Abstract To improve the efficiency of construction machinery driven by pure electric power and to reduce energy consumption, a variable-pressure differential control strategy based on variable-speed control for a quantitative pump load-sensing system is proposed. The scheme of quantitative pump load sensing system based on variable speed control is introduced. The advantages, control objectives, and control strategies of the proposed control system are analyzed in different working conditions using simulations and experiments. The results show that the proposed variable-pressure differential control strategy can substantially reduce energy consumption. In the no-load mode, the power consumption of the proposed system was approximately 33.3% lower than that of the traditional system. During the idle mode, the proposed system consumed no energy, while the traditional system consumed about 0.6 kW. The energy saving of the main pump in the low-speed and low-flow-rate case was about 38%. In the lifting and pressure-holding case, the motor of the proposed system consumed 17.3% less power than that of the traditional system. In all test conditions, the proposed system demonstrated a good energy-saving ability. In addition, the proposed system has a high response rate and smooth operation across different working conditions, which demonstrates good control performance.

中文翻译：

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基于变速控制的工程机械电驱动动力总成控制

摘要 为提高纯电力驱动工程机械的效率，降低能耗，提出了一种基于变速控制的定量泵负荷传感系统的变压差控制策略。介绍了基于变速控制的定量泵负荷传感系统方案。所提出的控制系统的优势、控制目标和控制策略在不同的工作条件下使用仿真和实验进行了分析。结果表明，所提出的变压差控制策略可以显着降低能耗。在空载模式下，所提出系统的功耗比传统系统低约33.3%。在空闲模式期间，所提出的系统不消耗能量，而传统系统的功耗约为 0.6 kW。主泵在低速低流量情况下节能约38%。在提升和保压情况下，所提出系统的电机消耗的功率比传统系统少 17.3%。在所有测试条件下，所提出的系统都表现出良好的节能能力。此外，所提出的系统在不同的工作条件下具有高响应率和平稳运行，显示出良好的控制性能。所提出的系统显示出良好的节能能力。此外，所提出的系统在不同的工作条件下具有高响应率和平稳运行，显示出良好的控制性能。所提出的系统显示出良好的节能能力。此外，所提出的系统在不同的工作条件下具有高响应率和平稳运行，显示出良好的控制性能。