Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...

Introduction
Therefore, the following thesis can be formulated:
“In the view of commercial manufacturing process the most convenient control scheme
for voltage source inverter-fed permanent magnet synchronous motor (PMSM) drives is
direct torque control with space vector modulator (DTC-SVM)”.
To prove the above thesis, the author used methodology based on an analyze and simulation
as well as experimental verification on the laboratory setup with 3kW PMSM motor.
Moreover, the presented control algorithm DTC-SVM has been introduced and used in serial
commercial product of Polish manufacture TWERD, Toruń.
In the author’s opinion the following results of the thesis are his original achievements:
• development of a simulation algorithm in SABER package for the investigation
of PWM inverter-fed PMSM control,
• elaboration and experimental verification of digital flux and torque controller
design based on the Z-transform approach for series (cascade) and parallel
structure of DTC-SVM schemes,
• implementation and verification of series (cascade) and parallel DTC-SVM
schemes on experimental laboratory setup with 3kW PM synchronous motor
drive controlled by floating point DS1103 board.
• bringing into production and testing of developed DTC-SVM algorithm in Polish
industry.
The thesis consists of eight chapters. Chapter 1 is an introduction. In Chapter 2 mathematical
model of PM synchronous motor and his basic control modes are presented. Chapter 3 is
devoted to voltage source inverter, his nonlinear characteristics and different PWM
techniques. Chapter 4 gives brief review of PM synchronous motor control method such as
FOC and classical DTC. In Chapter 5 two kind of DTC-SVM control schemes are presented.
Also, the analysis and synthesis of digital flux, torque and speed controllers based on Z
transform approach are given. Chapter 6 is devoted to initial rotor detection methods, stator
flux vector and rotor speed estimation algorithms. In Chapter 7 experimental results are
6