Magnetization Analysis Method for Incomplete Magnetization Regions
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Solution Overview
Problem
Conventional magnetic field analysis methods fail to accurately account for the incomplete magnetization region in permanent magnets, leading to discrepancies between analysis results and actual measurements, which can result in equipment characteristics not matching design intentions.
Innovation Solution
A magnetic field analysis method that considers the incomplete magnetization region by using demagnetization curves measured in advance, calculating region parameters such as recoil ratio permeability and coercivity, and applying these parameters to analyze the magnetic state of permanent magnets with high precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetization analysis methods are used that assume complete or non-magnetized regions, then the analysis process is simple, but the analysis accuracy deteriorates due to divergence from actual measurements
Solution Approach 1:
The permanent magnet is divided into multiple regions based on magnetization degree: complete magnetization regions and incomplete magnetization regions. Each region is assigned different magnetic characteristics (demagnetization curves) to accurately represent its actual magnetic state, resolving the contradiction by segmenting the magnet rather than treating it as uniformly magnetized or non-magnetized
Solution Approach 2:
Demagnetization curves for different regions are measured and stored in advance before the actual magnetization analysis. This preliminary measurement of regional characteristics allows the analysis to accurately reflect actual magnetic states without requiring complex real-time measurements, thus improving accuracy while maintaining reasonable complexity
2Reliability
If the incomplete magnetization region is not considered in the analysis, then the analysis process is simplified, but the reliability of the analysis result deteriorates due to mismatch with actual equipment characteristics
Solution Approach 1:
Different regions of the permanent magnet are assigned different magnetic qualities based on their actual magnetization states. Complete magnetization regions use one set of demagnetization curves while incomplete magnetization regions use another set, allowing each region to be analyzed with appropriate characteristics that match its local magnetic state, thereby improving reliability without excessive complexity
3Measurement precision
If demagnetization curves for incomplete magnetization regions are measured and used, then the magnetic state analysis accuracy is improved, but the measurement and analysis process becomes more complex
Solution Approach 1:
Demagnetization curves for different regions are measured and stored in advance before the actual magnetization analysis. This preliminary measurement approach separates the complex measurement task from the analysis process, allowing accurate regional characteristics to be captured once and then reused, improving measurement accuracy while making the actual analysis easier to perform
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise magnetization analysis that aligns analysis results with actual measurements, ensuring designed equipment characteristics match manufactured equipment characteristics, thereby improving the accuracy and reliability of magnetic field analysis.
Implementation Method 1
a magnetizer (4) which applies a magnetic field to magnetize the magnetic material (30)
Implementation Method 2
a demagnetization curve which is obtained by actually measuring each incomplete magnetization region of the permanent magnet in advance and corresponds to an applied magnetizing magnetic field
Data Source
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AI summary
It is possible to perform accurate magnetization analysis by considering the magnetic state of an incomplete magnetic region. A magnetization analysis device performs magnetization analysis by using a magnetizer parameter associated with a magnetizer and a magnet parameter associated with a magnet material so as to calculate a magnetization magnetic field applied to respective portions of the magnet material (S 17), calculates a recoil ratio permeability and a coercivity as region of a permanent magnet as an analysis object for the respective portions according to the calculation result of the magnetized magnetic field and the demagnetization curve associated with the incomplete magnetization region actually measured in advance (S18), and performs a magnetic field analysis by using the calculation result of the region parameter so as to calculate a state parameter indicating the magnetized state of the permanent magnet as an analysis object (S19).