scholarly journals Control Methods for Performance Improvement of an Integrated On-Board Battery Charger in Hybrid Electric Vehicles

Electronics ◽  
2021 ◽  
Vol 10 (20) ◽  
pp. 2506
Author(s):  
Yeongsu Bak ◽  
Ho-Sung Kang
Keyword(s):  
Performance Improvement ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Control Method ◽  
Control Methods ◽  
Battery Charger ◽  
Generator System ◽  
Battery Charging ◽  
Hybrid Electric ◽  
Starter Generator

This paper presents control methods for performance improvement of an integrated on-board battery charger (OBC) in hybrid electric vehicles (HEVs). HEVs generally consist of an OBC and a starter generator system (SGS). Since these each have a power conversion device for independent operation, such as battery charging and starter generator driving for engine starting, it necessarily increases the number of components, weight, and volume of the HEV. In order to overcome these disadvantages, recent research concerning the integrated OBC has progressed. Although it demands installation of power relays and an additional circuit, the integrated OBC is effectively operated for battery charging and starter generator driving. This paper proposes not only a harmonic reduction method of grid current, but also a feed-forward control method for performance improvement of the integrated OBC in HEVs. The effectiveness of the proposed control methods is verified by simulation and experimental results.

scholarly journals Single-Phase Bidirectional On-Board Charger Using Starter Generator System in Hybrid Electric Vehicles

Electronics ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 287 ◽  
Author(s):  
Seok-Min Kim ◽  
Ho-Sung Kang ◽  
Kyo-Beum Lee
Keyword(s):  
Hybrid Electric Vehicle ◽  
Single Phase ◽  
Reactive Power ◽  
Control Method ◽  
Combustion Engine ◽  
Control Methods ◽  
Generator System ◽  
Battery Charging ◽  
Hybrid Electric ◽  
Starter Generator

This paper presents the design and control methods of a single-phase bidirectional on-board charger (OBC) using a hybrid starter generator (HSG) and an inverter in a hybrid electric vehicle (HEV). In an HEV, there are a number of components, including the combustion engine, transmission, traction motor, motor controller, OBC, and HSG system. The proposed design reconfigures the HSG system to provide battery-charging capability instead of a conventional OBC based on the use of additional power relays. As a result, the number of power converters is effectively reduced through the replacement of the conventional OBC, and, thus, the power density is increased. This paper also proposes a control method for enabling not only battery charging but also a reactive power support depending on the grid command. Compared with a conventional reactive power compensation method, the proposed method has an advantage because it is located near the principal reactive power source. The simulation and experimental results verify the validity and feasibility of the proposed bidirectional OBC design and its control methods.

Design of a Switched Reluctance Generator Drive System for Hybrid Electric Vehicles

2010 ◽  
Vol 143-144 ◽  
pp. 1027-1030
Author(s):  
Ai Hua Wu ◽  
Jing Feng Mao ◽  
Guo Qing Wu ◽  
Zhi Li ◽  
Fei Zheng
Keyword(s):  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Control Method ◽  
Experimental System ◽  
Drive System ◽  
Switched Reluctance ◽  
Hybrid Electric ◽  
Set Up ◽  
Starter Generator ◽  
Charge Mode

In this paper, the design and implementation of a 12/10 poles 6-phase switched reluctance generator (SRG) drive system for hybrid electric vehicles (HEVs) is investigated. Firstly, the principle of the SRG, its control parameters and operation characteristics are analyzed. Then, according to the requirements of the SRG using as an integrated starter generator for HEVs, an optimized switch angle position with current chopping control method is proposed to regulate the SRG power output. In order to improve the charge performance and extend the service life, the lead-acid battery group uses a two-stage charge mode, which is realized by two digital power regulators of the SRG. After that, an experimental system is set up and the controller's internal circuit is described. At last, the proposed SRG drive system is verified by experimental results.

Steady-state and start-up transient responses of a belt-driven starter generator system for micro-hybrid electric vehicles

2021 ◽  
pp. 107754632110222
Author(s):  
Deyu Li ◽  
Hao Zhu ◽  
Weidong Zhu ◽  
Zao He ◽  
Biwen Zhou ◽  
...  
Keyword(s):  
Steady State ◽  
Dynamic Model ◽  
Electric Vehicles ◽  
Dry Friction ◽  
Hybrid Electric Vehicles ◽  
Generator System ◽  
Start Up ◽  
Hybrid Electric ◽  
Starting Process ◽  
Starter Generator

For micro-hybrid electric vehicles, the belt-driven starter generator system is a typical idle stop–start system that is used to substitute the traditional engine front-end accessory drive system. The aim of this work is to present a method to investigate steady-state and start-up transient responses of a typical belt-driven starter generator system with twin tensioner arms for micro-hybrid electric vehicles. A dynamic model of the belt-driven starter generator system is established for this scheme, where a smoothing dynamic friction model considering the velocity-weakening effect is presented to model the tensioner dry friction. Unlike some traditional dynamic models of the belt-driven starter generator system that the engine dynamics and dynamics of the belt-driven starter generator system are decoupled, an engine dynamic model, which is embedded in the dynamic model of the belt-driven starter generator system, is also established to calculate engine resistance torques at the engine starting process stage. Influences of the tensioner dry friction and stiffness on steady-state responses of the belt-driven starter generator system especially the stick–slip oscillations of the twin tensioner arms are examined. Angular oscillations and rotation speed variations of the belt-driven starter generator pulley and C/S pulley as well as the belt tension variations during the engine starting process are calculated. Influences of the tensioner dry friction and stiffness on transient dynamic performances of the belt-driven starter generator system during the engine starting process and its starting efficiency are investigated.

scholarly journals A Novel Control Method of Clutch During Mode Transition of Single-Shaft Parallel Hybrid Electric Vehicles

Electronics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 54 ◽  
Author(s):  
Jingang Ding ◽  
Xiaohong Jiao
Keyword(s):  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Control Method ◽  
Transition Process ◽  
Operating Mode ◽  
Mode Transition ◽  
Control Approach ◽  
Proportional Integral ◽  
Parallel Hybrid ◽  
Hybrid Electric

The mode transition of single-shaft parallel hybrid electric vehicles (HEVs) between engine and motor has an important impact on power and drivability. Especially, in the process of mode transition from the pure motor-drive operating mode to the only engine-drive operating mode, the motor starting engine and the clutch control problem have an important influence on driving quality, and solutions have a bit of room for improving dynamic performance. In this paper, a novel mode transition control method is proposed to guarantee a fast and smooth mode transition process in this regard. First, an adaptive sliding mode control (A-SMC) strategy is presented to obtain the desired torque trajectory of the clutch transmission. Second, a proportional-integral (PI) observer is designed to estimate the actual transmission torque of the clutch. Meanwhile, a fractional order proportional-integral-differential (FOPID) controller with the optimized control parameters by particle swarm optimization (PSO) is employed to realize the accurate position tracking of the direct current (DC) motor clutch so as to ensure clutch transmission torque tracking. Finally, the effectiveness and adaptability to system parameter perturbation of the proposed control approach are verified by comparison with the traditional control strategy in a MATLAB environment. The simulation results show that the driving quality of the closed-loop system using the proposed control approach is obviously improved due to fast and smooth mode transition process and better adaptability.

scholarly journals Model Predictive Control for Connected Hybrid Electric Vehicles

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Kaijiang Yu ◽  
Xiaozhuo Xu ◽  
Qing Liang ◽  
Zhiguo Hu ◽  
Junqi Yang ◽  
...  
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Electric Vehicles ◽  
Fuel Economy ◽  
Hybrid Electric Vehicle ◽  
Hybrid Electric Vehicles ◽  
Control Method ◽  
Fuel Efficiency ◽  
Computation Method ◽  
Hybrid Electric

This paper presents a new model predictive control system for connected hybrid electric vehicles to improve fuel economy. The new features of this study are as follows. First, the battery charge and discharge profile and the driving velocity profile are simultaneously optimized. One is energy management for HEV forPbatt; the other is for the energy consumption minimizing problem of acc control of two vehicles. Second, a system for connected hybrid electric vehicles has been developed considering varying drag coefficients and the road gradients. Third, the fuel model of a typical hybrid electric vehicle is developed using the maps of the engine efficiency characteristics. Fourth, simulations and analysis (under different parameters, i.e., road conditions, vehicle state of charge, etc.) are conducted to verify the effectiveness of the method to achieve higher fuel efficiency. The model predictive control problem is solved using numerical computation method: continuation and generalized minimum residual method. Computer simulation results reveal improvements in fuel economy using the proposed control method.

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