scholarly journals Convex modeling for optimal battery sizing and control of an electric variable transmission powertrain

2019 ◽  
Vol 74 ◽  
pp. 25 ◽  
Author(s):  
Zetao Ma ◽  
Nikolce Murgovski ◽  
Bo Egardt ◽  
Shumei Cui
Keyword(s):  
Energy Management ◽  
Hybrid Electric Vehicle ◽  
Electric Machines ◽  
Bilevel Program ◽  
Model Control ◽  
Power Split ◽  
Variable Transmission ◽  
Optimal Energy Management ◽  
And Control ◽  
Electric Mode

This paper provides convex modeling steps for the problem of optimal battery sizing and energy management of a plug-in hybrid electric vehicle with an electric variable transmission. Optimal energy management is achieved by a switched model control, with driving modes identified by the engine on/off state. In pure electric mode, convex optimization is used to find the optimal torque split between two electric machines, in order to maximize powertrain efficiency. In hybrid mode, optimization is performed in a bilevel program. One level optimizes speed of a compound unit that includes the engine and electric machines. Another level optimizes the power split between the compound unit and the battery. The proposed method is used to minimize the total cost of ownership of a passenger vehicle for a daily commuter, including costs for battery, fossil fuel and electricity.

Modeling and optimal energy management of a power split hybrid electric vehicle

2016 ◽  
Vol 60 (5) ◽  
pp. 713-725 ◽  
Author(s):  
DeHua Shi ◽  
ShaoHua Wang ◽  
Pierluigi Pisu ◽  
Long Chen ◽  
RuoChen Wang ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Energy Management ◽  
Hybrid Electric Vehicle ◽  
Optimal Energy ◽  
Power Split ◽  
Optimal Energy Management ◽  
Hybrid Electric

scholarly journals Power Flows in Compound Transmissions for Hybrid Vehicles

Machines ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 19 ◽  
Author(s):  
Stefano De Pinto ◽  
Giacomo Mantriota
Keyword(s):  
Hybrid Electric Vehicle ◽  
High Performance ◽  
Fuel Efficiency ◽  
Hybrid Vehicles ◽  
Operating Conditions ◽  
Preliminary Design ◽  
High Fuel Efficiency ◽  
Power Split ◽  
Variable Transmission ◽  
And Control

Hybrid electric vehicle (HEV) traction systems are the most promising technologies being characterized by high performance, high fuel efficiency, low emissions and long operating range. Significant improvements can be achieved equipping transmissions with variable transmission ratio such as power-split transmission and a compound power-split electric continuously variable transmission (eCVT). These systems have been introduced to improve vehicle global efficiency since they can maximize the efficiency in different operating conditions. Optimal design and control of these systems leads improvements in vehicles performance and mathematical models, which support the preliminary design phase, can play a key role in this field. In this work, the internal power circulations of “four-port-mechanical-power split device are determined through a dynamic analysis.” Finally, the efficiency of the compound transmission is analytically evaluated, assuming that the overall losses are linked to the eCVT variator.

scholarly journals Modeling and energy management strategy research of a power-split hybrid electric vehicle

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096262
Author(s):  
Yupeng Zou ◽  
Ruchen Huang ◽  
Xiangshu Wu ◽  
Baolong Zhang ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Energy Management ◽  
Fuel Economy ◽  
Hybrid Electric Vehicle ◽  
Research Work ◽  
Energy Management Strategy ◽  
Power Sources ◽  
Power Split ◽  
Hybrid Electric ◽  
The Impact

A power-split hybrid electric vehicle with a dual-planetary gearset is researched in this paper. Based on the lever analogy method of planetary gearsets, the power-split device is theoretically modeled, and the driveline simulation model is built by using vehicle modeling and simulation toolboxes in MATLAB. Six operation modes of the vehicle are discussed in detail, and the kinematic constraint behavior of power sources are analyzed. To verify the rationality of the modeling, a rule-based control strategy (RB) and an adaptive equivalent consumption minimization strategy (A-ECMS) are designed based on the finite state machine and MATLAB language respectively. In order to demonstrate the superiority of A-ECMS in fuel-saving and to explore the impact of different energy management strategies on emission, fuel economy and emission performance of the vehicle are simulated and analyzed under UDDS driving cycle. The simulation results of the two strategies are compared in the end, shows that the modeling is rational, and compared with RB strategy, A-ECMS ensures charge sustaining better, enables power sources to work in more efficient areas, and improves fuel economy by 8.65%, but significantly increases NOx emissions, which will be the focus of the next research work.

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