摘要
液压驱动是重载机器人主要的驱动方式,液压泵的性能直接决定液压系统的驱动能力和品质,而液压泵驱动电路的设计至关重要,特别是在电流精准控制方面。Howland恒流源因其高精度和稳定性,在多个领域得到了广泛应用。在传统Howland电流源基础上,分析相关电路的工作原理及负载能力,设计一种高压大电流的恒流源作为液压泵驱动电路,通过仿真与实际测量验证了可靠性。相比于传统设计,所创新的恒流源将输出界限大大提高,实现0~5 V可调输出、最大负载电流5 A的驱动能力。同时,绝对误差仿真值仅为0.005 A,实物电路测量值绝对误差仅为0.1 A。本研究针对实际工程应用实现精度良好、负载能力强、输出电流稳定,为高压大电流精密驱动提供了兼具高线性吻合度特性与工程实用性的解决思路。
Hydraulic drive is the primary drive method for heavy-duty robots.The performance of hydraulic pumps directly determines the driving capability and quality of hydraulic systems,and the design of hydraulic pump drive circuits is of critical importance,particularly in terms of precise current control.The Howland current source is widely used in various fields due to its high precision and stability.Based on the traditional Howland current source,this paper analyzes the working principle and load capacity of the related circuit,designs a high voltage and high current constant current source to serve as the hydraulic pump drive circuit,and verifies its reliability through simulation and actual measurement.Compared with traditional designs,the innovative constant current source in this paper greatly improves the output limit,achieving 0~5 V adjustable output and a maximum load current driving capacity of 5 A.Meanwhile,the absolute error of the simulation value is only 0.005 A,and that of the physical circuit measurement value is only 0.1 A.This research realizes high precision,strong load capacity and stable output current for practical engineering applications,provides a solution with high linear consistency and engineering practicability for high voltage and high current precision driving.
作者
梁建红
杨依桂
古涛
雷鸿
王鹏飞
LIANG Jian-hong;YANG Yi-gui;GU Tao;LEI Hong;WANG Peng-fei(School of Electronic Information and Electrical Engineering,Chengdu University,Chengdu 610106;School of Overseas Education,Chengdu University,Chengdu 610106)
出处
《制造业自动化》
2025年第12期45-53,共9页
Manufacturing Automation
