Tsvetana Grigorova
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View article: A Study on a Phase-Shift Controlled ZVS DC-DC Converter with a Synchronous Rectifier
A Study on a Phase-Shift Controlled ZVS DC-DC Converter with a Synchronous Rectifier Open
The paper presents a study on a phase-shift controlled zero-voltage switching (ZVS) full-bridge DC-DC converter employing synchronous rectification using the LTC3722-1 controller. This analysis aimed to examine the impact of additional com…
View article: A Comprehensive Analysis of Losses and Efficiency in a Buck ZCS Quasi-Resonant DC/DC Converter
A Comprehensive Analysis of Losses and Efficiency in a Buck ZCS Quasi-Resonant DC/DC Converter Open
As power electronics continue to advance, the demand for highly efficient and low-loss DC/DC converters has grown significantly. This article comprehensively analyses ZCS quasi-resonant switch cell losses and efficiency in buck L-type zero…
View article: An automatic control system behavioral modeling and parametrized spice model of a full-bridge resonant inverter operating above resonant frequency
An automatic control system behavioral modeling and parametrized spice model of a full-bridge resonant inverter operating above resonant frequency Open
The present paper discusses a parameterized PSpice model of a full-bridge resonant inverter operating above the resonant frequency and an analog behavioral model of a control system with automatic regulation of the root-mean-square value o…
View article: Investigation of the influence of the inertia of the photon counting system on the acceptance accuracy in photon counting mode
Investigation of the influence of the inertia of the photon counting system on the acceptance accuracy in photon counting mode Open
A methodology for determining the minimum distance, ensuring a connection with a negligible influence of the inertia of the photon counting system, is proposed. An algorithm for applying the methodology has been developed. A numerical esti…
View article: Design Considerations of Multi-Phase Buck DC-DC Converter
Design Considerations of Multi-Phase Buck DC-DC Converter Open
The main objective of this article is to propose a rational methodology for designing multi-phase step-down DC-DC converters, which can find applications both in engineering practice and in power electronics education. This study discusses…
View article: LLC Resonant Converter as a Current Source Using Simple Trajectory Control
LLC Resonant Converter as a Current Source Using Simple Trajectory Control Open
This paper discusses a simple method for controlling an LLC resonant DC-DC converter using a state space trajectory based on a linear combination of the voltage across the capacitor and the current through the inductance in the series reso…
View article: A nonlinear model for a three-phase 12/8 switched reluctance machine
A nonlinear model for a three-phase 12/8 switched reluctance machine Open
The paper presents a methodology for the synthesis of a nonlinear model for a three-phase 12/8 switched reluctance machine (SRM) in a MATLAB/Simulink environment. The required switched reluctance motor characteristics are derived using the…
View article: Investigation of Power Losses by Various Brushless Motor Modulation Methods in Motor Mode
Investigation of Power Losses by Various Brushless Motor Modulation Methods in Motor Mode Open
The paper presents a comparative analysis of different modulation techniques for BLDC motor control in terms of several types of losses in the system inverter -BLDC motor in motor mode.The experimental investigated modulation strategies ar…
View article: Simulation and Experimental Investigation of Modulation Techniques for BLDC Motor Control
Simulation and Experimental Investigation of Modulation Techniques for BLDC Motor Control Open
The following paper investigates and analyses the electromagnetic processes in an electrical drive system composed of a power source, a power inverter and a brushless dc (BLDC) motor using known pulse-width modulation (PWM) methods.Investi…
View article: Steady-State Analysis and Modified Control Technique of a Capacitor Voltage Clamped Dual Half-Bridge Series Resonant Inverter
Steady-State Analysis and Modified Control Technique of a Capacitor Voltage Clamped Dual Half-Bridge Series Resonant Inverter Open
The paper discusses the technical problems, which are related to the application of the inverter configurations for electrotechnological purpose with power-limiting property. The examined capacitor voltage clamped dual half-bridge series-r…