SU1233818A3 - Transformer for televison set line sweep circuits - Google Patents

Description

2, a transformer according to claim 1, characterized in that the additional partitioned winding is located in the slots of the primary winding frame over the latter and is separated from it by a dielectric layer.

3, Transformer according to claim 1, T - characterized by the fact that the primary winding occupies only a part of the frame slots, and an additional winding is wound into the remaining free slots.

4.Transformer according to claim 1, about t - l and h aa and so that part of the sections of the additional winding is located verification of the primary winding and is separated from it by an insulating layer,

and the other part is located directly at the base of the free grooves of the primary winding frame.

The invention relates to electrical engineering, in particular to low-power transformers used in the horizontal scanning schemes of a television receiver.

Known low-power transformers containing a ferromagnetic core, a primary winding assembled on an insulating frame, and a secondary winding located over the primary winding.

The disadvantage of transformers is the limitation of the level of high voltage generated at the output of the tidal winding and the high level of pickup when transmitting high-frequency signals,

The closest in technical essence to the present invention is a low-power high-voltage transformer comprising a ferromagnetic core, a primary winding assembled on an insulating frame, and a secondary winding placed on an insulating cylindrical frame with grooves located above the frame of the primary winding,

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5.Transformer on PP. 1 and 3, characterized in that the additional winding is located in the slots of the primary winding frame at one of its ends.

6.Transformer on PP. 1 and 3, characterized in that the additional winding is located in the slots of the frame of the primary winding, in its middle part.

7.Transformer on PP. 1 and 2, characterized in that the additional winding is wound in the direction opposite to the direction of the secondary winding.

8. Tra nsformator. According to claim 1, that is, in order that the secondary winding occupies only a part of the grooves of its framework, and in the remaining free grooves there is an additional winding.

 A disadvantage of the known transformer is a high level of interference in the transmission of high-frequency signals, due to the presence of a resonant circuit formed by the scattering inductance and the parasitic capacitance of the second winding.

The aim of the invention is to reduce the level of interference.

The goal is achieved by the fact that a transformer containing a ferromagnetic core, the primary winding, assembled on an insulating frame, and the secondary winding, is placed on an insulating cylindrical frame with grooves located on top of the frame of the primary obelinka, provided with an additional partitioned winding, diode and capacitor, the primary and secondary windings are also partitioned, with the additional winding located on the slots of the frames of the primary or secondary windings, the first end of the additional winding The terminal is grounded and the second is connected to the load through a diode and a capacitor.

Additional partitioned winding is located in the frame slots.

the primary winding on top of the latter is separated from it by an insulating layer.

The primary winding is occupied only by a part of the frame grooves, and an additional winding is wound into the remaining free grooves.

Some sections of the additional winding are located on top of the primary winding and are separated from it by an insulating layer, while the other part is located directly at the base of the free slots of the primary winding cage.

The additional winding may be located in the slots of the primary winding frame, at one of its ends or in its middle part, or wound in the direction opposite to the direction of the secondary winding.

The secondary winding occupies only a part of the grooves of its frame, and in the remaining free slots there is an additional winding.

Fig. 1 shows the shape of the IM pulse of the secondary winding; in fig. 2- transformer structures; in fig. 3 shows the connection circuit of the transformer windings; in fig. 4 - pulse shape on the secondary and secondary windings in the interval of the scanning period; in fig. 5 a, b - the shape of the pulses at the output of the proposed and known devices; in fig. 5 to d - the same, in idle mode; in fig. 6 is a plot of the relative level of pickup from the scattering ratio function F / F; in fig. 7-17 are variants of the relative structural arrangement of the sections of the three windings.

The transformer contains a core 1 of the closed type, an insulator about the 1st frame 2 of the primary winding with slots 3 and the primary winding 4, sectionally located in the slots. The additional winding 5 is wound over the primary through the insulation layer 6.

The insulating frame of the secondary winding 7 is located on top of the frame) Primary winding and provided with grooves 8 on the outer surface, in which sections of the secondary winding 9 are located. A horizontal sweep circuit 10 is turned on. Rectifier 11 is turned on at the output. and the second end 13 is connected. with a diode 14 and a capacitor 15. You338184

Water 16 from the additional winding is connected to the load.

The device works as follows.

B The primary winding is connected to the line scanning circuit 10, and the secondary winding is connected to the capacitive-gate circuit of the smart voltage, while a 15 kHz pulse is applied to the primary winding.

The relative arrangement of the primary 4 and secondary 9 and additional 5 windings allows to vary the level of magnetic communication, for example, t5 to reduce the connection of the additional and primary windings in comparison with the level of magnetic communication of the additional and secondary windings. At the same time, the dissipation flux of the transformer is switched in the scanning interval of the horizontal scanning circuit when the diode 14 is opened,

During the sweep period, the additional winding 5 through the diode 14 5 and the capacitor 15 is connected to the load (Fig. 4).

In this interval, the envelope voltage is higher than zero AC alternating current and is induced in the additional winding 5 in the r-pulsed oscillation of the secondary winding 9 (Fig. 4). - The pulsed vibrations induced in the secondary and secondary windings 9 and 5 are ridiculously depicted in the graphs of Fig. 4a and 4b, where the axis expresses time, and the ordinate axis indicates the level of the alternating voltage.

However, if additional Q of the coil 5 is performed in the same direction as the secondary winding 9, there is no need to connect the output terminal of the additional winding 5 in the opposite direction 5 to the chain diode 14 - capacitor 15 As a circuit for straightening the scanning period, several structures can be applied by combining the winding direction of the additional winding 5 and the switching on direction of the rectifier elements of the second straightening circuit connected to it. The diode circuit 14 — capacitor 15, which constitutes the second breakdown circuit, connected to the additional winding 5, is turned on so as not to be conductive in te5,

return period, and open only during the scanning period. The shape of the pulse induced in the secondary winding is shown in FIG. five,

The ratio of the leakage currents of the three windings is determined by their structural arrangement. As shown in FIG. 6, the pickup level is reduced by more than 10% compared with a conventional transformer. In this case, a decrease in the level of interference is characterized by a decrease in the amplitude of the ringing alone, without changing the shape of the high-voltage pulse. In the conductance intervals of the diode 14, the additional winding 5 is short-circuited by alternating current through a capacitor 15. When this happens, the flow of the secondary winding 9 decreases, which then explains the observed effect of a decrease in the amplitude of the ringing.

In addition to the basic structural embodiment of the transformer of FIG. 2 modifications are possible (Fig. 7-17).

FIG. 7 the number of grooves of the frame of the primary winding and the number of sections

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primary and secondary windings is 1.

FIG. 8, 10 and II, the additional partitioned winding 5 is located in the slots of the primary winding frame 2 over the latter and is separated from it by an insulating layer.

FIG. 9 the number of sections of all three windings is one.

to FIG. 2 and 13, the primary winding occupies only a part of the frame grooves, and an additional winding is wound into the remaining free grooves.

In FIG. 14, an additional winding (5 is located in the slots of the primary winding frame at one of its ends.

In FIG. 15, the additional winding is located in the slots of the primary winding frame in its middle part. 20 In FIGS. 16 and 7, the secondary winding occupies only a part of the grooves of its frame, and in the remaining free slots there is an additional winding.

25 The winding variants of FIG. 7-17, it is possible to further reduce output distortion when the load on the additional winding varies over a wide range.

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Editor H, Egorova

Compiled by A Lisov .Techred L.Oleinik

Order 2790/60 Circulation 643

VNIIPI State Committee CCCTf

on cases of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. d. 4/5

Production and printing company. Uzhgorod, st. Project, 4

Proofreader M. Maksimigaine Subscription

Claims (8)

.- one . TRANSFORMER FOR LINEAR SCHEMES OF TELEVISION TELEVISION A RECEIVER containing a ferromagnetic core, a primary winding assembled on an insulating frame, and a secondary winding placed on an insulating cylindrical frame with grooves located on top of the primary winding frame, characterized in that, in order to reduce interference, the transformer is equipped with an additional sectioned winding, a diode and a capacitor, the primary and secondary windings are also sectioned, with the additional winding located on the grooves of the frames of the primary or secondary windings, the first end is additional the body winding is grounded, and the second is connected to the first through a diode and capacitor. SU _and , 1233818 Figure 1> sn 2. Transformer according to π. 1, characterized in that the additional sectioned winding is located in the grooves of the frame of the primary winding on top of the latter and is separated from it by a dielectric layer. 3. Transformer pop. 1, characterized in that the primary winding occupies only part of the grooves of the frame, 'and an additional winding is wound into the remaining free grooves. ’ 4. Transformer according to π. 1, characterized in that part of the sections of the additional winding is located on top of the primary winding and is separated from it by an insulating layer, and the other part is located directly at the base of the free grooves of the primary winding frame. 5. The transformer according to paragraphs. 1 and 3, characterized in that the additional winding is located in the grooves of the frame of the primary winding on one: from its ends. 6. The transformer according to paragraphs. 1 and 3, characterized in that the additional winding is located in the grooves of the frame of the primary winding, in its middle part. 7. The transformer according to paragraphs. 1 and 2, characterized in that the additional winding is wound in a direction opposite to the direction of the secondary winding. 8. Transformer according to π. 1, with the fact that the secondary winding occupies only a part of the grooves of its frame, and in the remaining free grooves there is an additional winding.