PX7201 SOLID STATE DC DRIVES SYLLABUS 2013 REGULATION

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SOLID STATE DC DRIVES Anna University Question MAY/JUNE 2016
PX7201 - SOLID STATE DC DRIVES

PX7201                                            SOLID STATE DC DRIVES                            L T P C                                                                                                                                3 0 0 3

OBJECTIVES:

  • To understand steady state operation and transient dynamics of a motor load system
  • To study  and  analyze  the  operation  of  the  converter  /  chopper  fed  DC  drive,  both qualitatively and quantitatively.
  • To analyze and design the current and speed controllers for a closed loop solid state DC motor drive.
  • To understand the implementation of control algorithms using microcontrollers and phase locked loop.

UNIT I     DC MOTORS FUNDAMENTALS AND MECHANICAL SYSTEMS                       9

DC   motor- Types, induced emf, speed-torque relations; Speed control – Armature and field speed control; Ward Leonard control – Constant torque and constant horse power operation – Introduction to high speed drives and modern drives. Characteristics of mechanical system – dynamic equations, components of torque, types of load; Requirements of drives characteristics – stability of drives – multi-quadrant operation; Drive elements, types of motor duty and selection of motor rating.

UNIT II     CONVERTER CONTROL                                                                                 9

Principle of phase control – Fundamental relations; Analysis of series and separately excited DC motor with single-phase and three-phase converters – waveforms, performance parameters, performance characteristics. Continuous and discontinuous armature current operations; Current ripple and its effect on performance; Operation with free wheeling diode; Implementation of braking schemes; Drive employing dual converter.

UNIT III    CHOPPER CONTROL                                                                                     9

Introduction to time ratio control and frequency modulation; Class A, B, C, D  and E chopper controlled DC motor – performance analysis, multi-quadrant control – Chopper based implementation of braking schemes; Multi-phase chopper; Related problems.

UNIT IV   CLOSED LOOP CONTROL                                                                               9

Modeling of drive elements – Equivalent circuit, transfer function of self, separately excited DC motors; Linear Transfer function model of power converters; Sensing and feeds back elements – Closed loop speed control – current and speed loops, P, PI and PID controllers – response comparison. Simulation of converter and chopper fed d.c drive.

UNIT V    DIGITAL CONTROL OF D.C DRIVE                                                                 9

Phase Locked Loop and micro-computer control of DC drives – Program flow chart for constant horse power and load disturbed operations; Speed detection and current sensing circuits.

                                                                                                        TOTAL : 45 PERIODS

REFERENCES

  1. Gopal K Dubey, “Power Semiconductor controlled Drives”, Prentice Hall Inc., New Yersy, 1989.
  2. R.Krishnan, “Electric Motor Drives – Modeling, Analysis and Control”, Prentice-Hall of India Pvt. Ltd., New Delhi, 2010.
  3. Gobal K.Dubey, “Fundamentals of Electrical Drives”, Narosal Publishing House, New Delhi, Second Edition ,2009
  4. Vedam Subramanyam, “Electric Drives – Concepts and Applications”, Tata McGraw-Hill publishing company Ltd., New Delhi, 2002.
  5. P.C Sen “Thyristor DC Drives”, John wiely and sons, New York, 1981.

PX7201 SOLID STATE DC DRIVES SYLLABUS 2013 REGULATION PDF    Click Here To Download 

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