Electromagnet Disk Air Gap Magnetic Shunt
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnet devices face challenges in achieving continuous and proportional displacement due to the sharp increase in magnetic force as the air gap decreases, making it difficult to adjust without geometrically enlarging components, and the complexity of implementing an immersion stage with precise guidance to avoid physical contact, which increases manufacturing costs.
Innovation Solution
A disk is arranged in the air gap between the magnet armature and armature counterpart, allowing for physical contact in at least one relative position to create a magnetic shunt, reducing the magnetic force and avoiding the need for precise tolerances, while a spring element counteracts the magnetic force with minimal resistance, maintaining positionability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the air gap is decreased to increase magnetic force, then the magnetic force increases sharply, but continuous and proportional displacement becomes difficult to achieve
Solution Approach 1:
A disk is introduced as an intermediary element in the air gap between the magnet armature and armature counterpart. This disk creates a magnetic shunt when in contact, providing a controlled magnetic path that moderates the magnetic force curve and enables smoother, more continuous displacement control without the extreme exponential force increase associated with small air gaps.
2Ease of operation
If the air gap is increased to flatten the magnetic force curve, then continuous displacement becomes easier, but the magnetic force level decreases and requires larger components
Solution Approach 1:
The invention changes the magnetic circuit parameters by introducing a disk with specific magnetic properties into the air gap. This disk modifies the magnetic reluctance and flux distribution, creating a favorable magnetic force curve that maintains adequate force levels while enabling continuous displacement control, avoiding the need to increase component dimensions.
3Force
If an immersion stage is implemented to avoid physical contact, then magnetic force control is improved, but manufacturing complexity and cost increase due to precise guidance requirements
Solution Approach 1:
The disk is designed as a simple, inexpensive component that can be easily manufactured with standard tolerances. Rather than implementing complex immersion stage guidance structures, the invention uses this simple disk that naturally provides the necessary magnetic shunt function through contact, significantly reducing manufacturing complexity and cost.
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 achieves a favorable magnetic force curve with low production costs, avoiding discontinuities in magnetic force and reducing manufacturing complexity, enabling efficient and cost-effective operation of electromagnet devices.
Implementation Method 1
A disk that can be brought into touching contact at least in regions with the magnet armature end face and the armature counterpart end face is arranged in the air gap
Implementation Method 2
a spring element counteracts the magnetic force with minimal resistance, maintaining positionability
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an electromagnetic device (1) comprising a magnet armature (2) and a mating armature piece (10) that lies on the end face of the magnet armature (2). The magnet armature (2) and the mating armature piece (10) can be displaced relative to each other, and an air gap (16) is present between a magnet armature end face (14) and a mating armature piece end face (15). A disk (19) that can be brought into physical contact with the magnet armature end face (14) and the mating armature piece end face (15) at least in some regions lies in the air gap (16). The invention further relates to a driver assistance device.