Control of Induction Motors

by Trzynadlowski

• ISBN13: 9780127015101
• ISBN10: 0127015108
• Format: Hardcover
• Copyright: 2000-10-02
• Publisher: Elsevier Science

Summary

This book is a comprehensive reference source for practicing engineers and students specializing in electric power engineering and industrial electronics. It will illustrate the state of the art in induction motors. Beginning with characteristics and basic dynamic models of induction motors, and progressing to low- and high- performance drive systems. The book will be rich in useful information, without an excessive mathematical burden. Computer simulations resulting in mock oscillograms of physical quantities are used for illustration of basic control concepts. The content of this book is divided into three basic parts: 1) control-oriented description of induction motors, 2) control methods, and systems, 3) control means. An induction motor is presented as an electromechanical power converter, and basic relations between the electrical, magnetic and mechanical quantities in the motor will be explained. Control methods and systems will be classified according to the controlled variables(torque, speed, flux), actuating variables(voltage, current), and dynamic performance (uncontrolled, low-performance, and high-performance). An overview of power electronic converters and information processing equipment used in the modern induction motor drives is included. Such systematic approach will give the readers a comprehensive overview of the field of induction motor control.

Author Biography

Andrzej M. Trzynadlowski is a Professor of Electrical Engineering at University of Nevada, Reno.

Table of Contents

Preface	xi
Background	1	(14)
Induction Motors	1	(2)
Drive Systems with Induction Motors	3	(1)
Common Loads	4	(6)
Operating Quadrants	10	(1)
Scalar and Vector Control Methods	11	(1)
Summary	12	(3)
Construction and Steady-State Operation of Induction Motors	15	(28)
Construction	15	(2)
Revolving Magnetic Field	17	(7)
Steady-State Equivalent Circuit	24	(3)
Developed Torque	27	(4)
Steady-State Characteristics	31	(5)
Induction Generator	36	(4)
Summary	40	(3)
Uncontrolled Induction Motor Drives	43	(12)
Uncontrolled Operation of Induction Motors	43	(1)
Assisted Starting	44	(3)
Braking and Reversing	47	(4)
Pole Changing	51	(1)
Abnormal Operating Conditions	52	(2)
Summary	54	(1)
Power Electronic Converters for Induction Motor Drives	55	(38)
Control of Stator Voltage	55	(1)
Rectifiers	56	(8)
Inverters	64	(5)
Frequency Changers	69	(2)
Control of Voltage Source Inverters	71	(10)
Control of Current Source Inverters	81	(7)
Side Effects of Converter Operation in Adjustable Speed Drives	88	(3)
Summary	91	(2)
Scalar Control Methods	93	(14)
Two-Inductance Equivalent Circuits of the Induction Motor	93	(4)
Open-Loop Scalar Speed Control (Constant Volts/Hertz)	97	(4)
Closed-Loop Scalar Speed Control	101	(1)
Scalar Torque Control	102	(3)
Summary	105	(2)
Dynamic Model of the Induction Motor	107	(12)
Space Vectors of Motor Variables	107	(4)
Dynamic Equations of the Induction Motor	111	(3)
Revolving Reference Frame	114	(3)
Summary	117	(2)
Field Orientation	119	(18)
Torque Production and Control in the DC Motor	119	(2)
Principles of Field Orientation	121	(3)
Direct Field Orientation	124	(2)
Indirect Field Orientation	126	(3)
Stator and Airgap Flux Orientation	129	(5)
Drives with Current Source Inverters	134	(1)
Summary	135	(2)
Direct Torque and Flux Control	137	(22)
Induction Motor Control by Selection of Inverter States	137	(3)
Direct Torque Control	140	(8)
Direct Self-Control	148
Space-Vector Direct Torque and Flux Control	145	(12)
Summary	157	(2)
Speed and Position Control	159	(18)
Variables Controlled in Induction Motor Drives	159	(2)
Speed Control	161	(3)
Machine Intelligence Controllers	164	(9)
Position Control	173	(2)
Summary	175	(2)
Sensorless Drives	177	(26)
Issues in Sensorless Control of Induction Motors	177	(2)
Flux Calculators	179	(4)
Speed Calculators	183	(8)
Parameter Adaptation and Self-Commissioning	191	(6)
Commercial Adjustable Speed Drives	197	(3)
Summary	200	(3)
Literature	203	(18)
Glossary of Symbols	221	(4)
Index	225