Double-coil dual magnetic gap transducer

Double-coil dual magnetic gap transducer

CN
  • CN 101,026,901 A
  • Filed: 02/20/2006
  • Published: 08/29/2007
  • Est. Priority Date: 02/20/2006
  • Status: Active Application
First Claim
Patent Images

1. , a kind of double-coil double-magnet gap transducer, comprise magnetic circuit and link all-in-one-piece carriage or framework with it with permanent magnet, two coaxial isometrical annular magnetic gaps and a coil rack that inserts magnetic gap, wound in parallel electric wire insulated from each other and constitute two coils on it, the taper shape or the ball that link together with coil rack and elastic damping plate push up shape or planar shaped vibrating diaphragm or plane phonation board, piston motion by coil rack drives described vibrating diaphragm or phonation board vibration sounding, perhaps detect the sound pressure variations of sound and in coil, sense corresponding audio signal, it is characterized in that by described vibrating diaphragm:

  • The top crown of described magnetic circuit and bottom crown are circular flat boards that is provided with central axis hole;

    An or oily shape flat board that is provided with two central axis holes;

    Be provided with the rare-earth permanent magnet of axial charging between described top crown and the bottom crown;

    The N utmost point of described permanent magnet and S utmost point pole-face have symmetrically surface electric field intensity or equal magnetic figure;

    Having enough big volume and magnetic energy product makes the interior magnetic induction intensity of described annular magnetic gap reach an annular ndfeb magnet or fan-shaped or disc or the ring piece shape ndfeb magnet that above uniform thickness is uniform of hypersaturated stateConstitute two coaxial isometrical annular magnetic gaps between the vertical side face of central axis hole with the outer peripheral face of described top crown and the coaxial mounted cylinder shape magnetic of bottom crown and described top crown and bottom crown, go into coaxial mounted two coils in described annular magnetic gap interpolation, two coils of regulation around to and the sense of current of flowing through coil, make described coil produce unidirectional electric power F in same work momentCentral axis with described top crown and bottom crown axis hole is a vertical axis of symmetry, bisector X-X axis with described permanent magnet 1/2nd axial heights is a horizontal symmetry axis, described double-coil double-magnet gap transducer has about aspect geometry and the magnetic property, laterally zygomorphic two groups of magnetic circuits and in geometry and electrical property side and about, laterally zygomorphic two groups of coil circuits, stipulate two described coils after being connected in series around to just opposite, the wire cross-section of two described coils is long-pending, the absolute letter of the number of turn and inductance value is equal to each other, described double-coil double-magnet gap transducer is a transducer with resistance load characteristicsThe carriage that non-magnetic conduction rigid material is made be bonded on the outer side plane of described bottom crown and by the securing member that one group of non-magnetic conduction rigid material is made described cylinder shape magnetic, bottom crown, permanent magnet and top crown are connected to as a whole,Perhaps, described top crown, permanent magnet, bottom crown are embedded into the uncovered cylinder inwall that is installed in the framework that a non-magnetic conduction rigid material makes and the convex column by the framework axis part connects to described cylinder shape magnetic and described bottom crown, permanent magnet, top crown as a whole.

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