Multiphase Motor Design Using Lumped Parameter Model
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Solution Overview
Problem
The design of electric motors using finite element analysis (FEA) requires substantial simulation time, and existing monitoring systems for motor and generator systems in critical service areas fail to prevent catastrophic failures due to inadequate monitoring and prediction of deterioration and remaining operating life.
Innovation Solution
A method for designing and customizing multiphase electric motors using a lumped parameter model (LPM) that reduces simulation time, incorporates environmental factors like humidity and temperature, and utilizes a 5D customization process to optimize motor design, including the use of an objective function with weighting coefficients to balance performance, cost, and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If finite element analysis (FEA) is used for motor design, then design accuracy and reliability are improved, but simulation time increases substantially
Solution Approach 1:
The patent creates a simplified lumped parameter model (LPM) that copies the essential electromagnetic characteristics of the motor without replicating the full geometric detail. This LPM serves as a computational surrogate that maintains design accuracy for performance prediction while reducing simulation time by avoiding complex 3D FEA geometries
Solution Approach 2:
The patent transforms the design parameters from detailed geometric dimensions used in FEA to lumped electromagnetic parameters in the LPM. This parameter transformation allows the same design optimization goals to be achieved using simplified electrical and magnetic circuit parameters rather than complex spatial geometries
2Manufacturing precision
If thousands of design evaluations are performed to achieve optimized motor design, then design quality is improved, but total simulation time exceeds one month
Solution Approach 1:
The LPM acts as a fast computational copy that can be evaluated thousands of times during optimization without the computational burden of full FEA. Each design candidate is quickly assessed using the LPM, enabling comprehensive design exploration and optimization that would be prohibitively time-consuming with traditional FEA
Solution Approach 2:
The patent performs preliminary design evaluations using the fast LPM to identify promising design candidates before applying more detailed analysis. This preliminary screening action filters out poor designs early, allowing subsequent detailed FEA to be applied only to a small subset of optimized candidates
3Ease of operation
If conventional monitoring systems are used for motor and generator systems, then basic operation monitoring is provided, but catastrophic failures cannot be prevented due to inadequate deterioration prediction
Solution Approach 1:
The patent implements a monitoring system that continuously measures motor parameters and compares them against predicted values from the LPM. This feedback mechanism detects deviations indicating deterioration, allowing predictive maintenance actions to be taken before catastrophic failure occurs
Solution Approach 2:
The system prepares for potential failures by continuously predicting remaining operating life and detecting early signs of deterioration. This beforehand cushioning approach allows maintenance to be scheduled in advance, preventing catastrophic failures before they occur rather than reacting after failure
Data Source
AI summary
A method for designing and customizing a multiphase motor provides reduced modeling and customization time by utilizing a lumped parameter model (LPM) of the multiphase motor. In addition, during the design process, environmental factors, monitoring results of multiphase motors used in the field, market requirements, and the particular application for which the multiphase motor is to be used are all taken into account by the design method. Thus, by considering such factors together with the LPM of the multiphase motor allows the method of the present invention to optimize the overall design of the multiphase motor so that is achieves high reliability, high efficiency, and low cost.