(Syllabus) ELECTRICAL ENGINEERING - UPSC MAINS EXAM 2011

SYLLABI FOR THE EXAMINATION PART-B
MAIN EXAMINATION

ELECTRICAL ENGINEERING

PAPER - I

1. Circuit Theory: Circuit components; network graphs; KCL, K V L ; circuitan alysis methods : nodal analysis, mesh analysis; basic network the orems and applications; transient analysis : RL , RC and R L C circuits ;
sinusoidal steady state analysis; resonant circuits; coupled circuits; balanced 3-phase circuits; Two-port networks.

2. Signals & Systems: Representation of continuous–time and systems; convolution; impulse response; time-domain analysis of LTI systems based on convolution and differential/difference equat ions. Four ier t ransform, Laplace transform, Z-transform, Transfer function. Sampling and recovery of signals DFT, FFT Processing of analog signals through discrete-time systems.

3. E.M. Theory: Maxwell’s equations, wave propagation in bounded media. Boundary condi t ions, reflection and refraction of plane waves. Transmission line: travelling and standing waves, impedance matching, Smith chart.

4. Analog Electronics: Characteristics and equivalent circuits (large and small-signal) of Diode, BJT, JFET and MOSFET. Diode circuits: clipping, clamping , rectifier . Biasingand bias stability. FET amplifiers. Current mirror; di f ferent ial , operat ional , feedback and power. Analysis of amplifiers; frequencyresponse of amplifiers. OPAMP circuits. Filters; sinusoidal oscillators: criterion for oscillation; single-transistor and OPAMP configurations. Function generators and switching power supplies.

5. Digital Electronics: Boolean algebra; minimization of Boolean functions; logic gates; digital IC families (DTL, TTL, ECL, MOS, CMOS). Combinational circuits: arithmetic circuits, code converters, multiplexers and decoders. Sequential circuits: latches and flip-flops, counters and shift-registers. Comparators, timers, multivibrators. Sample and hold circuits, ADCs and DACs. Semiconductor memories. Logic implementation using programmable devices (ROM, PLA, FPGA).

6. Energy Conversion: Principles of electromechanical energy conversion: Torque and emf in rotating machines. DC machines: characteristics and performance analysis; starting and speed control of motors; Transformers: principles of operation and analysis ; regulation, efficiency; 3-phase transformers. 3-phase induction machines and synchronous machines: characteristics and preformance analysis; speed control.

7. Power Electronics and Electric Drives: Semiconductor power devices: diode, principles of operation; triggering circuits; phase control rectifiers; bridge converters: inverters; DC-DC converters; Switch mode inverter; basic concepts of speed control of DC and AC Motor drives applications of variable-speed drives. 8. Analog Communication: Random variables: continuous, discrete; probability, probability functions. Statistical averages; probability models; Random signals and noise: whi te noise, noise equivalent bandwidth; signal transmission with noise; signal to noise ratio. Linear CW modulation: Amplitude modulation: DSB.

PAPER - II

1. Control Systems: Applications of feed-back. Control system components. LTI systems: time-domain and transform-domain analysis. Stability: Routh Hurwitz criterion, root-loci, Bodeplots and polar plots, Nyquist’s criterion; Designoflead - ladcompensators. Proportional, PI, PID controllers. Statevariable representation and analysis of control systems.

2 . Microprocessors and Microc omputers: PC organisation; CPU, instruction set, register set, timing diagram, programming, devices.

3. Measurement and Instrumentation: Error analysis; measurement of current, vol tage, power , energy, power - factor , resistance, inductance, capacitance and frequency; bridge measurement. Signal conditioning circuit; Electronic measuring voltmeter, frequency counter, Q-meter, Transducers: thermocouple, thermistor, LVDT, strain-gauge, piezo-electric crystal.

4. Power Systems: Analysis and Control: Steady-state performance of overhead transmission lines and cables; principles of active and reactive power transfer and admittance and impedance matrices; load flow; voltage control and power factor correction; economic operation; symmetrical components, analysis of symmetrical and unsymmet r ical faul ts. Concept of system stability: swing curves and equal area criterion. Static VAR system. Basic concepts of HVDC transmission.

5. Power System Protection: Principles of overcurrent, differential and distance protection. Concept of solid state relays. Circuit breakers. Computer aided protection: Introduction; line bus, generator, transformer protection; numeric relays and application of DSP to protection.

6. Digital Communication: Pulse code modulation (PCM), differential pulse code modulat ion (DPCM) , del ta modulation (DM), Digital modulation and demodulation schemes: amplitude, phase and frequency keying schemes (ASK, PSK, FSK). Error control coding: error detection convolution codes. Information measure and source coding. Data networks, 7-layer architecture.