Lidija B Petkovska - Academia.edu (original) (raw)
Papers by Lidija B Petkovska
The European Physical Journal Applied Physics
In the paper is presented a step-by-step development of the topology for a novel single phase per... more In the paper is presented a step-by-step development of the topology for a novel single phase permanent magnet (PM) brushless DC (BLDC) motor, aiming to improve its operation with more efficient utilisation of the active materials. The studied motor is based on a generic design, where asymmetrical stator poles and respective shaping of the permanent magnets is applied. Accurate 2D finite element simulations were employed for numerical prototyping of the motor design, until the expected results were obtained. Based on FEA, cogging and static torque waveforms, along with other relevant performance characteristics were determined and examined. The results show that the motor topology, and in particular, the detailed shape of the stator poles has the most important impact on the smooth operation of the single phase BLDC permanent magnet motor.
International Journal of Applied Electromagnetics and Mechanics
In the paper an original approach to efficiency map optimal synthesis is presented. A permanent m... more In the paper an original approach to efficiency map optimal synthesis is presented. A permanent magnet motor, working as controlled AC motor of synchronous type (PMSM), is selected as a case study. The first target of this research is to derive a lumped-parameter model of the motor (low-fidelity model), validated by magnetic field analysis (high-fidelity model). In turn, the end target is these two models application in a cost-effective optimisation procedures, where the goal is to identify the motor geometry maximizing the map area which is encompassed by a prescribed value for the motor efficiency.
International Journal of Applied Electromagnetics and Mechanics
This paper presents a novel approach to the efficiency improvement of permanent magnet synchronou... more This paper presents a novel approach to the efficiency improvement of permanent magnet synchronous motor using gravitational search algorithm as an optimization tool. The gravitational search algorithm (GSA) is a recently developed meta-heuristic optimization algorithm, which so far has proven to be quite suitable for solving power engineering optimization problems. The aim of this research work is to implement this novel optimization algorithm for the efficiency improvement of permanent magnet synchronous motor, where the objective function in the optimization process is the efficiency of the investigated motor. Comparative analysis of the initial and a number of optimized solutions of the motor model is performed.
Проектот опфаќа развој на генетски алоритми и нивна примена за оптимално проектирање на електрома... more Проектот опфаќа развој на генетски алоритми и нивна примена за оптимално проектирање на електромагнетни уред
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2020
Purpose This paper presents the design techniques applied to a novel fractional-slot 6/4 pole per... more Purpose This paper presents the design techniques applied to a novel fractional-slot 6/4 pole permanent magnet brushless direct current (PMBLDC) motor, for cogging torque reduction. The notable feature of this motor is the simplicity of the design and low production cost. The purpose of this paper is to reduce the peak cogging torque of the motor. The focus is put on the stator topology tuning, and a new design for the stator poles is proposed. By determining the optimum stator pole arc length and the best pole shoe thickness, the cogging torque is significantly reduced. This new optimised motor design has been analysed in detail. The validation of the results is documented with respective figures and charts. Design/methodology/approach At the beginning, the design data for the 6/4 pole PMBLDC motor with concentrated three phase windings and asymmetric stator pole arcs is presented. In the study, this motor is taken as a reference model (A0, T0). A full performance finite element an...
This paper presents the optimum design for a double stator, cup rotor machine; a novel type of BL... more This paper presents the optimum design for a double stator, cup rotor machine; a novel type of BLDC PM Machine. The optimization approach is divided into two stages: the first stage is calculating the machine configuration using Matlab, and the second stage is the optimization of the machine using Finite Element Modeling (FEM). Under the design specifications, the machine model will be selected from three pole numbers, namely, 8, 10 and 12 with an appropriate slot number. A double stator brushless DC permanent magnet machine is designed to achieve low cogging torque; high electromagnetic torque and low ripple torque.
2019 19th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering (ISEF), 2019
In this paper the design aspects for fractional slot permanent magnet brushless DC motors (PMBLDC... more In this paper the design aspects for fractional slot permanent magnet brushless DC motors (PMBLDCM) are presented. Fractional slot machines are characterised by a noninteger number of slots per pole per phase. They have an inherently low cogging torque and possess a fault-tolerant capability. The concentrated phase coils, preferably placed on every other tooth with double the numbers of turns for an increased phase inductance, limit short circuit currents and can allow sustained operation under fault conditions. A further design consideration is the use of an irregular distribution of slots, which can enhance a low-to-free cogging torque operation and increased phase inductance. The paper concludes with some practical results from a 3 phase 12 slot 4 pole prototype machine.
7th Symposium on Applied Electromagnetics SAEM`18: Conference Proceedings, 2019
The International Symposium on Applied Electromagnetics is aimed at the presentation of research ... more The International Symposium on Applied Electromagnetics is aimed at the presentation of research work results in various areas of Applied Electromagnetics. The Symposium is devoted to exchanging ideas, presenting achievements and results, providing the forum for researchers and academics. Open and friendly atmosphere, which our conferences are known for, encourages especially young researchers to present their achievements and ideas, even at an early stage of their research work. The Symposium continues the tradition of joint conferences, organised in previous years by the organisers from Macedonia, Poland, Slovenia and Hungary. The symposium is open for participants from all over the world. This year's symposium took place between 17th and 20th June 2018 in Podčetrtek, Slovenia. We would like to thank all the participants for their participation at the International Symposium on Applied Electromagnetics and wish them a successful academic career.
In this paper a particle swarm based optimal design of single-phase permanent magnet brushless DC... more In this paper a particle swarm based optimal design of single-phase permanent magnet brushless DC motor (SPBLDCM) is proposed. This approach employs a particleswarm-optimisation (PSO) technique as a search tool for optimal design solution of a SPBLDCM based on the value of the objective function. The efficiency of the motor is selected as an objective function. Several optimisation solutions are analysed and a best solution is proposed based on the optimisation parameters, as well as other important motor parameters. An overall comparison of the best optimal solution and the prototype model of the motor is presented.
Przegląd Elektrotechniczny, 2014
In the paper a new approach for optimisation and designing an E-I inductor, by using the Taguchi ... more In the paper a new approach for optimisation and designing an E-I inductor, by using the Taguchi Design of Experiments (DoE) technique is presented. The proposed technique is applied on an existing iron core inductor. The target of optimisation is to reduce the total mass of active materials, preferably focussing on copper mass, while the required value of magnetising inductance is kept inside the prescribed bounds. Additional constraints are also considered. The inductor lamination geometry and properties of active materials (iron core and copper wire) are kept the same. The method incorporates application of 3D FEM as virtual design tool, to prove the optimisation results Streszczenie. W artykule przedstawiono nowe podejście w optymalizacji i projektowaniu induktora z rdzeniem E-I przy wykorzystaniu techniki Design of Experiment (zaproponowanej przez Dr. Taguchi. Proponowana technika zastosowana jest dla istniejącego rdzenia induktora. Celem optymalizacji jest redukcja calkowitej ...
This paper looks at performance analysis of PM disc motor for direct electric vehicle drive
Przegląd Elektrotechniczny, 2013
In this paper a particle swarm based optimal design of axial field permanent magnet motor (AFPMM)... more In this paper a particle swarm based optimal design of axial field permanent magnet motor (AFPMM) is proposed. This approach employs a particle-swarm-optimization (PSO) technique to search for optimal design solution of an AFPMM based on the efficiency value of the motor. A comparative analysis of the optimised solution and the prototype is presented and it is based on the values of the optimised objective function, on the values of the optimisation parameters, and on a set of electric and magnetic parameters of the motor. Streszczenie. W artykule opisano wykorzystanie metody optymalizacji roju cząstek w projektowaniu maszyny synchronicznej z magnesami trwalymi o strumieniu osiowym (ang. AFPMM). Dokonano analizy porownawczej wyznaczonych optymalizacji oraz przedstawiono prototyp oparty na wartościach parametrow optymalizacji oraz parametrach elektrycznych i magnetycznych maszyny. (Wykorzystanie metody optymalizacji roju cząstek w zwiekszeniu sprawności maszyny AF-PMSM).
Przegląd Elektrotechniczny, 2014
In this paper the influence of some design parameters on the cogging torque development by a surf... more In this paper the influence of some design parameters on the cogging torque development by a surface mounted permanent magnet motor is investigated. The investigation is focused on the implementation of stator core skewing and dummy slots in the stator teeth and their influence on the cogging torque reduction of the motor. The cogging torque is calculated numerically for the different motor solutions by using finite element method analysis. Streszczenie. W artykule zaprezentowano badania nad wplywem pewnych parametrow projektowych na rozwoj momentow pulsacyjnych powstalych w wyniku zamontowania powierzchniowego magnesu trwalego. Badania skupione są na implementacji rdzenia stojana ze skoszonymi zlobkami i pustymi zlobkami w zebach oraz ich wplywem na redukcje pulsacyjnych momentow w silniku. Moment pulsujący wyznaczany jest numerycznie przy uzyciu metody elementow skonczonych dla roznych rozwiązan silnika. (Modyfikacje topologiczne dla redukcji momentu pulsacyjnego w silniku synchro...
Przegląd Elektrotechniczny, 2012
A variety of techniques exist for reducing the cogging torque of conventional radial flux PM mach... more A variety of techniques exist for reducing the cogging torque of conventional radial flux PM machines. This paper presents an application of two cogging torque minimization techniques in which the permanent magnets are skewed in a conventional manner and the stator slots are closed with soft magnetic composite material. The comparative analysis of the different motor designs regarding the cogging torque is performed by using data from a quasi 3DFEM calculation of the adequately FEM modelled motor solutions. Streszczenie. Istnieją roznorodne sposoby redukcji momentu uzebienia w konwencjonalnych maszynach z magnesem trwalym ze strumieniem promieniowym. Artykul przedstawia zastosowanie dwoch sposobow minimalizacji momentu uzebienia, w ktorych magnesy trwale są skoszone w sposob konwencjonalny a zlobki stojana są zamkniete miekkim kompozytowym materialem magnetycznym. Analiza porownawcza roznych projektow silnika co do momentu uzebienia przedstawiono za pomocą danych z obliczen quasi-3D...
Power Electronics and Drives, 2021
Both permanent magnet brushless DC motors and permanent magnet synchronous motors have attracted ... more Both permanent magnet brushless DC motors and permanent magnet synchronous motors have attracted wide attention and are increasingly used in industrial high-performance applications in recent years. Those motors are known for their good electrical, magnetic and performance characteristics, but there is one parameter known as cogging torque that has a negative influence on the performance characteristics of the motor. This pulsating torque is generated as a result of the interaction between the stator teeth and the permanent magnets. The minimisation of the ripple of this torque in those permanent magnet motors is of great importance and is generally achieved by a special motor design which in the design process involves a variety of many geometrical motor parameters. In this research work, a novel approach will be introduced where two different nature-inspired algorithms, such as genetic algorithm (GA) and cuckoo search (CS) algorithm are used as an optimisation tool, in which the d...
Technology, Knowledge and Learning, 2020
This paper introduces, explains and illustrates real-life application of virtual training tool fo... more This paper introduces, explains and illustrates real-life application of virtual training tool for electrical engineering education. The tool gives users the opportunity to interact with and manipulate 3D models of authentic devices. The users have a possibility to compare structural differences between devices, assemble and disassemble the machines and test them under extreme conditions, all of which would not be possible while working with a real device. The 3D devices are fully operational allowing the users to interact with them on every level, including analysis of impact of supply conditions i.e. modify voltage and frequency of a particular motor and monitor changes in performance while still operating. The main goal of this research was to evaluate effectiveness and educational values of the proposed tool. Early studies and feedback from educators and students prove this tool to be a great assistance to process of education, facilitating knowledge acquisition and providing an...
International Journal of Applied Electromagnetics and Mechanics, 2002
The paper presents a comparison of the magnetic field and magnetic characteristics of a PM disk m... more The paper presents a comparison of the magnetic field and magnetic characteristics of a PM disk motor with laminated magnetic stator open slot core, laminated magnetic stator closed slot core with soft magnetic composite and soft magnetic composite stator core. The data for this analysis is provided by a 2D FEM calculation of the magnetic field. After the proper modelling of the motor a calculation of the magnetic field for no load and current load is performed, for the three models. The results of the magnetic field distribution, air gap flux density distribution and the values of the magnetic and electric parameters for the three models are also presented.
International Journal of Applied Electromagnetics and Mechanics, 2014
ABSTRACT The minimisation of the torque ripple in permanent magnet synchronous motors (PMSM) is g... more ABSTRACT The minimisation of the torque ripple in permanent magnet synchronous motors (PMSM) is generally achieved by a special motor design which in the design process involves a variation of many geometrical motor parameters. In this paper a new approach is introduced where genetic algorithm is used as an optimisation tool where the maximum value of the cogging torque is used as an objective function. Therefore a proper mathematical presentation of the cogging torque for the analysed synchronous motor is developed. Finally the initial motor and the optimised motor model are modelled in FEMM software which is based on finite element method. The cogging torque is analytically and numerically calculated and the results for both models are presented.
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2018
Purpose The purpose of this paper is to perform an optimal design of a single-phase permanent mag... more Purpose The purpose of this paper is to perform an optimal design of a single-phase permanent magnet brushless DC motor (SPBLDCM) by using efficiency of the motor as an objective function. In the design procedure of the motor, a cuckoo search (CS) algorithm is used as an optimization tool. Design/methodology/approach For the purpose of this research work, a computer program for optimal design of electrical machines based on the CS optimization has been developed. Based on the design characteristics of SPBLDCM, some of the motor parameters are chosen to be constant and others variable. A comparative analysis of the initial motor model and the CS model based on the value of the objective function, as well as the values of the optimization parameters, is performed and presented. Findings Based on the comparative data analysis of both motor models, it can be concluded that the main objective of the optimization is realized, and it is achieved by an improvement of the efficiency of the m...
The European Physical Journal Applied Physics
In the paper is presented a step-by-step development of the topology for a novel single phase per... more In the paper is presented a step-by-step development of the topology for a novel single phase permanent magnet (PM) brushless DC (BLDC) motor, aiming to improve its operation with more efficient utilisation of the active materials. The studied motor is based on a generic design, where asymmetrical stator poles and respective shaping of the permanent magnets is applied. Accurate 2D finite element simulations were employed for numerical prototyping of the motor design, until the expected results were obtained. Based on FEA, cogging and static torque waveforms, along with other relevant performance characteristics were determined and examined. The results show that the motor topology, and in particular, the detailed shape of the stator poles has the most important impact on the smooth operation of the single phase BLDC permanent magnet motor.
International Journal of Applied Electromagnetics and Mechanics
In the paper an original approach to efficiency map optimal synthesis is presented. A permanent m... more In the paper an original approach to efficiency map optimal synthesis is presented. A permanent magnet motor, working as controlled AC motor of synchronous type (PMSM), is selected as a case study. The first target of this research is to derive a lumped-parameter model of the motor (low-fidelity model), validated by magnetic field analysis (high-fidelity model). In turn, the end target is these two models application in a cost-effective optimisation procedures, where the goal is to identify the motor geometry maximizing the map area which is encompassed by a prescribed value for the motor efficiency.
International Journal of Applied Electromagnetics and Mechanics
This paper presents a novel approach to the efficiency improvement of permanent magnet synchronou... more This paper presents a novel approach to the efficiency improvement of permanent magnet synchronous motor using gravitational search algorithm as an optimization tool. The gravitational search algorithm (GSA) is a recently developed meta-heuristic optimization algorithm, which so far has proven to be quite suitable for solving power engineering optimization problems. The aim of this research work is to implement this novel optimization algorithm for the efficiency improvement of permanent magnet synchronous motor, where the objective function in the optimization process is the efficiency of the investigated motor. Comparative analysis of the initial and a number of optimized solutions of the motor model is performed.
Проектот опфаќа развој на генетски алоритми и нивна примена за оптимално проектирање на електрома... more Проектот опфаќа развој на генетски алоритми и нивна примена за оптимално проектирање на електромагнетни уред
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2020
Purpose This paper presents the design techniques applied to a novel fractional-slot 6/4 pole per... more Purpose This paper presents the design techniques applied to a novel fractional-slot 6/4 pole permanent magnet brushless direct current (PMBLDC) motor, for cogging torque reduction. The notable feature of this motor is the simplicity of the design and low production cost. The purpose of this paper is to reduce the peak cogging torque of the motor. The focus is put on the stator topology tuning, and a new design for the stator poles is proposed. By determining the optimum stator pole arc length and the best pole shoe thickness, the cogging torque is significantly reduced. This new optimised motor design has been analysed in detail. The validation of the results is documented with respective figures and charts. Design/methodology/approach At the beginning, the design data for the 6/4 pole PMBLDC motor with concentrated three phase windings and asymmetric stator pole arcs is presented. In the study, this motor is taken as a reference model (A0, T0). A full performance finite element an...
This paper presents the optimum design for a double stator, cup rotor machine; a novel type of BL... more This paper presents the optimum design for a double stator, cup rotor machine; a novel type of BLDC PM Machine. The optimization approach is divided into two stages: the first stage is calculating the machine configuration using Matlab, and the second stage is the optimization of the machine using Finite Element Modeling (FEM). Under the design specifications, the machine model will be selected from three pole numbers, namely, 8, 10 and 12 with an appropriate slot number. A double stator brushless DC permanent magnet machine is designed to achieve low cogging torque; high electromagnetic torque and low ripple torque.
2019 19th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering (ISEF), 2019
In this paper the design aspects for fractional slot permanent magnet brushless DC motors (PMBLDC... more In this paper the design aspects for fractional slot permanent magnet brushless DC motors (PMBLDCM) are presented. Fractional slot machines are characterised by a noninteger number of slots per pole per phase. They have an inherently low cogging torque and possess a fault-tolerant capability. The concentrated phase coils, preferably placed on every other tooth with double the numbers of turns for an increased phase inductance, limit short circuit currents and can allow sustained operation under fault conditions. A further design consideration is the use of an irregular distribution of slots, which can enhance a low-to-free cogging torque operation and increased phase inductance. The paper concludes with some practical results from a 3 phase 12 slot 4 pole prototype machine.
7th Symposium on Applied Electromagnetics SAEM`18: Conference Proceedings, 2019
The International Symposium on Applied Electromagnetics is aimed at the presentation of research ... more The International Symposium on Applied Electromagnetics is aimed at the presentation of research work results in various areas of Applied Electromagnetics. The Symposium is devoted to exchanging ideas, presenting achievements and results, providing the forum for researchers and academics. Open and friendly atmosphere, which our conferences are known for, encourages especially young researchers to present their achievements and ideas, even at an early stage of their research work. The Symposium continues the tradition of joint conferences, organised in previous years by the organisers from Macedonia, Poland, Slovenia and Hungary. The symposium is open for participants from all over the world. This year's symposium took place between 17th and 20th June 2018 in Podčetrtek, Slovenia. We would like to thank all the participants for their participation at the International Symposium on Applied Electromagnetics and wish them a successful academic career.
In this paper a particle swarm based optimal design of single-phase permanent magnet brushless DC... more In this paper a particle swarm based optimal design of single-phase permanent magnet brushless DC motor (SPBLDCM) is proposed. This approach employs a particleswarm-optimisation (PSO) technique as a search tool for optimal design solution of a SPBLDCM based on the value of the objective function. The efficiency of the motor is selected as an objective function. Several optimisation solutions are analysed and a best solution is proposed based on the optimisation parameters, as well as other important motor parameters. An overall comparison of the best optimal solution and the prototype model of the motor is presented.
Przegląd Elektrotechniczny, 2014
In the paper a new approach for optimisation and designing an E-I inductor, by using the Taguchi ... more In the paper a new approach for optimisation and designing an E-I inductor, by using the Taguchi Design of Experiments (DoE) technique is presented. The proposed technique is applied on an existing iron core inductor. The target of optimisation is to reduce the total mass of active materials, preferably focussing on copper mass, while the required value of magnetising inductance is kept inside the prescribed bounds. Additional constraints are also considered. The inductor lamination geometry and properties of active materials (iron core and copper wire) are kept the same. The method incorporates application of 3D FEM as virtual design tool, to prove the optimisation results Streszczenie. W artykule przedstawiono nowe podejście w optymalizacji i projektowaniu induktora z rdzeniem E-I przy wykorzystaniu techniki Design of Experiment (zaproponowanej przez Dr. Taguchi. Proponowana technika zastosowana jest dla istniejącego rdzenia induktora. Celem optymalizacji jest redukcja calkowitej ...
This paper looks at performance analysis of PM disc motor for direct electric vehicle drive
Przegląd Elektrotechniczny, 2013
In this paper a particle swarm based optimal design of axial field permanent magnet motor (AFPMM)... more In this paper a particle swarm based optimal design of axial field permanent magnet motor (AFPMM) is proposed. This approach employs a particle-swarm-optimization (PSO) technique to search for optimal design solution of an AFPMM based on the efficiency value of the motor. A comparative analysis of the optimised solution and the prototype is presented and it is based on the values of the optimised objective function, on the values of the optimisation parameters, and on a set of electric and magnetic parameters of the motor. Streszczenie. W artykule opisano wykorzystanie metody optymalizacji roju cząstek w projektowaniu maszyny synchronicznej z magnesami trwalymi o strumieniu osiowym (ang. AFPMM). Dokonano analizy porownawczej wyznaczonych optymalizacji oraz przedstawiono prototyp oparty na wartościach parametrow optymalizacji oraz parametrach elektrycznych i magnetycznych maszyny. (Wykorzystanie metody optymalizacji roju cząstek w zwiekszeniu sprawności maszyny AF-PMSM).
Przegląd Elektrotechniczny, 2014
In this paper the influence of some design parameters on the cogging torque development by a surf... more In this paper the influence of some design parameters on the cogging torque development by a surface mounted permanent magnet motor is investigated. The investigation is focused on the implementation of stator core skewing and dummy slots in the stator teeth and their influence on the cogging torque reduction of the motor. The cogging torque is calculated numerically for the different motor solutions by using finite element method analysis. Streszczenie. W artykule zaprezentowano badania nad wplywem pewnych parametrow projektowych na rozwoj momentow pulsacyjnych powstalych w wyniku zamontowania powierzchniowego magnesu trwalego. Badania skupione są na implementacji rdzenia stojana ze skoszonymi zlobkami i pustymi zlobkami w zebach oraz ich wplywem na redukcje pulsacyjnych momentow w silniku. Moment pulsujący wyznaczany jest numerycznie przy uzyciu metody elementow skonczonych dla roznych rozwiązan silnika. (Modyfikacje topologiczne dla redukcji momentu pulsacyjnego w silniku synchro...
Przegląd Elektrotechniczny, 2012
A variety of techniques exist for reducing the cogging torque of conventional radial flux PM mach... more A variety of techniques exist for reducing the cogging torque of conventional radial flux PM machines. This paper presents an application of two cogging torque minimization techniques in which the permanent magnets are skewed in a conventional manner and the stator slots are closed with soft magnetic composite material. The comparative analysis of the different motor designs regarding the cogging torque is performed by using data from a quasi 3DFEM calculation of the adequately FEM modelled motor solutions. Streszczenie. Istnieją roznorodne sposoby redukcji momentu uzebienia w konwencjonalnych maszynach z magnesem trwalym ze strumieniem promieniowym. Artykul przedstawia zastosowanie dwoch sposobow minimalizacji momentu uzebienia, w ktorych magnesy trwale są skoszone w sposob konwencjonalny a zlobki stojana są zamkniete miekkim kompozytowym materialem magnetycznym. Analiza porownawcza roznych projektow silnika co do momentu uzebienia przedstawiono za pomocą danych z obliczen quasi-3D...
Power Electronics and Drives, 2021
Both permanent magnet brushless DC motors and permanent magnet synchronous motors have attracted ... more Both permanent magnet brushless DC motors and permanent magnet synchronous motors have attracted wide attention and are increasingly used in industrial high-performance applications in recent years. Those motors are known for their good electrical, magnetic and performance characteristics, but there is one parameter known as cogging torque that has a negative influence on the performance characteristics of the motor. This pulsating torque is generated as a result of the interaction between the stator teeth and the permanent magnets. The minimisation of the ripple of this torque in those permanent magnet motors is of great importance and is generally achieved by a special motor design which in the design process involves a variety of many geometrical motor parameters. In this research work, a novel approach will be introduced where two different nature-inspired algorithms, such as genetic algorithm (GA) and cuckoo search (CS) algorithm are used as an optimisation tool, in which the d...
Technology, Knowledge and Learning, 2020
This paper introduces, explains and illustrates real-life application of virtual training tool fo... more This paper introduces, explains and illustrates real-life application of virtual training tool for electrical engineering education. The tool gives users the opportunity to interact with and manipulate 3D models of authentic devices. The users have a possibility to compare structural differences between devices, assemble and disassemble the machines and test them under extreme conditions, all of which would not be possible while working with a real device. The 3D devices are fully operational allowing the users to interact with them on every level, including analysis of impact of supply conditions i.e. modify voltage and frequency of a particular motor and monitor changes in performance while still operating. The main goal of this research was to evaluate effectiveness and educational values of the proposed tool. Early studies and feedback from educators and students prove this tool to be a great assistance to process of education, facilitating knowledge acquisition and providing an...
International Journal of Applied Electromagnetics and Mechanics, 2002
The paper presents a comparison of the magnetic field and magnetic characteristics of a PM disk m... more The paper presents a comparison of the magnetic field and magnetic characteristics of a PM disk motor with laminated magnetic stator open slot core, laminated magnetic stator closed slot core with soft magnetic composite and soft magnetic composite stator core. The data for this analysis is provided by a 2D FEM calculation of the magnetic field. After the proper modelling of the motor a calculation of the magnetic field for no load and current load is performed, for the three models. The results of the magnetic field distribution, air gap flux density distribution and the values of the magnetic and electric parameters for the three models are also presented.
International Journal of Applied Electromagnetics and Mechanics, 2014
ABSTRACT The minimisation of the torque ripple in permanent magnet synchronous motors (PMSM) is g... more ABSTRACT The minimisation of the torque ripple in permanent magnet synchronous motors (PMSM) is generally achieved by a special motor design which in the design process involves a variation of many geometrical motor parameters. In this paper a new approach is introduced where genetic algorithm is used as an optimisation tool where the maximum value of the cogging torque is used as an objective function. Therefore a proper mathematical presentation of the cogging torque for the analysed synchronous motor is developed. Finally the initial motor and the optimised motor model are modelled in FEMM software which is based on finite element method. The cogging torque is analytically and numerically calculated and the results for both models are presented.
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2018
Purpose The purpose of this paper is to perform an optimal design of a single-phase permanent mag... more Purpose The purpose of this paper is to perform an optimal design of a single-phase permanent magnet brushless DC motor (SPBLDCM) by using efficiency of the motor as an objective function. In the design procedure of the motor, a cuckoo search (CS) algorithm is used as an optimization tool. Design/methodology/approach For the purpose of this research work, a computer program for optimal design of electrical machines based on the CS optimization has been developed. Based on the design characteristics of SPBLDCM, some of the motor parameters are chosen to be constant and others variable. A comparative analysis of the initial motor model and the CS model based on the value of the objective function, as well as the values of the optimization parameters, is performed and presented. Findings Based on the comparative data analysis of both motor models, it can be concluded that the main objective of the optimization is realized, and it is achieved by an improvement of the efficiency of the m...