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A low-inductance electromagnetic driver for non-exciting magnetic circuit

An electromagnetic driver, excitation magnetic technology, applied in the direction of sensors, sensor parts, electrical components, etc., can solve problems such as limited effect, achieve low cost, reduce sound distortion, and expand the frequency range.

Inactive Publication Date: 2009-04-15
吴琪君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the function of the short-circuit ring is only to passively consume a part of the energy generated by the drive coil, and the short-circuit ring is not electrically connected to the drive coil, it is impossible to actively and equally counter-excite the magnetic circuit system to offset the drive coil Harmful excitation to the magnetic circuit system, the effect is very limited, which is fundamentally different from the present invention

Method used

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  • A low-inductance electromagnetic driver for non-exciting magnetic circuit
  • A low-inductance electromagnetic driver for non-exciting magnetic circuit
  • A low-inductance electromagnetic driver for non-exciting magnetic circuit

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Embodiment Construction

[0040] The present invention will be described in detail below through specific embodiments and accompanying drawings.

[0041] First embodiment of the present invention: as figure 1 As shown, it is composed of a magnetically conductive column 1, a drive coil 2, a first fixed coil 3, a magnetically conductive upper plate 4, a permanent magnet 5, and a magnetically conductive lower plate 6. The magnetically conductive column 1 and the magnetically conductive lower plate 6 are connected to form a In one piece, the permanent magnet 5 is connected with the magnetic upper plate 4 and also connected with the magnetic lower plate 6. There is a drive coil 2 on the magnetic column 1, and the first fixed coil 3 is wound and glued on the magnetic column 1, and the drive coil 2 is coupled with the first stationary coil 3 in antiphase.

[0042] The second embodiment: if figure 2As shown, it is composed of a magnetically conductive column 1, a drive coil 2, a first fixed coil 3, a magne...

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Abstract

The present invention relates to a low-inductance electromagnetic drive without driving magnetic flux circuit, which comprises a magnetic pole, a drive coil, an upper magnetic inductive board, a permanent magnet and a lower magnetic-inductive board. The magnetic pole is integrated with the lower magnetic-inductive board, and the permanent magnet is located between the upper magnetic-inductive board and lower magnetic-inductive board. The drive coil is wrapped around the magnetic pole and is movable in the axial direction. The electromagnetic drive further comprises the fastening coil, and the fastening coil is fastened to a certain proper place of the magnetic flux circuit of the drive coil. Furthermore, the fastening coil is connected with the drive coil in opposite phase. The present invention is characterized in that the drive source applies the excitation to the fastening coil in an equivalent quantity as the drive coil but in opposite phase, so that the excitation energy generated by the current flowing through the speaker for the magnetic flux circuit system is reduced to the minimum, the inductance quantity of the speaker is decreased to the minimum, and the sound distortion of the vibration system connected with the drive coil is decreased.

Description

technical field [0001] The present invention relates to an electromagnetic driver, in particular to a low-inductance electromagnetic driver that does not excite a magnetic circuit for good audio recording and playback effects. The electromagnetic driver can be used in loudspeakers, earphones and acoustic sensors. Background technique [0002] Audio-visual devices have entered the field of people's lives. In these audio-visual devices, there are sound→electricity and electric→acoustic transducers, and commonly used are electric loudspeakers, earphones and acoustic sensors (microphones). They use the effect of the magnetic field on the current-carrying conductor to realize the energy conversion between electricity and sound. They are composed of a drive system, a vibration system and a support system. Electromagnetic transducers are used in the drive system, and these transducers are driven. The coil, the driving coil has an inductance. When the frequency changes, the inducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/00H04R9/00H04R9/04
Inventor 吴琪君
Owner 吴琪君
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