Motor Controller Peak Temperature Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrical apparatuses that store temperature and time data in non-volatile memory at regular intervals face reduced service life due to frequent writing, and may lose temperature information during sudden power failures, leading to temperature calculation errors.
Innovation Solution
An electrical apparatus with a controller that calculates the motor's peak temperature and stores it along with the absolute time when the motor switches from a driven to a stopped state, allowing for accurate temperature calculation after power loss while reducing the number of data writings, thus minimizing errors and extending the non-volatile memory's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature and time are written in the non-volatile memory at regular time intervals, then the temperature calculation accuracy after power failure is improved, but the service life of the non-volatile memory is reduced due to frequent data writing
Solution Approach 1:
The patent extracts only the critical temperature data point (peak temperature at motor stoppage) from the continuous temperature monitoring process and stores it in non-volatile memory. This selective extraction eliminates the need for continuous regular-interval writing while preserving the essential information needed for accurate temperature calculation after power failure, thereby resolving the contradiction between measurement precision and memory service life.
Solution Approach 2:
The system performs preliminary action by detecting and storing the peak temperature at the moment of motor stoppage before any potential power failure occurs. This advance preparation ensures that the most critical temperature information is captured and preserved in non-volatile memory, eliminating the need for subsequent frequent writing operations while maintaining temperature calculation accuracy.
2Duration of action of stationary object
If the writing interval of temperature and time is extended to reduce data writing frequency, then the service life of non-volatile memory is improved, but temperature information may be lost during sudden power failure
Solution Approach 1:
The patent extracts the critical moment of motor stoppage as the specific timing for temperature measurement and storage. By focusing on this key event rather than using extended regular intervals, the system ensures that the most important temperature information (peak temperature) is captured and stored in non-volatile memory, maintaining reliability while minimizing writing frequency to extend memory service life.
Solution Approach 2:
The system uses the motor's own operational state (driven vs. stopped) to trigger the temperature measurement and storage process. The motor's stoppage event automatically triggers the peak temperature detection and storage in non-volatile memory, creating a self-regulating mechanism that ensures critical information is captured without requiring external timing control or frequent writing operations.
3Reliability
If data writing is performed frequently to ensure temperature information is stored, then the reliability of temperature calculation is improved, but the number of writing operations increases reducing memory durability
Solution Approach 1:
The patent extracts only the essential peak temperature data at motor stoppage for storage in non-volatile memory, eliminating the need for frequent writing operations. This selective approach maintains temperature calculation reliability by capturing the most critical information point while significantly reducing the number of writing operations, thereby preserving memory durability and extending its operational lifespan.
Data Source
AI summary
An electrical apparatus mounting a motor includes a controller and an electrically data rewritable non-volatile storage. The controller is configured to execute: a temperature calculation process in which in a case that a state of the motor is switched from a driven state to a stopped state, the controller calculates a temperature of the motor based on rotation of the motor; and a temperature storing process in which the controller stores, in the storage, the temperature, which has been calculated at the time of the switch operation in the temperature calculation process, as a peak temperature, together with an absolute time clocked at the time of the switch operation.