High power electrically-driven hydraulic actuator with clustered servo motor pumps

By using a cluster design of servo motor pumps, increasing the number of servo motor pumps and combining them with functional valve group oil circuits, the electrification and compact structure of ultra-high power hydraulic actuators are achieved. This solves the problem of ultra-high flow and power of traditional hydraulic actuators, and improves reliability and power output.

WO2026123708A1 Publication Date: 2026-06-18BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
Filing Date
2025-07-30
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing technologies struggle to produce ultra-high power electro-hydraulic actuators with power ratings of 100 kilowatts or higher, and also present challenges in developing ultra-high flow servo valves and ultra-high power hydraulic pump stations, failing to meet the requirements for heavy loads, impact resistance, and compact structures.

⚗Method used

It adopts a servo motor pump cluster design, which increases the number of servo motor pumps to 10 or more to form a motor pump cluster. Combined with functional valve group oil circuit and hydraulic cylinder, it realizes flow integration and power superposition. It adopts a modular integrated design to simplify the structure and improve reliability.

🎯Benefits of technology

It realizes the electrification of ultra-high power hydraulic actuators, with a compact structure, convenient installation, improved reliability and power output capability, and solves the problems of traditional valve-controlled hydraulic actuators.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to a high power electrically-driven hydraulic actuator with clustered servo motor pumps and a control method. The actuator comprises a host computer, a drive control module, a servo motor pump assembly, a functional valve manifold hydraulic circuit, and a hydraulic cylinder (10). The host computer is electrically connected to the drive control module, and the drive control module is electrically connected to the servo motor pump assembly. The servo motor pump assembly is connected to the hydraulic cylinder (10) via the functional valve manifold hydraulic circuit. The host computer issues a control command for forward rotation or reverse rotation to the drive control module, which drives the servo motor pump assembly to rotate forward or reversely, such that hydraulic fluid is driven into different chambers of the hydraulic cylinder (10) through the functional valve manifold hydraulic circuit, so as to extend or retract the hydraulic cylinder (10) and thus implement the extension or retraction of the actuator. The present application avoids the use of ultra-large-flow servo valves and ultra-high-power hydraulic pump stations, satisfies the requirements for electric actuators with power levels of 100 kW and above, and also features a high load capacity, a strong impact resistance, a compact structure, and electrification.
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