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Francisco J. Márquez-Fernández
Division of Industrial Electrical Engineering and Automation, Lund University, SE-22100 Lund, Sweden

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Journal article
Published: 21 May 2021 in Energies
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At present, the prevalence of electric vehicles is increasing continuously. In particular, there are promising applications for commercial vehicles transferring from conventional to full electric, due to lower operating costs and stricter emission regulations. Thus, cost analysis from the fleet perspective becomes important. The study of cost competitiveness of different drivetrain designs is necessary to evaluate the fleet cost variance for different degrees of electrical machine commonality. This paper presents a methodology to find a preliminary powertrain design that minimizes the Total Cost of Ownership (TCO) for an entire fleet of electric commercial vehicles while fulfilling the performance requirements of each vehicle type. This methodology is based on scalable electric machine models, and particle swarm is used as the main optimization algorithm. The results show that the total cost penalty incurred when sharing the same electrical machine is small, therefore, there is a cost saving potential in higher degrees of electrical machine commonality.

ACS Style

Meng Lu; Gabriel Domingues-Olavarría; Francisco Márquez-Fernández; Pontus Fyhr; Mats Alaküla. Electric Drivetrain Optimization for a Commercial Fleet with Different Degrees of Electrical Machine Commonality. Energies 2021, 14, 2989 .

AMA Style

Meng Lu, Gabriel Domingues-Olavarría, Francisco Márquez-Fernández, Pontus Fyhr, Mats Alaküla. Electric Drivetrain Optimization for a Commercial Fleet with Different Degrees of Electrical Machine Commonality. Energies. 2021; 14 (11):2989.

Chicago/Turabian Style

Meng Lu; Gabriel Domingues-Olavarría; Francisco Márquez-Fernández; Pontus Fyhr; Mats Alaküla. 2021. "Electric Drivetrain Optimization for a Commercial Fleet with Different Degrees of Electrical Machine Commonality." Energies 14, no. 11: 2989.

Conference paper
Published: 01 October 2019 in 2019 IEEE Vehicle Power and Propulsion Conference (VPPC)
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ACS Style

Philip Abrahamsson; Francisco J. Márquez-Fernández; Mats Alakula. Thermal Modeling of an ERS during Dynamic Charging. 2019 IEEE Vehicle Power and Propulsion Conference (VPPC) 2019, 1 .

AMA Style

Philip Abrahamsson, Francisco J. Márquez-Fernández, Mats Alakula. Thermal Modeling of an ERS during Dynamic Charging. 2019 IEEE Vehicle Power and Propulsion Conference (VPPC). 2019; ():1.

Chicago/Turabian Style

Philip Abrahamsson; Francisco J. Márquez-Fernández; Mats Alakula. 2019. "Thermal Modeling of an ERS during Dynamic Charging." 2019 IEEE Vehicle Power and Propulsion Conference (VPPC) , no. : 1.

Journal article
Published: 26 June 2019 in IEEE Transactions on Transportation Electrification
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The growth of electromobility emphasizes the need for good charging solutions. Electric vehicles can be charged either while standing still (static charging) or while in movement (dynamic charging) by using Electric Road Systems (ERS). In both cases, significant power levels are used to transfer energy to the vehicles, thus requiring a thermal design that is able to handle the losses generated while charging. This paper proposes a thermal model to assess the temperatures inside a particular type of ERS: an Alternating Short-Segmented ERS (ASSE). The thermal model is calibrated and validated against measurements on a test track with a full scale prototype. Measurements show that the ASSE can supply charging power in excess of 90 kW continuously. Peak power of 180 kW can be sustained for 10 minutes before the ASSE is at risk of overheating. Nonetheless, after high-power charging, the temperature of exposed surfaces may entail a safety hazard and the model can be used to design and evaluate potential corrective measurements to mitigate this.

ACS Style

Philip Abrahamsson; Francisco J. Marquez-Fernandez; Mats Alakula. Thermal Modeling and Analysis of an Alternating Short-Segmented Conductive ERS. IEEE Transactions on Transportation Electrification 2019, 5, 1078 -1086.

AMA Style

Philip Abrahamsson, Francisco J. Marquez-Fernandez, Mats Alakula. Thermal Modeling and Analysis of an Alternating Short-Segmented Conductive ERS. IEEE Transactions on Transportation Electrification. 2019; 5 (4):1078-1086.

Chicago/Turabian Style

Philip Abrahamsson; Francisco J. Marquez-Fernandez; Mats Alakula. 2019. "Thermal Modeling and Analysis of an Alternating Short-Segmented Conductive ERS." IEEE Transactions on Transportation Electrification 5, no. 4: 1078-1086.

Conference paper
Published: 01 June 2019 in 2019 IEEE Transportation Electrification Conference and Expo (ITEC)
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ACS Style

Avo Reinap; Mats Andersson; Francisco J. Marquez-Fernandez; Philip Abrahamsson; Mats Alakula. Performance Estimation of a Traction Machine with Direct Cooled Hairpin Winding. 2019 IEEE Transportation Electrification Conference and Expo (ITEC) 2019, 1 .

AMA Style

Avo Reinap, Mats Andersson, Francisco J. Marquez-Fernandez, Philip Abrahamsson, Mats Alakula. Performance Estimation of a Traction Machine with Direct Cooled Hairpin Winding. 2019 IEEE Transportation Electrification Conference and Expo (ITEC). 2019; ():1.

Chicago/Turabian Style

Avo Reinap; Mats Andersson; Francisco J. Marquez-Fernandez; Philip Abrahamsson; Mats Alakula. 2019. "Performance Estimation of a Traction Machine with Direct Cooled Hairpin Winding." 2019 IEEE Transportation Electrification Conference and Expo (ITEC) , no. : 1.

Conference paper
Published: 01 June 2019 in 2019 IEEE Transportation Electrification Conference and Expo (ITEC)
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ACS Style

Philip Abrahamsson; Francisco J. Marquez-Fernandez; Mats Alakula. Thermal Assessment of an ERS for Static Charging of Electric Vehicles. 2019 IEEE Transportation Electrification Conference and Expo (ITEC) 2019, 1 .

AMA Style

Philip Abrahamsson, Francisco J. Marquez-Fernandez, Mats Alakula. Thermal Assessment of an ERS for Static Charging of Electric Vehicles. 2019 IEEE Transportation Electrification Conference and Expo (ITEC). 2019; ():1.

Chicago/Turabian Style

Philip Abrahamsson; Francisco J. Marquez-Fernandez; Mats Alakula. 2019. "Thermal Assessment of an ERS for Static Charging of Electric Vehicles." 2019 IEEE Transportation Electrification Conference and Expo (ITEC) , no. : 1.

Conference paper
Published: 01 June 2019 in 2019 IEEE Transportation Electrification Conference and Expo (ITEC)
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ACS Style

Francisco J. Marquez-Fernandez; Joschka Bischoff; Gabriel Domingues-Olavarria; Mats Alakula. Using Multi-Agent Transport Simulations to Assess the Impact of EV Charging Infrastructure Deployment. 2019 IEEE Transportation Electrification Conference and Expo (ITEC) 2019, 1 .

AMA Style

Francisco J. Marquez-Fernandez, Joschka Bischoff, Gabriel Domingues-Olavarria, Mats Alakula. Using Multi-Agent Transport Simulations to Assess the Impact of EV Charging Infrastructure Deployment. 2019 IEEE Transportation Electrification Conference and Expo (ITEC). 2019; ():1.

Chicago/Turabian Style

Francisco J. Marquez-Fernandez; Joschka Bischoff; Gabriel Domingues-Olavarria; Mats Alakula. 2019. "Using Multi-Agent Transport Simulations to Assess the Impact of EV Charging Infrastructure Deployment." 2019 IEEE Transportation Electrification Conference and Expo (ITEC) , no. : 1.

Journal article
Published: 24 May 2019 in World Electric Vehicle Journal
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Conductive Electric Road Systems (ERS) appear as a promising solution for the electrification of transportation, particularly for heavy vehicles and long-distance trips but also for light vehicles. Significant research efforts are currently devoted to the development of conductive ERS systems, with up to four pilot test sites with different technologies in operation only in Sweden. With the help of electric models and experimental measurements on a pilot test track, this article assesses the potential safety challenges associated with one aspect of this technology: the absence of a reliable protective earth connection while the vehicle is connected to the ERS power supply. The results highlight the importance of monitoring the chassis potential at all times and the need of an active safety mechanism to disconnect the vehicle from the ERS supply if a severe fault occurs.

ACS Style

Francisco J. Márquez-Fernández; Sönke Schuch; Lars Lindgren; Mats Alaküla; Márquez- Fernández. Electric Safety Challenges with a Conductive Electric Road System—Chassis Potential Modeling and Measurement. World Electric Vehicle Journal 2019, 10, 30 .

AMA Style

Francisco J. Márquez-Fernández, Sönke Schuch, Lars Lindgren, Mats Alaküla, Márquez- Fernández. Electric Safety Challenges with a Conductive Electric Road System—Chassis Potential Modeling and Measurement. World Electric Vehicle Journal. 2019; 10 (2):30.

Chicago/Turabian Style

Francisco J. Márquez-Fernández; Sönke Schuch; Lars Lindgren; Mats Alaküla; Márquez- Fernández. 2019. "Electric Safety Challenges with a Conductive Electric Road System—Chassis Potential Modeling and Measurement." World Electric Vehicle Journal 10, no. 2: 30.

Conference paper
Published: 01 September 2018 in 2018 XIII International Conference on Electrical Machines (ICEM)
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This paper explores and assesses power loss generation and heat extraction in a stator with directly air-cooled laminated winding. An electrical machine winding made of an electric conducting sheet, which have slotted structure for accommodating a magnetic core, is denoted a laminated winding. A space is introduced between the conducting sheets so that the heating power is removed right where it is created. Explicit to the laminated windings, the conductors with smallest cross section and highest dc resistance have also limited cooling. Since these conductors are closest to the air-gap they become subject to induced power losses. An electrical machine with folded air-cooled laminated winding is built and evaluated. The paper demonstrates on how the thermal management of the stator segments is evaluated and adjusted during the manufacturing process. The power loss estimation of the prototype machine reveals significant discrepancy between the measurements and the calculation of known power losses at no load condition compared to short-circuit conditions. Conjugate heat transfer models are developed to evaluate the coolant flow distribution and heat dissipation in the direct air-cooled laminated windings.

ACS Style

A. Reinap; C. Hogmark; F. J. Marquez-Fernandez; M. Alakiila; M. Andersson. Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings. 2018 XIII International Conference on Electrical Machines (ICEM) 2018, 2675 -2681.

AMA Style

A. Reinap, C. Hogmark, F. J. Marquez-Fernandez, M. Alakiila, M. Andersson. Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings. 2018 XIII International Conference on Electrical Machines (ICEM). 2018; ():2675-2681.

Chicago/Turabian Style

A. Reinap; C. Hogmark; F. J. Marquez-Fernandez; M. Alakiila; M. Andersson. 2018. "Power Losses and Heat Extraction in a Stator with Directly Air-Cooled Laminated Windings." 2018 XIII International Conference on Electrical Machines (ICEM) , no. : 2675-2681.

Conference paper
Published: 01 September 2018 in 2018 XIII International Conference on Electrical Machines (ICEM)
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This paper presents and assesses the cooling integration of electrical machines with concentrated windings. A conventional coil in a concentrated winding with forced cooling applied on the exterior coil surfaces is replaced by an alternative solution where the coil is opened up in a laminar structure with the intention of the coolant fluid penetrating the coil and removing the interior heat. This is a purely theoretical study where a set of FE models are used to evaluate the torque capability under elevated thermal loads, comparing conventional to alternative cooling integration topologies. The objective of the unsophisticated FE evaluation models and simple design rules is to demonstrate the potential of the laminated type of windings where the space between the current carrying flat conductors is used to circulate coolant so that the heat losses are removed in the vicinity of where they are generated. Conjugate heat transfer analysis in Comsol multiphysics based on 2D and 3D is used to demonstrate the cooling capability for air and oil cooled windings up to thermal loads corresponding to 50 A/mm 2 at 24 nΩm and a target hot spot temperature of 120°C for copper.

ACS Style

A. Reinap; F. J. Marquez-Fernandez; M. Alakula; R. Deodhar; K. Mishima. Direct Conductor Cooling in Concentrated Windings. 2018 XIII International Conference on Electrical Machines (ICEM) 2018, 2654 -2660.

AMA Style

A. Reinap, F. J. Marquez-Fernandez, M. Alakula, R. Deodhar, K. Mishima. Direct Conductor Cooling in Concentrated Windings. 2018 XIII International Conference on Electrical Machines (ICEM). 2018; ():2654-2660.

Chicago/Turabian Style

A. Reinap; F. J. Marquez-Fernandez; M. Alakula; R. Deodhar; K. Mishima. 2018. "Direct Conductor Cooling in Concentrated Windings." 2018 XIII International Conference on Electrical Machines (ICEM) , no. : 2654-2660.

Journal article
Published: 10 August 2018 in IEEE Transactions on Industry Applications
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This work presents a methodology for modeling, designing and scaling the electromagnetic, mechanical and thermal characteristics of the main components in an electric powertrain (excluding the battery) i.e. power electronics converter, electrical machine and mechanical transmission. Additionally, a framework for estimating the cost of these components is described. This framework takes into consideration not only the material cost but also all major manufacturing steps required for the production of a component and their dependency on expected production volumes. Moreover, a procedure to optimize the design of an electric powertrain, taking advantage of the aforementioned models, is proposed. Finally, the powertrain for a passenger electric vehicle is optimized using the proposed methodology and the results are compared in terms of electrical machine topology, powertrain concepts, cost, weight, gear ratio(s) in the transmission and overloading capabilities.

ACS Style

Gabriel Domingues-Olavarria; Francisco J. Marquez-Fernandez; Pontus Fyhr; Avo Reinap; Mats Andersson; Mats Alakula. Optimization of Electric Powertrains Based on Scalable Cost and Performance Models. IEEE Transactions on Industry Applications 2018, 55, 751 -764.

AMA Style

Gabriel Domingues-Olavarria, Francisco J. Marquez-Fernandez, Pontus Fyhr, Avo Reinap, Mats Andersson, Mats Alakula. Optimization of Electric Powertrains Based on Scalable Cost and Performance Models. IEEE Transactions on Industry Applications. 2018; 55 (1):751-764.

Chicago/Turabian Style

Gabriel Domingues-Olavarria; Francisco J. Marquez-Fernandez; Pontus Fyhr; Avo Reinap; Mats Andersson; Mats Alakula. 2018. "Optimization of Electric Powertrains Based on Scalable Cost and Performance Models." IEEE Transactions on Industry Applications 55, no. 1: 751-764.

Journal article
Published: 07 June 2018 in World Electric Vehicle Journal
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Electric Road Systems (ERS) have emerged as an alternative to deal with the main drawbacks that battery electric vehicles present (i.e., higher cost, short driving range, long charging times, etc.). This paper analyses the societal cost of electrifying all road transport in Denmark under four different scenarios. The first scenario considered in this study is based on today’s approach of having electric vehicles with high battery capacity and fast charging stations, the remaining scenarios study the cost of implementing different ERS at a national level. The results clearly show the benefits of implementing road bound electric road solutions that can be used both by commercial and passenger vehicles.

ACS Style

Gabriel Domingues-Olavarría; Francisco J. Marquez-Fernandez; Pontus Fyhr; Avo Reinap; Mats Alakula. Electric Roads: Analyzing the Societal Cost of Electrifying All Danish Road Transport. World Electric Vehicle Journal 2018, 9, 9 .

AMA Style

Gabriel Domingues-Olavarría, Francisco J. Marquez-Fernandez, Pontus Fyhr, Avo Reinap, Mats Alakula. Electric Roads: Analyzing the Societal Cost of Electrifying All Danish Road Transport. World Electric Vehicle Journal. 2018; 9 (1):9.

Chicago/Turabian Style

Gabriel Domingues-Olavarría; Francisco J. Marquez-Fernandez; Pontus Fyhr; Avo Reinap; Mats Alakula. 2018. "Electric Roads: Analyzing the Societal Cost of Electrifying All Danish Road Transport." World Electric Vehicle Journal 9, no. 1: 9.

Journal article
Published: 19 March 2018 in IEEE Transactions on Industry Applications
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This article presents the experimental validation of a novel cooling concept applied to a high speed switched reluctance machine topology for traction applications. By circulating the coolant in between the coils and the stator poles the winding and the stator iron are virtually thermally decoupled. A number of test motorettes are used to demonstrate the potential of the cooling concept at current density values of up to 27 A/mm2 continuously. The measurements are also used to validate a thermal model of the machine and further improvements of both the model and the experimental setup are proposed.

ACS Style

Francisco J. Marquez-Fernandez; Johannes Hendrik J. Potgieter; Alexander G. Fraser; Malcolm D. McCulloch. Experimental Validation of a Thermal Model for High-Speed Switched Reluctance Machines for Traction Applications. IEEE Transactions on Industry Applications 2018, 54, 3235 -3244.

AMA Style

Francisco J. Marquez-Fernandez, Johannes Hendrik J. Potgieter, Alexander G. Fraser, Malcolm D. McCulloch. Experimental Validation of a Thermal Model for High-Speed Switched Reluctance Machines for Traction Applications. IEEE Transactions on Industry Applications. 2018; 54 (4):3235-3244.

Chicago/Turabian Style

Francisco J. Marquez-Fernandez; Johannes Hendrik J. Potgieter; Alexander G. Fraser; Malcolm D. McCulloch. 2018. "Experimental Validation of a Thermal Model for High-Speed Switched Reluctance Machines for Traction Applications." IEEE Transactions on Industry Applications 54, no. 4: 3235-3244.

Conference paper
Published: 01 August 2017 in 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific)
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Electric Road Systems (ERS) are analysed here as a feasible solution for the electrification of heavy traffic, where the predominant approach for passenger cars based only on batteries and a network of fast-charging stations combined with slower overnight charging becomes unrealistic due to the large amount of batteries required. Nonetheless, this study shows that in most cases, building such ERS so that they can be used by both types of vehicles results in added value to society.

ACS Style

Francisco J. Marquez-Fernandez; Gabriel Domingues-Olavarria; Lars Lindgren; Mats Alakula. Electric roads: The importance of sharing the infrastructure among different vehicle types. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) 2017, 1 -6.

AMA Style

Francisco J. Marquez-Fernandez, Gabriel Domingues-Olavarria, Lars Lindgren, Mats Alakula. Electric roads: The importance of sharing the infrastructure among different vehicle types. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific). 2017; ():1-6.

Chicago/Turabian Style

Francisco J. Marquez-Fernandez; Gabriel Domingues-Olavarria; Lars Lindgren; Mats Alakula. 2017. "Electric roads: The importance of sharing the infrastructure among different vehicle types." 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) , no. : 1-6.

Conference paper
Published: 01 August 2017 in 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific)
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Dynamic Charging, meaning supplying electric energy to electric vehicles while moving and also referred to as Electric Road Systems (ERS), can be implemented in a number of different ways. In Sweden, no less than four different technologies are being developed and/or demonstrated. This is, in an international comparison, unique. This paper represents an effort to describe these different technologies and their known and expected properties.

ACS Style

Mats Alakula; Francisco J. Márquez-Fernández. Dynamic charging solutions in Sweden: An overview. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) 2017, 1 -6.

AMA Style

Mats Alakula, Francisco J. Márquez-Fernández. Dynamic charging solutions in Sweden: An overview. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific). 2017; ():1-6.

Chicago/Turabian Style

Mats Alakula; Francisco J. Márquez-Fernández. 2017. "Dynamic charging solutions in Sweden: An overview." 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific) , no. : 1-6.

Conference paper
Published: 01 June 2017 in 2017 IEEE Transportation Electrification Conference and Expo (ITEC)
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A methodology for designing and scaling the performance and thermal characteristics of electric powertrain components is presented. This methodology is aimed at finding optimum component combinations based on a set of requirements. Both drive-cycle performance and specific operating modes such as curb-climbing and maximum wheel speed are considered. This allows the selection of electrical machine topology, the design and sizing of the related gearbox, as well as the power-electronic converter needed to fulfill the wheel torque and speed requirements for all operating points, including overloading. Utilizing subsystem-models inside an optimization loop, the powertrain components can be sized using a number of goals such as lowest cost, size, weight or combinations of these, while still fulfilling the target specifications for a number of powertrain layouts.

ACS Style

Gabriel Domingues; Francisco J. Márquez-Fernández; Pontus Fyhr; Avo Reinap; Mats Andersson; Mats Alakula. Scalable performance, efficiency and thermal models for electric drive components used in powertrain simulation and optimization. 2017 IEEE Transportation Electrification Conference and Expo (ITEC) 2017, 644 -649.

AMA Style

Gabriel Domingues, Francisco J. Márquez-Fernández, Pontus Fyhr, Avo Reinap, Mats Andersson, Mats Alakula. Scalable performance, efficiency and thermal models for electric drive components used in powertrain simulation and optimization. 2017 IEEE Transportation Electrification Conference and Expo (ITEC). 2017; ():644-649.

Chicago/Turabian Style

Gabriel Domingues; Francisco J. Márquez-Fernández; Pontus Fyhr; Avo Reinap; Mats Andersson; Mats Alakula. 2017. "Scalable performance, efficiency and thermal models for electric drive components used in powertrain simulation and optimization." 2017 IEEE Transportation Electrification Conference and Expo (ITEC) , no. : 644-649.

Conference paper
Published: 01 June 2017 in 2017 IEEE Transportation Electrification Conference and Expo (ITEC)
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In this article five scenarios for fully electric road transport in Sweden are compared, looking at the total system cost for different combinations of battery systems, vehicle equipment and charging solutions, including the use of Electric Road Systems (ERS). The main objective of this work is not to provide accurate price estimations, but to help understanding the main cost drivers of transport electrification and to illustrate how the final system cost is influenced by the different parameters considered. The main conclusion obtained is that, despite the substantial initial investments required for the deployment of electric roads, a system featuring only static charging and vehicles with large size batteries results in a higher total system cost. Moreover, due to the much larger number of light duty vehicles in the fleet, the deployment of an ERS system that can be used by both long-haul and light duty vehicles is substantially more advantageous than a solution restricted only to long-haul vehicles.

ACS Style

Pontus Fyhr; Gabriel Domingues; Mats Andersson; Francisco J. Marquez-Fernandez; Hans Bangtsson; Mats Alakula. Electric roads: Reducing the societal cost of automotive electrification. 2017 IEEE Transportation Electrification Conference and Expo (ITEC) 2017, 773 -778.

AMA Style

Pontus Fyhr, Gabriel Domingues, Mats Andersson, Francisco J. Marquez-Fernandez, Hans Bangtsson, Mats Alakula. Electric roads: Reducing the societal cost of automotive electrification. 2017 IEEE Transportation Electrification Conference and Expo (ITEC). 2017; ():773-778.

Chicago/Turabian Style

Pontus Fyhr; Gabriel Domingues; Mats Andersson; Francisco J. Marquez-Fernandez; Hans Bangtsson; Mats Alakula. 2017. "Electric roads: Reducing the societal cost of automotive electrification." 2017 IEEE Transportation Electrification Conference and Expo (ITEC) , no. : 773-778.

Journal article
Published: 15 May 2017 in IEEE Transactions on Energy Conversion
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This paper presents a dynamic method that derives the magnetic model of permanent magnet synchronous machines. The method uses the moment of inertia of the rotating parts to limit the speed dynamics while specific stator winding currents accelerate and brake the machine. Measurements of the rotor position and the phase voltages give the voltages in the $dq$ frame and the rotational frequency, which in turn yield the magnetic model. In addition to the magnetic model, the method also provides the $dq$ inductances and the resistance of the stator windings. Results from the method are compared to an established test method and finite-element simulations with excellent match. Furthermore, the results show that the method is robust to changes of the temperature in the stator windings of the machine.

ACS Style

Sebastian Hall; Francisco J. Marquez-Fernandez; Mats Alakula. Dynamic Magnetic Model Identification of Permanent Magnet Synchronous Machines. IEEE Transactions on Energy Conversion 2017, 32, 1367 -1375.

AMA Style

Sebastian Hall, Francisco J. Marquez-Fernandez, Mats Alakula. Dynamic Magnetic Model Identification of Permanent Magnet Synchronous Machines. IEEE Transactions on Energy Conversion. 2017; 32 (4):1367-1375.

Chicago/Turabian Style

Sebastian Hall; Francisco J. Marquez-Fernandez; Mats Alakula. 2017. "Dynamic Magnetic Model Identification of Permanent Magnet Synchronous Machines." IEEE Transactions on Energy Conversion 32, no. 4: 1367-1375.

Journal article
Published: 07 September 2016 in IEEE Transactions on Industrial Electronics
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This paper forms part of a broader study on the design optimization of a high speed switched reluctance motor for automotive traction applications. Due to the high speed operation and resulting high electrical frequency, it is of extreme importance that the different loss components of this motor are accurately calculated. In this study, several effects are observed that influence the accurate measurement of the core loss data used in the calculation of the iron loss in the motor design. It is shown that especially at high frequency and flux density, the loss measurement can be significantly influenced by effects such as temperature, winding AC loss, flux density saturation, and flux waveform shape. The proposed fundamental frequency of the case study motor is 4 kHz, and flux density values of up to 2 T can be obtained under certain load conditions.

ACS Style

Johannes H. J. Potgieter; Francisco J. Marquez-Fernandez; Alexander G. Fraser; Malcolm D. McCulloch. Effects Observed in the Characterization of Soft Magnetic Composite for High Frequency, High Flux Density Applications. IEEE Transactions on Industrial Electronics 2016, 64, 2486 -2493.

AMA Style

Johannes H. J. Potgieter, Francisco J. Marquez-Fernandez, Alexander G. Fraser, Malcolm D. McCulloch. Effects Observed in the Characterization of Soft Magnetic Composite for High Frequency, High Flux Density Applications. IEEE Transactions on Industrial Electronics. 2016; 64 (3):2486-2493.

Chicago/Turabian Style

Johannes H. J. Potgieter; Francisco J. Marquez-Fernandez; Alexander G. Fraser; Malcolm D. McCulloch. 2016. "Effects Observed in the Characterization of Soft Magnetic Composite for High Frequency, High Flux Density Applications." IEEE Transactions on Industrial Electronics 64, no. 3: 2486-2493.

Conference paper
Published: 01 May 2015 in 2015 IEEE International Electric Machines & Drives Conference (IEMDC)
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This paper forms part of a broader study on the design of an unconventional, high speed, switched reluctance machine (SRM), for automotive traction applications making use of soft magnetic composite (SMC) material. The aim is to have this machine operate at a fundamental frequency of up to 4 kHz. Another characteristic is that switched reluctance machines tend to be operated in deep saturation a lot. Furthermore, the flux waveforms of these machine are non-sinusoidal in nature. Due to the expected high core loss, the main aim of the study in this paper is to accurately characterise the loss coefficients experimentally for eventual use in finite element (FE) analysis. The need for these experiments comes from the fact that very limited data is supplied by most manufacturers, especially at high frequencies and flux densities.

ACS Style

Johannes H. J. Potgieter; Francisco J. Marquez-Fernandez; Alexander Fraser; Malcolm D. McCulloch. Loss coefficient characterisation for high frequency, high flux density, electrical machine applications. 2015 IEEE International Electric Machines & Drives Conference (IEMDC) 2015, 1265 -1271.

AMA Style

Johannes H. J. Potgieter, Francisco J. Marquez-Fernandez, Alexander Fraser, Malcolm D. McCulloch. Loss coefficient characterisation for high frequency, high flux density, electrical machine applications. 2015 IEEE International Electric Machines & Drives Conference (IEMDC). 2015; ():1265-1271.

Chicago/Turabian Style

Johannes H. J. Potgieter; Francisco J. Marquez-Fernandez; Alexander Fraser; Malcolm D. McCulloch. 2015. "Loss coefficient characterisation for high frequency, high flux density, electrical machine applications." 2015 IEEE International Electric Machines & Drives Conference (IEMDC) , no. : 1265-1271.

Conference paper
Published: 01 September 2014 in 2014 International Conference on Electrical Machines (ICEM)
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The dynamic testing method, as an alternative to traditional bench testing against a brake, has proven to be a fast, convenient, yet accurate way of characterizing electrical machines. By measuring the speed and the currents and voltages while alternatively accelerating and decelerating the electrical machine it is possible to obtain its torque and flux linkage characteristics dynamically. This article presents the application of the dynamic testing method to the validation of a HEV electric traction machine, comparing the torque and flux linkage characteristics obtained experimentally to those from the Finite Element design simulations. Moreover, a discussion is brought up on the possible reasons for the deviations observed.

ACS Style

Francisco J. Marquez-Fernandez; Sebastian Hall; Mats Alakula. Dynamic testing characterization of a HEV traction motor. 2014 International Conference on Electrical Machines (ICEM) 2014, 1569 -1575.

AMA Style

Francisco J. Marquez-Fernandez, Sebastian Hall, Mats Alakula. Dynamic testing characterization of a HEV traction motor. 2014 International Conference on Electrical Machines (ICEM). 2014; ():1569-1575.

Chicago/Turabian Style

Francisco J. Marquez-Fernandez; Sebastian Hall; Mats Alakula. 2014. "Dynamic testing characterization of a HEV traction motor." 2014 International Conference on Electrical Machines (ICEM) , no. : 1569-1575.