Vehicle Motor Module Emergency Inching Without Stored Parameters
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Solution Overview
Problem
Motor modules for vehicle-mounted devices, such as power windows, face challenges in safely operating the devices when parameter information is not stored due to failures, leading to impaired user convenience and safety concerns.
Innovation Solution
The motor module includes a parameter learning process to receive and store specialized parameter information from a management module via a network, and an inching process to drive the motor for a certain period with maximum torque in case of parameter information absence, ensuring safe and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If parameter information is stored in the memory for normal operation, then the operation reliability is improved, but the device cannot operate safely when parameter information is lost due to failures
Solution Approach 1:
The control unit preliminarily determines whether parameter information is stored in the memory before normal operation. When parameter information is absent, the control unit preliminarily prepares an emergency operation mode (inching process) as a backup solution, allowing the device to switch to maximum torque operation for a certain period to ensure safety in emergency situations.
Solution Approach 2:
The motor module dynamically switches between normal operation mode (using stored parameter information) and emergency operation mode (inching process with maximum torque). The control unit monitors the presence of parameter information and adjusts the operation mode accordingly, enabling the system to adapt to different operational conditions and maintain safety.
2Reliability
If the motor outputs maximum torque for a certain period in emergency mode, then user safety is improved, but energy consumption increases
Solution Approach 1:
The control unit implements periodic action by limiting the maximum torque output to a certain predetermined period. After this period expires, the control unit stops the motor even if the operation signal continues, preventing continuous high energy consumption while ensuring safety during the critical emergency period.
Solution Approach 2:
The system provides beforehand cushioning by preparing an emergency operation mode that activates only when parameter information is lost. This emergency mode with maximum torque is designed as a temporary safety measure for a predetermined period, cushioning the impact of parameter loss while limiting energy consumption through time-based restrictions.
3Reliability
If the control unit monitors parameter information continuously, then operation safety is improved, but the device complexity increases
Solution Approach 1:
The control unit performs self-service by autonomously determining whether parameter information is stored in the memory and automatically switching between normal operation mode and emergency operation mode. This self-diagnosis and self-adjustment capability improves operation safety without requiring additional complex monitoring systems or external intervention.
Data Source
AI summary
A motor module includes: a motor; a driving unit; a control unit; a memory; and a communication unit. The control unit executes: receiving parameter information specialized for a vehicle-mounted device by the communication unit from a management module, and storing the parameter information in the memory; in a case where the parameter information is stored in the memory, driving the motor by the driving unit to operate the vehicle-mounted device so that the motor outputs a predetermined torque based on an operation signal input from an outside for operating the vehicle-mounted device and the parameter information; and in a case where the parameter information is not stored in the memory, driving the motor by the driving unit for a certain period of time and then stopping the motor to inch the vehicle-mounted device so that the motor outputs a maximum torque, based on the operation signal.