b

1. Seminar Report 2020 Electrical Machines Used In Electric Power Steering Applications
Dept. of EEE i UEC Vallivattom
ACKNOWLEDGEMENT
I express my sincere thanks to my Seminar guide Mr. FEBIN RAJU for the deal
with which he guided me in carrying out my Seminar work. I am deeply indebted to my
guide for his valuable guidance, constant encouragement and suggestions throughout
the course of my Seminar work.
I express my gratitude to Mrs. REMYA V R Head of the Department for
providing me permission to carry out this work.
I would like to express my gratitude to all the faculty members of Electrical
Engineering Department for their sincere concern and constant encouragement
throughout the course of my Seminar work.
I thank the Almighty for the uncountable blessings bestowed upon me all through
my life and especially during the period of my Seminar work.
With great pleasure I express my gratitude to my family and to all my friends
without whose support and encouragement this work would not have been possible.
ABHISHEK C BABU
LUNT17EE021

2. Seminar Report 2020 Electrical Machines Used In Electric Power Steering Applications
Dept. of EEE ii UEC Vallivattom
ABSTRACT
Electric auxiliaries are components that interact with the main systems and
components of the car to fully support its functionality. Basically, they are related to
safety, comfort or drive train applications in vehicle systems. Advanced vehicles electric
power steering systems owing several advantages are replacing the classical hydraulic
ones. The main part of such systems is the electrical machine developing the required
steering torque.

3. Seminar Report 2020 Electrical Machines Used In Electric Power Steering Applications
Dept. of EEE iii UEC Vallivattom
CONTENTS
Title
Page
No
ACKNOWLEDGEMENT i
ABSTRACT ii
LIST OF FIGURES iv
Chapter 1 INTRODUCTION 1
Chapter 2 ELECTRIC POWER STEERING SYSTEM 2
Chapter 3 BASIC REQUIREMENTS FOR THE ELECTRICALMACHINES 4
3.1 ELECTRICAL MACHINES SPECIFICATIONS 5
Chapter 4 ELECTRICAL MACHINES PROPOSED FOR EPSSYSTEMS 6
4.1 BUSHED DC MACHINES 6
4.2 INDUCTION MACHINES 6
4.3 SWITCHED RELUCTANCE MACHINES 7
4.4 BRUSHLESS DC MACHINES 8
4.5. PERMANENT MAGNET SYNCHRONOUS MACHINES 8
4.6 OTHER ELECTRICAL MACHINES 11
Chapter 5 CONCLUSION 14
REFERENCES 15

4. Seminar Report 2020 Electrical Machines Used In Electric Power Steering Applications
Dept. of EEE iv UEC Vallivattom
LIST OF FIGURES
Figure
No
Title
Page
No
1.1 Car Auxiliaries Driven By Electrical Machines 1
2.1 a) Conventional system 2
2.1 b) Steer-by-wire system 2
2.2 EPS system with the electrical machine placed on the steering column 3
4.1 Connection variants of the three – phase systems in a six-phase IM 6
4.2 Stator 7
4.3 Rotor 7
4.4 BLDC machine developed for vehicle auxiliary systems 8
4.5 Skewing of the surface mounted PMs 9
4.6 The rotor of an interior PMSM 9
4.7 Buried PMSM designed for EPS systems 10
4.8 Interior PMSM with flux barriers. Cross section and flux lines 10
4.9 Flux lines in the PM SMs resulted from field computations 11
4.10 Coaxially magnetic-geared linear actuator for EPS applications 12
4.11 PM – Rotary linear Motor 13