U-shaped short-circuit ring for loudspeaker distortion reduction
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Solution Overview
Problem
Traditional loudspeaker magnetic circuit systems suffer from significant harmonic and non-linear distortion, particularly at high frequencies, due to the high self-inductance of the voice coil, which affects the magnetic stability and acoustic performance.
Innovation Solution
A U-shaped short-circuit ring is integrated into the loudspeaker magnetic circuit system, optimizing the connection between the short-circuit ring, spring washer, magnetic steel, and T iron to reduce distortion and improve acoustic performance by decreasing the voice coil's inductance and increasing frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional short-circuit ring is disposed on the inside of the voice coil or on the inside of the magnetic steel, then the structure is simple, but the harmonic distortion and non-linear distortion of the loudspeaker are not effectively reduced
Solution Approach 1:
The short-circuit ring is divided into two separate rings: a first short-circuit ring disposed on the inside of the voice coil and a second short-circuit ring disposed on the inside of the magnetic steel. This segmentation allows each ring to independently optimize different aspects of the magnetic field, thereby effectively reducing both harmonic distortion and non-linear distortion while maintaining structural simplicity
Solution Approach 2:
The two short-circuit rings act as intermediaries that modify the magnetic field distribution between the voice coil and magnetic steel. By introducing these intermediate elements, the patent achieves better distortion reduction without significantly increasing overall structural complexity
2Use of energy by moving object
If the short-circuit ring is disposed below the spring washer around the magnet, then the inductance of the voice coil is reduced, but the magnetic stability during operation is compromised due to the high calorific value of the T iron cartridge
Solution Approach 1:
By segmenting the short-circuit function into two separate rings positioned at different locations, the patent achieves inductance reduction through the first ring while maintaining magnetic stability through the second ring's position on the magnetic steel, away from the high-calorific T iron cartridge
Solution Approach 2:
The patent applies different local qualities to different parts of the magnetic circuit: the first short-circuit ring focuses on inductance reduction near the voice coil, while the second short-circuit ring focuses on magnetic stability near the magnetic steel, allowing each component to optimize its local function
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 U-shaped short-circuit ring effectively reduces harmonic and non-linear distortion, enhancing the overall acoustic performance and sound quality of the loudspeaker by stabilizing the magnetic field and slowing down the increase in electrical resistance with frequency.
Implementation Method 1
when the external drive current drives the voice coil to vibrate, an induced current in an opposite direction may also be incurred, especially when in high frequency, the self-inductance of the voice coil is so large that the induced current becomes large
Implementation Method 2
The short-circuit ring can counteract the effects on the magnetic field in the loudspeaker from the induced current of the voice coil
Data Source
AI summary
A loudspeaker magnetic circuit system includes an iron a magnetic steel, a spring washer, a voice coil and a U-shaped short-circuit ring. The U-shaped short-circuit ring includes a first ring body and a second ring body, and the voice coil is positioned and movable up and down in a U-shaped groove formed by the first ring body and the second ring body. Through making the short-circuit ring into a U-shaped structure and optimizing the connection relationship between the short-circuit ring and other components such as the spring washer, magnetic steel and iron, the present invention can effectively reduce the harmonic distortion and non-linear distortion of the loudspeaker and improve the overall acoustic performance of the speaker such that the sound quality of loudspeaker is improved.