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Prof. Anouar Belahcen
Department of Electrical Engineering and Automation, Aalto University, Espoo 15500, Finland

Basic Info


Research Keywords & Expertise

0 Electrical Machines
0 Finite element method
0 Magnetic Materials
0 Material Characterization
0 Fault diagnostic

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Electrical Machines
Finite element method
Magnetic Materials
Fault diagnostic

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Short Biography

Anouar Belahcen (M13-SM15) is a professor in computational electromechanics at Aalto University in Finland. His research interests are numerical modeling of electrical machines, magnetic materials characterization and modeling, coupled magneto-mechanical problems, magnetic forces and magnetostriction, iron losses and fault diagnostics of electrical machines. He is a senior member of the IEEE Society and a member of the first Board (AdCom) of the ICEM NPO, which manages the ICEM conferences, and a member of the ICS board, which manages the COMPUMAG conference. Anouar has authored or co-authored more than 90 journal papers and several conference papers, many of which are the result of joint international cooperation, such as with French, German, Austrian, Spanish, Italian, Belgian, Portuguese and Chinese research groups. Besides his work at Aalto University, Anouar has been working as an invited professor at Tallinn University of Technology in Estonia since 2011, where he is teaching subjects related to electrical machines and supervising Ph.D. and postdoc researchers.

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Journal article
Published: 18 August 2021 in IEEE Access
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Iron losses in laser-cut toroidal samples of 12 mm thick steel laminations used in large synchronous motors are studied. Eddy currents in the lamination cross-section are solved with the 2-D finite element method while applying a constitutive law based on the Jiles-Atherton hysteresis model. The effect of cutting on the material properties is included by a continuous local material model approach, which enables to express the material properties as a function of distance from the cutting edge. The accuracy of the model is validated by comparing the simulations and experimental measurements of five toroidal samples assembled from concentric rings with different widths. Highly accurate results are obtained in terms of both the matching of B-H loops and the total loss values with an average relative error less than 2.9%. The results show that the hysteresis loss under quasi-static excitation increases up to 20.4% due to the effect of cutting. It is observed that the eddy-current loss becomes dominant over the hysteresis loss even at 5 Hz, and this eddy-current loss decreases up to 72.5% as the number of concentric rings increases. The presented model and the results accurately show how iron losses occur in thick materials and how they are affected by the cutting process.

ACS Style

Ismet Tuna Gurbuz; Paavo Rasilo; Floran Martin; Ugur Aydin; Osaruyi Osemwinyen; Ahamed Bilal Asaf Ali; Marta Chamosa; Anouar Belahcen. Finite-Element Modeling and Characterization of Iron Losses in 12 mm Thick Steel Laminations Including the Effect of Cutting. IEEE Access 2021, 9, 115710 -115718.

AMA Style

Ismet Tuna Gurbuz, Paavo Rasilo, Floran Martin, Ugur Aydin, Osaruyi Osemwinyen, Ahamed Bilal Asaf Ali, Marta Chamosa, Anouar Belahcen. Finite-Element Modeling and Characterization of Iron Losses in 12 mm Thick Steel Laminations Including the Effect of Cutting. IEEE Access. 2021; 9 ():115710-115718.

Chicago/Turabian Style

Ismet Tuna Gurbuz; Paavo Rasilo; Floran Martin; Ugur Aydin; Osaruyi Osemwinyen; Ahamed Bilal Asaf Ali; Marta Chamosa; Anouar Belahcen. 2021. "Finite-Element Modeling and Characterization of Iron Losses in 12 mm Thick Steel Laminations Including the Effect of Cutting." IEEE Access 9, no. : 115710-115718.

Journal article
Published: 17 August 2021 in Energies
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This paper proposes a new surrogate optimization routine for optimal design of a direct on line (DOL) squirrel cage induction motor. The geometry of the motor is optimized to maximize its electromagnetic efficiency while respecting the constraints, such as output power and power factor. The routine uses the methodologies of Latin-hypercube sampling, a clustering technique and a Box–Behnken design for improving the accuracy of the surrogate model while efficiently utilizing the computational resources. The global search-based particle swarm optimization (PSO) algorithm is used for optimizing the surrogate model and the pattern search algorithm is used for fine-tuning the surrogate optimal solution. The proposed surrogate optimization routine achieved an optimal design with an electromagnetic efficiency of 93.90%, for a 7.5 kW motor. To benchmark the performance of the surrogate optimization routine, a comparative analysis was carried out with a direct optimization routine that uses a finite element method (FEM)-based machine model as a cost function.

ACS Style

Aswin Balasubramanian; Floran Martin; Masum Billah; Osaruyi Osemwinyen; Anouar Belahcen. Application of Surrogate Optimization Routine with Clustering Technique for Optimal Design of an Induction Motor. Energies 2021, 14, 5042 .

AMA Style

Aswin Balasubramanian, Floran Martin, Masum Billah, Osaruyi Osemwinyen, Anouar Belahcen. Application of Surrogate Optimization Routine with Clustering Technique for Optimal Design of an Induction Motor. Energies. 2021; 14 (16):5042.

Chicago/Turabian Style

Aswin Balasubramanian; Floran Martin; Masum Billah; Osaruyi Osemwinyen; Anouar Belahcen. 2021. "Application of Surrogate Optimization Routine with Clustering Technique for Optimal Design of an Induction Motor." Energies 14, no. 16: 5042.

Journal article
Published: 18 June 2021 in Machines
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This paper presents the analytical calculation of the heat transfer coefficient of a complex housing shape of a Totally Enclosed Fan-Cooled (TEFC) industrial machine when it works below 20% of its nominal speed or close to stall. Therefore, passive cooling is dominant, and most of the heat is extracted by the combination of natural convection and radiation phenomena. Under these conditions, the area-based composite approach was used for the development of the analytical calculation method. A test rig using a TEFC Synchronous Reluctance Motor (SynRM) was constructed, and the collected experimental data was used to validate the proposed analytical method successfully.

ACS Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio Cardoso; Anouar Belahcen; Toomas Vaimann; Bilal Asad; Hans Tiismus. Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling. Machines 2021, 9, 120 .

AMA Style

Payam Shams Ghahfarokhi, Andrejs Podgornovs, Ants Kallaste, Antonio Cardoso, Anouar Belahcen, Toomas Vaimann, Bilal Asad, Hans Tiismus. Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling. Machines. 2021; 9 (6):120.

Chicago/Turabian Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio Cardoso; Anouar Belahcen; Toomas Vaimann; Bilal Asad; Hans Tiismus. 2021. "Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling." Machines 9, no. 6: 120.

Journal article
Published: 03 June 2021 in Energies
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Additive manufacturing of ferromagnetic materials for electrical machine applications is maturing. In this work, a full E-type transformer core is printed, characterized, and compared in terms of performance with a conventional Goss textured core. For facilitating a modular winding and eddy current loss reduction, the 3D printed core is assembled from four novel interlocking components, which structurally imitate the E-type core laminations. Both cores are compared at approximately their respective optimal working conditions, at identical magnetizing currents. Due to the superior magnetic properties of the Goss sheet conventional transformer core, 10% reduced efficiency (from 80.5% to 70.1%) and 34% lower power density (from 59 VA/kg to 39 VA/kg) of the printed transformer are identified at operating temperature. The first prototype transformer core demonstrates the state of the art and initial optimization step for further development of additively manufactured soft ferromagnetic components. Further optimization of both the 3D printed material and core design are proposed for obtaining higher electrical performance for AC applications.

ACS Style

Hans Tiismus; Ants Kallaste; Anouar Belahcen; Anton Rassolkin; Toomas Vaimann; Payam Shams Ghahfarokhi. Additive Manufacturing and Performance of E-Type Transformer Core. Energies 2021, 14, 3278 .

AMA Style

Hans Tiismus, Ants Kallaste, Anouar Belahcen, Anton Rassolkin, Toomas Vaimann, Payam Shams Ghahfarokhi. Additive Manufacturing and Performance of E-Type Transformer Core. Energies. 2021; 14 (11):3278.

Chicago/Turabian Style

Hans Tiismus; Ants Kallaste; Anouar Belahcen; Anton Rassolkin; Toomas Vaimann; Payam Shams Ghahfarokhi. 2021. "Additive Manufacturing and Performance of E-Type Transformer Core." Energies 14, no. 11: 3278.

Journal article
Published: 29 April 2021 in IEEE Access
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In the above article [1] , Figs. 3 and 19 are modified versions of Fig. 18 from the article. Although this source was cited in our article as [6], the captions for these figures are missing the appropriate citation/reference.

ACS Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio J. Marques Cardoso; Anouar Belahcen; Toomas Vaimann; Hans Tiismus; Bilal Asad. Corrections to “Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines”. IEEE Access 2021, 9, 62532 -62532.

AMA Style

Payam Shams Ghahfarokhi, Andrejs Podgornovs, Ants Kallaste, Antonio J. Marques Cardoso, Anouar Belahcen, Toomas Vaimann, Hans Tiismus, Bilal Asad. Corrections to “Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines”. IEEE Access. 2021; 9 ():62532-62532.

Chicago/Turabian Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio J. Marques Cardoso; Anouar Belahcen; Toomas Vaimann; Hans Tiismus; Bilal Asad. 2021. "Corrections to “Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines”." IEEE Access 9, no. : 62532-62532.

Journal article
Published: 14 April 2021 in Electronics
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This paper proposes a modified dynamic equivalent circuit model for a linear induction motor considering both longitudinal end effect and transverse edge effect. The dynamic end effect (speed-dependent end effect) is based on conventional Duncan’s approach. The transverse edge effect is investigated by using three correction factors applied to the secondary resistance and magnetizing inductance. Moreover, the iron saturation effect, the skin effect, and the air-gap leakage effect are incorporated into the proposed model by using the field-analysis method. A new topology of the steady-state and space-vector model of linear induction, regarding all mentioned phenomena, is presented. The parameters of this model are calculated using both field analysis and the finite-element method. The steady-state performance of the model is first validated using the finite-element method. Additionally, the dynamic performance of the proposed model is studied. The results prove that the proposed equivalent circuit model can precisely predict the dynamic and steady-state performances of the linear induction.

ACS Style

Hamidreza Heidari; Anton Rassõlkin; Arash Razzaghi; Toomas Vaimann; Ants Kallaste; Ekaterina Andriushchenko; Anouar Belahcen; Dmitry Lukichev. A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects. Electronics 2021, 10, 933 .

AMA Style

Hamidreza Heidari, Anton Rassõlkin, Arash Razzaghi, Toomas Vaimann, Ants Kallaste, Ekaterina Andriushchenko, Anouar Belahcen, Dmitry Lukichev. A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects. Electronics. 2021; 10 (8):933.

Chicago/Turabian Style

Hamidreza Heidari; Anton Rassõlkin; Arash Razzaghi; Toomas Vaimann; Ants Kallaste; Ekaterina Andriushchenko; Anouar Belahcen; Dmitry Lukichev. 2021. "A Modified Dynamic Model of Single-Sided Linear Induction Motors Considering Longitudinal and Transversal Effects." Electronics 10, no. 8: 933.

Journal article
Published: 08 April 2021 in IEEE Transactions on Magnetics
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Devices fabricated from Soft Magnetic Composites (SMCs) are gaining popularity in research and application. The multiscale characteristics require special attention. Solving the quasi-statics Maxwell’s equations on such devices consumes huge time and memory if the granular scale of SMCs is resolved. We have proposed a Localized Orthogonal Decomposition (LOD) homogenization strategy which allows us to compute the problem on a middle scale while retrieving the material dimension. The LOD projector has a localization property so that it can be accurately approximated on a local patch. In this work, we explore the localization characteristic further to show that the projector can be reused at different time steps. The requirement for computational time and memory can be greatly reduced. A numerical example in two dimensions is provided to show the feasibility and advantage of this approach. This technique is applied to a domain of SMCs with randomly distributed polygon-shaped granules. Finally, error analysis is provided to show the validation of the LOD projector.

ACS Style

Xiaotao Ren; Antti Hannukainen; Anouar Belahcen; Yves Perriard. LOD Homogenization of Multiscale Eddy Current Problem in Time Domain. IEEE Transactions on Magnetics 2021, 57, 1 -4.

AMA Style

Xiaotao Ren, Antti Hannukainen, Anouar Belahcen, Yves Perriard. LOD Homogenization of Multiscale Eddy Current Problem in Time Domain. IEEE Transactions on Magnetics. 2021; 57 (6):1-4.

Chicago/Turabian Style

Xiaotao Ren; Antti Hannukainen; Anouar Belahcen; Yves Perriard. 2021. "LOD Homogenization of Multiscale Eddy Current Problem in Time Domain." IEEE Transactions on Magnetics 57, no. 6: 1-4.

Journal article
Published: 21 March 2021 in Applied Sciences
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This paper presents the modeling and the broken rotor bar fault diagnostics by time–frequency analysis of the motor current under an extended startup transient time. The transient current-based nonstationary signal is retrieved and investigated for its time–frequency response to segregate the rotor faults and spatial harmonics. For studying the effect of reduced voltage on various parameters and the theoretical definition of the fault patterns, the winding function analysis (WFA)-based model is presented first. Moreover, an algorithm to improve the spectrum legibility is proposed. It is shown that by efficient utilization of the attenuation filter and consideration of the area containing the maximum power spectral density, the diagnostic algorithm gives promising results. The results are based on the machine’s analytical model and the measurements taken from the laboratory setup.

ACS Style

Bilal Asad; Toomas Vaimann; Anouar Belahcen; Ants Kallaste; Anton Rassõlkin; Payam Ghafarokhi; Karolina Kudelina. Transient Modeling and Recovery of Non-Stationary Fault Signature for Condition Monitoring of Induction Motors. Applied Sciences 2021, 11, 2806 .

AMA Style

Bilal Asad, Toomas Vaimann, Anouar Belahcen, Ants Kallaste, Anton Rassõlkin, Payam Ghafarokhi, Karolina Kudelina. Transient Modeling and Recovery of Non-Stationary Fault Signature for Condition Monitoring of Induction Motors. Applied Sciences. 2021; 11 (6):2806.

Chicago/Turabian Style

Bilal Asad; Toomas Vaimann; Anouar Belahcen; Ants Kallaste; Anton Rassõlkin; Payam Ghafarokhi; Karolina Kudelina. 2021. "Transient Modeling and Recovery of Non-Stationary Fault Signature for Condition Monitoring of Induction Motors." Applied Sciences 11, no. 6: 2806.

Journal article
Published: 09 March 2021 in Periodica Polytechnica Electrical Engineering and Computer Science
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So far, Permanent Magnet (PM) clutches have been broadly used as torque transmission devices. With the aim of effective utilization of materials and energy in the manufacturing of PM clutches, design optimization has been widely applied. Generally, PM clutches are optimized applying linear dimensions as optimization parameters. On the contrary, optimization of PM clutch shapes has not been done extensively. Therefore, this paper performs optimization of PM clutch shapes with the following objectives: maximum tangential attraction force and minimum volume of utilized materials. To form optimal shapes, the points on the clutch surface are chosen as optimization parameters. The optimization is carried out using Ārtap framework in connection with COMSOL software, where the 3D model of the clutch has been created. After the optimization, the tangential attraction force has increased by 13 % and the volume of the clutch has been reduced by 24 %. Although the obtained shapes appear to be highly intricate, it does not pose an obstacle for modern manufacturing techniques.

ACS Style

Ekaterina Andriushchenko; Jan Kaska; Ants Kallaste; Anouar Belahcen; Toomas Vaimann; Anton Rassõlkin. Design Optimization of Permanent Magnet Clutch with Ārtap Framework. Periodica Polytechnica Electrical Engineering and Computer Science 2021, 65, 106 -112.

AMA Style

Ekaterina Andriushchenko, Jan Kaska, Ants Kallaste, Anouar Belahcen, Toomas Vaimann, Anton Rassõlkin. Design Optimization of Permanent Magnet Clutch with Ārtap Framework. Periodica Polytechnica Electrical Engineering and Computer Science. 2021; 65 (2):106-112.

Chicago/Turabian Style

Ekaterina Andriushchenko; Jan Kaska; Ants Kallaste; Anouar Belahcen; Toomas Vaimann; Anton Rassõlkin. 2021. "Design Optimization of Permanent Magnet Clutch with Ārtap Framework." Periodica Polytechnica Electrical Engineering and Computer Science 65, no. 2: 106-112.

Journal article
Published: 26 February 2021 in IEEE Access
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The additive manufacturing approach is considered a new manufacturing technology method and is evolving dynamically in recent years. It is advancing and achieving as the key enabling technology in a wide range of applications, from medical sciences to the aerospace and automotive industries. This novel approach opens a new path to overcome the conventional manufacturing problems and challenges by providing more design freedom, new ranges of materials, lightweight and complex geometries. According to demands metrics such as lightweight and high power density motors. This offers clear motivation to develop the advanced thermal management method with new materials and a novel additive manufacturing (AM) approach. The paper aims to provide a comprehensive review of all the attempts in various electrical machines' thermal management methods using AM method. It considers the opportunities and challenges that designers are facing while implementing these approaches. Finally, the authors make some comments/forecasts on how the AM could improve the performance and manufacturability of the future thermal management system of electrical machines.

ACS Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio J. Marques Cardoso; Anouar Belahcen; Toomas Vaimann; Hans Tiismus; Bilal Asad. Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines. IEEE Access 2021, 9, 36368 -36381.

AMA Style

Payam Shams Ghahfarokhi, Andrejs Podgornovs, Ants Kallaste, Antonio J. Marques Cardoso, Anouar Belahcen, Toomas Vaimann, Hans Tiismus, Bilal Asad. Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines. IEEE Access. 2021; 9 ():36368-36381.

Chicago/Turabian Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Antonio J. Marques Cardoso; Anouar Belahcen; Toomas Vaimann; Hans Tiismus; Bilal Asad. 2021. "Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines." IEEE Access 9, no. : 36368-36381.

Journal article
Published: 24 February 2021 in Energies
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Additively manufactured soft magnetic Fe-3.7%w.t.Si toroidal samples with solid and novel partitioned cross-sectional geometries are characterized through magnetic measurements. This study focuses on the effect of air gaps and annealing temperature on AC core losses at the 50 Hz frequency. In addition, DC electromagnetic material properties are presented, showing comparable results to conventional and other 3D-printed, high-grade, soft magnetic materials. The magnetization of 1.5 T was achieved at 1800 A/m, exhibiting a maximum relative permeability of 28,900 and hysteresis losses of 0.61 (1 T) and 1.7 (1.5 T) W/kg. A clear trend of total core loss reduction at 50 Hz was observed in relation to the segregation of the specimen cross-sectional topology. The lowest 50 Hz total core losses were measured for the toroidal specimen with four internal air gaps annealed at 1200 °C, exhibiting a total core loss of 1.2 (1 T) and 5.5 (1.5 T) W/kg. This is equal to an 860% total core loss reduction at 1 T and a 510% loss reduction at 1.5 T magnetization compared to solid bulk-printed material. Based on the findings, the advantages and disadvantages of printed air-gapped material internal structures are discussed in detail.

ACS Style

Hans Tiismus; Ants Kallaste; Anouar Belahcen; Marek Tarraste; Toomas Vaimann; Anton Rassõlkin; Bilal Asad; Payam Shams Ghahfarokhi. AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines. Energies 2021, 14, 1241 .

AMA Style

Hans Tiismus, Ants Kallaste, Anouar Belahcen, Marek Tarraste, Toomas Vaimann, Anton Rassõlkin, Bilal Asad, Payam Shams Ghahfarokhi. AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines. Energies. 2021; 14 (5):1241.

Chicago/Turabian Style

Hans Tiismus; Ants Kallaste; Anouar Belahcen; Marek Tarraste; Toomas Vaimann; Anton Rassõlkin; Bilal Asad; Payam Shams Ghahfarokhi. 2021. "AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines." Energies 14, no. 5: 1241.

Journal article
Published: 20 February 2021 in Electronics
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In recent decades, the genetic algorithm (GA) has been extensively used in the design optimization of electromagnetic devices. Despite the great merits possessed by the GA, its processing procedure is highly time-consuming. On the contrary, the widely applied Taguchi optimization method is faster with comparable effectiveness in certain optimization problems. This study explores the abilities of both methods within the optimization of a permanent magnet coupling, where the optimization objectives are the minimization of coupling volume and maximization of transmitted torque. The optimal geometry of the coupling and the obtained characteristics achieved by both methods are nearly identical. The magnetic torque density is enhanced by more than 20%, while the volume is reduced by 17%. Yet, the Taguchi method is found to be more time-efficient and effective within the considered optimization problem. Thanks to the additive manufacturing techniques, the initial design and the sophisticated geometry of the Taguchi optimal designs are precisely fabricated. The performances of the coupling designs are validated using an experimental setup.

ACS Style

Ekaterina Andriushchenko; Ants Kallaste; Anouar Belahcen; Toomas Vaimann; Anton Rassõlkin; Hamidreza Heidari; Hans Tiismus. Optimization of a 3D-Printed Permanent Magnet Coupling Using Genetic Algorithm and Taguchi Method. Electronics 2021, 10, 494 .

AMA Style

Ekaterina Andriushchenko, Ants Kallaste, Anouar Belahcen, Toomas Vaimann, Anton Rassõlkin, Hamidreza Heidari, Hans Tiismus. Optimization of a 3D-Printed Permanent Magnet Coupling Using Genetic Algorithm and Taguchi Method. Electronics. 2021; 10 (4):494.

Chicago/Turabian Style

Ekaterina Andriushchenko; Ants Kallaste; Anouar Belahcen; Toomas Vaimann; Anton Rassõlkin; Hamidreza Heidari; Hans Tiismus. 2021. "Optimization of a 3D-Printed Permanent Magnet Coupling Using Genetic Algorithm and Taguchi Method." Electronics 10, no. 4: 494.

Journal article
Published: 09 February 2021 in IEEE Transactions on Magnetics
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In this paper, a finite element (FE) modeling of the punching effect on the magnetic properties of electrical steel sheet is carried out. For that, the modified anhysteretic Sablik model is applied together with the plastic strain distribution obtained from a punching process simulation performed using the software ABAQUS. First, a synchronous electrical machine is simulated including the effect of the punching process, it shows the degradation of the magnetic flux density at the lamination edges and an increase of the iron losses. Then, results obtained from the magneto-mechanical simulation are investigated in terms of the method used to implement the plastic strain distribution in the FE computation. Two examples have been investigated: a square steel sheet and a tooth of an electrical machine.

ACS Style

N. M'Zali; T. Henneron; A. Benabou; F. Martin; A. Belahcen. Finite Element Analysis of the Magneto-Mechanical Coupling Due to Punching Process in Electrical Steel Sheet. IEEE Transactions on Magnetics 2021, 57, 1 -4.

AMA Style

N. M'Zali, T. Henneron, A. Benabou, F. Martin, A. Belahcen. Finite Element Analysis of the Magneto-Mechanical Coupling Due to Punching Process in Electrical Steel Sheet. IEEE Transactions on Magnetics. 2021; 57 (6):1-4.

Chicago/Turabian Style

N. M'Zali; T. Henneron; A. Benabou; F. Martin; A. Belahcen. 2021. "Finite Element Analysis of the Magneto-Mechanical Coupling Due to Punching Process in Electrical Steel Sheet." IEEE Transactions on Magnetics 57, no. 6: 1-4.

Journal article
Published: 29 January 2021 in Journal of Magnetism and Magnetic Materials
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In this paper, the vector extension of the Jiles-Atherton hysteresis model is modified to predict both alternating and rotational field strength variations observed in a nonoriented silicon steel sheet. The model parameters are changed to be functions of the magnitude and direction of flux density, and the anhysteretic magnetic characteristics are identified from several unidirectional alternating B(H)measurements. We demonstrate that the modified vector Jiles-Atherton model can predict both alternating and rotational field strength variations with better accuracy than the “basic” approach.

ACS Style

Brijesh Upadhaya; Paavo Rasilo; Lauri Perkkiö; Paul Handgruber; Abdelkader Benabou; Anouar Belahcen; Antero Arkkio. Alternating and rotational loss prediction accuracy of vector Jiles-Atherton model. Journal of Magnetism and Magnetic Materials 2021, 527, 167690 .

AMA Style

Brijesh Upadhaya, Paavo Rasilo, Lauri Perkkiö, Paul Handgruber, Abdelkader Benabou, Anouar Belahcen, Antero Arkkio. Alternating and rotational loss prediction accuracy of vector Jiles-Atherton model. Journal of Magnetism and Magnetic Materials. 2021; 527 ():167690.

Chicago/Turabian Style

Brijesh Upadhaya; Paavo Rasilo; Lauri Perkkiö; Paul Handgruber; Abdelkader Benabou; Anouar Belahcen; Antero Arkkio. 2021. "Alternating and rotational loss prediction accuracy of vector Jiles-Atherton model." Journal of Magnetism and Magnetic Materials 527, no. : 167690.

Conference paper
Published: 27 January 2021 in 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED)
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This paper presents a survey about implementing hairpin winding with an oil spray cooling system on the new generation of electrical vehicle (EV) motors as an option to produce high power density, high efficiency, cost-effectiveness, lightweight, reliable EV motors. It provides the advantages and drawbacks of this rectangular winding compared to random winding and considers the hairpin winding production aspects. According to the high AC losses of this configuration, the paper considers two conventional approaches for calculating these losses with their advantages and drawback. Then it proposes the novel hybrid FEA method for calculating the AC copper losses to overcome the weaknesses of analytical and numerical methods. Finally, it provides a holistic view related to the oil spray cooling of the electrical machine and points the future work associated with this cooling method

ACS Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Toomas Vaimann; Anouar Belahcen; Antonio J. Marques Cardoso. Oil Spray Cooling with Hairpin Windings in High-Performance Electric Vehicle Motors. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) 2021, 1 -5.

AMA Style

Payam Shams Ghahfarokhi, Andrejs Podgornovs, Ants Kallaste, Toomas Vaimann, Anouar Belahcen, Antonio J. Marques Cardoso. Oil Spray Cooling with Hairpin Windings in High-Performance Electric Vehicle Motors. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED). 2021; ():1-5.

Chicago/Turabian Style

Payam Shams Ghahfarokhi; Andrejs Podgornovs; Ants Kallaste; Toomas Vaimann; Anouar Belahcen; Antonio J. Marques Cardoso. 2021. "Oil Spray Cooling with Hairpin Windings in High-Performance Electric Vehicle Motors." 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) , no. : 1-5.

Conference paper
Published: 27 January 2021 in 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED)
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The fast-evolving additive manufacturing (AM) technologies are considered vital for the next industrial revolution as it is capable for cost-effective production of highly customizable complex components. Its freeform design and fabrication flexibility also suggest the production of embedded electromechanical components or even electrical machines with enhanced performance. Presently, due to the maturity of single-material additive manufacturing methods, prototyping of 3D printed electrical machines has taken the path of printing and assembling of individual highperformance machine components. This paper describes the design, the printing, the post-processing, the assembly and the controller of a printed prototype 4/6 axial flux switched reluctance electrical machine. The machine components were fabricated with selective laser melting system from 3 % silicon steel in a total print time of 57 hours. Commercially available bearings and conventional copper windings were added as part of the assembly.

ACS Style

Hans Tiismus; Ants Kallaste; Toomas Vaimann; Anton Rassolkin; Anouar Belahcen. Additive Manufacturing of Prototype Axial Flux Switched Reluctance Electrical Machine. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) 2021, 1 -4.

AMA Style

Hans Tiismus, Ants Kallaste, Toomas Vaimann, Anton Rassolkin, Anouar Belahcen. Additive Manufacturing of Prototype Axial Flux Switched Reluctance Electrical Machine. 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED). 2021; ():1-4.

Chicago/Turabian Style

Hans Tiismus; Ants Kallaste; Toomas Vaimann; Anton Rassolkin; Anouar Belahcen. 2021. "Additive Manufacturing of Prototype Axial Flux Switched Reluctance Electrical Machine." 2021 28th International Workshop on Electric Drives: Improving Reliability of Electric Drives (IWED) , no. : 1-4.

Review
Published: 13 January 2021 in Sustainability
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Recent studies show that synchronous reluctance motors (SynRMs) present promising technologies. As a result, research on trending SynRMs drive systems has expanded. This work disseminates the recent developments of design, modeling, and more specifically, control of these motors. Firstly, a brief study of the dominant motor technologies compared to SynRMs is carried out. Secondly, the most prominent motor control methods are studied and classified, which can come in handy for researchers and industries to opt for a proper control method for motor drive systems. Finally, the control strategies for different speed regions of SynRM are studied and the transitions between trajectories are analyzed.

ACS Style

Hamidreza Heidari; Anton Rassõlkin; Ants Kallaste; Toomas Vaimann; Ekaterina Andriushchenko; Anouar Belahcen; Dmitry Lukichev. A Review of Synchronous Reluctance Motor-Drive Advancements. Sustainability 2021, 13, 729 .

AMA Style

Hamidreza Heidari, Anton Rassõlkin, Ants Kallaste, Toomas Vaimann, Ekaterina Andriushchenko, Anouar Belahcen, Dmitry Lukichev. A Review of Synchronous Reluctance Motor-Drive Advancements. Sustainability. 2021; 13 (2):729.

Chicago/Turabian Style

Hamidreza Heidari; Anton Rassõlkin; Ants Kallaste; Toomas Vaimann; Ekaterina Andriushchenko; Anouar Belahcen; Dmitry Lukichev. 2021. "A Review of Synchronous Reluctance Motor-Drive Advancements." Sustainability 13, no. 2: 729.

Journal article
Published: 06 January 2021 in Energies
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This paper presents an algorithm to remove the DC drift from the B-H curve of an additively manufactured soft ferromagnetic material. The removal of DC drift from the magnetization curve is crucial for the accurate estimation of iron losses. The algorithm is based on the sliding mean value subtraction from each cycle of calculated magnetic flux density (B) signal. The sliding mean values (SMVs) are calculated using the convolution theorem, where a DC kernel with a length equal to the size of one cycle is convolved with B to recover the drifting signal. The results are based on the toroid measurements made by selective laser melting (SLM)-based 3D printing mechanism. The measurements taken at different flux density values show the effectiveness of the method.

ACS Style

Bilal Asad; Hans Tiismus; Toomas Vaimann; Anouar Belahcen; Ants Kallaste; Anton Rassõlkin; Payam Shams Ghafarokhi. Sliding Mean Value Subtraction-Based DC Drift Correction of B-H Curve for 3D-Printed Magnetic Materials. Energies 2021, 14, 284 .

AMA Style

Bilal Asad, Hans Tiismus, Toomas Vaimann, Anouar Belahcen, Ants Kallaste, Anton Rassõlkin, Payam Shams Ghafarokhi. Sliding Mean Value Subtraction-Based DC Drift Correction of B-H Curve for 3D-Printed Magnetic Materials. Energies. 2021; 14 (2):284.

Chicago/Turabian Style

Bilal Asad; Hans Tiismus; Toomas Vaimann; Anouar Belahcen; Ants Kallaste; Anton Rassõlkin; Payam Shams Ghafarokhi. 2021. "Sliding Mean Value Subtraction-Based DC Drift Correction of B-H Curve for 3D-Printed Magnetic Materials." Energies 14, no. 2: 284.

Journal article
Published: 02 December 2020 in IEEE Transactions on Magnetics
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A bearingless machine should be designed to maximize the average and to minimize the ripple in the electromagnetic torque and levitating force. In a bearingless synchronous reluctance machine (BSynRM), the complex rotor design and the levitation winding create a rich spatial and temporal spectrum of the magnetic flux density in the airgap, which affects both the torque and force ripple. In this paper, a novel method is introduced to compute the electromagnetic forces from the spatial harmonics of the airgap flux density. A new indexing method is introduced to classify the spatial harmonic wavenumbers and temporal harmonic frequencies of the flux density in the electromagnetic force. The proposed model enables the understanding of the spatial harmonic footprint on the temporal frequencies of the electromagnetic force ripple. The study is carried out through finite element simulations, which are verified by prototype measurements.

ACS Style

Victor Mukherjee; Paavo Rasilo; Floran Martin; Anouar Belahcen. Analysis of Electromagnetic Force Ripple in a Bearingless Synchronous Reluctance Motor. IEEE Transactions on Magnetics 2020, 57, 1 -8.

AMA Style

Victor Mukherjee, Paavo Rasilo, Floran Martin, Anouar Belahcen. Analysis of Electromagnetic Force Ripple in a Bearingless Synchronous Reluctance Motor. IEEE Transactions on Magnetics. 2020; 57 (2):1-8.

Chicago/Turabian Style

Victor Mukherjee; Paavo Rasilo; Floran Martin; Anouar Belahcen. 2020. "Analysis of Electromagnetic Force Ripple in a Bearingless Synchronous Reluctance Motor." IEEE Transactions on Magnetics 57, no. 2: 1-8.

Original paper
Published: 10 November 2020 in Electrical Engineering
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This paper proposes the analytical calculation of the heat transfer coefficient from the housing of a totally enclosed fan cooled (TEFC) machine during the active cooling. A particular focus is on the calculation of the heat transfer coefficient from the machine’s housing for different fan rotational speeds. The paper describes the challenges and provides solutions to dominate them during the analytical calculation of the heat transfer coefficient a TEFC electrical machine. Finally, the proposed method is validated experimentally on a totally enclosed fan cooled synchronous reluctance motor, and good correspondence between the analytical and experimental results is obtained.

ACS Style

Payam Shams Ghahfarokhi; Ants Kallaste; Andrejs Podgornovs; Anouar Belahcen; Toomas Vaimann; Bilal Asad. Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor. Electrical Engineering 2020, 103, 1009 -1017.

AMA Style

Payam Shams Ghahfarokhi, Ants Kallaste, Andrejs Podgornovs, Anouar Belahcen, Toomas Vaimann, Bilal Asad. Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor. Electrical Engineering. 2020; 103 (2):1009-1017.

Chicago/Turabian Style

Payam Shams Ghahfarokhi; Ants Kallaste; Andrejs Podgornovs; Anouar Belahcen; Toomas Vaimann; Bilal Asad. 2020. "Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor." Electrical Engineering 103, no. 2: 1009-1017.