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Updated: Jun 13, 2026
08:59
Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
Published on: June 13, 2022
Note: Development of a compact electromagnetic hydraulic pump for a microrobot joint driving system
Naijian Chen1, Sun'an Wang, Jinhua Zhang
1School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China. chnjian@hotmail.com
The Review of Scientific Instruments
|May 6, 2010
Summary
A new electromagnetic hydraulic pump (EMHP) offers a compact solution for robot joint actuators. This innovative pump achieves high flow rates and stable pressure, enabling precise robotic movement.
Area of Science:
- Robotics Engineering
- Fluid Mechanics
- Electromagnetism
Background:
- Robot joint actuators require precise and stable hydraulic power.
- Existing micro-driving systems face limitations in performance and size.
Purpose of the Study:
- To introduce a novel compact electromagnetic hydraulic pump (EMHP).
- To develop a mathematical model for the EMHP integrating multiple physics domains.
- To evaluate the performance of the EMHP for robot joint actuator applications.
Main Methods:
- Development of a characteristic mathematical model incorporating electrical, magnetic, and hydraulic principles.
- Experimental testing of a prototype electromagnetic hydraulic pump.
Main Results:
- Achieved a volumetric flow rate of up to 430 cm³/min.
- Demonstrated a load pressure capability of up to 2.5 MPa.
- Prototype provided stable pressure (0-2.4 MPa) and acceleration (1.2 MPa/s) for robot joint actuators.
Conclusions:
- The developed EMHP is a viable micro-driving system component for robot joints.
- The integrated mathematical model accurately represents the pump's complex working principles.
- The EMHP meets key performance metrics for robotic actuation.
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