Modeling of Induction Motors With One and Two Degrees of Mechanical Freedom

by Mendrela, Ernest; Fleszar, Janina; Gierczak, Ewa

• ISBN13: 9781402075445
• ISBN10: 1402075448
• Format: Hardcover
• Copyright: 2003-09-01
• Publisher: Kluwer Academic Pub

Summary

Modeling of Induction Motors with One and Two Degrees of Mechanical Freedom will be of interest to electrical engineering academics and graduate students as well as electric machine designers and engineers involved in control, mechatronics, and automation. This book presents the mathematical model of induction motors with two degrees of mechanical freedom (IM-2DMF), formed in the electromagnetic field as well as in circuit theory, which allows analyzing the performance of these three groups of motors taking into account edge effects, winding and current asymmetry. The model derived is based on the concept of magnetic field wave moving in the air-gap with a helical motion. In general, the rotor moves helically too with the rotary-linear slip. The electromagnetic field as well as motor performance of the particular motors is analyzed. The mathematical model of IM-2DMF is more general to the model of induction motors with one degree of mechanical freedom, i.e. rotary and linear motors. Examples of modeling two types of rotary disc motors and flat linear motor with twisted primary part are presented with inclusion of finite stator and rotor length and width effects. The simulation results are backed by the measurements carried out on the laboratory models, which were tested on the unique measurement stand. By presenting the theory of a group of induction motors with two degrees of mechanical freedom and giving a basis for designing of these type of motors, as well as to give the tool for analysis of their performance, Modeling of Induction Motors with One and Two Degrees of Mechanical Freedom is a must-have book for electrical engineering graduate students and electric machine designers and engineers.

Author Biography

Ernest Mendrela: Louisiana State University Janina Fleszar and Ewa Gierczak: Kielce University of Technology

Table of Contents

Preface	vii
Introduction	1	(4)
Mono-Harmonic Induction Motor With Two Degrees of Mechanical Freedom (IM-2DMF)	5	(24)
Idea of motor and magnetic field description	5	(2)
Rotor slip	7	(4)
Electromagnetic field in multilayer motor	11	(3)
Motor equivalent circuit	14	(9)
Motor fed from the current source	15	(2)
Motor supplied from the voltage source	17	(6)
Performance characteristics	23	(3)
Conversion of mathematical model of IM-2DMF into one of IM-1DMF	26	(3)
Computational Model of Im-2dmf Taking Into Account Finite Dimensions of Primary and Current and Winding Asymmetries	29	(10)
3-D field model of IM-2DMF	30	(4)
Multi-harmonic equivalent circuit	34	(5)
Simulation of Induction Motors With Two Degrees of Mechanical Freedom	39	(28)
Rotary-linear induction motors	39	(22)
Twin-armature rotary-linear induction motor	40	(8)
Double-winding rotary linear motor	48	(4)
Rotary-linear motor with rotating-traveling field	52	(7)
Measurement stand for rotary-linear motor tests	59	(2)
Induction motor with spherical rotor	61	(3)
X-Y linear induction motor	64	(3)
Simulation of Induction Motors With One Degree of Mechanical Freedom	67	(30)
Linear induction motors	67	(8)
Disc-type induction motors	75	(13)
Single-sided disc induction motor	76	(5)
Double-sided disc induction motor	81	(7)
MHD machine -- induction pump	88	(9)
Appendix	97	(8)
References	105	(4)
Index	109