Florin Jurca | Technical University of Cluj-Napoca (original) (raw)

Papers by Florin Jurca

2011 International Conference on Clean Electrical Power (ICCEP), 2011

... Claw-Pole Machine Design and Tests for Small Scale Direct Driven Applications Florin Jurca,Cl... more ... Claw-Pole Machine Design and Tests for Small Scale Direct Driven Applications Florin Jurca,Claudia Mariú, Claudiu Oprea, Daniel Fodorean Technical University of Cluj-Napoca, Department of Electrical Machines, Cluj, Romania 978-1-4244-8930-5/11/$26.00 ©2011 IEEE ...

IET Electric Power Applications, 2012

The present study deals with the theoretical and experimental analysis of a permanent magnet claw... more The present study deals with the theoretical and experimental analysis of a permanent magnet claw-pole synchronous generator (PMCPSG) suited for small rating, direct-driven applications, such as small-scale wind power plants. After the computation of the machine main dimensions using an analytical algorithm, a Hooke-Jeeves optimisation procedure was implemented in order to obtain the optimal geometry of the PMCPSG. The electromagnetic field and static performances are studied, based on three-dimensional finite element analysis. A prototype of the PMCPSG is tested on a test bench for resistive and inductive loads.

— This paper presents a research regarding a special design for a micro-wind turbine that drives ... more — This paper presents a research regarding a special design for a micro-wind turbine that drives a permanent magnet generator with two rotors that spin in opposite directions and recovering the energy by intermediate of brushes-rings system. The aim of this study is to develop and prove the functionality of a two rotors counter rotating permanent magnet generator by comparative results between the finite element field analyses and experimentally obtained.

— In small ratings, direct-driven wind power applications multiple permanent magnet generators ha... more — In small ratings, direct-driven wind power applications multiple permanent magnet generators have become very attractive. Connected directly to the turbine axis, this type of electrical machine contribute to low price energy (the energy loss is diminished through the conversion, the turbine performance is increased) and to the reduction of the noise – this would be a very important aspect in case the turbine is placed nearby the localities. The paper presents the analysis of the magnetic field, using a 3D finite element based software, in a claw-pole permanent magnet synchronous machine for small ratings, direct-driven wind power applications. Airgap magnetic field density distribution and harmonic content will be computed. A study on the influence of the axial length and armature material on the magnetic flux density in the machine will be presented. Figure 1. Stator and rotor topologies for the proposed claw-pole generator

The direct driven generators in wind energy conversion systems avoid the noise, the vibration and... more The direct driven generators in wind energy conversion systems avoid the noise, the vibration and potential risk caused by the gear box resistance. The permanent magnet claw-pole generator, due to its large number of poles, simple and reliable construction, is a competitive variant for a direct driven generator in a wind mill at small and medium power. Such a sample generator is analyzed here based on magnetic field calculations and respectively tests. In the paper a new method to identify the generator parameters based on load characteristics is introduced. Applied on the sample generator designed, constructed and tested the identification procedure proves its accuracy and viability. Index Terms—permanent magnet claw pole synchronous generator, design, 3D magnetic field analysis, experimental analysis.

— the paper presents the performances' analysis for an axial-flux permanent magnet synchronous ma... more — the paper presents the performances' analysis for an axial-flux permanent magnet synchronous machine designed for the propulsion of a special light electric vehicle. The analysis of the studied machine is made analytically and numerically. A special attention will be considered for the torque ripples decrease. The obtained results of the proposed solution will be related to an electric scooter dedicated for people with reduced mobility.

Due to their high efficiency and reliability, permanent magnet synchronous machines are widely us... more Due to their high efficiency and reliability, permanent
magnet synchronous machines are widely used in low speed
direct-driven applications. The present paper deals with the
design and analysis of a special topology of a PMSG suited for
small rating, direct-driven wind turbine. A preliminary design
procedure is presented and the results are introduced in FEM
based software in order to analyze the performances of the
machine. The theoretical approach is validated thought
experimental measurement and methods adopted to improve
energy performance.

— The paper present the analysis of the performances of an electrical machine used for small powe... more — The paper present the analysis of the performances of an electrical machine used for small power automotive application. The electrical machine under study in this paper is a small flux synchronous reluctance machine (SynRM) with 4 poles and 24 slots. The analysis of studied machine will be carried out both analytically and numerically in SPEED program and Flux (2D and skewed solver).

the paper presents an analysis of performances for studied electrical machine designed for the pr... more the paper presents an analysis of performances for studied electrical machine designed for the propulsion of a special electric vehicle. This special vehicle is an electric scooter, usually used by people with physical disabilities. This particular electric scooter can be used by elders as well, offering them greater mobility, since, due to their physical health they are becoming more isolated in society. The electrical machine under study in this paper is axial flux permanent magnet synchronous machine. The analysis of the studied machine will be made analytically, numerically and experimental. The obtained results of the proposed solution will be related to a special electric scooter, powered by a dc motor, bought from the market. Index Terms-permanent magnet synchronous machine with axial flux, small electric vehicle.

– Due to their high efficiency and reliability, permanent magnet synchronous machines are widely ... more – Due to their high efficiency and reliability, permanent magnet synchronous machines are widely used in automotive applications. The present paper deals with the design and analysis of a special topology of a permanent magnet synchronous machine (PMSM) suited for integrated starter-alternator (ISA). A preliminary design procedure is presented and the results are introduced in FEM based software in order to analyze the performances of the machine. Index Terms-machine design, integrated starter alternator permanent magnet machine,

2015 International Conference on Electrical Drives and Power Electronics (EDPE), 2015

The subject of the paper is focused on the analysis of a 30kW switched reluctance machine for pro... more The subject of the paper is focused on the analysis of a 30kW switched reluctance machine for propulsion of electrical vehicle propulsion (EV). The paper details the fundamental steps when developing such an electrical machine, and validates the structure using co-simulation procedures, coupling finite element analysis software (Cedrat Flux2D) with software used to implement the controller (Matlab/Simulink). As the advantages of the SRM are already known, the torque ripples are its main disadvantages. These are reduced as much as possible using a dedicated control strategy, the torque sharing functions (TSF). The solution offered by the paper highlights the possibility of using a cheap, reliable and robust electrical machine for propulsion unit.

2015 International Conference on Electrical Drives and Power Electronics (EDPE), 2015

In the last decade due to their high efficiency and reliability, permanent magnet synchronous mac... more In the last decade due to their high efficiency and reliability, permanent magnet synchronous machine are widely used in automotive applications. There are two main reasons for this trend: the reduction of the fuel consumption and the increase of the travel comfort. In this study we consider the approaches of electromagnetic design of a special topology of permanent synchronous machine (radial flux machine with outer rotor) suited for automotive applications. The study design requires some analytical analysis, followed by a numerical one in order to attain the performances of the proposed machine in all three cases (starter-alternator-booster). A thermal analysis is required in order to determine the thermal requirements for the automotive applications

2011 International Conference on Clean Electrical Power (ICCEP), 2011

The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedi... more The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedicated for electric scooter applications. The electrical machines will be analyzed in order to assure the most suited scooter propulsion. The variety of topology is basically obtained through specific winding configuration and poles/slots ratio. The design results are validated numerically through finite element method. A skewed topology proves the reduction of torque ripples. Also, in order to improve the energetic performances of the studied machines, a unity power-factor control strategy is employed.

2011 International Conference on Clean Electrical Power (ICCEP), 2011

While the exhaustion of carbon based fuels has become a certitude, the use of alternative fuels b... more While the exhaustion of carbon based fuels has become a certitude, the use of alternative fuels became more popular in the last decades. The renewable energy sector emerged, providing an alternative to conventional energies; amongst them the wind and solar energies became extremely popular in the last decades, supplying important parts of the total energy required in countries like Germany or the United States of America. Besides these, the wave energy sector represents a huge, yet unexploited domain, which could prove to be a long time solution for the forthcoming energy shortages.

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT Due to their high efficiency and reliability, permanent magnet synchronous machines are ... more ABSTRACT Due to their high efficiency and reliability, permanent magnet synchronous machines are widely used in automotive applications. The present paper deals with the design and analysis of a special topology of a permanent magnet synchronous machine (PMSM) suited for integrated starter-alternator (ISA). A preliminary design procedure is presented and the results are introduced in FEM based software in order to analyze the performances of the machine.

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT The paper presents an analysis of performances for studied electrical machine designed f... more ABSTRACT The paper presents an analysis of performances for studied electrical machine designed for the propulsion of a special electric vehicle. This special vehicle is an electric scooter, usually used by people with physical disabilities. This particular electric scooter can be used by elders as well, offering them greater mobility, since, due to their physical health they are becoming more isolated in society. The electrical machine under study in this paper is axial flux permanent magnet synchronous machine. The analysis of the studied machine will be made analytically, numerically and experimental. The obtained results of the proposed solution will be related to a special electric scooter, powered by a dc motor, bought from the market.

The XIX International Conference on Electrical Machines - ICEM 2010, 2010

In the perspective of the fossil fuels deposits depletion new energy resources must be developed;... more In the perspective of the fossil fuels deposits depletion new energy resources must be developed; amongst them the renewable energy sector seems to be able to provide a long term solution. Besides the already popular wind, solar or thermal energies, the ocean energy sector offers a virtually infinite energy potential; many solutions for harvesting and converting this energy into usable

2009 International Conference on Clean Electrical Power, 2009

ABSTRACT In small ratings, direct-driven wind power applications multiple permanent magnet genera... more ABSTRACT In small ratings, direct-driven wind power applications multiple permanent magnet generators have become very attractive. Connected directly to the turbine axis, this type of electrical machine contributes to low price energy (the energy loss is diminished through the conversion, the turbine performance is increased) and to the reduction of the noise - this would be a very important aspect in case the turbine is placed nearby the localities. The present paper approached the magnetic field analysis of a claw pole permanent magnet rotor topology for a synchronous machine, suitable for small wind power application, by means of the 3D finite elements method.

2006 12th International Power Electronics and Motion Control Conference, 2006

Virtual laboratories can become important components of the teaching process, because using them ... more Virtual laboratories can become important components of the teaching process, because using them several experiment-oriented problems can be solved easily and also from the distance. Graduates using virtual laboratories will be better trained when they enter the job market. In the paper a laboratory work will be presented having two components: a simulation and an experimental module. Both can be used for the preparation of a real lab and for accessing the real-world experiments. The virtual lab modules can also allow multiple students to remote access the experiments, the multicast data transfer mechanisms and arbitration mechanisms.

2009 International Conference on Clean Electrical Power, 2009

2011 International Conference on Clean Electrical Power (ICCEP), 2011

... Claw-Pole Machine Design and Tests for Small Scale Direct Driven Applications Florin Jurca,Cl... more ... Claw-Pole Machine Design and Tests for Small Scale Direct Driven Applications Florin Jurca,Claudia Mariú, Claudiu Oprea, Daniel Fodorean Technical University of Cluj-Napoca, Department of Electrical Machines, Cluj, Romania 978-1-4244-8930-5/11/$26.00 ©2011 IEEE ...

IET Electric Power Applications, 2012

The present study deals with the theoretical and experimental analysis of a permanent magnet claw... more The present study deals with the theoretical and experimental analysis of a permanent magnet claw-pole synchronous generator (PMCPSG) suited for small rating, direct-driven applications, such as small-scale wind power plants. After the computation of the machine main dimensions using an analytical algorithm, a Hooke-Jeeves optimisation procedure was implemented in order to obtain the optimal geometry of the PMCPSG. The electromagnetic field and static performances are studied, based on three-dimensional finite element analysis. A prototype of the PMCPSG is tested on a test bench for resistive and inductive loads.

— This paper presents a research regarding a special design for a micro-wind turbine that drives ... more — This paper presents a research regarding a special design for a micro-wind turbine that drives a permanent magnet generator with two rotors that spin in opposite directions and recovering the energy by intermediate of brushes-rings system. The aim of this study is to develop and prove the functionality of a two rotors counter rotating permanent magnet generator by comparative results between the finite element field analyses and experimentally obtained.

— In small ratings, direct-driven wind power applications multiple permanent magnet generators ha... more — In small ratings, direct-driven wind power applications multiple permanent magnet generators have become very attractive. Connected directly to the turbine axis, this type of electrical machine contribute to low price energy (the energy loss is diminished through the conversion, the turbine performance is increased) and to the reduction of the noise – this would be a very important aspect in case the turbine is placed nearby the localities. The paper presents the analysis of the magnetic field, using a 3D finite element based software, in a claw-pole permanent magnet synchronous machine for small ratings, direct-driven wind power applications. Airgap magnetic field density distribution and harmonic content will be computed. A study on the influence of the axial length and armature material on the magnetic flux density in the machine will be presented. Figure 1. Stator and rotor topologies for the proposed claw-pole generator

The direct driven generators in wind energy conversion systems avoid the noise, the vibration and... more The direct driven generators in wind energy conversion systems avoid the noise, the vibration and potential risk caused by the gear box resistance. The permanent magnet claw-pole generator, due to its large number of poles, simple and reliable construction, is a competitive variant for a direct driven generator in a wind mill at small and medium power. Such a sample generator is analyzed here based on magnetic field calculations and respectively tests. In the paper a new method to identify the generator parameters based on load characteristics is introduced. Applied on the sample generator designed, constructed and tested the identification procedure proves its accuracy and viability. Index Terms—permanent magnet claw pole synchronous generator, design, 3D magnetic field analysis, experimental analysis.

— the paper presents the performances' analysis for an axial-flux permanent magnet synchronous ma... more — the paper presents the performances' analysis for an axial-flux permanent magnet synchronous machine designed for the propulsion of a special light electric vehicle. The analysis of the studied machine is made analytically and numerically. A special attention will be considered for the torque ripples decrease. The obtained results of the proposed solution will be related to an electric scooter dedicated for people with reduced mobility.

Due to their high efficiency and reliability, permanent magnet synchronous machines are widely us... more Due to their high efficiency and reliability, permanent
magnet synchronous machines are widely used in low speed
direct-driven applications. The present paper deals with the
design and analysis of a special topology of a PMSG suited for
small rating, direct-driven wind turbine. A preliminary design
procedure is presented and the results are introduced in FEM
based software in order to analyze the performances of the
machine. The theoretical approach is validated thought
experimental measurement and methods adopted to improve
energy performance.

— The paper present the analysis of the performances of an electrical machine used for small powe... more — The paper present the analysis of the performances of an electrical machine used for small power automotive application. The electrical machine under study in this paper is a small flux synchronous reluctance machine (SynRM) with 4 poles and 24 slots. The analysis of studied machine will be carried out both analytically and numerically in SPEED program and Flux (2D and skewed solver).

the paper presents an analysis of performances for studied electrical machine designed for the pr... more the paper presents an analysis of performances for studied electrical machine designed for the propulsion of a special electric vehicle. This special vehicle is an electric scooter, usually used by people with physical disabilities. This particular electric scooter can be used by elders as well, offering them greater mobility, since, due to their physical health they are becoming more isolated in society. The electrical machine under study in this paper is axial flux permanent magnet synchronous machine. The analysis of the studied machine will be made analytically, numerically and experimental. The obtained results of the proposed solution will be related to a special electric scooter, powered by a dc motor, bought from the market. Index Terms-permanent magnet synchronous machine with axial flux, small electric vehicle.

– Due to their high efficiency and reliability, permanent magnet synchronous machines are widely ... more – Due to their high efficiency and reliability, permanent magnet synchronous machines are widely used in automotive applications. The present paper deals with the design and analysis of a special topology of a permanent magnet synchronous machine (PMSM) suited for integrated starter-alternator (ISA). A preliminary design procedure is presented and the results are introduced in FEM based software in order to analyze the performances of the machine. Index Terms-machine design, integrated starter alternator permanent magnet machine,

2015 International Conference on Electrical Drives and Power Electronics (EDPE), 2015

The subject of the paper is focused on the analysis of a 30kW switched reluctance machine for pro... more The subject of the paper is focused on the analysis of a 30kW switched reluctance machine for propulsion of electrical vehicle propulsion (EV). The paper details the fundamental steps when developing such an electrical machine, and validates the structure using co-simulation procedures, coupling finite element analysis software (Cedrat Flux2D) with software used to implement the controller (Matlab/Simulink). As the advantages of the SRM are already known, the torque ripples are its main disadvantages. These are reduced as much as possible using a dedicated control strategy, the torque sharing functions (TSF). The solution offered by the paper highlights the possibility of using a cheap, reliable and robust electrical machine for propulsion unit.

2015 International Conference on Electrical Drives and Power Electronics (EDPE), 2015

In the last decade due to their high efficiency and reliability, permanent magnet synchronous mac... more In the last decade due to their high efficiency and reliability, permanent magnet synchronous machine are widely used in automotive applications. There are two main reasons for this trend: the reduction of the fuel consumption and the increase of the travel comfort. In this study we consider the approaches of electromagnetic design of a special topology of permanent synchronous machine (radial flux machine with outer rotor) suited for automotive applications. The study design requires some analytical analysis, followed by a numerical one in order to attain the performances of the proposed machine in all three cases (starter-alternator-booster). A thermal analysis is required in order to determine the thermal requirements for the automotive applications

2011 International Conference on Clean Electrical Power (ICCEP), 2011

The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedi... more The paper presents the study of two permanent magnet synchronous machines, with outer rotor, dedicated for electric scooter applications. The electrical machines will be analyzed in order to assure the most suited scooter propulsion. The variety of topology is basically obtained through specific winding configuration and poles/slots ratio. The design results are validated numerically through finite element method. A skewed topology proves the reduction of torque ripples. Also, in order to improve the energetic performances of the studied machines, a unity power-factor control strategy is employed.

2011 International Conference on Clean Electrical Power (ICCEP), 2011

While the exhaustion of carbon based fuels has become a certitude, the use of alternative fuels b... more While the exhaustion of carbon based fuels has become a certitude, the use of alternative fuels became more popular in the last decades. The renewable energy sector emerged, providing an alternative to conventional energies; amongst them the wind and solar energies became extremely popular in the last decades, supplying important parts of the total energy required in countries like Germany or the United States of America. Besides these, the wave energy sector represents a huge, yet unexploited domain, which could prove to be a long time solution for the forthcoming energy shortages.

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT Due to their high efficiency and reliability, permanent magnet synchronous machines are ... more ABSTRACT Due to their high efficiency and reliability, permanent magnet synchronous machines are widely used in automotive applications. The present paper deals with the design and analysis of a special topology of a permanent magnet synchronous machine (PMSM) suited for integrated starter-alternator (ISA). A preliminary design procedure is presented and the results are introduced in FEM based software in order to analyze the performances of the machine.

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT The paper presents an analysis of performances for studied electrical machine designed f... more ABSTRACT The paper presents an analysis of performances for studied electrical machine designed for the propulsion of a special electric vehicle. This special vehicle is an electric scooter, usually used by people with physical disabilities. This particular electric scooter can be used by elders as well, offering them greater mobility, since, due to their physical health they are becoming more isolated in society. The electrical machine under study in this paper is axial flux permanent magnet synchronous machine. The analysis of the studied machine will be made analytically, numerically and experimental. The obtained results of the proposed solution will be related to a special electric scooter, powered by a dc motor, bought from the market.

The XIX International Conference on Electrical Machines - ICEM 2010, 2010

In the perspective of the fossil fuels deposits depletion new energy resources must be developed;... more In the perspective of the fossil fuels deposits depletion new energy resources must be developed; amongst them the renewable energy sector seems to be able to provide a long term solution. Besides the already popular wind, solar or thermal energies, the ocean energy sector offers a virtually infinite energy potential; many solutions for harvesting and converting this energy into usable

2009 International Conference on Clean Electrical Power, 2009

ABSTRACT In small ratings, direct-driven wind power applications multiple permanent magnet genera... more ABSTRACT In small ratings, direct-driven wind power applications multiple permanent magnet generators have become very attractive. Connected directly to the turbine axis, this type of electrical machine contributes to low price energy (the energy loss is diminished through the conversion, the turbine performance is increased) and to the reduction of the noise - this would be a very important aspect in case the turbine is placed nearby the localities. The present paper approached the magnetic field analysis of a claw pole permanent magnet rotor topology for a synchronous machine, suitable for small wind power application, by means of the 3D finite elements method.

2006 12th International Power Electronics and Motion Control Conference, 2006

Virtual laboratories can become important components of the teaching process, because using them ... more Virtual laboratories can become important components of the teaching process, because using them several experiment-oriented problems can be solved easily and also from the distance. Graduates using virtual laboratories will be better trained when they enter the job market. In the paper a laboratory work will be presented having two components: a simulation and an experimental module. Both can be used for the preparation of a real lab and for accessing the real-world experiments. The virtual lab modules can also allow multiple students to remote access the experiments, the multicast data transfer mechanisms and arbitration mechanisms.

2009 International Conference on Clean Electrical Power, 2009