Proposition and Evaluation of a Multi-Link Full Electric Excavator Model

2021 ◽  
Vol 2021 (0) ◽  
pp. 2P1-A17
Author(s):  
Lee Sanghyuk ◽  
Osuka Kouichi ◽  
Youjirou Ohbatake
Keyword(s):  
Electric Excavator

Scheme Based on Economic Analysis of Energy Consumption about Lithium-Electric Excavator Hydraulic System

2015 ◽  
Vol 741 ◽  
pp. 558-562
Author(s):  
Yong Zhi Ma ◽  
Qing Song Hua ◽  
Zhen Yu Huang ◽  
Tie Zhu Zhang
Keyword(s):  
Energy Consumption ◽  
Economic Analysis ◽  
Lithium Ion Battery ◽  
Hydraulic System ◽  
Computational Analysis ◽  
Lithium Ion ◽  
Total Efficiency ◽  
Heavy Industry ◽  
Electric Excavator ◽  
The Cost

The Lithium-electric Excavator Hydraulic System (Li-EEHS) is based on economic analysis of energy consumption, and it has changed the excavator counterweight into Lithium-ion Battery in order to replace the engine. A computational analysis which takes the Qingdao heavy industry excavator HW130 as the example demonstrates the accessibility of the scheme. The total efficiency of the excavator has been improved from 7% to 17.1% by the Li-EEHS without energy regeneration, while the cost has been decreased from 750¥/day into 240¥/day. And the cost recovery will take around 3.3 years (about 500,000¥).The article typically analyzes the system scheme and the working features for 4 major Li-EEHS.

scholarly journals Research on Constant Power Control Strategy of Pure Electric Excavator

2020 ◽  
Vol 10 (21) ◽  
pp. 7599
Author(s):  
Tong Guo ◽  
Tianliang Lin ◽  
Qihuai Chen ◽  
Haoling Ren ◽  
Shengjie Fu
Keyword(s):  
Power Control ◽  
Output Power ◽  
Control Strategy ◽  
Power Source ◽  
Hydraulic Pump ◽  
Constant Power ◽  
Large Power ◽  
Piecewise Constant ◽  
Construction Machinery ◽  
Electric Excavator

Electric construction machinery can achieve zero emissions and be pollution free in the process of construction. In an electric excavator, to make full use of the output power of the power source, the output power of the electric motor (EM) should be absorbed by a hydraulic pump on the most attainable level. Therefore, constant power control is generally employed to achieve power matching between the power source and hydraulic pump. In this paper, considering the shortcomings of a single constant power point in a traditional load sensing system of electric construction machinery, combining the discharge characteristics of the li-ion battery and the overload capability of EM, a piecewise constant power control strategy is proposed to realize the organic unity of power and safety for a novel electric construction machinery power train system. The control strategy is verified by simulations and experiments. The results show that the system can not only satisfy the large power output but also ensure the normal and stable operation of the system when the electric excavator meets the heavy load through the piecewise constant power control. The proposed control strategy improves the dynamic performance of the system on the basis of ensuring the safety of the system.

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