Development of Brushless DC Motor Drive System for Teaching Purposes Using
Different Speed Control Techniques
Hebatallah H. El-Zohri1
; Khairy Sayed2
; Adel Ahmed 2
1 Faculty of technology and Education, Sohag University, Sohag, Egypt.
2 Faculty of Engineering, Sohag University, Sohag, Egypt.
3 Faculty of Engineering, Assiut University, Assiut, Egypt.
ABSTRACT
In this paper, a test bench was developed for
teaching purposes to enhance power electronics and
real time control of Brushless DC motor
comprehensively, particularly with regard to PWM
techniques, signal generation and speed control
theoretically and experimentally using
Matlab/Simulink environment, assisted with DSP
programming kit in practice. First a model was
developed under Matlab/Simulink. The control
strategies implemented involve two PWM techniques,
namely soft and hard switching. The system is built in
a way that the students are able to carry out modeling
and confirm their results through the testing bench
using these techniques. The used approach has been
effective in the way that has led to the student
satisfaction. It has shown their learning has been
improved with regard to the drive control applications
either as a variable speed drive or in embedded
systems. Brushless direct current (BLDC) motors are
mostly preferred for dynamic applications such as
automotive industries, pumping industries. Moreover,
it is predicted that by 2030, BLDC motors will
become mainstream of power transmission in
industries replacing traditional motors. A Brushless
DC motor electric vehicle is the best solution for green
transportation due to their high efficiency and zero
greenhouse gas emissions. The increased reliability,
flexibility, high efficiency, longer life, reduced
friction, faster rate of voltage and current and
precision voltage and current applied to field coils
could be regarded as the most important advantages
of (BLDC) motors.
Keywords: BLDC Motor, Current Control, Pulse
Width Modulation, motor drive, Speed Control of
BLDC Motors.
1. INTRODUCTION
The world is stepping forward toward the
development of technologies to derive energy from
sustainable resources and the technologists are
thriving hard to mitigate the challenges such as
shortage of fuels and clean/renewable energy due to
interference, acoustic noise, torque ripple, and flux
ripple should be controlled. Thus, the controlling
techniques are discussed in this paper. Since BLDC
motors are used costs for energy, global warming, and
various environmental issues [1]. We will focus
on these storage technologies which form the core of
the technological innovations needed to design and
develop renewable energy. We have highlighted the
salient features of each of these technologies and
compared them in terms of their power/energy
density, and cost to meet the global challenges, and
their ability to manage the scarcity of existing
resources and competitiveness in meeting
sustainability standards [2].
Brushless DC Motor (BLDCM) has been widely used
in industrial automation, household appliances,
automotive electronics, aerospace and other fields due
to its simple structure, high output torque, long
lifetime and high efficiency. However, the key to its
control process is how to get the accurate information
of rotor position and speed [3]. Some achievements
have been made in the research of non-position
control technology of brushless DC motor after
decades of research by scholars at home and abroad.
The counter electromotive force method is the most
mature method in application at present, and it can
obtain commutation information at a time delay of
300 by detecting the counter electromotive force
signal extracted from the terminal voltage of the
motor. But it is difficult to detect the counter