Active Magnetic Bearing Calibration Memory for Fast Setup
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Solution Overview
Problem
Active magnetic bearings for open-end spinning machines require individual calibration and parameter setting at each operating unit due to production and installation tolerances, leading to lengthy and risky initialization processes, especially in textile machines with multiple identical units.
Innovation Solution
A method where detected parameters and correction values are recorded in a memory within the active magnetic bearing assembly, allowing for permanent storage and use during the entire service life, eliminating the need for individual parameter setting at each operating unit by using these stored values to adjust the position detection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual calibration and parameter setting is performed at each operating unit, then the active magnetic bearing fulfills its function properly, but the initialization process becomes lengthy and complex
Solution Approach 1:
The patent applies preliminary action by performing the calibration and parameter setting process during the manufacturing phase rather than at installation. The control device determines optimal parameters in advance, and these parameters are stored in a storage device associated with the active magnetic bearing assembly. This eliminates the need for time-consuming individual calibration at each operating unit while ensuring the bearing functions correctly.
Solution Approach 2:
The patent uses copying by storing the calibrated parameters in a storage device that travels with the active magnetic bearing assembly. When the bearing is installed at any operating unit, the pre-stored parameters are automatically used, eliminating the need to recreate the calibration process. This copying of calibrated parameters across multiple installations resolves the contradiction between reliability and initialization time.
2Manufacturing precision
If individual calibration is performed during installation, then parameter accuracy is improved, but the complexity of the installation process increases
Solution Approach 1:
The calibration process is moved to the manufacturing phase where it can be performed under controlled conditions. The control device determines the optimal parameters during manufacturing, and these parameters are stored in the assembly's storage device. This preliminary action eliminates the need for complex calibration procedures during installation, reducing installation complexity while maintaining parameter accuracy.
Solution Approach 2:
The active magnetic bearing assembly becomes self-sufficient by having its own storage device containing pre-calibrated parameters. The assembly automatically uses these stored parameters during operation without requiring external calibration equipment or procedures during installation. This self-service capability reduces installation complexity while ensuring parameter accuracy.
3Reliability
If parameters are set individually for each bearing, then operational reliability is ensured, but productivity during servicing decreases
Solution Approach 1:
The patent enables rapid replacement during servicing by copying the pre-stored parameters from the new bearing assembly to the operating unit's control device. Since the parameters are already determined during manufacturing, the replacement process simply involves transferring these pre-existing parameters rather than performing new calibration. This copying process maintains operational reliability while dramatically increasing servicing productivity.
Solution Approach 2:
The parameters are determined in advance during manufacturing, preparing the bearing assembly for rapid installation. When servicing is needed, the pre-prepared parameters are already available in the storage device, allowing for quick parameter transfer and immediate operational reliability without time-consuming calibration during servicing.
4Adaptability or versatility
If calibration is performed at the operating unit, then adaptation to specific conditions is achieved, but the time required for setup increases
Solution Approach 1:
The calibration process is performed in advance during manufacturing, adapting the parameters to the specific bearing assembly's characteristics before installation. This preliminary adaptation ensures the bearing is optimized for its specific conditions without requiring time-consuming calibration at the operating unit. The pre-adapted parameters are stored and automatically used during operation.
Solution Approach 2:
The pre-adapted parameters are copied from the manufacturing stage to the operating unit. This copying preserves the adaptation to specific bearing characteristics while eliminating the time required to perform calibration at the operating unit. The stored parameters maintain adaptability without the time penalty of on-site calibration.
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 solution enables active magnetic bearings to operate properly without special calibration, ensuring consistent performance across identical units, reducing delays and simplifying the setup process, particularly beneficial for textile machines with numerous workstations.
Implementation Method 1
in the basic body means of creating a magnetic field, in which the spinning rotor of the open-end spinning machine is arranged
Implementation Method 2
there are special devices which by means of controlled magnetic forces maintain the position of the rotating working means in the allotted space
Implementation Method 3
sensors of the position of the spinning rotor of the open-end spinning machine, whereby, with each position sensor, a detector of its output signal and evaluation circuits are aligned
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a method for correcting variations of parameters of components of active magnetic bearing and/or assembly of active magnetic bearing as a whole. At the latest before starting to operate the active magnetic bearing are detected mechanical and/or electrical and/or installation variations and/or other variations of parameters of at least one component of the active magnetic bearing and/or of the whole active magnetic bearing assembly, whereupon the detected variations and/or correction values based on the variations are recorded in memory (M), which is an integral part of the active magnetic bearing assembly, and subsequently these variations and/or correction values are used from the memory (M) for adjustment of system for detecting position of the rotating working means in the active magnetic bearing during operation of the active magnetic bearing.