Payam Shams Ghahfarokhi
PhD Researcher
Payam Shams Ghahfarokhi was born in Iran in 1986. He received the BSc degree in electrical power engineering from IAUN, Iran, in 2010, the MSc degree in electrical power engineering from Newcastle University, UK, in 2011, and the PhD degree in electrical engineering and machines from Tallinn University of Technology, Estonia, 2019. He is currently a senior researcher and postdoc researcher with the Department of Electrical Machines and Apparatus, Riga Technical University, Latvia. His main interest is the electromagnetic design and thermal management of PM and Synchronous Reluctance electrical machines. He has authored/co-authored more than 25 papers in international scientific journals and conferences.

Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Cardoso, A. J. M.; Belahcen, A.; Vaimann, T.: ''The Oil Spray Cooling System of Automotive Traction Motors: The State of the Art''; IEEE Transactions on Transportation Electrification, Vol. 9, No. 1, pp. 428-451, March, 2023.
Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Cardoso, A. J. M.; Belahcen, A.; Vaimann, T.; Kudrjavtsev, O.; Asad, B.; Iqbal, M. N.: ''Steady-State Thermal Modeling of Salient Pole Synchronous Generator''; Energies, Vol. 15, No. 24, pp. 1-15, December, 2022.
Ghahfarokhi, P. S.; Podgornovs, A.; Cardoso, A. J. M.; Kallaste, A.; Belahcen, A.; Vaimann, T.: ''Hairpin Windings for Electric Vehicle Motors: Modeling and Investigation of AC Loss-Mitigating Approaches''; Machines, Vol. 10, No. 11, pp. 1-15, November, 2022.
Osemwinyen, O.; Hemeida, A.; Martin, F.; Gürbüz, I. T.; Ghahfarokhi, P. S.; Belahcen, A.: ''Determination of Core Losses Using an Inverse Modeling Technique''; IEEE Access, Vol. 10, No. , pp. 29224-29232, March, 2022.
Asad, B.; Vaimann, T.; Belahcen, A.; Kallaste, A.; Rassõlkin, A.; Khang, H. V.; Ghahfarokhi, P. S.; Naseer, M. U. ; Iqbal, M. N.: ''The Modeling and Investigation of Slot Skews and Supply Imbalance on the Development of Principal Slotting Harmonics in Squirrel Cage Induction Machines''; IEEE Access, Vol. 9, No. , pp. 165932-165946, December, 2021.
Iqbal, M. N.; Kütt, L.; Daniel, K.; Asad, B.; Ghahfarokhi, P. S.: ''Estimation of Harmonic Emission of Electric Vehicles and Their Impact on Low Voltage Residential Networks''; Sustainability, Vol. 13, No. 15, pp. 1-17, August, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Cardoso, A. J. M.; Belahcen, A.; Vaimann, T.; Asad, B.; Tiismus, H.: ''Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling''; Machines, Vol. 9, No. 6, pp. 1-12, June, 2021.
Tiismus, H.; Kallaste, A.; Belahcen, A.; Rassõlkin, A.; Vaimann, T.; Ghahfarokhi, P. S.: ''Additive Manufacturing and Performance of E-Type Transformer Core''; Energies, Vol. 14, No. 11, pp. 1-14, June, 2021.
Asad, B.; Vaimann, T.; Belahcen, A.; Kallaste, A.; Rassõlkin, A.; Ghahfarokhi, P. S.; Kudelina, K.: ''Transient Modeling and Recovery of Non-Stationary Fault Signature for Condition Monitoring of Induction Motors''; Applied Sciences, Vol. 11, No. 6, pp. 1-17, March, 2021.
Tiismus, H.; Kallaste, A.; Belahcen, A.; Tarraste, M.; Vaimann, T.; Rassõlkin, A.; Asad, B.; Ghahfarokhi, P. S.: ''AC Magnetic Loss Reduction of SLM Processed Fe-Si for Additive Manufacturing of Electrical Machines''; Energies, Vol. 14, No. 5, pp. 1-13, March, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Cardoso, A. J. M.; Belahcen, A.; Vaimann, T.; Tiismus, H.; Asad, B.: ''Opportunities and Challenges of Utilizing Additive Manufacturing Approaches in Thermal Management of Electrical Machines''; IEEE Access, Vol. 9, No. , pp. 36368-36381, February, 2021.
Asad, B.; Tiismus, H.; Vaimann, T.; Belahcen, A.; Kallaste, A.; Rassõlkin, A.; Ghahfarokhi, P. S.: ''Sliding Mean Value Subtraction-Based DC Drift Correction of B-H Curve for 3D-Printed Magnetic Materials''; Energies, Vol. 14, No. 2, pp. 1-10, January, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Belahcen, A.; Vaimann, T.: ''Development of Analytical Thermal Analysis Tool for Synchronous Reluctance Motors''; IET Electric Power Applications, Vol. 14, No. 10, pp. 1828-1836, October, 2020.
Ghahfarokhi, P. S.; Kallaste, A.; Podgornovs, A.; Cardoso, A. J. M.: ''Experimental Investigation of High Viscosity on Oil Spray Cooling System with Hairpin Winding''; IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives, Chania, Greece, pp. 234-238, August, 2023.
Sarap, M.; Kallaste, A.; Ghahfarokhi, P. S.; Vaimann, T.: ''Analysis of Advanced Passive Heatsinks for Electrical Machines Enabled by Additive Manufacturing''; IEEE Workshop on Electrical Machines Design, Control and Diagnosis, Newcastle upon Tyne, United Kingdom, pp. 1-6, April, 2023.
Sarap, M.; Kallaste, A.; Ghahfarokhi, P. S.; Tiismus, H.; Vaimann, T.: ''The Effect of Build Direction on the Thermal Conductivity of Additively Manufactured AlSi10Mg and Silicon-steel Samples''; International Conference on Electrical Machines, Valencia, Spain, pp. 538-543, September, 2022.
Sarap, M.; Kallaste, A.; Ghahfarokhi, P. S.; Tiismus, H.; Vaimann, T.: ''Determining the Thermal Conductivity of Additively Manufactured Metal Specimens''; International Workshop on Electric Drives, Moscow, Russia, pp. 1-4, January, 2022.
Ghahfarokhi, P. S.; Podgornovs, A.; Cardoso, A. J. M.; Kallaste, A.; Belahcen, A.; Vaimann, T.: ''Hairpin Windings Manufacturing, Design, and AC Losses Analysis Approaches for Electric Vehicle Motors''; International Electric Drives Production Conference, Erlangen, Germany, pp. 1-7, December, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Cardoso, A. J. M.; Kallaste, A.; Belahcen, A.; Vaimann, T.: ''Thermal Modeling of a TEFC Synchronous Reluctance Motor''; IEEE International Scientific Conference on Power and Electrical Engineering of Riga Technical University, Riga, Latvia, pp. 1-14, November, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Cardoso, A. J. M.; Kallaste, A.; Belahcen, A.; Vaimann, T.: ''AC Losses Analysis Approaches for Electric Vehicle Motors with Hairpin Configuration''; Annual Conference of the IEEE Industrial Electronics Society, Toronto, ON, Canada, pp. 1-4, October, 2021.
Naseer, M. U. ; Asad, B.; Ghahfarokhi, P. S.; Kallaste, A.; Vaimann, T.; Rassõlkin, A.: ''Experimental Determination of Equivalent Circuit Parameters for a Synchronous Generator''; IEEE Open Conference of Electrical, Electronic and Information Sciences, Vilnius, Lithuania, pp. 1-7, April, 2021.
Ghahfarokhi, P. S.; Podgornovs, A.; Kallaste, A.; Vaimann, T.; Belahcen, A.; Cardoso, A. J. M.: ''Oil Spray Cooling with Hairpin Windings in High-Performance Electric Vehicle Motors''; International Workshop on Electric Drives, Moscow, Russia, pp. 1-5, January, 2021.