Generation Mechanism Analysis and Calculation Method of Loader
                    Parasitic Power Based on Tire Radius Difference

Yang, Zhiyu; Liu, Shuang; Yunlong, Wan; Han, Yong Sheng

doi:10.4271/2022-01-5102

SAE Technical Paper Series

2022

DOI: 10.4271/2022-01-5102

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Generation Mechanism Analysis and Calculation Method of Loader Parasitic Power Based on Tire Radius Difference

Zhiyu Yang¹,

Shuang Liu²,

Wan Yunlong³

et al.

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Cited by 2 publications

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“…Consequently, DEWLs effectively revert to CEWLs. According to Yang, Z. et al, CEWLs generate parasitic power due to steering radius differences, tire radius differences, ground conditions, and actual working conditions [10,11]. When continuously driving for one hundred kilometers under a 5-ton standard block load with parasitic power generation, the power consumption loss accounts for nearly one-fifth of the battery capacity, highlighting the considerable negative impact of parasitic power on loaders.…”

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confidence: 99%

Energy-Saving Impact and Optimized Control Scheme of Vertical Load on Distributed Electric Wheel Loader

Shen,

Han,

Fei

et al. 2024

WEVJ

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During the operation of a wheel loader, the external load acting on the bucket undergoes many changes, resulting in significant changes in the load ratio on the front and rear axles. For this reason, controlling a standard wheel loader is not trivial. In addition, in the case of a distributed electric wheel loader (DEWL), the operating control algorithm is often complex and is, therefore, the subject of optimization studies. This study compared the electric power consumption across different vertical loads, speeds, and travel directions for single-front, single-rear, and dual-motor configurations, both during transporting and pre-shoveling operations. The analysis led to the development of control rules based on energy-saving objectives. Under the shoveling condition, it was observed that vertical loads can lead to an insufficient driving force and skidding, necessitating the proposal of a new optimized control scheme. The results revealed that the optimal solution for transporting is the single-motor drive control scheme without a mechanical connection between the front and rear motor. With the single-motor control scheme, comparing the preferred controlled motor with the unselected motor under different loads, the average electrical power savings for forward, backward, and circling were at least 3.51%, 3.12%, and 0.34%, respectively. Under the pre-shoveling condition, the optimal control scheme was identified as the single rear motor control scheme, effectively reducing electrical power consumption. In response to the issues encountered during the shoveling condition, an economical solution involving the modification of the front axle transmission ratio has been proposed, along with an optimized control scheme based on vertical load variations.

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confidence: 99%

Energy-Saving Impact and Optimized Control Scheme of Vertical Load on Distributed Electric Wheel Loader

Shen,

Han,

Fei

et al. 2024

WEVJ

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show abstract

Efficiency Comparison of Electric Wheel Loader Powertrains with Dual Motor Input in Distributed Driving Modes

Fei,

Han,

Wong

et al. 2023

WEVJ

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The presented research on electric wheel loaders lacks a detailed analysis of drive energy-saving during the shovel preparation phase, which is characterized by a high probability of loader tire skidding. To address this issue, this study examines the energy consumption efficiency of a two-motor distributed drive wheel loader under three drive modes including front motor drive, rear motor drive, and dual-motor drive, taking into account the change in the drive force demand caused by the bucket landing. This study finds that the motor energy conversion efficiency is the greatest in single-motor drive mode when the bucket does not generate positive pressure with the ground. In dual-motor drive mode, the total torque overcome is greater, but the motor energy conversion efficiency is the greatest when the bucket generates the greatest positive pressure with the ground. This study suggests that in future designs of electric loaders, two motors can be used to distribute the drive, but the front and rear motors should be designed to participate in the drive with a certain torque distribution ratio at different speeds and resistance to avoid the phenomenon of the bucket pressing the ground too much.

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Generation Mechanism Analysis and Calculation Method of Loader Parasitic Power Based on Tire Radius Difference

Cited by 2 publications

References 13 publications

Energy-Saving Impact and Optimized Control Scheme of Vertical Load on Distributed Electric Wheel Loader

Energy-Saving Impact and Optimized Control Scheme of Vertical Load on Distributed Electric Wheel Loader

Efficiency Comparison of Electric Wheel Loader Powertrains with Dual Motor Input in Distributed Driving Modes

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