SU943581A1 - Electromagnetic suspension - Google Patents

Description

(B) ELECTROMAGNET SUSPENSION

one

The invention relates to instrument engineering and can be used for fixing bodies in space without the use of mechanical supports.

Known electromagnetic suspension, which contains an electromagnet placed on a fixed base, in series with the winding of which a capacitor is turned on, and an additional electromagnet attached to the object to be suspended, and an additionally introduced capacitor 1 is connected to its winding.

In some cases, the placement of an additional body on a suspended object is unacceptable, since its own weight reduces the payload of the suspension. Thus, the main disadvantage of the known suspension is insufficient performance.

The purpose of the invention is to improve the performance of the electromagnetic suspension.

To achieve the goal, the electromagnetic suspension containing the main and additional electromagnets, the windings of which are connected to the corresponding capacitors, the main electromagnet is placed on a fixed base, provided with two cores of which is located above the poles of the main and additional electromagnets, while the additional electromagnet is placed on a fixed base .

FIG. 1 shows the design of an electromagnetic suspension; 2, an electromagnetic circuit

15 suspension.

Claims (1)

Electromagnetic suspension Contains the main electromagnet, for example, an armor structure with a magnetic core 1 and a winding 2, an additional electromagnet with a magnetic core 3 and a winding C. The main electromagnet and the additional magnet are mounted on a fixed base 5. On the suspended object 6, the cores 7 and 8 are fixed. JT of a non-magnetically conductive substance spA 9- and the anti-Polar side of the suspended object 6, as well as along the remaining spatial axes, can be installed with similar electrical connections. 2 of the main electromagnet 3 is connected via a capacitor 10 (Fig. -2) to an alternating voltage source 11, and a capacitor 12, anchor 7 and 8 is attached to the winding of the additional electromagnet (see FIG. 6) to the winding object 6, together with the magnetic cores 1 and 3 electromagnets, through the corresponding working air gaps form a series magnetic circuit. Thus, there is a strong magnetic connection between the main and additional electromagnets, the depth of which depends on the size of the air gap. The windings of electromagnets 2 and k with capacitors 10 and 12 form two magnetically coupled resonant circuits. It is known that if the coupling coefficient between the circuits exceeds the critical value, then the resonant characteristic takes the form of a two-humped curve (not shown). The device works as follows. The modes of operation of the electromagnetic suspension are set by selecting the operating frequency of the variable voltage source 11. If the frequency of the source 11 is such that the operating point positions the two-hump curve on the downward branch of the region of the first maximum, then the currents of the main and additional electromagnets are almost in-phase magnetic fluxes created by them coincide in direction and between the fixed magnetic cores 1 and 3 and the cores 7 and 8 of the suspended object 6, the force of attraction acts. The displacement of the suspended object 6 towards reducing the air gap by the action of a force that coincides in direction with the force of attraction causes an increase in the magnetic conductivity. The resultant inductance of the resonant circuit increases and its resonant frequency decreases. At a constant frequency of the source 11 of the alternating voltage, this leads to a decrease in the currents in the windings 2 and electromagnets, a decrease in the tractive effort and the age of the object 6 to the initial position. If you choose a working gs1chku magnetic suspension nl low and | it aiwi areas of the second maximum, then the currents in the windings 2 and the main and additional electromagnets and magnetic fluxes created by them are in antiphase, and between the magnetic cores 1 and 3 and the cores 7 and 8 repulsive forces act, sharply increasing with the displacement of the object 6 in the direction of decreasing the working gap and restoring the equilibrium position. The device of the proposed electromagnetic suspension was considered on the example of armored electromagnets, however electromagnets and other structures, such as rod ones, can be used. It is only important that the cores 7 and 8 form a series magnetic circuit with the magnets of the electromagnets. , - / The weight of an additional electromagnet due to the presence of a copper wire winding having a specific weight greater than the specific weight of electrical steel, is much greater than Korea. Therefore, placing an additional electromagnet on a stationary base allows you to unload the electromagnetic suspension and thereby increase the useful weight of the suspended object. As a result, the performance of the proposed electromagnetic suspension is higher than that of the known device. Claims of Electromagnetic Suspension, containing primary and secondary electromagnets, the windings of which are connected to corresponding capacitors, the main electromagnet is placed on a fixed base, about t. Ri and that in order to increase productivity, it is equipped with two cores, each of which is located over the poles of the primary and secondary electromagnets, while the additional electromagnet is placed on a fixed base. Sources of information taken into account in the examination 1. USSR author's certificate in application K 28187 5/21, cl. G 01 R 1/10, 21.0.9.79.