Electric M/C - I 3.0
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ABOUT Electric M/C - I
Simple & clean notes of electric m/c-I for electronics engineering.it contain all important topics which are given below chapter wise Unit-I Transformer-I Working principle e.mf. equation construction phasor diagrams equivalent circuit voltage regulation losses separation of hysteresis and eddy current losses efficiency tests: open circuit and short circuit load Sumpner’s test Condition for maximum efficiency and regulation Power and distribution transformer allday efficiency Excitation phenomenon Autotransformer: working, advantages its equivalent circuit and phasor diagram Unit II Transformer-II Three phase transformer: its construction groups and connections their working and applications Scottconnection Parallel operation of Transformers Tap changers cooling conservator and breather Pulse and high frequency transformers Unit III Three phase Induction Motor-I Working principle construction comparison of slip ring and squirrel cage motors steady state analysis phasor diagram and equivalent circuit power flow diagram torque-speed and power-speed characteristics Losses and efficiency No load and block rotor test circle diagram Unit IV Three phase Induction Motor-II Starting of squirrel cage and slip ring motors power factor control Cogging & Crawling Double cage &Deep bar Indication Motor impact of unbalanced supply and harmonics on performance speed control Induction Generator. Applications Unit V Single Phase Motors: Single Phase Induction motor double revolving field theory, equivalent circuit and its determination performance calculation starting methods and types of single phase Induction motors their working principle and applications comparison with three phases Induction Motor Single phase A.C. series motor Servo motors