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A control algorithm for an integrated power factor correction (PFC) and series resonant converter (SRC) using only two switches is presented, allowing to open loop control the AC input current and the DC output current independently. The theory for this approach is analyzed in time domain and a novel approach for open loop regulation is presented and verified. The software defined power (SDF) control...
This article is going to describe the design and implementation of a non-inverting buck-boost converter for lithium-ion battery chargers. The described modulation strategy allows to achieve a high efficiency and high power density converter. The prototype is made up of off-the-shelf components and the elaborated current predictive control algorithm avoids the use of a current sensor. Only voltage...
The objectives of this article were to design a low-cost three-phase AC voltage measurement circuit and new Android smartphone application to monitor the measuring voltage from a safe distance. The smart distance power electronic measurement (SDPEM) system was designed based on an Arduino UNO R3 board used as a microcontroller to read and calculate the RMS values from a three-phase AC voltage measurement...
The need of new curricula in the Internet of things (IoT) for MSc, PhD and engineering levels of education is described. The joint project on curricula development ALIOT, financed in the frame of Erasmus+ program, is discussed. The project ensures adaptation of academic programs in Ukraine and other countries to the needs of the labor market in the EU, thus influencing on the expansion of the opportunities...
Within the framework of this article the authors aim at showing complexity of transition to the processes of discrete control. The article points out the risks of loss of linear and stationary properties, as well as, the sources of errors of an initial model transformation. It is stated, that it necessitates correction of the control algorithms. The conclusion is made, that creation of theoretical...
The availability of affordable Micro Aerial Vehicles (MAVs) opens up a whole new field of civil applications. We present an Infrastructure for Compact Aerial Robots Under Supervision (ICARUS) that realizes a scalable low-cost testbed for research in the area of MAVs starting at about $100. It combines hardware and software for tracking and computer- based control of multiple quadrotors. In combination...
The work deals with researching robustness of information system for measuring of microcontrollers average power consumption. Defined the ways of ensuring robustness of the proposed method. Considered hardware for robustness of the proposed method and proposed methods of study of the robustness of the proposed method.
The power generated by photovoltaic (PV) systems is highly dependent on operating and environmental conditions. In order to increase the efficiency of PV systems, several methods have been developed to track the maximum power point (MPP). This paper proposes an analytical method that introduces a new expression for the extraction of the value of voltage and current at MPP based on the five parameters...
This paper proposes the realization and preliminary characterization of a smart sensor platform for the online monitoring of the residual life of activated carbon air based filters. The platform performs the measurement to give reliable information about the filter maintenance or early warning for the presence of dangerous gases both in industrial and military scenarios. A preliminary feasibility...
A three-channel interleaved Power Factor Correction (PFC) based on a new digital controller STNRGPF01 [7] operating in Continuous Conduction Mode (CCM) is presented in this paper. The control structure is based on a mixed signal concept where the time critical functions such as input current control and fast over current protections are performed using analog parts. All the non-time critical functions,...
Multilevel system architecture of energy efficiency management in the region is developed in this work. The architecture model consists of three levels, namely, level of data collection and management of executive mechanisms, level of control and management of technological process, and level of operator control and formation of administrative decisions. Hardware and software of each hierarchical...
We explore techniques that can be used to reduce the power consumption of gateways in wireless sensor networks deployed in environment monitoring applications, such as Automatic Weather Stations (AWS). The challenge is the deployment of these networks in locations that are far from a consistent power source, such as a national grid. Such stations must be autonomous and power consumption must be minimized...
Evaluating security vulnerabilities of software implementations at design step is of primary importance for applications developers, while it has received litte attention from scientific community. In this paper, we describe virtual prototyping of an implementation of scalar multiplication aiming to make it secure against simple side-channel attacks. Reproducing information leakage as close to reality...
Fault-masking architectures are classified into a few major categories. The first is the multiplication of the microcontroller, the other is a CON-MON architecture (not a full-fledged fault-masking system), there is of course, the multiplication of frequently failing units. In this article, the focus is on the different kind of solutions, how can a duplicated microcontroller based system, monitoring...
Processors in sensor nodes offer very deep sleep modes to save energy and to increase the battery lifetime with the disadvantage that the content of the volatile memory will be typically lost in these modes. The backup and restore of data from volatile to non-volatile memories is expensive regarding the energy budget. Emerging new memory technologies offer the opportunity for new memory layouts in...
This paper deals with the method of elimination of the DC offset impact on the speed estimation system which uses sine/cosine incremental position encoder. The impact of the DC offset in the input signals to the PLL-based speed estimation is shown. The problem can be solved by means of the highpass filter which should be implemented in the angle domain instead of time domain. The simulation and experimental...
This paper discusses the stator winding interturn short fault detection for three phase Permanent Magnet Synchronous Machines (PMSMs). The implementation of the Extended Kalman filter (EKF)-based fault detection algorithm is discussed. The implemented algorithm was verified with the emulated fault during different operating conditions of the drive. Measurements on a real PMSM and the implementation...
Nitriding in plasma is a power-saving technology that provides thermochemical heat treatment used for metallic workpieces in order to improve their mechanical characteristics like hardness and resistance to wear. This paper describes the new implementation of a microcontroller based platform for pulsed Power Supplies used in Plasma Nitriding Systems (PNS). A programmable hardware was integrated into...
Modern semiconductor chips offer a FPGA, A Hard Microcontroller and a programmable Analog circuitry all integrated on a single chip, which gives the system designer a full featured, easy-to-use design and development platform where all the units are programmable and under full control of the designer, Combining this state of the art silicon chip with a Real Time Operating Systems (RTOS) gives an Engineer...
This paper presents radio frequency identification (RFID) based prepaid energy meter and home automation system with an android application running at subscriber's mobile station. The energy meter is credited though RFID technology and the automation of different appliances are controlled by the subscriber via an android mobile application. The subscribers may check their current credit, consumed...
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