A control method for an electric slewing system based on a hydraulic system

By adding a pressure sensor to the slewing oil circuit of the hydraulic system and combining it with the vehicle controller to determine the working mode, the control problem when converting the hydraulic system to an electric slewing system was solved, realizing the safe and reliable conversion of the electric slewing system and reducing the development cycle and workload.

CN116145762BActive Publication Date: 2025-11-11JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD +1
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Patent Information

Application Number
CN202310074993.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-01-19
Publication Date
2025-11-11
Estimated Expiration
2043-01-19

AI Technical Summary

Technical Problem

In the electrification of engineering machinery, a key technical challenge is how to effectively control the existing hydraulic rotary motor using the existing hydraulic system without wasting resources.

Method used

The electric slewing system control method based on the hydraulic system is adopted. By installing a pressure sensor on the slewing oil circuit, pressure changes are monitored. Combined with the vehicle controller, the working mode is determined, and slewing mode, stationary mode, fault mode and mode switching control are formulated to achieve safe control of the electric slewing system.

Benefits of technology

While keeping the overall framework of the excavator unchanged, the electric slewing system was modified, reducing the development cycle and workload, and ensuring the safety and reliability of the electric slewing system.

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Abstract

This invention discloses a control method for an electric rotary system based on a hydraulic system. The method involves controlling the electric rotary system using a hydraulic system by adding a pressure sensor to the rotary oil circuit connected to the pilot valve to monitor pressure changes in the rotary oil circuit. The operating mode of the electric rotary system is determined by the pressure changes in the left and right rotary oil circuits. This invention provides a control method for an electric rotary system based on a hydraulic system. It adds an electric rotary mechanism to the existing hydraulic system to form an electric rotary system, and controls the electric rotary system. The control method is designed based on the pressure changes in different rotary oil circuits of the pilot valve in the hydraulic system, providing switching conditions and control methods for three different modes: rotary mode, stationary mode, and fault mode. This ensures the safety of the electric rotary system and reduces the development cycle and workload.
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