Multi-Pole Magnet Coil Assembly Flux Concentration
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Solution Overview
Problem
Current systems for concentrating and controlling magnetic flux in multi-pole magnetic structures face limitations in efficiently directing and concentrating magnetic fields due to the mismatch between magnet-to-pole piece and pole piece-to-target interface areas, which affects the saturation flux density and overall magnetic flux concentration.
Innovation Solution
A magnet and coil assembly with a multi-pole magnetic structure, pole pieces, and a movable magnetic circuit that routes magnetic flux from the multi-pole magnetic structure to a target, utilizing a shunt plate to control and concentrate magnetic flux by adjusting the ratios of interface areas and saturation flux densities, allowing for precise control of magnetic field emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the magnet-to-pole piece interface area is made larger, then the magnetic flux capacity is improved, but the pole piece-to-target interface area must be smaller to achieve flux concentration, which limits the overall flux transmission
Solution Approach 1:
The magnetic circuit is divided into multiple pole pieces, each with its own interface areas. The first pole piece has a first magnet-to-pole piece interface with area A1 and a first pole piece-to-target interface with area A2, where A1/A2 > 1. This segmentation allows different interface areas at different locations, enabling flux concentration while maintaining overall flux capacity through the multi-pole structure.
Solution Approach 2:
Different regions of the magnetic circuit are given different properties. The magnet-to-pole piece interfaces are designed with larger areas to capture maximum flux, while the pole piece-to-target interfaces are designed with smaller areas to concentrate the flux. This local differentiation of interface areas optimizes both flux capacity and concentration simultaneously.
2Force
If pole pieces are used to concentrate magnetic flux, then the magnetic field strength at the target is improved, but the saturation flux density limits the maximum concentration ratio
Solution Approach 1:
The magnetic circuit design allows for adjustable flux concentration by varying the interface area ratios. The concentration ratio A1/A2 can be optimized based on the saturation flux density of the pole piece material and the required magnetic field strength at the target, providing a dynamic design approach that adapts to different operating conditions.
Solution Approach 2:
The interface areas A1 and A2 are designed with specific area ratios to optimize flux concentration while accounting for saturation effects. By carefully selecting the area ratio A1/A2 based on the saturation flux density of the pole piece material, the system achieves maximum magnetic field strength without being limited by saturation.
3Quantity of substance
If a multi-pole magnetic structure is used, then the overall magnetic flux capacity is improved, but the complexity of controlling and directing flux from multiple poles increases
Solution Approach 1:
The multi-pole magnetic structure is segmented into multiple independent pole pieces, each with its own magnet-to-pole piece and pole piece-to-target interfaces. This segmentation simplifies the control of flux from each pole while maintaining high overall flux capacity, as each pole piece can be independently optimized and controlled.
Solution Approach 2:
The pole pieces serve multiple functions: they concentrate flux from their respective magnets, direct the flux to specific targets, and can be independently controlled. This multi-functionality reduces the overall complexity of the flux control system compared to a single large magnetic structure.
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 configuration enables significant concentration of magnetic flux at the pole piece-to-target interfaces, achieving a flux concentration ratio that maximizes magnetic field strength and efficiency, with the ability to move objects or orient devices based on magnetic field transitions.
Implementation Method 1
a coil configured about the polarity transition boundary on the first side of the multi-pole magnet. When the current travels in a first current direction through the coil the object moves in a first movement direction and when the current travels in a second current direction through the coil that is opposite to the first current direction the object moves in a second movement direction that is opposite to the first movement direction
Implementation Method 2
a system for concentrating and controlling magnetic flux of a multi-pole magnetic structure using pole pieces having a magnet-to-pole piece interface with a first area and a pole piece-to-target interface with a second area substantially smaller than the first area
Data Source
AI summary
A magnet and coil assembly comprises a multi-pole magnetic structure, a coil, an object associated with the coil, and a circuitry for applying a current through the coil. The multi-pole magnetic structure comprises a plurality of magnetic source regions that each extend from a first side of said multi-pole magnetic structure to a second side of said multi-pole magnetic structure and include a first magnetic source region having a first polarity and a second magnetic source region having a second polarity. The multi-pole magnetic structure has a polarity transition region having a polarity transition boundary corresponding to an outer perimeter of the first magnetic source region where a magnetic field measured on the first side or the second side of said multi-pole magnetic field structure transitions from the first polarity to said second polarity. The coil is configured proximate to the first side of said multi-pole magnetic structure and about the polarity transition boundary. When the current travels in a first current direction through the coil the object moves in a first movement direction and when the current travels in a second current direction through the coil the object moves in a second movement direction.