Geometric optimization Of Variable Flux Reluctance Machines For Full Electric Vehicles

Zuurbier, M.M.J.; Fahdzyana, Chyannie A.; Hofman, Théo; Bao, Jing; Lomonova, E.A.

doi:10.1109/ever.2019.8813611

Cited by 7 publications

(9 citation statements)

References 18 publications

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“…The current excitation is assigned for both ac-and dc-field copper windings. Time independent differential form of the vector potential formulation ( 5) and ( 6), so called Ampère's law is employed with the magnetic flux conservation (7).…”

Section: Electromagnetic Aspectsmentioning

confidence: 99%

“…Besides its aforementioned advantages, VFRM should be optimally designed to be competitive with the PM synchronous machine in torque density and efficiency. In [7], a VFRM with an inner rotor is optimized for the nominal operating point, which is 150 Nm and 4800 rpm, using the block coordinate descent optimization method. Also, the rotor pole arc of an inner rotor VFRM is optimized in [8] to maximize the torque production where the average torque is less than 1 Nm.…”

Section: Introductionmentioning

confidence: 99%

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A comparative study between inner and outer rotor variable flux reluctance machine topologies for heavy-duty electric vehicles

2022

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Section: Electromagnetic Aspectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study between inner and outer rotor variable flux reluctance machine topologies for heavy-duty electric vehicles

2022

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“…It should be noted that there is a limit on the location options for the second torque-speed combination, since (6) should always result in real roots, i.e., d 2 01 − 4 d 00 d 02 > 0. Finally, given the information on the efficiency at these optimal points obtained via (9), only two efficiencies are needed where the machine output power is larger than zero. This way, we can obtain the values for the coefficients c 20 and c 11 via (9).…”

Section: Machine Efficiency Map Reconstructionmentioning

confidence: 99%

“…Finally, given the information on the efficiency at these optimal points obtained via (9), only two efficiencies are needed where the machine output power is larger than zero. This way, we can obtain the values for the coefficients c 20 and c 11 via (9). Using the values for c 20 and c 11 , the values for c 00 , c 01 , and c 02 follow naturally from (8).…”

Section: Machine Efficiency Map Reconstructionmentioning

confidence: 99%

“…Some works focus on the design of the e-machine depending on the operation conditions [7]. The design of an e-machine is a highly complex process due to its multi-objective and nonlinear nature of the mathematical design problem [8], which can result in long computation times [9]. To avoid a large asymmetric design optimization process of the powertrain, some researchers use scaling laws or descriptive analytic models to capture the energy efficiency characteristics to speed up the scaling process [10], [11].…”

Section: Introductionmentioning

confidence: 99%

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Transmission Ratio Design for Electric Vehicles via Analytical Modeling and Optimization

Hofman¹,

Salazar²

2020

Preprint

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In this paper we present an effective analytical modeling approach for the design of the transmission of electric vehicles. Specifically, we first devise an analytical loss model for an electric machine and show that it can be accurately fitted by only sampling three points from the original motor map. Second, we leverage this model to derive the optimal transmission ratio as a function of the wheels' speed and torque, and use it to optimize the transmission ratio. Finally, we showcase our analytical approach with a real-world case-study comparing two different transmission technologies on a BMW i3: a fixed-gear transmission (FGT) and a continuously variable transmission (CVT). Our results show that even for e-machines intentionally designed for a FGT, the implementation of a CVT can significantly improve their operational efficiency by more than 3%. The provided model will ultimately bridge the gap in understanding how to efficiently specify the e-machine and the transmission technology in an integrated fashion, and enable to effectively compare single-and multi-speed-based electric powertrains.

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A Review of Recent Topologies of Variable Flux Machines

Badahdah,

El-Refaie

2024

2024 International Conference on Electrical Machines (ICEM)

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Geometric optimization Of Variable Flux Reluctance Machines For Full Electric Vehicles

Cited by 7 publications

References 18 publications

A comparative study between inner and outer rotor variable flux reluctance machine topologies for heavy-duty electric vehicles

A comparative study between inner and outer rotor variable flux reluctance machine topologies for heavy-duty electric vehicles

Transmission Ratio Design for Electric Vehicles via Analytical Modeling and Optimization

A Review of Recent Topologies of Variable Flux Machines

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