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Film short circuit ring of electromagnetism actuator

A technology of electromagnetic driver and short-circuit ring, applied in the direction of frequency/directional characteristic device, etc., can solve the problem of sound pressure level drop and so on

Active Publication Date: 2013-07-10
张百良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to input power in the high frequency band, and the sound pressure level drops

Method used

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  • Film short circuit ring of electromagnetism actuator
  • Film short circuit ring of electromagnetism actuator
  • Film short circuit ring of electromagnetism actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] On a commercially available tweeter of a certain brand, the magnetic circuit is a 28-core tweeter ferrite external magnetic circuit. Washer 2 is a ring of Φ70×Φ29×3mm, and magnet 3 is a ring of Φ72×Φ32×15mm. On the upper surface of the washer, a ring 1 made of copper foil with a thickness of 18 μm and Φ50×Φ38MM, which is the same size as the treble bracket, is added. After being reassembled, a tweeter with a thin-film short-circuit ring is formed. Frontier response improved by 8%. In the subjective listening experiment, compared with the unmodified treble, the treble with the short-circuit ring has a transparent and clear bottom, fast response, and rich details. When replaying violin, percussion, erhu and other instruments, it is more delicate and round, with a strong sense of life , the audio-visual image is more specific. However, there is no obvious difference in the sense of hearing between the high-pitched short-circuit rings made of copper foils with different t...

Embodiment 2

[0043] In a certain type of 28-core tweeter designed by the inventor, a single-sided printed circuit board is used to make an "integrated support with a film short-circuit ring", such as Figure 10 As shown, the bracket 9 is a circular ring of Φ72×Φ36×2.5MM; on its lower surface, that is, the surface in contact with the washer during installation, there is a copper foil ring belt of Φ64×Φ37MM, that is, a film short-circuit ring 1, and the copper foil is One ounce, the apparent thickness is 18μm. The rest of the assembly process is as usual. The new tweeter with thin-film short-circuit ring can be used in the original stereotyped production speaker system, that is, the speaker box, to directly replace the original tweeter. There is no need to adjust and change the frequency divider. There was also no measurable change in performance. However, the timbre has been significantly improved: the high-frequency performance is more delicate and mellow, the response is sharp, the stri...

Embodiment 3

[0045] In a certain type of 25-core tweeter designed by the inventor, its magnetic circuit is a 25-core tweeter ferrite external magnetic circuit, the washer 2 is Φ70×Φ26.5×3mm, and the magnetic steel 3 is Φ72×Φ32×15mm. Such as Figure 10 Schematically, its bracket 9 is Φ65×Φ31×2MM. On its lower surface, that is, the surface that is in contact with the washer 2 during installation, a prefabricated copper foil ring, that is, a thin film short circuit ring 1, is pasted, the size is Φ64×Φ32MM, and the copper foil is 18 μm thick, that is, one ounce of copper foil. The rest of the assembly was done as usual to make a tweeter with a thin film shorting ring.

[0046] Impedance, frequency response and distortion of the improved treble have measurable changes during the test, and the frontier response has been improved by 9% according to the aforementioned frontier response test method. The result of the subjective listening experiment is the same as that of Example 2.

[0047] In t...

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Abstract

The invention discloses a designing scheme of a high conductivity metallic film short circuit ring which does not change (or slightly changes) basic performance of a speaker while leading edge transient response of the speaker is obviously improved. In an irony member of a magnetic path near a voice coil, some parts of the irony member are in a highfield and high magnetic saturation state, the high magnetic saturation parts of the irony member are closely attached to the voice coil and are main sources of hysteresis damping received by the voice coil movement. The high conductivity metallic film short circuit ring needs arranging on the inner sides or the outer sides of the high magnetic saturation parts, the high magnetic saturation parts of the irony member are enabled to be placed in an inner and outer side strong affecting area of the short circuit ring, the adjustment on the interior magnetic field of the strongest magnetic field of the irony member by a voice coil current is reduced, therefore, a hysteresis damping effect is reduced, the leading edge transient response is improved, and the occurrence that voice coil inductance is blindly canceled or reduced greatly is avoided.

Description

technical field [0001] The present invention relates to a novel thin-film short-circuit ring and structure for an electromagnetic driver or loudspeaker Background technique [0002] The short-circuit ring, also known as the Faraday ring, is a metal ring made of highly conductive metals such as copper, aluminum, silver, etc. It is a mature technology that has been widely used for many years in electromagnetic drives or loudspeakers and linear motors. P118, P128 and P150 are introduced in detail in P118, P128 and P150 in the classic work "Speaker System" in the loudspeaker field edited by Takeo Yamamoto published in 1977, and the book "Loudspeaker handbook" also has a detailed introduction. [0003] The basic principle of the short-circuit ring in the traditional view is to play the role of a transformer secondary of the voice coil, and it is a short-circuited single-turn secondary coil. The purpose is to offset the inductance of the voice coil, thereby reducing the impedance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/20H04R1/28
Inventor 张百良
Owner 张百良
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