Magnetron Magnetic Field Adjustment via Slidable Permeable Mass
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Solution Overview
Problem
Existing magnetron technologies face challenges in making fine adjustments to the magnetic field strength, particularly when using high-energy magnetic materials like samarium-cobalt or neodymium-iron-boron, which are difficult to magnetize and require precise trimming to operate at desired current and voltage levels.
Innovation Solution
A magnetron design incorporating a slidable mass of magnetically permeable material that can be secured to adjust the magnetic field strength through the interaction region, using a slider or rotary member with serrations and a locking mechanism to divert magnetic flux, allowing for precise adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If high-energy magnetic materials (samarium-cobalt or neodymium-iron-boron) are used to create stronger magnetic fields, then the magnetron size and weight are reduced, but the difficulty of magnetizing the material increases significantly
Solution Approach 1:
The magnetic field adjustment mechanism is pre-configured into the magnetron structure during manufacturing. The slider and magnetically permeable material are positioned in advance to create adjustable flux paths, allowing field strength modification without requiring complex post-manufacturing magnetizing procedures.
Solution Approach 2:
The invention introduces a dynamic adjustment mechanism that allows the magnetic field strength to be modified after manufacturing. The slider can be moved along the waveguide to change the position of magnetically permeable material, dynamically adjusting the magnetic flux distribution and field strength to compensate for the difficulty of initial magnetizing.
2Power
If the magnetic field strength is increased using high-energy materials, then the magnetron operates more efficiently, but precise trimming of the field strength becomes necessary to achieve desired operating parameters
Solution Approach 1:
The adjustable slider mechanism enables continuous variation of the magnetic field strength by changing the position of magnetically permeable material. This dynamic adjustment capability allows precise trimming of the field strength to achieve exact operating parameters without requiring high-precision manufacturing tolerances.
Solution Approach 2:
The invention changes the magnetic circuit parameters by introducing a variable geometric configuration through the slider. By moving the slider to different positions, the magnetic flux path length and cross-sectional area are modified, thereby adjusting the magnetic field strength to achieve desired operating conditions.
3Power
If corner shunts or additional magnetic return path sheets are used to reduce magnetic field strength, then the field can be trimmed, but the device complexity and construction difficulty increase
Solution Approach 1:
The slider component serves multiple functions: it positions magnetically permeable material to adjust magnetic flux, acts as a mechanical adjustment mechanism, and integrates with the existing waveguide structure. This multi-functionality reduces the need for separate adjustment components and simplifies the overall device construction.
Solution Approach 2:
The magnetically permeable material acts as an intermediary element that modifies the magnetic flux distribution without requiring direct modification of the permanent magnets or complex reconfiguration of the magnetic circuit. This intermediary approach simplifies the adjustment mechanism compared to using corner shunts or additional return path sheets.
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
Enables fine and controlled adjustments to the magnetic field strength, accommodating variations in field requirements and facilitating the use of high-energy magnetic materials by allowing for precise trimming of the magnetic field within the magnetron.
Implementation Method 1
a pair of permanent magnets on each side of the anode defining an interaction region and creating a magnetic circuit defining a magnetic field through the interaction region
Implementation Method 2
a mass of magnetically permeable material positioned in a vicinity of the magnetic circuit, the mass being arranged to be slidable over the anode casing
Data Source
AI summary
A magnetron includes an anode with an anode casing at least partly surrounding the anode. A pair of permanent magnets on each side of the anode define an interaction region and create a magnetic circuit defining a magnetic field through the interaction region. A mass of magnetically permeable material is positioned in a vicinity of the magnetic circuit. The mass is arranged to be slidable over the anode casing. A locking device secures the position of the mass to set the strength of the magnetic field through the interaction region.