DE391228C - Circuit arrangement for frequency multiplication by means of highly saturated iron chokes or transformers - Google Patents

Description

GERMAN EMPIRE

ISSUED
AMl. MARCH 1924

REICH PATENT OFFICE

PATENT LETTERING

-JVl 391228- CLASS 21a GROUP 66

(L55553

C. Lorenz Akt-Ges. and Dr. Felix Gerth in Berlin-Tempelhof.

Circuit arrangement for frequency multiplication by means of highly saturated iron chokes

or transformers.

Patented in the German Empire on May 6, 1922.

There are procedures! known for the purpose of frequency multiplication to use the impulse excitation with the help of highly saturated, iron-closed transformers. The difference from the shock excitation by means of spark gaps, the spark gap after the first shock and the resulting energy release on the useful circle goes out and only knocked through again with the next impact remains, the useful circuit remains with the shock excitation by a transformer always with the same! tied together. Of the

$ 39122

The entire wattless current flows through the transformer and works energy-consuming on the useful electricity. At the same time, since the curve shape is determined by the Iron is distorted, the formation of harmful harmonics in the useful circle favored.

According to the invention, these disadvantages are avoided in that the highly saturated ίο frequency multiplication transformer is switched into the diagonal of a bridge arrangement, the branches of which are mutually detuned. In the circuit (Fig. I) representing an embodiment, m is the high-frequency _{machine, C 1 is} a capacitance, Z _{1 is} a self-induction, both of which are approximately matched to the fundamental frequency of the machine. Furthermore, the transformer t _lt is located in the fundamental frequency circuit, which is highly saturated by the fundamental frequency current and is shown in the circuit as an autotransformer. C ₁ , I ₂ and c '", l \ are the bridge branches that are tuned to a certain higher harmonic of the fundamental frequency.

The frequency transformer is switched on in a diagonal of the bridge arrangement between points α and b in Fig. 1, while the two diagonal points c and d are connected to the useful circuit or the antenna. The mode of operation of the arrangement is as follows:

If one initially imagines a bridge branch with the capacitance C ₂ and the self-induction I ₂ omitted and the antenna coupled to the oscillation circuit c \, l \, t _x , which is tuned to a higher harmonic of the fundamental frequency, the normal circuit is obtained the frequency multiplication by shock excitation with the aid of a highly saturated transformer with the disadvantages mentioned above. If, on the other hand, the circuit according to Fig. 1 is completed, the high-frequency current flowing through the transformer t _{t is} distributed evenly over the two branches as long as the two bridge branches have exactly the same dimensions, so that the current in each of the two bridge branches is half that of the transformer current flowing through.

If, on the other hand, the two branches are out of tune with one another in such a way that z. B. in Fig. 1 the self-induction I _{2 is} increased and l \ is reduced, or that according to Fig. 2 the connection point b on the self-induction coil is slightly shifted, a circular current forms in the bridge branches, which flows through the bridge tuning means in their direction and can assume much larger amounts than the current flowing through _{the transformer J 1.}

Points c and d are given a certain voltage with respect to one another, and the antenna connected to these points and tuned to the same higher harmonics is induced.

The strength of this induction, ie the degree of coupling, is determined by the size of the detunings. As a result of the described arrangement it is achieved that the high, wattless current, which with the normal frequency multiplication method has to flow through the transformer and consequently causes high iron losses, in the bridge branches in which there are no iron coils and the losses can be reduced to a minimum, occurs, and that the transformer f _{x is} traversed mainly by watt current.

The antenna can be connected directly to the diagonal points of the bridge (Fig. 1) as well as transformatively with it connected (Fig. 2 and 3).

For the rest, the same reference numerals apply to the last two circuits.

Claims (4)

Patent Claims: 1. Circuit arrangement for frequency multiplication by means of highly saturated Iron chokes or transformers, characterized in that the frequency multiplication circuit a bridge arrangement, consisting of self-induction and capacitance, forms in one diagonal the iron-saturated multiplier transformer Hegt, and its bridge branches are out of tune with each other. 2. Circuit arrangement according to claim i, characterized in that the Frequency multiplication circuit is tuned to a higher harmonic of the fundamental frequency. 3. Circuit arrangement according to claim ι or 2, wherein the useful circuit or the antenna is connected to the second diagonal of the bridge directly or by means of a transformer. 4. Circuit arrangement according to claim ι or one of the subclaims, whereby the useful circuit or the antenna is connected to only one branch of the bridge directly or by means of a transformer. 1 sheet of drawings.