Motor Efficiency Investigation Using Nameplate Data and Model Lookup
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Solution Overview
Problem
Existing methods for determining motor efficiency are laborious and time-consuming, and there is a need for improved speed and accuracy in loss estimation.
Innovation Solution
A method and device that utilize name plate data to identify motor type, check for measured efficiency data, and if unavailable, determine simulated efficiency data using a model, considering nominal name plate efficiency, and apply it in a power conversion loss function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional bespoke models are used to determine motor efficiency, then accuracy of efficiency determination is improved, but time consumption and labor increase
Solution Approach 1:
The patent pre-calculates and stores efficiency characteristics for different motor types in a database before actual investigation. When investigating a motor, the system quickly retrieves pre-computed efficiency data based on motor type identification, avoiding time-consuming bespoke model calculations while maintaining accuracy through pre-validate ed models
Solution Approach 2:
The patent creates simplified copies of complex efficiency models for different motor types. Instead of building custom models each time, the system uses pre-established model representations stored in database (26), which can be quickly applied to investigate efficiency without repeating the complex model development process
2Productivity
If name plate information is used in equivalent circuit to calculate efficiency, then calculation speed is improved, but accuracy of efficiency determination deteriorates
Solution Approach 1:
The patent introduces an intermediary database layer between name plate information and efficiency calculation. The database stores pre-processed efficiency characteristics that bridge the gap between simple name plate data and accurate efficiency models, enabling both fast retrieval and high accuracy through the intermediary stored data
Solution Approach 2:
The patent transforms name plate parameters into efficiency characteristics through pre-computed relationships stored in the database. By changing parameters from raw name plate specifications to pre-calculated efficiency values, the system achieves both speed (through direct lookup) and accuracy (through pre-validated transformations)
3Measurement precision
If measured efficiency data is collected for all motor types, then accuracy of loss estimation is improved, but data storage requirements and system complexity increase
Solution Approach 1:
The patent segments efficiency data by motor types and stores them as separate, organized records in the database. This segmentation allows the system to manage complex data through structured categorization, enabling accurate retrieval for specific motor types while maintaining organized, manageable system complexity through clear data division
Data Source
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AI summary
A method of investigating a motor comprises: obtaining (S100) name plate data of the motor, the name plate data comprising a nominal name plate efficiency (ηNP_nom) of the motor or the nominal name plate efficiency (ηNP_nom) of the motor being derivable from the name plate data, identifying (S102) the motor type based on the name plate data, checking (S104) if there exists measured efficiency data for the motor type, setting (S106), if measured efficiency data exists for the motor type, the measured efficiency data as investigating data for the motor, determining (S108) simulated efficiency data using a model (CM) of the motor and setting (S110) the simulated efficiency data as investigating data for the motor, if the measured efficiency data does not exist for the motor, where the nominal name plate efficiency (ηNP_nom) is considered in the use of the model, and investigating (S112; S220) the motor using the investigating data.