Micromirror Electromagnetic Drive Layout for Simpler Magnet Assembly
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Solution Overview
Problem
Existing micromechanical vibration systems face challenges in simplifying the assembly of their electromagnetic drive units, particularly with the arrangement of multiple magnets, which can complicate manufacturing and affect driving force efficiency.
Innovation Solution
A micromechanical vibration system with an electromagnetic drive unit featuring a coil body laterally arranged relative to a micromirror, spaced apart magnets on the opposite side of the reflective face, and a single magnetic flux plate between them to guide magnetic field lines, utilizing soft-magnetic plates and air gaps for simplified assembly and enhanced magnetic field focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple magnets are arranged in the electromagnetic drive unit, then the driving force is improved, but the assembly complexity and manufacturing difficulty increase
Solution Approach 1:
Multiple magnetic flux plates are merged into a single integrated component that guides magnetic field lines from multiple magnets to the coil body. This consolidation reduces the number of separate parts and simplifies assembly while maintaining the driving force generated by multiple magnets arranged on opposite sides of the micromirror
Solution Approach 2:
The magnetic flux plate serves multiple functions simultaneously: it guides magnetic field lines from different magnets, provides structural support for the magnet arrangement, and helps position the magnets relative to the coil body. This multi-functionality reduces the need for additional specialized components
2Power
If multiple magnets are arranged in the electromagnetic drive unit, then the driving force is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The magnetic flux plate acts as an intermediary component between the magnets and the coil body, providing a standardized interface that simplifies magnet positioning. The plate's geometry and mounting features serve as reference elements that reduce the precision requirements for direct magnet-to-coil alignment
Solution Approach 2:
The electromagnetic drive unit is segmented into modular components (magnets, magnetic flux plate, coil body) that can be manufactured and assembled separately. This segmentation allows for standardized manufacturing of each component with relaxed tolerances, while the overall assembly achieves the required precision through the designed interfaces
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 results in a manufacturable system with high driving force and reduced residual stresses, enabling efficient one- or two-dimensional micromirror rotation with improved manufacturing precision and cost-effectiveness.
Implementation Method 1
an electromagnetic drive unit (300, 300a, 300b) is provided, which comprises a coil body (310, 310a, 310b) and at least two magnets (50a, 50b)
Implementation Method 2
A single first magnetic flux plate (60a) for guiding the magnetic field lines toward the coil body is arranged between the magnets
Data Source
AI summary
A micromechanical vibration system. The system includes a micromechanical vibrating body with at least one micromirror. The micromirror extends in a first main extension plane and has a face reflective to incident light. The system further includes an electromagnetic drive unit comprising a coil body and at least two magnets. The coil body is arranged in a second main extension plane parallel to the first main extension plane. The coil body is arranged laterally and/or on a side opposite the reflective face of the micromirror and/or on a side facing the reflective face of the micromirror. The at least two magnets extend in a third main extension plane of the coil body parallel to the first and second main extension plane and are arranged on the side opposite the reflective face of the micromirror. A single first magnetic flux plate is arranged in an intermediate space between the magnets.