Distributed four-motor drive redundancy control method and system

CN122443232APending Publication Date: 2026-07-24VOYAH AUTOMOBILE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
VOYAH AUTOMOBILE TECH CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In distributed drive electric vehicles, when some motors fail or their capabilities are degraded, torque redistribution cannot be carried out in a timely and reasonable manner, affecting vehicle driving stability and safety.

Method used

By constructing a multi-objective cost function, including torque adjustment cost, system efficiency cost, and motor reserve capacity cost, the drive torque redistribution is optimized to meet the hard constraints of longitudinal drive and yaw differential, thus ensuring vehicle safety and stability.

Benefits of technology

When a single motor malfunctions, the target torque of each normal motor can be quickly and accurately determined to ensure the safety and stability of vehicle operation, while taking into account torque adjustment time, system energy consumption and motor capacity reserves.

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Abstract

The application discloses a distributed four-motor driving redundancy control method and system, relates to the technical field of vehicle driving control, and is applied to a distributed driving system. The distributed driving system comprises four motors. The method comprises the following steps: determining a longitudinal demand torque and a yaw differential torque of a vehicle based on an acceleration operation and a steering operation of a driver; if motor fault information of the vehicle represents single-motor abnormality, constructing a multi-target cost function based on multiple ones of original demand torques of the motors, motor rotating speeds, torque capacity limits, wherein the multi-target cost function comprises multiple ones of a torque adjustment cost sub-function, a system efficiency cost sub-function and a motor reserve capacity cost sub-function; determining target torques of normal motors based on the multi-target cost function, the longitudinal demand torque and the yaw differential torque, and controlling corresponding normal motors to perform driving output according to the target torques.
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