Inverter Control Apparatus Selective Failure Data Storage
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Solution Overview
Problem
Conventional inverter control systems face limitations in storing comprehensive inverter status data during failures, which hampers accurate failure diagnosis due to preset data limitations in the failure history storage part.
Innovation Solution
An apparatus with a volatile storage part for real-time data logging, a nonvolatile storage part for failure history, and a control part that selectively stores specific data based on failure types, allowing for dynamic data selection and storage in the nonvolatile part for detailed failure analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all inverter status data are stored in the failure history storage part, then complete failure diagnosis information is available, but the limited memory capacity of the failure history storage part cannot accommodate all data
Solution Approach 1:
The patent segments the storage system into three distinct parts: a first storage part for real-time status data, a second storage part for failure history, and a third storage part for configuration data. This segmentation allows each storage part to have optimized capacity for its specific purpose, resolving the contradiction between storing all data and limited memory capacity.
Solution Approach 2:
The patent extracts only the necessary failure-related data from the first storage part and transfers it to the second storage part when a failure occurs. This extraction approach ensures that the limited capacity of the second storage part is used efficiently while still capturing all essential failure diagnosis information.
2Device complexity
If preset data types are stored in the failure history storage part, then storage structure is simple, but diverse failure diagnosis requirements cannot be met
Solution Approach 1:
The patent introduces dynamic configurability through the third storage part, which stores configuration data indicating what types of data should be stored in the second storage part based on the specific failure type. This allows the storage system to adapt dynamically to different failure scenarios while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent changes the parameter of data selection based on failure type by reading configuration data from the third storage part. This parameter change approach allows the same storage structure to serve multiple failure diagnosis needs by adjusting which data are transferred to the failure history storage part.
Data Source
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AI summary
An apparatus (2) for controlling an inverter includes a volatile, first storage part (20); a nonvolatile, second storage part (30); and a control part (10) configured to store data related to the status of the inverter in the first storage part when the inverter is driven and configured to select some of the data stored in the first storage part depending on the type of failure event when a failure event occurs and store the selected data in the second storage part.