Pot Magnet Assembly With Decoupled Pole Plate for Vibration Stability
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Solution Overview
Problem
Existing pot magnets for plunger coil arrangements in balance systems, especially those exposed to mechanical shocks or vibrations, suffer from reduced measuring accuracy due to changes in the position of the permanent magnet and pole plate relative to the housing.
Innovation Solution
The permanent magnet is bonded directly to the housing base, decoupling it from the pole plate, which is rigidly fastened to the housing. This configuration reduces the sensitivity to mechanical shocks and vibrations, maintaining a constant gap width between the magnet and the housing, and between the magnet and the pole plate, thus minimizing changes in the magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the permanent magnet is connected to the pole plate with a rigid mechanical connection, then the position of the pole plate is kept constant, but the unit experiences changes in position relative to the housing during mechanical shocks or vibrations
Solution Approach 1:
The magnetic assembly is segmented into two independently supported components: the permanent magnet is bonded to the housing base while the pole plate is rigidly fastened to the housing. This segmentation allows each component to be positioned and supported independently, reducing the oscillating mass and improving stability during mechanical shocks and vibrations.
2Measurement precision
If additional support elements are provided to support the pole plate, then the position stability is improved, but the space requirement increases or the strength of the permanent magnet is reduced
Solution Approach 1:
The housing base serves multiple functions: it provides structural support for the entire assembly and simultaneously bonds the permanent magnet to establish a fixed reference position. This eliminates the need for additional support elements that would otherwise be required to stabilize the pole plate position.
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 design enhances the mechanical stability and measuring accuracy of the pot magnet, particularly in environments with mechanical shocks or vibrations, while maintaining a simple design and minimizing the risk of damage from impacts.
Implementation Method 1
a balance operating according to the principle of electromagnetic force compensation
Implementation Method 2
the permanent magnet is bonded with its underside to the inner bottom surface of the housing
Data Source
AI summary
A pot magnet for a plunger coil arrangement includes a housing defining an interior with a housing bottom surface and a circumferential surface extending perpendicularly to the housing bottom A permanent magnet unit is arranged in the interior of the housing and includes a permanent magnet and a pole plate. An annular gap for accommodating a plunger coil of a plunger coil arrangement is formed between a circumferential surface of the pole plate and the circumferential surface of the housing interior. The underside of the permanent magnet is bonded to the housing bottom surface. The pole plate is connected to the housing in a manner decoupled from the permanent magnet by a rigid fastening device and is positioned in such a manner that a lower side of the pole plate faces an upper side of the permanent magnet with a gap formed there between.