Research on Optimized Torque‐Distribution Control Method for Front/Rear Axle Electric Wheel Loader

Yang, Zhiyu; Wang, Jixin; Gao, Guangzong; Shi, Xiangyun

doi:10.1155/2017/7076583

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…Distributed electric wheel loader (DEWL) takes two motors respectively installed in front and rear part. However, there is few literature [17], [18] discussing about how to distribute the drive torques of front and rear motors which will result in that the motors work at high efficiency speed range so as to obtain energy saving, when DEWL is working. WL is a kind of multi-axles drive vehicle, in order to achieve a better overall drive adhesion effect, most diesel engine drive WLs [19] are equipped with a transfer case to transmit power to the front drive axle and the rear drive axle, due to their structural characteristics.…”

Section: Automotive Experiences 337mentioning

confidence: 99%

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Fei,

Shenrui,

Voon Wong

et al. 2023

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Multi-bridge centralized drive wheel loaders can produce parasitic power to waste energy and aggravate tire wear. Distributed Electric Wheel Loader(DEWL) is a new structure with two drive motors that can be controlled independently or in concert. Hence, this study investigates the mechanical characteristics of DEWL in its shoveling condition. Firstly, for the DEWL, dynamic models are established including running and shoveling conditions, on the basis of automobile theory. Secondly, a simplified structural model of DEWL is used to construct the mechanical equations, and the theoretical derivation is utilized to analyze the forces on wheels during different driving modes of running and shoveling conditions. Finally, the free shoveling of dry sands and gravel materials is tested by a ZL50GV-EV DEWL, and the drive forces of three drive modes on horizontal concrete pavement are tested. The results show that the parasitic power is generated when the driving motor has a larger speed than that of the other motor, which is caused by the movement of the loader's center of gravity. The driving torques generated by the motors are basically the same when the DEWL is in front-drive mode and rear-drive mode at the setting speed of 600rpm, whether it is running forward or backward, with a torque fluctuation of 0.16%-1.28% and a power fluctuation of 0.02%-1.29%. The DEWL consumes more power in dual-drive mode than in single drive if it is controlled in speed-target mode.

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Section: Automotive Experiences 337mentioning

confidence: 99%

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Fei,

Shenrui,

Voon Wong

et al. 2023

View full text Add to dashboard Cite

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“…Simulations on low friction coefficient roads confirm the effectiveness of the proposed control strategy. The driving torque of the front and rear motors can be independently controlled [103]. The goal is to maximize overall motor efficiency.…”

Section: Other Strategiesmentioning

confidence: 99%

Dual-Motor Dual-Source High Performance EV: A Comprehensive Review

Nguyen,

Nguyễn,

et al. 2023

Energies

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Electric vehicles (EVs) have been regarded as one of the promising alternatives to zero-emission transportation. New EV registrations have increased as a result of government policies and consumers’ awareness of climate change. Moreover, EV technology is being improved through ongoing research and development efforts. Among these, a powertrain with a combination of two electric motors has been proposed for high driving and efficiency performance. The study presents a comprehensive state-of-the-art review of architectures and energy distribution for a dual-motor equipped with dual-source EV system. In detail, various dual-motor configurations, and energy management strategies (EMSs) used in the literature are investigated and categorized. A comparison of the benefits and drawbacks of existing topologies and the EMSs of hybrid energy storage systems (HESSs) is also discussed. Following that, research gaps have been considered. This study can be used as a reference for researchers who are interested in the design and optimal control of the dual-motor dual-source EVs.

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“…Torque distribution research on electric vehicles covers topics ranging from two-axle drive [13,14] to four-wheel independent drive [15][16][17]. In these research fields on EWLs, Yang et al [18] utilized a group of nonlinear constraint optimization algorithms on the longitudinal dynamics model of EWLs, revealing heightened energy efficiency and improved performance through simulation. Gao et al [19] employed an unscented Kalman filter to estimate the shoveling load, enabling the calculation of vertical forces on tires.…”

Section: Introductionmentioning

confidence: 99%

“…However, in [19], the drive force of wheels was not taken into consideration, which is a vital factor of the shoveling effect. In [18] and [20], they did not test on any EWLs in practical working environments.…”

Section: Introductionmentioning

confidence: 99%

Design and Testing of Innovative Type of Dual-Motor Drive Electric Wheel Loader

Fei,

Han,

Wong

et al. 2024

Energies

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The electric wheel loader is a new prototype in powertrains and drivetrains that saves energy consumption and diminishes emissions as earthmoving machinery. Dual-motor drive in the front and rear axles of electric wheel loaders helps the distribution of drive torque. However, challenges arise during shoveling conditions, particularly when one motor generates torque exceeding the ground’s adhesion force, leading to tire slippage. This study thoroughly examines the mechanical structure of the working unit and elucidates the correlation between wheel load and hydraulic pressure in the base chamber of the tilt cylinder. This analysis is accomplished through a combination of theoretical derivations and experimental tests. The experiments involve a 5 ton rated load electric wheel loader tested across five running cases as well as weighing tests on a 15 ton rated load electric wheel loader. Based on the experiment discoveries, a dual-motor drive electric wheel loader is designed with specific transmission ratios for the front and rear drivetrains, and a torque distribution strategy is proposed based on wheel load during shoveling. Running condition tests demonstrate sufficient drive force for the new electric wheel loader, and shoveling tests reveal a significant reduction in tire slippage when employing the proposed torque distribution strategy compared to evenly distributed torque in the front and rear axles. Moreover, the driving force during the shoveling process remains undiminished. This indicates that the newly designed loader, in conjunction with the proposed strategy, exhibits excellent shoveling efficiency.

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Research on Optimized Torque‐Distribution Control Method for Front/Rear Axle Electric Wheel Loader

Cited by 11 publications

References 21 publications

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Dual-Motor Dual-Source High Performance EV: A Comprehensive Review

Design and Testing of Innovative Type of Dual-Motor Drive Electric Wheel Loader

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