Akademik Veri Yönetim Sistemi
Duvar Yayınevi, Ankara, 2023
AC motors are predominantly used in electric vehicles (EVs) due to their
high efficiency and the ability to provide more power with smaller and lighter
engines. Additionally, most applications, especially EVs, require a single DC
source for ease of use. In this thesis, a new 31-level multi-level inverter (MLI)
circuit fed from a single source is proposed for EVs. In the proposed topology,
switched diode structure is used as the main circuit and DC bus voltages are
obtained by scaling asymmetrically and using high frequency link (HFL)
method with toroid transformer. Nearest level control (NLC) is used for
minimum total harmonic distortion (THD) in the output waveform. The
simulation of the proposed topology was carried out in the Matlab/Simulink
program and the simulation results were confirmed by experimental studies
using FPGA. In studies, as a load; pure resistive and induction motor are used.
In addition, the filter effect is shown by adding various filters to the proposed
EMI. As a result, the proposed topology created a high voltage output stage
with low voltage switches. A topology suitable for the EV drive system, with a
single DC source and an output voltage THD value of 2.7% without using a
filter, was obtained.