SU583783A3 - Converting device - Google Patents

Description

one

The invention relates to transducers that are used as loudspeakers or a microphone.

The known conversion devices used to convert electrical energy into translational mechanical movement and back usually have a relatively large stationary permanent magnet paired to interact with a moving electric coil, which is connected to a membrane or septum. The latter is arranged in such a way that, when the coil is moved, it reports the corresponding movement to the membrane or septum and, when the membrane moves, it reports the corresponding movement to the coil. When using such a device as an exciter-. Element in a loudspeaker for a television or radio. Broadcast reception requires particular care during manufacturing to ensure accurate tolerances between the moving coil and the permanent magnet. In addition, the mass of the moving coil is very critical due to acoustic tonal equilibrium problems. Consequently, such a device requires substantial

manual adjustment and thoroughness in the manufacturing process. This is a very laborious operation in the manufacturing process,

The purpose of the invention is to simplify the design and ensure reliability in manufacturing. This is achieved by the fact that in the device the pole tips are mounted on each protruding

the end of the core, and the elastic is a metallic metal gasket located in contact with the pole lugs of the 1kami and an e-valve between the ends of the core is sewed, and on the gasket

a moving permanent magnet interacting with an electromagnetic field and moving in an electric field created by a stationary electric Katushka.

. The permanent magnet has a high specific moment with respect to the field of the electric coil. The preferred form of such permanent magnets are cobalt-rare earth.

magnets.

Fig. 1 is a schematic diagram of the device illustrating a transversely magnetized rectangular magnetic element; Fig. 2 is a schematic diagram of the device for maximum magnetisation, the permanent magnet has the shape of a ring, which provides for unaligned magnification; in fig. 3 - the KGf is a permanent magnet of the i-shape, and the hanging system contains an elastic gasket between the permanent magnet and the steel by the HCJM pole; 4 is a circuit diagram of a converter that provides 360 radial magnetization by return; in FIG. 5, the same, except for the absence of a return; on FS b is a circuit diagram of a converter in which a pair of coils exert a two-sided effect on a permanent magnet.

When using a permanent magnet as an element for converting electrical energy :: to mechanical and vice versa, it is important that the permanent magnet has a high resistive rotational moment from a unit of weight of the moving part of the tuner to an external magnetic field. Such a torque is the product of the intrinsic magnetization of the permanent magnet and the intensity of the external field. When using cobalt rare-nesting gagnites, a very co-poTimft significant self-magnetic electric level has an almost complete proper level of magnetization. Accordingly, a constant mantle element with a small mass of a cobalt rare earth type can cause a very large force or a growing mole in the external field.

The rotational moment in the cobalt rare-earth should be added by a unit of mass more, approximately 10 times as compared with such permanent magnetic materials as alnico. Of the rare earths --5eline elements, samarium doped with cobalt provides the greatest coercive force. However, mixtures of rare earth elements can be doped with cobalt to obtain satisfactory ones.

The membrane or partition 1, which may be ring-shaped or conical, is rigidly connected to a constant magnet 2 with a thrust 3. Moving the magnet 2 causes a commensurate movement of the membrane 1, and the movement imparted to membrane 1 BtJsoBcjT is a comparable displacement of the magnet 2 The magnet is installed in a certain position to interact with an external magnesia field, which can be formed by an electromagnetic device consisting of core 4 and coil 5. Coil 5 is wound on U-shaped core 4 (see Fig. 3) The ends of two pole ends Ikov 6 are placed on the corresponding ends of the core 4, while around- S

a gap is developed between the ends of the tips 6, the Elastic non-metallic gasket 7 is attached to the ends of the tips b, in order to close the gap between them. Permanent magnet 2 is attached to gasket 7 so that it goes along with permanent tips 6 and magnet 2, which interacts with coil 5.

To excite a transducer, for example a loudspeaker, an electrical signal is applied to the coil to form a corresponding magnetic field which interacts with magnet 2. This interaction with the permanent magnet 2 converts the electrical signal into a corresponding mechanical movement in the permanent magnet 2. This movement is then transmitted to the membrane 1, which emits a sound corresponding to the electrical signal 1connected is coil 5.

When the device is used as a microphone, the Meiv6paHa 1 vibrates in the mood with the sound vibrations falling on it. This causes movement in magnet 2, which forms the corresponding magnetic field in the electromagnet to create an electrical signal leaving the transducer using coil 5.

There is a high interaction between the field of the permanent magnet 2 and the field of the electromagnetic device. Large tolerances between magnet 2 and core 4 are possible than with a moving coil speaker. These tolerances improve the reliability of the conversion device, taking into account time, and significantly reduce the manufacturing cost of the device. In addition, coil 5, while stationary, is no longer limited to weight. Accordingly, it can be provided with a high impedance winding, thereby eliminating the need for a communication transformer. .

Claims (1)

1. A transformer device containing a U-shaped core of a magnetically permeable material and a stationary electric coil wound around the core creating an electromagnetic field, so that, in order to simplify the design and ensure reliability in manufacturing . Pole tips are mounted on each protruding end of the core, and elastic is non-metal7 (the strip is placed in contact with the pole ends of the JM and closes the gap between the ends of the core, and