RU2020622C1 - Electric capacitor - Google Patents

Abstract

FIELD: electrical engineering. SUBSTANCE: electric capacitor has electrodes made in form of Moebius band. EFFECT: enlarged operating capabilities. 2 cl, 6 dwg

Description

 The invention relates to electrical engineering and can be used to create capacitors for energy storage.

 Known washer capacitor made in the form of metal insulated plates of a ring shape.

 Known flat electric capacitor, in which to increase the specific capacity and mechanical strength of the electrodes are made U-shaped.

 A known capacitor containing two groups of electrodes made of equal parts of a hollow cylinder cut along a generatrix, and two additional plane-parallel electrodes.

 A known capacitor containing three groups of electrodes, each electrode is made in the form of a ball located symmetrically one relative to the other.

 The closest in technical essence to the proposed one is an electric capacitor containing two groups of electrodes made in the form of rings.

 However, the presence of inductance in these capacitors reduces the capacitance of the capacitor when used in electrical and radio circuits, especially at high frequencies.

 The purpose of the invention is the increase in capacitance.

 Figure 1 shows a diagram of an electric capacitor, one of the electrodes of which is twice as large in area as the other electrode; figure 2 is a diagram of the manufacturing process of this capacitor; figure 3 - its equivalent circuit; figure 4 is a diagram of a capacitor with the same area electrodes; figure 5 - diagram of the manufacturing process of the capacitor shown in figure 4; in Fig.6 is an equivalent circuit of the capacitor shown in Fig.4.

In figure 2, 5 adopted designations (A _i , B _i , C _i , D _i (i = 1,2,3) - the designation of the faces (vertices) of the electrodes (plates) of the capacitor 5.

 The capacitor (see Fig. 1) contains two flat, closed, isolated from each other electrodes 1, 2, contacts 3, 4, electrically connected respectively with electrodes 1, 2, separated by a dielectric 5, while the electrodes 1, 2 are made in the form Mobius stripes.

 The electrode 1 is located at a certain distance R from the surface of the electrode 2 along its entire length.

In FIG. 2 shows how to perform the capacitor shown in FIG. The numbers 1.1 and 1.2 and 2 (see Fig. 2, a) denote tapes of width h made of the necessary material from which the capacitor electrodes are made. The tapes are laid on top of each other along their length. Moreover, between the tapes 1.1 and 2, as well as between the tapes 2 and 1.2, if necessary, a dielectric is placed over their entire area (they are not shown in Fig. 2). Then they give the whole structure the shape of a Moebius band, matching point D ₃ with point A ₁ , C ₃ -B ₁ , D ₂ -A ₂ , C ₂ -B ₂ , D ₁ -C ₃ , C ₂ -D ₃ ( see figure 2, b)
As the dielectric 5 can be used capacitor paper. One of the layers of oxide paper may contain boron. The dielectric 5 may be made of an active dielectric, for example a ferroelectric.

From the equivalent circuit of the capacitor 1 (see figure 3) its capacity
C = ε˙ L ˙ h / R ₁ + ε˙L˙h / R ₂ , where L is the length of electrode 2;
h is the width of the electrodes 1, 2;
R ₁ , R ₂ - the distance, respectively, between the electrode 2 and the electrodes 1.1, 1.2;
ε is the dielectric constant of the dielectric.

When R ₁ = R ₂ = RC = 2ε Lh / R.

 In FIG. 4 shows the design of a flat capacitor in which the electrodes 1, 2 have the same length. In this case, a slit-shaped hole 6 is made in the electrode 2. Through this hole 6, the opposite sides of the plate from which the electrode 1 is made are connected to each other.

The manufacturing process of the capacitor (figure 4) is shown in figure 5. The electrodes 1, 2 are made in the form of plates of the necessary material, while in the plate 2, a hole 6 is made (see Fig. 5, a), and in the plate 1 - narrowing (see. Fig. 5, b). The length of the narrowing should not exceed the length of the window. In general, the plates may be of different sizes. Then, the plate 1 is cut into two parts by narrowing, one of them being placed on top, the plates 2 on one side of the hole 6, and the other placed on the bottom of the plate 2 on the other side of the hole 6, and separate parts of the plate 1 are welded (welded) to each other through hole 6 (see figure 5, c) in particular at a right angle. From the structure depicted in FIG. 5, c, a Moebius band is formed so that the points A ₁ , B ₁ , A ₂ , B ₂ are connected to the points D ₁ , C ₁ , D ₂ , C ₂ , respectively (see FIG. 5, d). From the equivalent circuit (see Fig.6)
C = ε˙L˙h / R, where h _e is the equivalent electrode area;
R is the distance between the electrodes.

 As a result of the use of this capacitor, the capacitance increases due to the elimination of parasitic inductances of the electrodes and dielectric; the influence of electric fields on the ends of the electrodes is eliminated, since there is no beginning and end in the Mobius strip; increases the mechanical stability of the device, since it is difficult to shift the electrodes relative to each other, which helps to increase the stability of electrical parameters.

Claims (2)

 1. ELECTRIC CAPACITOR, containing flat, closed, insulated electrodes from one another, separated by a dielectric, characterized in that each of the electrodes is made in the form of a Moebius tape.  2. The capacitor according to claim 1, characterized in that in one of the electrodes there is a slit-like hole through which another electrode is passed.

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