SU19275A1 - Device for adjusting the phase shift between the voltage at the source of electrical alternating current and the voltage at the receiver of this current without changing the voltage at the receiver - Google Patents

Description

The present invention relates to a device for controlling the phase shift between the voltage at the AC source and the voltage at the receiver of this current without changing the voltage value at the receiver. The use for this purpose of one or several impedances connected in series to the wires connecting the current source to the receiver and one or several impedances connected in parallel to the receiver is generally known. In order to be able to simultaneously change the capacitors of the capacitors that are part of these impedances in such devices, the capacitors are mechanically connected to each other. In the proposed device, in order to obtain a smooth adjustment of the magnitude of the phase shift, the blades of the capacitors are given a special shape, calculated as a function of frequency and other factors determining the operation of the circuit.

In FIG. Figure 1 shows a circuit diagram for the case of switching on two impedances, in series and parallel to the receiver; FIG. 2-form capacitor plates.

On the circuit of FIG. 1, numbers 1 and 6 denote, respectively, the source and receiver of alternating current, numbers 2, 5, 7, and 10 self-induction coils, which are part of the impedances, and numbers 3, 4, and 8, 9 are capacitors mechanically connected in pairs.

A change in the capacitance of a single capacitor, for example 4, connected in parallel to the receiver, corresponds to a simultaneous change in the capacitance of the capacitor 3 connected in series with it. The plates of these air conditioners are shaped, as defined by an equation expressed in polar coordinates.

+ WG

natah: p:

(and .. h

()

for capacitor plates 3

R/. J /

ъ.

+ Pl

B (COS (p) for capacitor plates 4.

Here p and p / and are the radii of the vectors for the plates of the capacitors 3 and 4, and a, b, 1, b,

l.;

And Pi are values that come from current frequency and other factors. The latter values are constant for each particular case. Plates with such outlines are depicted in FIG. 2, where the dotted line shows the capacitor plate 3, and solid lines show the capacitor plate 4. Capacitors 8 and 9 are completely similar to capacitors 3 and 4. By performing the plates using the above formulas, it is intended to ensure a smooth adjustment of the phase shift between the voltage at the current receiver at maintaining a constant voltage value at the receiver.

The subject of the patent.

A device for controlling the phase shift between the voltage at the source of electrical alternating current and the voltage at the receiver of this current without changing the voltage at the receiver, consisting of one or several impedances connected in series to the connecting sources 2 -

nickname with a receiver of the wire, and one or more impedances connected between these wires (parallel to the receiver), with variable capacitors ,. included in the specified impedances, are mechanically bonded between the baking in order to be able to simultaneously change the capacitances of these capacitors, characterized in that the plates of these capacitors 3 and 4 are shaped, calculated by the formulas:

cos

K + f,

F d-s / ncp)

R

ko2 dencator 3

plates

: Tin cond: /. (

a 4 where p

and about,.-

condenser band

the radius vectors for the capacitor plates 4 and, respectively, 4, a, b, i: k, and constants that depend on frequency and other factors.