Parameter matching and optimization for power system of range-extended electric vehicle based on requirements

Liu, Hanwu; Lei, Yulong; Fu, Yao; Li, Xingzhong

doi:10.1177/0954407020936781

Cited by 21 publications

(10 citation statements)

References 16 publications

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“…The above data were substituted into Formula (1) to calculate the volume of the permanent magnet: V M = 20,834 mm 3 .…”

Section: Parameter Design Of Permanent Magnetmentioning

confidence: 99%

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Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

2024

WEVJ

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Extended-range electric vehicles have both a motor and an engine; the motor is used for driving, and the engine generates electricity via a range extender, which is connected to the motor. The permanent magnet generator is part of the range extender, and the output voltage is controlled by adjusting the engine’s speed; the generator’s rotating speed fluctuates, meaning that the engine’s fuel consumption increases. Meanwhile, considering the limited axial dimension of the range extender, an axial–radial disk hybrid generator that combines excitation is developed, making full use of the radial space; at the same time, the output voltage is adjusted without changing the engine’s speed. In this study, the generator’s magnetic field hybrid principle, the path of permanent magnetic circuit, and the electric excitation magnetic circuit under different loads were analyzed and verified via the finite element method. A comparative analysis method was also used, the technical index of the disk hybrid excitation generator was determined, and the main structural parameters were designed using theoretical calculations. The three-dimensional finite element model was established based on the results, and a finite element analysis was performed. An equivalent magnetic circuit model was established, and the formulas of synthetic permeability, leakage permeability, and effective permeability were determined. The finite element method (numerical method) and equivalent magnetic circuit method (analytical method) were used to calculate the synthetic magnetic fields of the air gap, rotor yoke, and rotor teeth under different excitation currents. A comparison between the two methods verified the design utility. The conclusions provide a valuable point of reference for the development of the disk hybrid excitation generator for use in range extenders in extended-range electric vehicles.

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“…The above data were substituted into Formula (1) to calculate the volume of the permanent magnet: V M = 20,834 mm 3 .…”

Section: Parameter Design Of Permanent Magnetmentioning

confidence: 99%

“…EREVs adopt the structure of hybrid electric vehicles, and they are especially suitable for use in urban road conditions with frequent starts and stops. They may also help nations to meet their energy conservation and emission reduction targets [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

2024

WEVJ

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“…Considering market research data, arrangement space ( C a ), maintenance ( C m ), ground clearance ( C g ), seating comfort ( C c ), and security (C s ) are selected as evaluation index. The method of evaluation questionnaire and expert marking were used to evaluate each factor, and the weighted ratios of each factor were determined by the Analytic Hierarchy Process (AHP), 6,46 as shown in Table 2. For a micro-electric car, the rationality of space is of great significance, followed by ergonomic needs including comfort and stability, with the transmission efficiency and ground clearance the least important.…”

Section: Parametric Matching For Batterymentioning

confidence: 99%

“…Therefore, more and more researchers focus on parameters matching for battery and power performance for EVs. Liu et al 6 proposed a parameter matching and optimization method for range-extended electric vehicle power and transmission system. The Advanced Electric Vehicle Architectures project [7][8][9] developed a tool to calculate the feasible volume of battery for EVs, considering performances and listed three schemes of battery arrangement.…”

Section: Introductionmentioning

confidence: 99%

Electric vehicles body frame structure design method: An approach to design electric vehicle body structure based on battery arrangement

Chen

Wang

Zhao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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Although the electric vehicles (EVs) have become the main development of the automotive industry, there is still very limited knowledge about the design method of EVs’ body structure. This paper substantially increases this limited knowledge by developing an EV’s aluminum alloy body frame structure design (EVFD) method based on battery arrangements. The main concept of the EVFD approach is the development of the parametric knowledge base to facilitate performance driven design of body structure in concept design stage, including the battery sub-libraries designed by vehicle power performances and the modular body frame structure sub-libraries and cross section of profile sub-libraries designed by structure performances. The layout of vehicle is firstly determined based on battery volume which calculated on the basis of power performance of EVs. And then, the body frame structures are designed by multi-load topology optimization and multi-objective parametric optimization based on the body structure performance, considering the battery layout and its mass distribution. The developed body structure knowledge base is screened through comparing their structural mechanical properties. The feasibility and accuracy of selected EV’s aluminum alloy body frame structure is verified by experiment. In this paper, the case study demonstrates that the proposed EVFD method based on battery arrangement can be effectively used to design aluminum alloy body frame structure of EVs, which provides a reference to other EV’s body structure design. Due to the performance driven design concept employed, the designed body structure for EV meets the requirements of lightweight, dynamic performance, and structural mechanical properties.

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“…Thus, an REEV is regarded as a promising alternative propulsion technology. 6 An RE is generally required to be of compactness, high-efficiency, low-cost and acceptable noise, vibration, and harshness (NVH), which are heavily dependent on the RE engine. 7 To meet these requirements, different types of RE engines have been investigated and developed by researchers and engineers.…”

Section: Introductionmentioning

confidence: 99%

Combustion optimization for fuel economy improvement of a dedicated range-extender engine

Han

Shi³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this study, the combustion system of a dedicated range-extender engine was optimized based on a production engine for fuel economy improvement with the use of enhanced tumble flow, higher compression ratio, Atkinson cycle and exhaust gas recirculation (EGR). First, the shape of the intake port was optimized to improve in-cylinder tumble and turbulence for combustion enhancement. The computational fluid dynamics (CFD) results showed that compared to the original intake port, the peak tumble ratio during the compression stroke of the new port is improved by 74.0%, and the turbulent kinetic energy at the spark timing is increased by 33.0%, and the results were verified through the flow test bench experiment. The dyno experiment showed that, with the new intake port, the engine brake specific fuel consumption (BSFC) was improved for all test conditions. Then, the late intake valve closing (IVC) and a higher compression ratio were used in combination to adopt the Atkinson cycle. The IVC timing was set to 642° ATDC based on the preset power target. And the compression ratio was set to 12 to balance knock tendency and BSFC improvement. Finally, the cooled EGR was optimized to further suppress the knocking tendency to improve fuel consumption. The results showed that, with the cooling Strategy 2, the attainable maximum EGR ratio at 2400 rpm full load and 70 Nm conditions was increased, the spark timing could be significantly advanced, and the BSFC was improved. The improvement of BSFC is between 6 g/kW·h and 13 g/kW·h for the load range from 40 Nm to the full load. After the optimization, the minimum BSFC of the range-extender engine reaches 233 g/kW·h, while it is around 242 g/kW·h for the base engine. The operation area where fuel consumption is lower than 240 g/kW·h becomes much wider.

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Parameter matching and optimization for power system of range-extended electric vehicle based on requirements

Cited by 21 publications

References 16 publications

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

Magnetic Field Analysis and Development of Disk Axial–Radial Hybrid Excitation Generator for Range Extenders in Extended-Range Electric Vehicles

Electric vehicles body frame structure design method: An approach to design electric vehicle body structure based on battery arrangement

Combustion optimization for fuel economy improvement of a dedicated range-extender engine

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