Motor Torque Cut-Off Control for Power Transmission Failures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor control systems in vehicles lack adequate safety mechanisms to prevent irreversible damage from unexpected power transmission failures, particularly in electrical and hybrid vehicles, leading to potential safety risks.
Innovation Solution
A motor control system with a vehicle control unit that detects unexpected power transmission failures and instructs the motor controller unit to stop outputting torque, incorporating redundancy and feedback mechanisms to ensure safe operation, using multiple transmission paths and redundant signals for enhanced reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional motor control system is used without additional safety mechanisms, then the device complexity is low, but the reliability is insufficient to prevent irreversible damage from unexpected power transmission failures
Solution Approach 1:
The patent implements preliminary action by establishing a safety mechanism that proactively monitors power transmission status and pre-prepares cut-off instructions before failures occur. The vehicle control unit continuously receives power transmission status information and is ready to issue cut-off commands to the motor controller unit, preventing irreversible damage before it happens rather than reacting after damage occurs.
Solution Approach 2:
The patent applies feedback by creating a closed-loop control system where the vehicle control unit receives real-time power transmission status information from the motor controller unit. This feedback mechanism allows the system to monitor the actual state of power transmission and adjust control commands accordingly, ensuring reliable detection of failures and timely cut-off actions to prevent damage.
2Reliability
If the motor controller unit independently determines torque output without external oversight, then the response speed is fast, but the reliability is compromised due to undetected failures
Solution Approach 1:
The patent introduces an intermediary mechanism by adding the vehicle control unit as a mediator between the motor controller unit and the power transmission system. The vehicle control unit receives power transmission status information, processes it according to safety requirements, and generates appropriate cut-off instructions. This intermediary layer ensures reliable failure detection and coordinated safety responses without significantly delaying the overall system response.
3Reliability
If no power transmission status monitoring is implemented, then the device complexity is low, but the reliability is insufficient to detect unexpected failures
Solution Approach 1:
The patent applies universality by designing the vehicle control unit to perform multiple functions: it manages overall vehicle control, processes power transmission status information, generates cut-off instructions, and coordinates communication between control units. This multi-functional approach allows the system to gain comprehensive failure detection capability without adding dedicated separate monitoring equipment, thereby limiting the increase in overall system complexity.
Data Source
AI summary
A motor control system and a vehicle. The motor control system includes: a vehicle control unit, configured to obtain vehicle state data and output an instruction for cutting off motor output torque when determining an unexpected power transmission failure according to the vehicle state data; and a motor controller unit, connected to the vehicle control unit, and configured to stop outputting motor control torque in response to the instruction for cutting off motor output torque.