Communications - Scientific Letters of the University of Zilina - Latest articles

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Integrating Resilience Indicators into Virtual Operations Support Team for Road Critical Infrastructure in Crisis ManagementSafety and Security Engineering in Transport

Ondřej Ryška, Patricie Gamonová

Communications - Scientific Letters of the University of Zilina 2026, 28(2):F18-F30 | DOI: 10.26552/com.C.2026.029  

Increasing disaster frequency intensifies the need for rapid, location-specific information in crisis management. A Virtual Operations Support Team (VOST) can enhance situational awareness by verifying open-source data, but these outputs are rarely transformed into resilience indicators. In this paper is presented a framework that maps verified VOST outputs and metadata to indicators for road critical infrastructure resilience and links them to the crisis decision cycle. A preliminary test on media data (1 Aug-31 Dec 2024; n = 2,045) confirmed a stable baseline and clear peaks usable for management-defined thresholds and trigger actions. The framework...

External Monitoring System for Battery Condition and State of Health of Lithium-Ion BatteriesElectrical Engineering in Transport

Milan Havelka, Matúš Nečas, Dušan Maga, Juraj Duďák

Communications - Scientific Letters of the University of Zilina 2026, 28(2):C47-C56 | DOI: 10.26552/com.C.2026.028  

Lithium-ion batteries power light electric vehicles such as electric bicycles, but end users typically lack reliable information about true battery health and instead rely on misleading indicators of remaining charge. In this paper is introduced a novel external plug-and-play diagnostic module that connects between the standard charger and a battery of a light electric vehicle. The system uses a precise discrete-time energy integration method during standard charging. It captures dynamic current fluctuations and estimates battery health from the partial charging data. Experimental validation on multiple battery packs demonstrates that the proposed...

Development and Research of Working Parts of Joint Cutting Machines with Cycloidal MotionMechanical Engineering in Transport

Yerbol Kaliyev, Turly Dyussengaliyeva, Beibitbek Zhunisbekov, Manarbek Yessengaliyev, Nurbol Kamzanov, Zhuldyz Dainova, Rustem Kozbagarov

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B89-B98 | DOI: 10.26552/com.C.2026.027  

The development of a country's economy largely depends on the pace and efficiency of construction work, which, in turn, is determined by the extent to which innovative technologies and techniques are used. This work is devoted to justification of the basic parameters and the development of a new working body for a machine for cutting joints in road surfaces. A design with cycloidal motion is proposed, which intensifies the destruction process due to the vibrational impact of the cutters on the material being processed. The use of such a working body provides a vibrational effect, increases the cutting speed, and reduces the energy consumption of the...

The Strength Assessment of the Horizontal Lever in the Brake Transmission of a Freight Wagon BogieMechanical Engineering in Transport

Juraj Gerlici, Alyona Lovska, Vasyl Ravlyuk, Patrik Slušňák

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B82-B88 | DOI: 10.26552/com.C.2026.026  

In this article are discussed the features of selecting the geometric parameters and calculating the strength of the horizontal lever in the brake lever transmission of a freight wagon bogie. The results of the research show that the greatest stresses are concentrated in the areas where the holes for the rollers are located. Since the design stresses are 22% lower than the permissible value, thus the strength of the horizontal lever is obeyed. This research results could be useful in the design of modern brake lever transmission systems.

Development and Research of Special Excavator Buckets for Mining Oil-Bituminous RocksMechanical Engineering in Transport

Yerbol Kaliyev, Shynbolat Tynybekov, Rashida Duisen, Abish Torgayev, Nurbol Kamzanov, Kazyna Ashim, Rustem Kozbagarov

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B73-B81 | DOI: 10.26552/com.C.2026.025  

Given the shortage of petroleum bitumen in the Republic of Kazakhstan, the use of local bitumen-containing rocks is becoming increasingly relevant, which requires the development of specialized mechanization tools. In this paper are discussed the special excavator buckets designed for year-round extraction of rocks with a bitumen content of up to 25%. The design features of the bucket that reduce resistance during digging and unloading are described. Calculations of resistance, chip thickness, operation duration, and productivity of the EO-4121 excavator at different temperatures and bitumen contents were performed. It is shown that unloading becomes...

Design and Permanent Magnets Reduction of Linear Oscillatory Machine for Reciprocating Drives in TransportElectrical Engineering in Transport

Matúš Horník, Pavol Rafajdus, Hao Chen, Yassen Gorbounov, Gojko Joksimović

Communications - Scientific Letters of the University of Zilina 2026, 28(2):C35-C46 | DOI: 10.26552/com.C.2026.024  

Electric vehicles (EVs) require efficient compressors for air-conditioning and battery thermal management, typically driven by a dedicated electric motor. In this paper is dealt with the design and optimization of a stator-magnet transverse-flux linear oscillatory machine (SMTLOM) intended for such compressor applications. The topology employs permanent magnets embedded in the stator, enabling simplified assembly, improved vibration robustness, and reduced dependence on rare-earth materials. A detailed 3D finite element analysis was conducted to maximize the performance, while minimizing the volume of permanent magnets. The results demonstrate the...

Economic and Infrastructure Determinants of Road Traffic Fatalities: Panel Evidence from the Visegrad CountriesOperation and Economics in Transport

Adela Poliaková, Eva Nedeliaková, Piotr Gorzelańczyk, Jakub Malik

Communications - Scientific Letters of the University of Zilina 2026, 28(2):A32-A47 | DOI: 10.26552/com.C.2026.023  

In this study are analysed the determinants of road traffic fatalities in the Visegrad Group countries during 2000-2024, using a balanced panel and fixed-effects models with Driscoll-Kraay standard errors. The results show that the higher motorization and a longer high-standard road network are associated with lower fatalities. By contrast, the GDP per capita and unemployment increase fatalities in the baseline model, although these effects are sensitive to alternative specifications. Public expenditure on road infrastructure has no robust immediate effect, with only limited evidence of delayed benefits. Overall, the findings suggest that the road...

Preparation of Big Data Sets for Optimization of Intercity Freight Driver SchedulesOperation and Economics in Transport

Olexandr Melnychenko, Myroslav Oliskevych, Nazar Khomyn

Communications - Scientific Letters of the University of Zilina 2026, 28(2):A48-A61 | DOI: 10.26552/com.C.2026.022  

The problem of using big data for optimal planning of work and rest of truck drivers in intercity freight transportation is considered. The problem is solved for a team of drivers in compliance with the EU regulation 561/2006. The proposed data preparation can reduce the practical computational complexity and find the optimal driver work schedule. The clustering of the initial data was substantiated for optimizing schedules based on the criterion of compatibility of transport orders. The compatibility of orders follows from the analysis of similarity of two consecutive transportation processes performed by one driver during his/her work shift. Simulation...

Blockchain-Enabled Privacy-Preserving Federated Learning with Deep Capsule Networks for Energy-Efficient Speed Control in Autonomous VehiclesMechanical Engineering in Transport

Sanjith N, M. Nithya, Sreeju P Sreedharan

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B62-B72 | DOI: 10.26552/com.C.2026.021  

Rough roads negatively affect the ride quality and energy efficiency of autonomous vehicles (AVs) and demand adaptive speed control. To solve this, this research proposes a Deep Capsule Network integrated with Sparse Kernel K-means Clustering (DCapsNet + SK-K-means) to accurately reconstruct pavement conditions and adapt vehicle speed in real time. The Privacy-Preserving Federated Learning (PPFL) with Hyperledger Fabric blockchain allows federated learning to be trained in a secure and decentralized manner without the transfer of raw sensor data. With the BDD100K dataset, supervised and reinforcement learning are used. According to the obtained results...

Maritime Freight Cost Shocks and SME Financial Performance in the Visegrad Region during and after COVID-19Operation and Economics in Transport

Aleksandar Alačkov, Michal Červinka

Communications - Scientific Letters of the University of Zilina 2026, 28(2):A19-A31 | DOI: 10.26552/com.C.2026.020  

In this paper is analysed how the maritime freight costs fluctuations (2020-2024) affected the small and medium sized enterprises (SMEs) across the Visegrad Group using firm-level panel data and fixed-effects regressions. Four financial indicators were examined: turnover, gross margin, inventory stock, and cost of goods sold (COGS), with the Shanghai containerized freight index (SCFI) as the key explanatory variable. Higher freight costs are associated with increased turnover, inventories, and COGS, and with reduced gross margins, though the within-firm explanatory power is low. Overall, shipping price shocks leave measurable but modest effects on...

Development of a Factor Analysis Model for Assessing the Technical Readiness of the Railway Rolling StockMechanical Engineering in Transport

Razim Bayramov, Ilham Huseynov, Israil Elyazov, Shamil Heydarov

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B52-B61 | DOI: 10.26552/com.C.2026.019  

In this study was investigated the Technical Readiness Coefficient (TRC) of railway rolling stock and associated technical systems. The primary objective was to identify and analyze the key factors influencing TRC and to develop a structured methodology for the factor analysis of railway technical readiness. The research methodology includes the selection of principal determinants, construction of a descriptive analytical model, processing of empirical operational data, and application of regression and correlation analyses. Empirical and theoretical approaches were employed, using statistical data, maintenance schedules, normative tables, and computational...

Assessment of Vehicular Passenger Occupancy and Its Effect on LOSCivil Engineering in Transport

Rashmi Ranjan Samal, Kundan Samal, Sitansu Kumar Das, Satya Ranjan Samal, Malaya Mohanty

Communications - Scientific Letters of the University of Zilina 2026, 28(2):D39-D48 | DOI: 10.26552/com.C.2026.018  

The expansion of infrastructure in developing countries have led to a surge in car ownership. Although cars offer greater safety, their less passenger occupancy has contributed to reduced level of service (LOS). The present study was aimed to investigate the effect of passenger occupancy of various modes of transport on LOS. Detailed on-field surveys, including video recordings and questionnaires have been used to collect data, which is subsequently analyzed. The study findings suggest that a huge improvement in LOS and congestion can be achieved if public transportation is used more. Even usage of 3Ws and 2Ws can reduce congestion compared to usage...

Enhanced Harris Hawk Multi-Objective Optimization Algorithm for Cognitive Radio-Vehicular Ad Hoc NetworksManagement Science and Informatics in Transport

Md. Asif Hossain

Communications - Scientific Letters of the University of Zilina 2026, 28(2):E21-E32 | DOI: 10.26552/com.C.2026.017  

In this paper is presented an Enhanced Harris Hawk Multi-Objective Optimization (EH-HHO) algorithm for joint spectrum allocation, interference mitigation, and energy efficiency optimization in Cognitive Radio–Vehicular Ad Hoc Networks (CR-VANETs). EH-HHO integrates adaptive exploration, dynamic switching, and crowding-distance preservation to avoid premature convergence and obtain well-distributed Pareto-optimal solutions. Extensive simulations, using the SUMO–OMNeT++, VEINS/ns-3, and hardware-in-the-loop experiments, show superior spectrum utilization, energy savings, and convergence speed compared to NSGA-II and MOPSO. Statistical validation...

Optimizing Combustion Process: The Impact of Flame Zone Air Supply on Emissions and Performance in Pellet BoilerMechanical Engineering in Transport

Alexander Backa, Nikola Čajová Kantová, Peter Hrabovský, Pavol Belány, Róbert Cibula, Sławomir Sładek

Communications - Scientific Letters of the University of Zilina 2026, 28(2):B43-B51 | DOI: 10.26552/com.C.2026.016  

Biomass combustion is a widely used renewable option for a small-scale heat and power, but incomplete burnout and pollutant formation remain challenges in boilers without optimized air staging. In this study, is investigated how controlled transport of air into the flame zone, implemented with an auxiliary tertiary system, affects performance and emissions in a bottom-fed pellet boiler. Tests were performed at constant fuel feed and primary/secondary airflow, with tertiary air varied between 0 and 15.8 m3/h. An airflow of about 8.9 m3/h proved optimal, giving the highest thermal output, a more uniform temperature distribution, and a nearly twentyfold...

Functional Safety-Oriented Risk Analysis of Heavy Vehicle PlatooningSafety and Security Engineering in Transport

Luboš Mikula, Jan Famfulík

Communications - Scientific Letters of the University of Zilina 2026, 28(2):F10-F17 | DOI: 10.26552/com.C.2026.015  

In this paper is presented platooning as a promising approach to reduce the greenhouse gas emissions, fuel consumption, and operation costs in heavy traffic. Attention is given to a risk assessment of vehicle-to-vehicle (V2V) communication in the context of ISO 26262, Edition 2: Road vehicles - Functional safety. [ISO 26262-2 2018] The analysis focuses on safety-related hazards associated with convoy driving of heavy vehicles, utilizing the principles of functional safety. It applies hazard analysis and risk assessment (HARA) to classify potential risks according to their severity, exposure, and controllability. Automotive safety integrity level (ASIL)...

Proposal for the Electric Vehicle Drive Simulator Configuration - Case Study and Simulation ModellingElectrical Engineering in Transport

Ján Markovič, Pavol Špánik, Michal Frivaldský

Communications - Scientific Letters of the University of Zilina 2026, 28(1):C22-C34 | DOI: 10.26552/com.C.2026.014  

Road traffic remains a major contributor to carbon dioxide emissions, making innovative energy solutions essential. Electric vehicles (EVs) offer a promising alternative, however, current lithium-ion batteries face limitations in power output, energy density, and cost. To address these challenges, hybrid energy storage systems (HESS) combine batteries for energy storage with supercapacitors for rapid power delivery. In this study was explored an optimization tool for EV operation using HESS configurations and evaluates performance through MATLAB Simulink simulations across various driving cycles. The results highlight trade-offs between the performance,...

Cloud-Based Modular System for Acquisition and Visualization of OCO-2 Remotely Sensed Co₂ DataElectrical Engineering in Transport

Maroš Valášek, Roman Budjač, Martin Hanzely, Neven Vrček

Communications - Scientific Letters of the University of Zilina 2026, 28(1):C10-C21 | DOI: 10.26552/com.C.2026.013  

In this paper is presented a cloud-based framework for automated acquisition and visualization of Orbiting Carbon Observatory-2 (OCO-2) satellite CO₂ data. The system employs an ETL pipeline with OPeNDAP protocol for selective data retrieval, reducing network overhead while processing L2 Standard and L2 Lite FP products. Built on Amazon Web Services (AWS) infrastructure, using Python (Pandas, Dash, Plotly) and Docker orchestration, the modular architecture implements dependency injection for runtime flexibility. The deployed system achieves daily automated ingestion with 2.25 km × 1.29 km spatial resolution, enabling the real-time monitoring...

Enhancing the Transport Safety through Disdrometer-Based Environmental SensingElectrical Engineering in Transport

Matúš Nečas, Tomáš Ranuša, Dušan Maga, Gabriel Gašpar

Communications - Scientific Letters of the University of Zilina 2026, 28(1):C1-C9 | DOI: 10.26552/com.C.2026.012  

In this study is presented a system for real-time precipitation measurement integrating the laser disdrometer with adaptive control. The system manages large sensor data streams dynamically, enhancing robustness and accuracy under intense weather conditions. Meteorological inputs, combined with communication, enable scalable infrastructure supporting automated safety interventions. Experimental deployment showed improved data fidelity, anomaly detection, and detailed analysis of drop size and velocity distributions. The approach advances intelligent transportation safety and operational reliability through comprehensive environmental sensing and real-time...

Evaluating Port Performance in EU Countries with Fuzzy and Grey LogicOperation and Economics in Transport

Gül Alişar Kayar, İlker İbrahim Avşar

Communications - Scientific Letters of the University of Zilina 2026, 28(1):A1-A18 | DOI: 10.26552/com.C.2026.011  

Ports are fundamental components of global supply chains, and their performance is critical to sustaining international trade and economic activity. Recognizing that existing studies often focus on individual ports rather than broader regional patterns, a new hybrid Multi-Criteria Decision-Making (MCDM) model is proposed to provide a more comprehensive assessment framework. Based on expert judgments, the Fuzzy Analytic Hierarchy Process (AHP) results indicate that cargo type is the most influential determinant, followed by cargo direction and container volume. Using Evaluation based on Distance from Average Solution - Grey (EDAS-G) and Additive Ratio...

Research of the Stress-Strain State of a Mobile Overpass StructureMechanical Engineering in Transport

Alexandr Ganyukov, Sabit S. Amanbayev

Communications - Scientific Letters of the University of Zilina 2026, 28(1):B30-B42 | DOI: 10.26552/com.C.2026.010  

The research is aimed at solving the problem of traffic congestion during the underground repair work in cities. The goal is to develop and analyze a modular mobile overpass that ensures continuous traffic without bypassing repair areas. The stress-strain state of the spatial steel frame of the orthogonal overpass module was studied using analytical methods of structural mechanics - the displacement method and the force method. Critical forces are determined, relationships between bending moments and stiffness of elements are revealed, optimal parameters ensuring strength and stability of structure are determined. The results confirm the feasibility...

Theoretical and Experimental Study of Diesel Engine Exhaust Gas Purification in a Vertical Ultrasonic Muffler StandMechanical Engineering in Transport

Adil Kadyrov, Aliya Kukesheva, Yermek Dyussenbaev, Zhanara Zhunusbekova, Pavel Bezkorovainy

Communications - Scientific Letters of the University of Zilina 2026, 28(1):B18-B29 | DOI: 10.26552/com.C.2026.009  

In this article is presented a new method of ultrasonic cleaning of exhaust gases of diesel engines by coagulation of soot particles and their subsequent sedimentation. The analytical modelling of the particle motion in a vertical muffler stand was carried out, taking into account the ultrasonic effect and gravitational forces. Experimental studies of the developed stand confirmed that ultrasound promotes agglomeration and sedimentation of soot, reduces the CO₂ content and increases the O₂ concentration in the exhaust gases. The maximum cleaning efficiency is achieved with the simultaneous use of all the ultrasonic emitters. The results...

Optimizing Patient Transport under Infection Control Constraints: A Milp-Based Dial-a-Ride ApproachManagement Science and Informatics in Transport

Martin Tóth, Adrián Horváth, Tamás Hajba

Communications - Scientific Letters of the University of Zilina 2026, 28(1):E13-E20 | DOI: 10.26552/com.C.2026.008  

With aging populations and rising healthcare demands, efficient patient transportation has become a critical challenge, particularly in the context of infection control. In this paper is presented an extended mixed-integer linear programming (MILP) model for optimizing patient transport in urban environments, with a focus on the separate transportation of infectious and non-infectious individuals. The model incorporates time windows, maximum allowable ride durations, and mandatory vehicle disinfection requirements. Experimental results obtained using CPLEX demonstrate that incorporating infection control measures significantly influences both route...

Enhancing Visibility and Safety of Thermoplastic Road Markings with Phosphorus Additives and Rosin Ester BinderCivil Engineering in Transport

M. Isya, Cut Mutiawati, Fadhlullah Apriandy, Hadhrat Alfajri

Communications - Scientific Letters of the University of Zilina 2026, 28(1):D27-D38 | DOI: 10.26552/com.C.2026.007  

Road markings are essential traffic control devices that guide drivers, particularly at night and under adverse weather conditions common in tropical regions. In this study is investigated the performance of thermoplastic road markings enhanced with phosphorescent phosphorus using rosin ester as a binder. Laboratory experiments with varying phosphorus concentrations were conducted to evaluate luminance, retroreflectivity, and skid resistance under dry and wet conditions. The results show that a 30% phosphorus content provides the best overall performance by improving the nighttime visibility and retroreflective properties without compromising the skid...

Determining the Efficiency of Cleaning Vehicle Exhaust Gases with an Ultrasonic Muffler Depending on the Engine Operating Mode and Ultrasound PowerMechanical Engineering in Transport

Igor Pak

Communications - Scientific Letters of the University of Zilina 2026, 28(1):B9-B17 | DOI: 10.26552/com.C.2026.006  

The dependence has been obtained that links the degree of coagulation of soot particles, the parameters of the ultrasonic equipment, the geometric dimensions of the ultrasonic muffler, the frequency characteristics of ultrasound, and the parameters of the engine operating mode. In the paper is presented solving of a problem of determining the number of particles in 1 cm³ of exhaust gas depending on the smoke index. An example of calculating the required ultrasound power for a full-size ultrasonic vehicle muffler bench has been given.

Comparison of Braking Dynamics at High Speeds of Firefighting Vehicles on Tatra Chassis with Different Braking SystemsSafety and Security Engineering in Transport

Ladislav Jánošík, Ivana Jánošíková, Tomáš Konečný, Izabela Šudrychová

Communications - Scientific Letters of the University of Zilina 2026, 28(1):F1-F9 | DOI: 10.26552/com.C.2026.005  

In this paper are summarized the results of measurements of the driving characteristics of fire-fighting vehicles during the braking from high speeds. Two water tender vehicles manufactured by TATRA, used by the Fire Rescue Service of the Czech Republic, were compared. The tested vehicles differ in their braking systems. In the study are monitored the braking distance and deceleration, which were compared with previous tests focusing on tire type, test track surface, and weather conditions. When braking from a speed of 80 km/h, the worst results of the braking distance were recorded for SCANIA of 64 m and TATRA TerrNo1 (9T5 2243), of 73 m. These vehicles...

Influence of Traffic Flow Parameters on the Delay Duration at Signalized IntersectionsCivil Engineering in Transport

Taras Postranskyy, Mykola Boikiv, Maksym Afonin, Ihor Mohyla

Communications - Scientific Letters of the University of Zilina 2026, 28(1):D13-D26 | DOI: 10.26552/com.C.2026.004  

In this study is examined the influence of traffic flow parameters on delay duration at signalized intersections of urban multi-lane streets. The findings show that traffic composition strongly affects delays at low volumes, while its influence decreases as total volume grows. These results highlight the need to account for traffic composition, not only volume, when optimizing the signal timing and managing flows. The novelty of the study lies in modelling delay as a joint function of traffic volume and traffic flow composition, where the share of passenger cars is varied independently, rather than through the generalized passenger car unit-based growth,...

Evaluation of Bus Lane Implementation Expediency on Streets with Different Lane Numbers: Case StudyCivil Engineering in Transport

Fuad Dashdamirov, Turan Verdiyev

Communications - Scientific Letters of the University of Zilina 2026, 28(1):D1-D12 | DOI: 10.26552/com.C.2026.003  

The introduction of bus lanes on streets may not be feasible from the standpoint of reducing the overall time loss for road users. The goal of this study was to develop a method for checking the effectiveness of bus lane implementation. Using simulation experiments, conducted in PTV VISSIM, for a different number of traffic lanes, the speeds of buses and vehicles were determined both when buses are moving in the general flow and after the introduction of a bus lane, at different values of flow intensity and bus frequency. Regression equations, describing the dependence of speed on the traffic flow intensity and frequency of buses for different numbers...

An Analytical Model for Calculating the Active Interaction Forces of the Working Body of Earth-Moving Machines with Sticky SoilsMechanical Engineering in Transport

Nurbol Kamzanov, Shynbolat Tynybekov, Nursat Baikenzhe, Guldariya Naimanova, Bakytzhan Kyrgyzbay, Rustem Kozbagarov

Communications - Scientific Letters of the University of Zilina 2026, 28(1):B1-B8 | DOI: 10.26552/com.C.2026.002  

In this study is presented an analytical mathematical model developed to determine the forces arising during the active penetration of machine working bodies into sticky rocks. The methodology is based on the method of element-by-element calculation of resistances, where the contact zone is divided into discrete prisms of material. As a result of the analysis, a final formula for the total penetration force is derived. This formula shows the dependence of the resistance force on the dimensions of the tool (thickness, depth, angle of sharpening) and the physical characteristics of the rock (internal friction, adhesion, stickiness). The model serves...

Dynamic Routing with Static Delivery Time Windows in Urban Last-Mile Transport LogisticsManagement Science and Informatics in Transport

Viktor Danchuk, Oleksandr Hutarevych, Stanislav Popov, José Vicente Busquets-Mataix

Communications - Scientific Letters of the University of Zilina 2026, 28(1):E1-E12 | DOI: 10.26552/com.C.2026.001  

To address the challenges of dynamic routing in the last-mile transport logistics, an adaptive method has been developed for solving a multi-criteria dynamic vehicle routing problem with static time windows, taking into account the actual configuration of the urban road network and the non-stationary traffic dynamics on its sections. At the same time, the method enables the use of consolidated real-time data on the dynamic characteristics of traffic flow on sections of the transport network from any sources available at the time of optimization (e.g., GIS, road sensors, mobile devices, etc.). The results of simulation studies using the ant colony...

Modelling of Dynamic States of Five-Phase Induction MotorElectrical Engineering in Transport

Pavel Záskalický, Daniela Perduková, Ján Kaňuch

Communications - Scientific Letters of the University of Zilina 2025, 27(4):C70-C77 | DOI: 10.26552/com.C.2025.053  

In this paper is presented a mathematical model of a five-phase induction motor with a cage rotor and a stator coils connected to a star. In constructing the mathematical model, It is assumed that the motor is fed from a five-phase frequency converter with an ideal harmonic waveform of the output supply voltage. It is considered that the motor operates in an open control loop with the ability to control the frequency and amplitude of the supply voltage. The basic voltage equations in a two-phase coordinate system coupled to a stator are derived, as well as the relation for the electromagnetic moment. Based on the parameters measured on a real...