SU665378A1 - Ferromagnetic multiplier of frequency by even number - Google Patents

Description

The invention relates to radio electronics and electrical engineering and can be used as a high frequency power source.

Ferromagnetic multipliers are known an even number of times with DC magnetization of the cores and with spontaneous polarization of the cores 1. Some of them contain a separate DC source and a bias circuit, a low frequency filter, or a filter plug. Having a separate DC source is a disadvantage of such frequency multipliers. In addition, when using a source with a constant magnitude of the bias current, the voltage at the output of the multiplier largely depends on the input voltage, load resistance, and other factors. The second multipliers do not have a separate magnetisation circuit and a constant current source.

The disadvantage of such multipliers is that a decrease in the input voltage, a change in the load, and a number of other factors lead to unstable operation of the multiplier, to the breakdown of oscillations and the non-fulfillment of the self-excitation condition when the multiplier is turned on.

Frequency doublers with magnetization are also known, in which there is no separate DC source 1. However, the circuit solutions used

at the same time, they are specific only for frequency doublers and do not extend to multipliers with greater multiplicity.

The prototype of the proposed device is a ferromagnetic frequency multiplier an even number of times containing the cores, whose number is equal to the multiplication factor, with the input and output windings located on them, the windings of the magnetization, and the additional windings divided into two consistently connected

groups of windings, each of which is placed on the corresponding half of the cores and shunted at least

two counter-connected diodes, and the circuit of the bias windings is connected between the common points of the diodes of both groups of additional windings 2.

However, in this device, the bias circuit of the cores contains a large number of diodes, which reduces the usefulness of the multiplier. The purpose of the invention is to simplify the device and increase its reliability.

This goal is achieved by having an even number of times in a ferromagnetic frequency multiplier containing cores, the number of which is equal to the multiplication factor, with input and output windings located on them, bias windings, and additional windings divided into two coherently connected winding groups, each of which are located on the corresponding half of the cores and are shunted by at least two opposite-connected diodes, with the winding circuit of the magnetic biasing and connected between the common points of the diodes of the two additional groups of windings, the two introduced additional diode, each one power electrode is connected to one end of a group of additional windings and other -. to the corresponding end of the second group of additional windings.

FIG. 1 shows a frequency meter diagram.

On the cores 1-8 are placed the input windings 9-10, 11-12, 13-14, additional windings, divided into two groups: 15i-164 and ISs-ISs, windings 16-17 bias, output windings 18, 19. A group of additional windings are connected to counter-connected diodes 20, 21, and a group of additional windings ISs-ISs to diodes 22, 23 connected counter-sequentially in the opposite direction as compared to diodes 20, 21. A bias circuit containing windings 16-17 and choke 24 is connected from one side to the common point of the diodes 20, 21, on the other hand to the common point chke diodes 22, 23. The throttle 24 is designed to generate resistance bolschoy current multiplied frequency and decreasing the variable component of the bias current. Similar ends of winding groups 15i-154 and ISs-ISe are connected by diodes 25 and 26, the switching direction of which coincides with the switching direction of the diodes 20, 23 and 21, 22.

The process of bias current formation in the proposed scheme is illustrated by timing diagrams depicted in FIG. 2, ad FIG. 2, a and b show diagrams of EMF (voltages) at the ends of a group of windings 15i-164 and 155-158, respectively, with an open magnetic circuit and with a bias current flowing. Due to the action of diodes 20-23, 25, 26, arithmetic addition of these emfs occurs. The diagrams of EMF pulses applied to the bias circuit, corresponding to these cases, are shown in FIG. 2, b and g

It is clear from the above that the general principle of operation of the proposed frequency multiplier does not differ from the prototype and all its advantages are preserved, although this is done with a smaller number of diodes in the bias current shaping circuit, which simplifies the multiplier and increases the likelihood of its trouble-free operation.

Formula and 3 about b and e and

Ferromagnetic frequency multiplier even number of times, containing cores, the number of which is equal to the multiplication factor, with input and output windings, bias windings, and additional windings, divided into two according to them - serially connected groups

windings, each of which is located on the corresponding half of the cores and are shunted by at least two steps of anti-successively connected diodes, a chain of windings podmagpichivaniya

included between the common points of the diodes of both groups of additional windings, characterized in that, in order to simplify and increase reliability, two additional diodes are introduced, each of which

one power electrode is connected to one of the ends of one group of additional windings, and the other to the corresponding end of the second group of additional windings.

Information sources,

taken into account during the examination 1. Bashdas AM and others. Ferromagnetic frequency multipliers. M., “Energie, 1968, p. 30, 33, 38, 90, 111, 116.

2. For the number 2475287/07, cl. H 02M 5/16, 1977, on which the decision to issue an author's certificate was made.

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