الفهرس 
Chapter1:IntroductionOnly 14 pages are availabe for public view
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Abstract
During the latter part of the 20th century, there have been changes, which may
make the electric vehicle a more attractive proposition. Firstly, there are increasing
concerns about the environment, in terms of both overall emissions of carbon
dioxide and the local emission of exhaust fumes, which help, make crowded towns
and cities unpleasant to live in. Secondly, there have been technical developments
in vehicle design and improvements to rechargeable batteries, motors and
controllers.
Inverter is substantially an interface between DC source like photovoltaic cell and
AC networks. There are many doable inverter topologies and switching schemes,
and each one will have its own relative benefits and downsides. Efficiency and
output current distortion are two necessary factors governing the selection of inverter
system; two inverter-switching strategies are explored. These are the unipolar and
bipolar current controlled inverter employing both the SPWM (Sinusoidal Pulse
Width Modulation) and the THPWM (Third Harmonic Pulse Width Modulation)
techniques. The models of these techniques are simulated using MATLAB-Simulink
software. Simulation results are compared with results of an experimental prototype
to confirm validity of results.
The constant V/F control method is one of the most common speed control
methods for Induction motors (IMs) used in industries. The present thesis studies the
V/F control method of induction motor and improves the motor performance with
three proposed techniques. The performance of induction motor drive with closedloop
V/F control method using different Pulse Width Modulation (PWM) techniques
such as sine triangle Pulse Width Modulation (SPWM), Third-Harmonic Pulse
Width Modulation (THPWM) and Space Vector Pulse Width Modulation
(SVPWM) is investigated using MATLAB/Simulink. Induction motor is modelled
in the synchronous q-d reference frame. The performance of induction motor drive
with full load torque is compared using these techniques for total harmonic distortion
(THD), harmonics spectra, utilization of DC supply voltage, fundamental peak of the output voltage and motor speed. The dynamic performance of induction motor
drive using SVPWM under reference speed and load torque variations are
investigated also.
The presents an adaptive (FLC) design technique for controlling an IM speed
drive using fuzzy PI control and using only PI controller. which are supplied to
SVPWM to generate switching pulses for the inverter switching of IGBTs because
low THD the output of voltage, the approach a fitness to attain an optimum trajectory
planning, the used of fuzzy logic with PI technique to control the speed of threephase
IM. The use of MATLAB/Simulink to study performance is evaluated in
comparison with PI control scheme and FL-PI control the speed of asynchronous
machine, the mean absolute error (MAE) of the asynchronous motor speed response
is used as a fitness function. The actual velocity of an asynchronous motor is
compared with a reference velocity. The mistake is given through FL-PI and PI
control, and their outputs control the focal ratio of V/f control is applied to control
the voltage magnitude of asynchronous motor. The advantages of V/f control include
low-cost because to need speed of IM implementation and the best choices for
variable speed and torque applications an optimal FLC based PI control efficiency
function is also employed to tune and minimize the mean absolute error to improve
the performance of the asynchronous motor in terms of changes in speed and torque.
Results obtained from the fuzzy-PI control are compared with those obtained
through PI controller to confirm the expanded controller.
Dynamic model of the induction motor in vector control form and characteristic
features of the FOC scheme were presented. Mathematical transformations are
carried out using Clarke and Park transformations to decouple variables and to
facilitate the solutions of complicated equations with time varying coefficients. The
simulation of the IFOC scheme is described and the simulation results are presented.
A dynamic simulation model of electric vehicle (EV) was developed using
MATLAB/Simulink. The EV model has a configurable structure that is suitable to
simulation with multiple fidelity levels. The model has a configurable structure that is suitable to simulation with multiple levels. The powertrain system model
developed using MATLAB/Simulink could also be used as a generic, modular and
flexible vehicle-modeling platform to support the integration of powertrain design
and control system optimization.