Orthogonal Magnet Circuit for Micro Transducer Driving Force
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Solution Overview
Problem
Micro transducers face challenges in achieving high performance due to size limitations, leading to low conversion efficiency and increased power consumption, with traditional designs suffering from magnetic leakage and inefficient energy conversion.
Innovation Solution
A magnetic circuit structure with a static magnetic field generating device comprising multiple magnet sets, including a first magnet set magnetized in the moving direction and orthogonal second and third magnet sets, enhancing magnetic induction intensity while maintaining the lightness and thinness of micro transducers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional moving-coil transducer design is used, then the transducer can achieve basic driving function, but magnetic leakage is high and energy conversion efficiency is low
Solution Approach 1:
The magnetic circuit is segmented into multiple independent magnet sets (first, second, and third magnet sets) with different magnetization directions. This segmentation allows each magnet set to contribute to different aspects of the magnetic field, reducing overall magnetic leakage while improving energy conversion efficiency. The first magnet set provides primary driving force, while the second and third magnet sets supplement the magnetic field in orthogonal directions to minimize flux leakage.
Solution Approach 2:
The patent employs a composite magnetic circuit structure combining multiple magnet sets with different magnetization orientations. This composite approach creates a multi-directional magnetic field system that efficiently utilizes magnetic flux, reducing leakage losses and improving the overall energy conversion efficiency of the transducer.
2Volume of moving object
If micro transducer size is reduced to meet portable device requirements, then the transducer becomes compact, but conversion efficiency decreases and power consumption increases
Solution Approach 1:
The patent introduces orthogonal magnetization directions (second and third magnet sets perpendicular to the first) to create a three-dimensional magnetic field distribution within the compact transducer structure. This dimensional approach maximizes the utilization of limited space, enabling efficient energy conversion without increasing the transducer's overall footprint.
Solution Approach 2:
The composite magnetic circuit structure combines multiple magnet sets with different orientations, creating a highly efficient compact design that maintains low power consumption despite the reduced size. The synergistic interaction between the magnet sets compensates for the size reduction effects.
3Force
If the number of magnet sets is increased to improve magnetic induction intensity, then magnetic induction intensity increases, but device complexity increases
Solution Approach 1:
Each magnet set is assigned a specific local function: the first magnet set provides the primary magnetic field in the moving direction, while the second and third magnet sets provide supplementary fields in orthogonal directions. This localized functional assignment optimizes magnetic induction intensity at each position within the magnetic circuit, achieving high overall magnetic induction with a manageable structure.
Solution Approach 2:
The multiple magnet sets serve multiple functions simultaneously: they generate the driving magnetic field, shape the magnetic flux distribution, and minimize leakage paths. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving high magnetic induction intensity.
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
The magnetic circuit structure significantly improves magnetic induction intensity, driving force, and energy conversion efficiency, reducing stiffness and enhancing low-frequency performance without increasing product size.
Implementation Method 1
a first magnet set that is magnetized in a moving direction of the transducer
Implementation Method 2
a second magnet set and a third magnet set that are located in a direction orthogonal to a static magnetic field generated by the first magnet set
Implementation Method 3
the second magnet set and third magnet set are provided to increase magnetic induction intensity of the static magnetic field
Implementation Method 4
a magnetic field force generated by an interaction between the static magnetic field and the alternating magnetic field is applied to the magnetic conductive material so as to drive the movable device to move
Data Source
AI summary
Disclosed is a magnetic circuit structure of a transducer comprising a static magnetic field generating device which comprises magnet sets, the magnet sets comprise a first magnet set magnetized in a moving direction of the transducer, a second magnet set and a third magnet set located in a direction orthogonal to a static magnetic field generated by the first magnet set, a magnetization direction of the second magnet set is orthogonal to that of the first magnet set, a magnetization direction of the third magnet set is orthogonal to that of the second and first magnet sets, the second and third magnet sets increase a magnetic induction intensity of the static magnetic field. The magnetic circuit structure of the transducer in the present disclosure can effectively solve the problem that a driving force of the transducer applying thereof is not sufficient, thus increasing the efficiency of electric-to-mechanical conversion.