Multi-Motor Wheel Drive Control Under Motor Failure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric vehicles with multiple motors for wheel driving face significant degradation in mobility when one or more motors fail, leading to unstable traveling conditions.
Innovation Solution
An electric moving machine with a driving-unit control device that detects motor errors, stops affected motors, determines a balance-improving combination of healthy motors, and controls their operation to maintain stable travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple traveling motors are used to drive multiple wheels, then the moving capability and power are improved, but the reliability deteriorates because the system becomes vulnerable to motor failures
Solution Approach 1:
The control device dynamically changes the operating parameters by detecting motor errors and adjusting the driving force distribution among remaining healthy motors. When a motor error is detected, the system modifies the driving parameters of other motors to compensate for the failed motor, maintaining overall traveling capability and stability without requiring physical hardware changes.
2Stability of the object's composition
If all traveling motors are operated to maintain balance of driving force, then the traveling stability is improved, but the complexity of control increases when motor errors occur
Solution Approach 1:
The control device implements a feedback mechanism by continuously monitoring the operating status of each traveling motor. When a motor error is detected, the system receives feedback about the failed motor and automatically adjusts the driving force distribution among remaining motors to maintain balance. This feedback-based approach simplifies control complexity by providing automated error handling rather than requiring complex pre-programmed control strategies.
3Reliability
If traveling motors with errors are stopped to prevent further damage, then the reliability of remaining motors is improved, but the moving capability deteriorates
Solution Approach 1:
The control device temporarily discards the functionality of failed motors by stopping their operation to prevent further damage, while simultaneously redistributing the driving load to healthy motors. This allows the system to recover traveling capability using remaining functional components. The approach enables the vehicle to continue operating with reduced but sufficient mobility, and the failed motors can be replaced later without complete system shutdown.
Data Source
AI summary
Provided is an electric moving machine including: a plurality of wheels provided to a vehicle body; traveling motors each provided for the corresponding wheel and configured to drive the corresponding wheel; and a driving-unit control device configured to control driving of each of the traveling motors, in which the driving-unit control device, in a case in which an error is detected in one or some of the traveling motors during traveling, stops the traveling motors with an error detected, determines a combination of traveling motors to improve a balance of driving force in a traveling direction which broke due to the stopping of the traveling motors, and controls, based on the combination, driving of each of the traveling motors with no error detected.