Motor Efficiency Investigation Using Nameplate and Lookup Data
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Solution Overview
Problem
Conventional methods for determining motor efficiency are laborious and time-consuming, and there is a need for improved speed and accuracy in loss estimation for energy saving analyses.
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 using a model considering nominal name plate efficiency, with options for using classification standard efficiency if necessary, to accurately and quickly estimate motor efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional bespoke models are used to determine motor efficiency, then accuracy can be maintained, but the process becomes laborious and time consuming
Solution Approach 1:
The system performs preliminary actions by pre-calculating and storing efficiency characteristics in lookup tables during the manufacturing or design phase. During operation, the investigating device simply queries these pre-computed tables using motor parameters from the name plate, eliminating the need for time-consuming real-time model calculations while maintaining accuracy.
Solution Approach 2:
The invention creates simplified copies of complex efficiency models in the form of lookup tables that contain pre-computed efficiency data. These tables replicate the behavior of detailed motor models but can be queried instantaneously, providing a fast alternative to running full electromagnetic models during motor investigation.
2Productivity
If name plate information is used in an equivalent circuit model, then calculation speed improves, but there is still room for improvement in determining efficiency accuracy
Solution Approach 1:
The lookup table acts as an intermediary between the motor's name plate parameters and the efficiency determination. Instead of directly using equivalent circuit models or raw name plate data, the system queries pre-computed efficiency characteristics from the lookup table, which mediates between simple data input and accurate efficiency output, improving both speed and accuracy.
3Measurement precision
If measured efficiency data is available for the motor type, then accuracy is maximized, but the system complexity increases due to data management requirements
Solution Approach 1:
The lookup table structure is designed to be universal, serving multiple functions: storing measured efficiency data, containing simulated efficiency data, and providing a unified interface for both data types. This multi-functionality reduces the need for separate data management systems for different data types, simplifying overall system complexity while maintaining the ability to use the most accurate data available.
Data Source
AI summary
A method of investigating a motor comprises obtaining name plate data comprising a nominal efficiency of the motor, identifying the motor type based on the name plate data, checking whether measured efficiency data for the motor type exists; when measured efficiency data exists for the motor type, setting the measured efficiency data as investigating data for the motor, and determining simulated efficiency data using a model of the motor and setting the simulated efficiency data as investigating data for the motor; when the measured efficiency data does not exist, where the nominal name plate efficiency is considered in the use of the model, and investigating the motor using the investigating data.