SU100722A1 - Electric oscillatory circuit - Google Patents

Description

The proposed oscillating circuit, designed for operation in the range of short and meter waves, belongs to the type of known devices of the same purpose, consisting of an adjustable air condenser and an inductance coil, the magnitude of which varies with the turn of the capacitor rotor.

A feature of the proposed oscillatory circuit is the implementation of an inductor with flat semicircular coils, electrically connected by meleda by step transitions and located in the planes of the stator plates of the capacitor with the possibility of introducing rotor plates in between the turns of the coil to change the inductance of the latter.

The proposed constructive implementation of the oscillatory circuit ensures its small size and a high degree of overlap in frequency.

FIG. 1, the proposed oscillatory circuit is shown in perspective; in fig. 2 - view of the inductance from above; in fig. 3 - electrical circuit in principle; in fig. 4 - its equivalent circuit.

The circuit consists of an air condenser, I have it; its two stator /

and 2 and ONE abundance of the rotor 3, and the inductance 4.

Stators 1 and 2, each with several semicircular brass plates, are isolated from each other. The rotor 5 also has several brass semicircular plates and rotate 180 °.

Inductor 4 is located above the stators and is fixed with its ends on each of them. The coils of the coil have a semicircular shape, are made flat and are electrically connected with each other by step transitions.

FIG. 2, which shows the top view of the coil 4, explains how the stepped transitions between the turns provide the possibility of making them flat.

The inductor 4 is located relative to the stators 7 and 2 and the rotor 5 of the capacitor in such a way that the plastgites of the rotor can freely enter the gaps between the turns of the coil, without touching the latter.

FIG. 3, showing the circuit diagram of the circuit, and in FIG. 4, showing its equivalent circuit, the following notation is used.

L and B - points of connection of the circuit to the lamp, Ci - capacity between the stator 1 and the rotor 3, C - CAPACITY - between the stator 2 and the rotor 3; L - inductance of coil 4.

As can be seen from the equivalent circuit, the proposed circuit is a parallel resonant oscillating circuit consisting of two branches, capacitive and inductive. The EMC-bone branch is formed from two series-connected tanks C and Co, the inductive branch is from the inductance L of the coil.

The principle of the contour following.

When the rotor is inserted into the stator (the 1st position of the rotor in Fig. 3), the proper capacitance of the circuit has a maximum value, and the self-inductance of the circuit also has a maximum value. At the same time, the contour's own wavelength has a maximum value.

When the rotor is removed from the stator, its plates enter the gap between the turns of the coil, reducing its inductance. Loop capacity is also reduced. In the 2nd position of the rotor, the intrinsic wavelength KOHTjpa has a minimum value.

Adjustable immersion depth

“rotor” in the coil and the gap between the plates and turns, you can adjust the change in the inductance of the coil in a wide range, and therefore, the overlap of the contour in frequency. The overlap ratio can be about 5-7.

Subject invention

An electric oscillating circuit consisting of an adjustable air condenser, the stator and rotor plates of which have a semicircular shape, and inductors, the magnitude of which varies as the rotor of the constator rotates, so that size reduction and overlap in frequency, the coil windings have a semicircular shape, are made flat, electrically connected between themselves by step transitions and are located in the planes of the stator plates with the possibility of introducing rotor plates tin capacitor in the intervals between the turns of the coil to change the inductance of the latter.

(with,)

/ f-e rotor position i / 2nd rstor position.

FIG. four