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ELECTRICAL ENGINEERING AND INSTRUMENTATION: Beginner Guide
ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT I DC MACHINES 9 Three-phase circuits, a review. Construction of DC machines Theory of operation of DC generators Characteristics of DC generators- Operating principle of DC motors Types of DC motors and their characteristics Speed control of DC motors- Applications. 9 Introduction Single-phase transformer construction and the principle of operation EMF equation of transformer-Transformer noload phasor diagram - Transformer onload phasor diagram - Equivalent circuit of transformer Regulation of transformer Transformer losses and efficiency- All day efficiency autotransformers. 9 Principle of operation of three-phase induction motors Construction Types Equivalent circuit Construction of single-phase induction motors Types of single-phase induction motors Double revolving field theory starting methods - Principles of alternator Construction details Types Equation of induced EMF Voltage regulation. Methods of starting synchronous motors Torque equation V curves Synchronous motors. 9 Static and Dynamic Characteristics of Measurement Errors in Measurement - Classification of Transducers Variable resistive Strainguage, thermistor RTD transducer - Variable Capacitive Transducer Capacitor Microphone - Piezo Electric Transducer Variable Inductive transducer LVDT, RVDT 9 DVM, DMM Storage Oscilloscope. Comparison of Analog and Digital Modes of operation, Application of measurement system, Errors. Measurement of R, L, and C, Wheatstone, Kelvin, Maxwell, Anderson, Schering and Wien bridges Measurement of Inductance, Capacitance, Effective resistance at high frequency, Q-Meter. Read more