JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Machine Modeling and Analysis

Course Objectives:

• To introduce generalized modeling of electrical machines
• To analyze different electrical machines with dynamic modeling

Course Outcomes

After completion of the course, students will be able to:

• Understand the basic mathematical analysis of electrical machines and its characteristics.
• Understand behavior of electrical machines under steady state and transient state.
• Understand dynamic modeling of electrical machines.

UNIT - I

BASIC MACHINE THEORY Electromechanical Analogy, Magnetic Saturation, Rotating field theory, Operation of Inductor motor, Equivalent circuit, Steady state equation of DC machines, Operation of synchronous motor, Power angle characteristics.

UNIT - II

ELECTRODYNAMICAL EQUATION & THEIR SOLUTIONS Spring and Plunger system, Rotational motion, mutually coupled coils, Lagrange’s equation, Application of Lagrange’s equation, and Solution of Electro dynamical equations.

UNIT - III

DYNAMICS OF DC MACHINES Separately excited DC generator and motors, Steady-state and Transient analysis, Interconnection of machines, Ward Leonard system of speed control.

UNIT - IV

INDUCTION MACHINE DYNAMICS Induction machine dynamics during starting and braking, Accelerating time, Induction machine dynamic during normal operation, Equation for dynamical response of the induction motor.

UNIT - V

SYNCHRONOUS MACHINE DYNAMICS Electromechanical equation, Motor operation, Generator operation, Small oscillations, General equations for small oscillations, Representation of the oscillation equations in state variable form.

TEXTBOOKS:

• 1. Sen GuptaD.P. and J.W, “Electrical Machine Dynamics “, Macmillan Press Ltd., 1980.
• 2. Bimbhra P.S., “Generalized Theory of Electrical Machines”, Khanna Publishers, 2002.

REFERENCES:

• 1. Vedam Subranmanyam, “Thyristor control of Electric Drives”.
• 2. Article in IEEE Transactions on Energy Conversion, “Performance Optimization of Induction motors during Voltage-controlled soft starting”, July 2004. M. Tech – III Semester L T P C 3 0 0 3