EE350 Computer Architecture - April/May 2012 - VI Semester - EEE Important question

B.E./B.Tech. DEGREE EXAMINATION,APRIL/MAY 2010
VI - SEMESTER
B.E. ELECTRICAL AND ELECTRONICS ENGINEERING
EE350 - COMPUTER ARCHITECTURE

Time: 3hrs Max Marks: 100
Answer all Questions
PART – A (10 x 2 = 20 Marks)

1. What is MAR and MBR? What will be the content of MAR and MBR for read and write operation?

2. Define stack. Following operations were performed on stack, which contains an integer item 10.
Push 20, Push 30, Pop, Push 40, Pop, Pop.
What will be the top element of stack after above all operations were completed?

3. Explain with an example, the 2's compliment subtraction.

4. Define Bit-slice processing. What is a bit slice?

5. RISC processors typically have instructions of equal size. What is advantage of such choice?

6. Define micro instruction and micro program.

7. What is the need for memory hierarchy?

8. Define hit ratio. Give the relation between hit ratio and access efficiency.

9. What is an interrupt? Mention its need.

10. Draw block diagram of DMA controller.

PART – B (5 x 16 = 80 Marks)

11. (i) Discuss about the various instruction formats. (8)
(ii) Explain stack organization. (8)

12.a) Draw and explain the flow chart of floating point arithmetic operation for addition and subtraction. (16)

OR

b) Explain Booth algorithm for multiplying two binary numbers. (16)

13.a) Explain about micro programmed control unit with a neat diagram. (16)

OR

b) Design a computer with 512 bytes of RAM 1024 bytes of ROM. The memory is available in 128 bytes RAM chips and 512 bytes of ROM chips. Select appropriate size address and data buses. If needed decoders can be used. Draw the connection and show the address mapping. (16)

14.a)i) Define virtual memory. What is the necessity for using the concept of virtual memory? (16)

ii) Explain with a neat diagram how address mapping is done in paging system. (16)

OR

b) Define Cache memory. Explain anyone mapping procedure. (16)

15.a) Explain programmed IO system and IO processor. (16)

OR

b) (i) Discuss an IO processor and its organization. (12)
(ii) Explain how priority in interrupts are handled. (4) 

EE 2355 DESIGN OF ELECTRICAL MACHINES (DEM)–April / May 2011 Question Paper

Anna University

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011

Sixth Semester

Electrical and Electronics Engineering

EE 2355 — DESIGN OF ELECTRICAL MACHINES

(Regulation 2008)

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Time : Three hours
Maximum : 100 marks
Answer ALL questions

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PART A — (10 × 2 = 20 marks) 1. What is specific Electric Loading?
2. How materials are classified according to their degree of magnetism?
3. Name any two methods to reduce armature reaction.
4. What is slot loading?
5. Give the relationship between emf per turn and kVA rating in a transformer.
6. What are the factors affecting the choice of flux density of core in a transformer?
7. How crawling can be prevented by design in an Induction motor?
8. Define dispersion coefficient of an Induction Motor.
9. What is run away speed of Synchronous Machine?
10. Give the need for damper winding in Synchronous Machine.

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PART B — (5 × 16 = 80 marks) 11. (a) Discuss about various duties and ratings of Rotating Machines and give their respective temperature — time curves. (16)
Or
(b) A field coil has a heat dissipating surface of 0.15 m2 and length of mean turn 1 m. It dissipates loss of 150 W, the emissivity being 34 W/m2_°C. Estimate the final steady temperature rise of the coil and its time constant if the cross section of the coil is 100*50 mm2. Specific heat of copper is 390 J/kg° C. The space factor is 0.56. Copper weighs 8900 kg/m3. (16)
12. (a) (i) Explain the effects of choice of number of poles in a DC Machine on (1) Frequency of flux reversal (2) Weight of iron (3) Weight of copper and (4) Length of commutator. (8)
(ii) A 5 kw, 250 V, 4 pole, 1500 rpm DC Shunt Generator is designed to have a square pole face. The specific magnetic loading and specific electric loadings are 0.42 Wb/m2 and 15000 AC/m respectively. Find the main dimensions of the machine. Assume full load efficiency = 0.87 and pole arc to pole pitch ratio is 0.66. (8) Or
(b) (i) Discuss various methods to determine mmf required for teeth of an Electric Machine. (8)
(ii) Determine the apparent flux density in teeth of a DC machine if the real flux density in teeth is 2.15 Wb/m2, slot pitch is 28 mm, slot width is 10 mm, gross core length is 0.35 m, no. of ventilating ducts is 4 each 10 mm wide. Magnetizing force corresponding to flux density of 2.15 Wb/m2 is 55000 AT/m and iron stacking factor is 0.9. (8)
13. (a) (i) Derive the output equation of a three phase transformer. (8)
(ii) The ratio of flux to full load mmf in a 400 kVA, 50 Hz single phase core type transformer is 2.4*10–6. Calculate the net iron area and the window area of the transformer if the maximum flux density in the core is 1.3 Wb/m2, Current density is 2.7 A/mm2 and window space factor is 0.26. Also calculate the full load mmf. (8)
Or
(b) A 250 kVA, 6600/400V three phase core type transformer has a total loss of 4800 W at full load. The transformer tank is 1.25 m in height and 1 m × 0.5 m in plan. Design a suitable scheme for tubes if the average temperature rise is to be limited to 35° C. The diameter of each tube is 50 mm and are spaced 75 mm from each other. The average height of tubes is 1.05 mm. Specific heat dissipation due to radiation and convection is respectively 6 and 6.5 W/bm2_°C. Assume that convection is improved by 35% due to the provision of tubes. (16)
14. (a) Determine the main dimensions, number of radial ventilating ducts, number of stator slots and turns per phase of a 3.7 kW, three phase, 400 V, 4 Pole, 50 Hz squirrel cage Induction Motor to be started by a Star-Delta starter. Given that the average flux density in the air gap = 0.45 Wb/m2; Ampere Conductor per meter of armature periphery = 23000, full load efficiency = 0.85, full load power factor = 0.84 and kw = 0.955. Take L/ τ = 1.5. (16)
Or
(b) (i) Discuss the factors to be considered in estimating the length of air gap of an Induction Motor. (8)
(ii) Discuss the step by step procedure to design the rotor of a squirrel cage Induction Motor. (8)
15. (a) Define Short Circuit Ratio. Explain how it is determined for an alternator. Also discuss its effects on the performance of alternator. (16)
Or
(b) (i) Derive the output equation of an AC machine. (8)
(ii) Determine the main dimensions of a 100 kVA, 50 Hz, three phase 375 rpm alternator. The average air gap flux density is 0.55 Wb/m2 and ampere conductors per metre is 28000. Given that τ / L must be between 1 to 5. The maximum permissible peripheral speed is 50 m/sec. The runaway speed is 1.8 times synchronous speed. (8)

IT2354 EMBEDDED SYSTEMS NOTES - EEE IT CSE - Anna University Chennai

IT2354 EMBEDDED SYSTEMS NOTES - EEE IT CSE - Anna University Chennai

 

 

NOTES :

 

UNIT I 







UNIT I I








UNIT I I I








UNIT I V








UNIT V










 

EE2254-LINEAR INTEGRATED CIRCUITS AND APPLICATIONS SYLLABUS

IC FABRICATION

IC classification, fundamental of monolithic IC technology, epitaxial growth, masking and etching, diffusion of impurities. Realisation of monolithic ICs and packaging. Fabrication of diodes, capacitance, resistance and FETs.

CHARACTERISTICS OF OPAMP

Ideal OP-AMP characteristics, DC characteristics, AC characteristics, offset voltage and current: voltage series feedback and shunt feedback amplifiers, differential amplifier; frequency response of OP-AMP; Basic applications of op-amp – summer, differentiator and integrator.

APPLICATIONS OF OPAMP

Instrumentation amplifier, first and second order active filters, V/I & I/V converters, comparators, multivibrators, waveform generators, clippers, clampers, peak detector, S/H circuit, D/A converter (R-2R ladder and weighted resistor types), A/D converter - Dual slope, successive approximation and flash types.

SPECIAL ICs

555 Timer circuit – Functional block, characteristics & applications; 566-voltage controlled oscillator circuit; 565-phase lock loop circuit functioning and applications, Analog multiplier ICs.

APPLICATION ICs

IC voltage regulators - LM317, 723 regulators, switching regulator, MA 7840, LM 380 power amplifier, ICL 8038 function generator IC, isolation amplifiers, opto coupler, opto electronic ICs.

REFERENCE

Text Books

1.Ramakant A.Gayakward, ‘Op-amps and Linear Integrated Circuits’, IV edition, Pearson Education, 2003 / PHI. (2000).

2.D.Roy Choudhary, Sheil B.Jani, ‘Linear Integrated Circuits’, II edition, New Age, 2003.

Reference Books

1.Jacob Millman, Christos C.Halkias, ‘Integrated Electronics - Analog and Digital circuits system’, Tata McGraw Hill, 2003.

2.Robert F.Coughlin, Fredrick F.Driscoll, ‘Op-amp and Linear ICs’, Pearson Education, 4th edition, 2002 / PHI.

3.David A.Bell, ‘Op-amp & Linear ICs’, Prentice Hall of India, 2nd edition, 1997.

EE2253-CONTROL SYSTEMS SYLLABUS

SYSTEMS AND THEIR REPRESENTATION

Basic elements in control systems – Open and closed loop systems – Electrical analogy of mechanical and thermal systems – Transfer function – Synchros – AC and DC servomotors – Block diagram reduction techniques – Signal flow graphs.

TIME RESPONSE

Time response – Time domain specifications – Types of test input – I and II order system response – Error coefficients – Generalized error series – Steady state error – P, PI, PID modes of feed back control.

FREQUENCY RESPONSE

Frequency response – Bode plot – Polar plot – Determination of closed loop response from open loop response – Correlation between frequency domain and time domain specifications.

STABILITY OF CONTROL SYSTEM

Characteristics equation – Location of roots in S plane for stability – Routh Hurwitz criterion – Root locus construction – Effect of pole, zero addition – Gain margin and phase margin – Nyquist stability criterion.

COMPENSATOR DESIGN

Performance criteria – Lag, lead and lag-lead networks – Compensator design using bode plots.

REFERENCE

Text Books

1.I.J. Nagrath and M. Gopal, ‘Control Systems Engineering’, New Age International Publishers, 2003.

2.Benjamin C. Kuo, Automatic Control systems, Pearson Education, New Delhi, 2003.

Reference Books

1.K. Ogata, ‘Modern Control Engineering’, 4th edition, PHI, New Delhi, 2002.

2.Norman S. Nise, Control Systems Engineering, 4th Edition, John Wiley, New Delhi, 2007.

3.Samarajit Ghosh, Control systems, Pearson Education, New Delhi, 2004.

4.M. Gopal, ‘Control Systems, Principles and Design’, Tata McGraw Hill, New Delhi, 2002.

EE2252-POWER PLANT ENGINEERING

THERMAL POWER PLANTS

Basic thermodynamic cycles, various components of steam power plant-layout-pulverized coal burners- Fluidized bed combustion-coal handling systems-ash handling systems- Forced draft and induced draft fans- Boilers-feed pumps-super heater- regenerator-condenser- dearearators-cooling tower

HYDRO ELECTRIC POWER PLANTS

Layout-dams-selection of water turbines-types-pumped storage hydel plants

NUCLEAR POWER PLANTS

Principles of nuclear energy- Fission reactions-nuclear reactor-nuclear power plants

GAS AND DIESEL POWER PLANTS

Types, open and closed cycle gas turbine, work output & thermal efficiency, methods to improve performance-reheating, intercoolings, regeneration-advantage and disadvantages- Diesel engine power plant-component and layout

NON-CONVENTIONAL POWER GENERATION

Solar energy collectors, OTEC, wind power plants, tidal power plants and geothermal resources, fuel cell, MHD power generation-principle, thermoelectric power generation, thermionic power generation

REFERENCE

Text Books

1.A Course in Power Plant Engineering by Arora and Domkundwar, Dhanpat Rai and Co.Pvt.Ltd., New Delhi.

2.Power Plant Engineering by P.K. Nag, Tata McGraw Hill, Second Edition , Fourth reprint 2003.

Reference Books

1.Power station Engineering and Economy by Bernhardt G.A.Skrotzki and William A.Vopat- Tata McGraw Hill Publishing Company Ltd., New Delhi, 20th reprint 2002.

2.An introduction to power plant technology by G.D. Rai-Khanna Publishers, Delhi- 110 005.

3.Power Plant Technology, M.M. El-Wakil McGraw Hill 1984.

EE2251 ELECTRICAL MACHINES – I

INTRODUCTION

Electrical machine types – Magnetic circuits – Inductance – Statically and Dynamically induced EMF - Torque – Hysteresis- Core losses - AC operation of magnetic circuits.

TRANSFORMERS

Construction – principle of operation – equivalent circuit – losses – testing – efficiency and voltage regulation – auto transformer – three phase connections – parallel operation of transformers – tap changing.

ELECTROMECHANICAL ENERGY CONVERSION

Energy in magnetic systems – field energy, coenergy and mechanical force – singly and multiply excited systems.

BASIC CONCEPTS IN ROTATING MACHINES

Generated voltages in ac and dc machines, mmf of distributed windings – magnetic fields in rotating machines – rotating mmf waves – torque in ac and dc machines.

DC MACHINES

Construction – EMF and torque – circuit model – armature reaction – commutation – methods of excitation – characteristics of generators – characteristics of motors – starting and speed control – testing and efficiency – parallel operation.

REFERENCE

Text Books

1.Nagrath I. J and Kothari D. P. ‘Electric Machines’, Tata McGraw Hill Publishing Company Ltd, 1990.

2.P.S. Bimbhra, ‘Electrical Machinery’, Khanna Publishers, 2003.

Reference Books

1.Fitzgerald.A.E., Charles Kingsely Jr, Stephen D.Umans, ‘Electric Machinery’, McGraw Hill Books Company, 1992.

2.P. C. Sen., ‘Principles of Electrical Machines and Power Electronics’, John Wiley&Sons, 1997.

3.K. Murugesh Kumar, ‘Electric Machines’, Vikas publishing house Pvt Ltd, 2002.