ELK 454E SPRING 2004

Course Outline

Week

Topics

1

Introduction: overview of electric energy conversion, typical electric motor applications, electric drives and related disciplines.

2

Basic Mechanical Principles: kinematics and kinetics of objects in linear and circular motion.

3

geometrical interpretation of motion problems, integrating motion equations, work power, energy and the moment of inertia.

4

Dynamics of Electric Drives: equations of motion: linear and circular motion, graphical methods for integrating motion equations;

5

Elements of Drive Systems: gear mechanisms, experimental determination of the moment of inertia, Coupling mechanisms: direct coupling, gear mechanisms, belt-pulley mechanisms, lead-screw mechanisms, multi coupling systems;

6

Elements of Drive Systems: gear mechanisms, experimental determination of the moment of inertia, Coupling mechanisms: direct coupling, gear mechanisms, belt-pulley mechanisms, lead-screw mechanisms, multi coupling systems;

7

Friction in Drive Systems: viscous friction, Coulomb friction, windage torque, aerodynamic drag forces; Efficiency of Drive Mechanisms: direct coupling, coupling through a gear mechanism, systems converting circular motion to linear motion, equivalent moment of inertia, coupling with multi-stage mechanisms,

8

Torque-Speed Characteristics of Industrial Loads: constant torque, squared-power torque, squared torque, constant-power torque characteristics;

9

Power Requirements of Drives Systems: drive systems with translational and rotational motion; Operational Time Characteristics: starting time, time to change operation point, breaking time;

10

Operational Requirements of Drive Systems: four-quadrant operation, steady-state stability, transient stability; Operational Properties of Drive Systems: speed adjustment range, speed adjustment economy, speed adjustment stability, speed adjustment direction, overloading effects;

11

Operating Characteristics of Electric Motors: motors with shunt and series characteristics; torque-speed characteristics motors: DC motors: shunt, series, long shunt and short shunt compound motors, induction motors.

12

Operating Characteristics of Electric Motors: motors with shunt and series characteristics; torque-speed characteristics motors: DC motors: shunt, series, long shunt and short shunt compound motors, induction motors.

13

Speed Control Electric Motors: DC motors and induction motors; Classification of Electric Motors and Motor Selection.

14

Thermal Effects in Electric Motors: insulation classes, sources of losses, simplified thermal model of electric motors, modes of operation: continuous duty, short-time intermittent duty, determining short time overload limits, periodic intermittent duty.

 

© 2002 Levent Ovacik,