scholarly journals Research on the Efficiency Optimization Control of the Regenerative Braking System of Hybrid Electrical Vehicle Based on Electrical Variable Transmission

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 116823-116834 ◽  
Author(s):  
Qiwei Xu ◽  
Fukang Wang ◽  
Xuefeng Zhang ◽  
Shumei Cui
Keyword(s):  
Regenerative Braking ◽  
Efficiency Optimization ◽  
Braking System ◽  
Optimization Control ◽  
Electrical Vehicle ◽  
Variable Transmission ◽  
Electrical Variable ◽  
Hybrid Electrical Vehicle

Evaluating a distributed regenerative braking system for freight trains

2018 ◽  
Vol 233 (8) ◽  
pp. 844-856 ◽  
Author(s):  
Andreas Pyper ◽  
P Stephan Heyns
Keyword(s):  
Energy Savings ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Regenerative Braking ◽  
Benefit Analysis ◽  
Technical Feasibility ◽  
Freight Train ◽  
Braking System ◽  
Variable Transmission ◽  
The Cost

This paper presents an investigation on a distributed regenerative braking system for freight trains. The system, which involves installing regenerative braking units on the bogies of freight rail wagons, is proposed in a patent by Transnet SOC Ltd. The system allows for numerous regenerative braking systems to be installed on a single freight train in a distributed manner, which collectively function together to perform regenerative braking on the train to reduce the energy consumption of the train. The proposed system would, if implemented successfully, alleviate challenges and limitations with current regenerative braking systems on diesel-powered freight trains. The goal of the investigation is to determine whether the system is both technically and economically feasible. The proposed regenerative braking system is conceptualized in this study by first establishing the requirements of the system from in-service train data, followed by the development of the subsystems and major components based on existing technology. A physical system simulation model is subsequently developed to establish the energy savings performance of the system concepts for typical freight train routes. The results show that energy savings of between 10% and 24% can be realized. This demonstrates the technical feasibility of the proposed system. Next, the proposed system and the candidate concepts are evaluated in economic terms by means of a cost–benefit analysis. The decision criteria calculated in the cost–benefit analysis provide unanimous results as to which of the candidate concepts are economically feasible. It is shown that four of the candidate concepts, all utilizing the same transmission topology incorporating a continuously variable transmission with different flywheel configurations, are economically feasible. It is therefore concluded that the results of the cost–benefit analysis indicated that the proposed distributed regenerative braking system for freight trains is economically feasible and could deliver favorable financial returns if pursued.

HYDRAULIC-PNEUMATIC REGENERATIVE BRAKING SYSTEM FOR HYBRIDIZATION OF COMMERCIAL URBAN VEHICLES

2017 ◽  
Author(s):  
Rafael Rivelino da Silva Bravo ◽  
Artur Tozzi C Gama ◽  
Amir Antonio Martins Oliveira ◽  
Victor Juliano De Negri
Keyword(s):  
Regenerative Braking ◽  
Braking System

Intelligent optimization of EV comfort based on a cooperative braking system

2021 ◽  
pp. 095440702110044
Author(s):  
Lingying Zhao ◽  
Min Ye ◽  
Xinxin Xu
Keyword(s):  
System Model ◽  
Regenerative Braking ◽  
Coupling Mechanism ◽  
Intelligent Algorithm ◽  
Distribution Strategy ◽  
Braking System ◽  
Logic Diagram ◽  
Braking Torque ◽  
Braking Force ◽  
The Time Domain

To address the comfort of an electric vehicle, a coupling mechanism between mechanical friction braking and electric regenerative braking was studied. A cooperative braking system model was established, and comprehensive simulations and system optimizations were carried out. The performance of the cooperative braking system was analyzed. The distribution of the braking force was optimized by an intelligent method, and the distribution of a braking force logic diagram based on comfort was proposed. Using an intelligent algorithm, the braking force was distributed between the two braking systems and between the driving and driven axles. The experiment based on comfort was carried out. The results show that comfort after optimization is improved by 76.29% compared with that before optimization by comparing RMS value in the time domain. The reason is that the braking force distribution strategy based on the optimization takes into account the driver’s braking demand, the maximum braking torque of the motor, and the requirements of vehicle comfort, and makes full use of the braking torque of the motor. The error between simulation results and experimental results is 5.13%, which indicates that the braking force’s distribution strategy is feasible.

Modeling and Implementation of a 1 kW, Air Cooled HTPEM Fuel Cell in a Hybrid Electrical Vehicle

2019 ◽  
Vol 12 (1) ◽  
pp. 639-650 ◽  
Author(s):  
So̸ren J. Andreasen ◽  
Leanne Ashworth ◽  
Ian N. Remόn ◽  
Peder L. Rasmussen ◽  
Mads P. Nielsen
Keyword(s):  
Fuel Cell ◽  
Electrical Vehicle ◽  
Hybrid Electrical Vehicle
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