Dual-magnetic-gap dual-coil external-magnetic transducer and preparation method thereof

A dual-coil, dual-magnetic gap technology, applied in sensors, electrical components, etc., can solve the problems of undisclosed transducer manufacturing methods, deficiencies, etc.

Inactive Publication Date: 2012-03-21
张凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] ZL001221973, US6795564 and CN1026901A etc. that the present inventor has proposed relate to the patents or patent applications of double-gap double-coil external magnetic

Method used

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  • Dual-magnetic-gap dual-coil external-magnetic transducer and preparation method thereof
  • Dual-magnetic-gap dual-coil external-magnetic transducer and preparation method thereof
  • Dual-magnetic-gap dual-coil external-magnetic transducer and preparation method thereof

Examples

Experimental program
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Embodiment Construction

[0070] figure 1 A longitudinal sectional view of Embodiment 1 of the present invention is shown.

[0071] The upper pole plate 203A and the lower pole plate 203B made of good magnetically permeable materials are two circular flat plates with equal and symmetrical projection planes. There is a shaft hole in the center, and the central axis of the shaft hole constitutes the magnetic circuit and coil of the speaker. Vertical axis of symmetry for electrical and vibratory systems. An axially magnetized annular NdFeB magnet 202 is arranged between the upper pole plate 203A and the lower pole plate 203B and is matched with each other. Adhesive 001 glues the upper pole plate 203A, the permanent magnet 202 and the lower pole plate 203B. form a magnetic core.

[0072] The frame 201 made of non-magnetically conductive rigid materials such as aluminum alloy or engineering plastics is provided with an open cylinder 1871 at its waist, and its inner diameter matches the diameter of the up...

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PUM

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Abstract

The invention relates to a dual-magnetic-gap dual-coil external-magnetic transducer and a preparation method thereof. The dual-magnetic-gap dual-coil external-magnetic transducer is characterized in that: a permanent magnet is clamped between two polar plates, two coaxial equant annular magnetic gaps and two groups of symmetric magnetic circuits and symmetric coil circuits are formed between an outer circumferential surface of a cylindrical magnetic body which is installed to be coaxial with the polar plates and the permanent magnet and a vertical circumferential surface of a central shaft hole on each polar plate, a winding direction and a connecting way of the coils and corresponding technologies are stipulated, two groups of short-circuit rings are additionally arranged on the cylindrical magnetic body, a counter-electromotive force and an inductance sensed by the transducer during the work process are mutually counteracted, and the dual-magnetic-gap dual-coil external-magnetic transducer has an ohmic load property or a similar ohmic load property and has ultra high sensitivity, high analysis capacity and high fidelity.

Description

technical field [0001] The invention relates to a transducer, in particular to an external magnetic transducer with double magnetic gaps and double coils, and belongs to the fields of electric electroacoustic transducers and electromechanical transducers. Background technique [0002] ZL001221973, US6795564 and CN1026901A etc. that the present inventor has proposed relate to the patents or patent applications of double-gap double-coil external magnetic transducers, and do not disclose the manufacturing method of said transducers, and its resistive load characteristics are between 15- The 20kHz band also has obvious shortcomings. Contents of the invention [0003] The first object of the present invention is to overcome the deficiencies of the prior art, and provide a ring-shaped magnetic body with two symmetrical short-circuit rings, so that the high-order harmonics of the transducer are suppressed, and in the frequency band of 15-20kHz Resistive load characteristics are ...

Claims

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Application Information

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IPC IPC(8): H04R9/06H04R9/02
Inventor 张凡
Owner 张凡
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