by using wires of larger diameter. iii. Flux LEAKAGE Flux leakage happens when the magnetic lines of primary coil not completely linked with secondary coil. Energy loss due to this flux leakage is minimized by winding coils ONE over the other. |
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