Ferrite Housing Inserts for Magnetic and Thermal Management
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Solution Overview
Problem
Ferrite device housings require complex and costly secondary operations due to thermal issues and precise threading challenges, adding complexity and cost to the manufacturing process, and often necessitate additional components like steel discs for magnetic return paths.
Innovation Solution
A ferrite housing with slots for metal inserts and a die-castable body that allows for a compression fit cover, eliminating the need for secondary machining and additional steel discs, using a die-cast process for the housing and stamping for the cover to simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is made from ferrous material to satisfy magnetic permeability requirements, then magnetic performance is improved, but thermal conductivity deteriorates and secondary machining is required
Solution Approach 1:
The housing is divided into two functional segments: a ferrous material insert providing magnetic permeability and a non-ferrous material housing providing thermal conductivity. This segmentation allows each material to be optimized for its specific function without compromise.
Solution Approach 2:
The housing employs a composite structure combining ferrous and non-ferrous materials. The ferrous insert is embedded within the non-ferrous housing, creating a composite assembly that delivers both magnetic performance and thermal management capabilities.
2Ease of manufacture
If metal injection molded housing is used, then manufacturing is simplified, but thermal conductivity deteriorates and additional thermally conductive material must be added
Solution Approach 1:
The housing combines non-ferrous material (providing thermal conductivity) with ferrous material insert (providing magnetic performance). This composite approach eliminates the need for separate thermal management components while maintaining manufacturing simplicity.
3Ease of manufacture
If progressive die stamped housing is used, then manufacturing is simplified, but thermal conductivity deteriorates and secondary machining is required
Solution Approach 1:
The housing uses a non-ferrous material body (providing thermal conductivity) with embedded ferrous inserts (providing magnetic performance). This composite structure eliminates the need for secondary machining while maintaining both thermal and magnetic properties.
4Reliability
If covers are manufactured from ferrous material with threaded portions, then magnetic performance is improved, but manufacturing precision deteriorates and cost increases
Solution Approach 1:
The cover is segmented into a non-ferrous material body (providing threading and structural functions) and ferrous inserts or coatings (providing magnetic performance). This segmentation allows threading to be formed in the more easily machined non-ferrous material.
Solution Approach 2:
The cover employs composite construction combining non-ferrous material (for precise threading) with ferrous material elements (for magnetic performance), optimizing both manufacturing and functional requirements.
5Reliability
If additional steel disc is added to enhance magnetic return path, then magnetic performance is improved, but device complexity and cost increase
Solution Approach 1:
The magnetic return path function is merged into the housing structure itself through strategically placed ferrous inserts. This eliminates the need for separate steel discs while maintaining magnetic performance.
Solution Approach 2:
The ferrous inserts in the housing serve multiple functions: providing local magnetic permeability enhancement and creating the magnetic return path. This multi-functionality reduces the need for additional dedicated components.
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 reduces manufacturing complexity and cost by allowing for a thermally conductive housing and magnetically permeable inserts, while eliminating the need for secondary machining and additional steel discs, enhancing the magnetic return path without increasing production costs.
Implementation Method 1
ferrite circulators are typically configured as multi-port (e.g., three-port) passive RF or microwave devices having within a housing magnets and ferrite material that may be used to control the direction of signal flow
Implementation Method 2
The housing for these ferrite devices can be metal injection molded, progressive die stamped or machined. The metal injection molded housing requires secondary machining and due to the thermal properties of the ferrous material (e.g., steel) used to form the housing, also requires adding or attaching a more thermally conductive material.
Implementation Method 3
a plurality of slots within the body configured to receive therethrough inserts having magnetic permeability
Data Source
AI summary
A circulator/isolator housing is provided that includes body and a plurality of slots within the body configured to receive therethrough inserts having magnetic permeability. The housing further includes a plurality of receiving portions within the body corresponding to the plurality of slots and configured to maintain a position of the inserts.