Acoustic Transducer Heat Dissipation Mounting
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Solution Overview
Problem
Momentum type acoustic transducers face challenges with heat dissipation and magnetic flux issues, leading to demagnetization of magnets and performance degradation, especially in compact designs used in closed spaces, and require effective mounting solutions to various substrates without increasing stack height.
Innovation Solution
A modular system with a thermally conductive modular key and ferrofluid-based magnetic motor design that minimizes stray magnetic flux and provides efficient heat dissipation through a combination of thermally conductive materials and radially oriented heat sink fins, allowing for coaxial alignment and secure mounting on diverse substrates with reduced stack height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high powered magnets are used to increase power output, then the power density and work capacity improve, but the magnets become sensitive to temperature and may demagnetize due to heat from voice coil windings
Solution Approach 1:
The patent extracts the harmful heat from the magnetic circuit by providing a separate thermal conduction path through the voice coil former to the can, removing heat before it can reach the magnets and cause demagnetization
Solution Approach 2:
The voice coil former acts as an intermediary thermal conduction path, providing a dedicated route for heat to travel from the voice coil windings to the can, preventing heat transfer to the magnets while still allowing the magnetic circuit to function
2Volume of moving object
If compact design is used to reduce stack height for installation in closed spaces, then the device fits in constrained spaces, but heat dissipation becomes more difficult and magnets are at risk of demagnetization
Solution Approach 1:
The patent adds radial heat dissipation fins to the can, extending the heat dissipation surface area in the radial dimension rather than increasing axial stack height, allowing effective cooling in compact configurations
Solution Approach 2:
The patent extracts heat from the compact magnetic circuit through the voice coil former and can structure, providing an efficient thermal escape route that works effectively even in reduced-size configurations
3Ease of operation
If conventional mounting means with protruding studs are used, then the transducer can be mounted to substrates, but the stack height increases which affects installation in closed spaces
Solution Approach 1:
The patent merges the mounting function into the existing can structure by providing threading directly in the can wall, eliminating the need for separate protruding mounting studs and integrating multiple functions into a single compact component
Solution Approach 2:
The can structure serves multiple functions simultaneously: it provides magnetic flux return path, structural support, mounting attachment points via threading, and heat dissipation surface, reducing the need for additional components that would increase stack height
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 solution enhances the reliability and performance of the transducer by maintaining high power density, reducing noise and distortion, and enabling installation in constrained spaces with improved heat management and magnetic flux control.
Implementation Method 1
draw heat out of the affected areas of the inertial type acoustic transducer. Using materials and designs to create a path for heat to be conducted and convected away from the voice coil including its windings, magnets and other heat sensitive components
Implementation Method 2
ferrofluid-based magnetic motor design that minimizes stray magnetic flux
Implementation Method 3
radially oriented heat sink fins, allowing for coaxial alignment and secure mounting on diverse substrates with reduced stack height
Data Source
AI summary
The inertial transducer comprises a foot, a modular key, at least one suspension means having at least three contact points, and heat dissipation means comprising multiple heat transfer points. The foot alternatively includes an opening or a cap. The cap may be frangible. Preferably, the foot includes a cylindrical wall that extends within the inertial transducer and the foot's lower surface is coplaner with the lower surface of a housing of the transducer, thereby reducing stack height. The cylindrical wall may or may not be threaded and may accept a shaft from a receiving apparatus used to associate the transducer with a substrate.