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Control of electric drive powertrain based on variable speed control in construction machinery

机译：基于施工机械变速控制的电动驱动动力控制

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摘要

To improve the efficiency of construction machinery driven by pure electric power and to reduce energy con-sumption, 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.
机译：为了提高纯电力驱动的施工机械的效率并降低能量消耗，提出了一种基于定量泵测量系统变速控制的可变压差控制策略。介绍了基于变速控制的定量泵负荷传感系统方案。使用模拟和实验在不同的工作条件下分析所提出的控制系统的优点，控制目标和控制策略。结果表明，所提出的可变压差控制策略可以大大降低能耗。在空载模式下，所提出的系统的功耗大约比传统系统的功耗约为33.3％。在空闲模式期间，所提出的系统不会消耗能量，而传统系统则消耗约0.6千瓦。在低速和低流量壳体中主泵的节能约为38％。在提升和压力保持箱中，所提出的系统的电动机比传统系统的功率低17.3％。在所有测试条件下，所提出的系统表现出良好的节能能力。此外，所提出的系统具有高响应率和跨不同工作条件的平稳操作，这表明了良好的控制性能。

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