Pot Core Inductor with Adjustable Air Gap for Parametric Audio
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Solution Overview
Problem
Conventional parametric audio systems face challenges in achieving high volume outputs with low distortion due to physical limitations of emitters, leading to distortion and emitter failure, despite attempts at techniques like square rooting and amplitude modulation.
Innovation Solution
A pot core inductive device with a non-conductive or ferromagnetic housing, comprising two sections with a coil support member and elastomeric material, allows for adjustable air gaps to optimize inductive value and reduce distortion by achieving better electrical resonance between the inductive device and emitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the emitter is driven at intense levels to achieve high volume output, then the output volume is improved, but distortion increases and emitter failure rate increases
Solution Approach 1:
The patent applies dynamics by making the inductive device adjustable through air gap modification. The housing sections can be positioned at different distances from each other, allowing the inductance value to be dynamically optimized for different operating conditions. This enables the system to achieve high output volumes without excessive distortion by tuning the inductive coupling to match the emitter's operating point.
Solution Approach 2:
The patent changes the physical parameter of air gap distance to optimize inductive coupling. By adjusting the distance between housing sections, the inductance value is modified to achieve optimal electrical resonance with the emitter. This parameter adjustment allows the system to operate at high power levels while maintaining low distortion, resolving the contradiction between output volume and signal quality.
2Reliability
If the air gap is reduced to increase inductive coupling, then electrical resonance is improved, but magnetic field interference increases
Solution Approach 1:
The adjustable air gap design allows dynamic optimization of the balance between inductive coupling and magnetic field containment. The housing can be positioned to achieve the precise air gap distance needed for optimal electrical resonance while preventing excessive magnetic field leakage. This dynamic adjustability resolves the contradiction by allowing system tuning to the optimal operating point.
Solution Approach 2:
The patent employs ferromagnetic or non-conductive housing materials that provide both structural support and magnetic field management. These composite material properties enable the housing to guide and contain magnetic fields while allowing controlled air gap adjustment, thus achieving good electrical resonance without excessive magnetic field interference in surrounding areas.
3Device complexity
If fixed inductive value is used to simplify design, then device complexity is reduced, but adaptability to different operating conditions is limited
Solution Approach 1:
The patent implements a simple yet effective dynamic adjustment mechanism by allowing the housing sections to be positioned at different distances from each other. This mechanical adjustability provides multiple inductance values without complex electronic circuitry, achieving adaptability to different operating conditions while maintaining relatively simple device structure.
Solution Approach 2:
The inductive device is segmented into two separate housing sections that can be independently positioned. This segmentation allows flexible adjustment of the air gap distance to optimize inductance for different operating conditions, providing adaptability while keeping each individual housing section structurally simple.
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 enables higher quality, low-distortion, high-output ultrasonic audio production by reducing magnetic field interference and allowing for efficient electrical resonance, thus improving the performance of ultrasonic audio systems.
Implementation Method 1
allows for adjustable air gaps to optimize inductive value and reduce distortion by achieving better electrical resonance between the inductive device and emitter
Implementation Method 2
A pot core inductive device with a non-conductive or ferromagnetic housing... reducing magnetic field interference
Data Source
AI summary
An apparatus and method for optimizing a parametric emitter system having a pot core inductive device coupled between an amplifier and emitter. The pot core inductive device allows for adjustments of the air gap formed between the two halves of the pot core structure to adjust its inductive value. This post-manufacture adjustability allows for corrections of differences caused by operations of other components in the audio system and to account for slight differences in the electrical circuit of different amplifier/emitter combinations. As efficiency of the system is dependent on the functional relationship between the amplifier, inductive device, and emitter, this allows for fine tuning of the signal to obtain high quality.