DE1815434A1 - Flyback transformer - Google Patents

Description

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Diesgart-Zuf £ enhausea, 'I 8 I D 4 J

Hellmuth 'ELsth-B trass © 42

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lrflafiung concerns a flyback transformer for I? -seh @ mpfänger * especially color television receiver, with a on an even number of Harfflonis the return fundamental frequency coordinated Hboaspannungswicklinig and an auxiliary winding? whose tension a Hoohspanmangsregelsciialtung "will. ■ ·;" - · ·

The high-voltage stability is even more critical with color television receivers than with visual white receivers _s because high-voltage fluctuations in addition to changes in the picture width and picture height errors s ^ bO in the convergence position. Image sharpness and color purity can cause "

lus this Q-round the "HochspaÄnuag bei Fernsehemp £ äng @ ria kept constant with the help of an example tension regulation, the control circuit being one of the Hoölispai dependent low actual voltage can be supplied

This © actual voltage icsöüS, known to be on a high voltage dividers can be obtained with high-voltage resistors » In addition, high-voltage control devices are already included © inen Hoehspaanungstraasformator known whose core is a "■ One of the contributing factors is the load on the cathodes dependent voltage is removed "

1O ₀ 1968

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Bissinger -3.

However, these known fishing devices have the part that an actual voltage obtained in this way, from its comparison with a target voltage the. for stabilization necessary control voltage is obtained, changes in a smaller, at best the same ratio as the high voltage. That means that these control devices are only available with stronger High voltage fluctuations become effective, i.e. relatively insensitive are.

The invention therefore has the task of addressing this disadvantage avoid and use a flyback transformer with high voltage winding and to create an auxiliary winding at which an actual voltage dependent on the level of the high voltage is obtained, which changes with fluctuations in the elasticity of the picture tube proportionally more than the high voltage.

In a line transformer for a television receiver, in particular Color television receiver, with one on an odd harmonic dea? Bouncing base frequency, tuned high voltage winding and an auxiliary winding, the voltage of which is fed to a voltage control circuit, this is according to the invention achieved by the fact that the auxiliary winding is only linked to the leakage flux »-

The invention is based on the finding that the Belastungsschw'unkungen, the picture tube when located at the high-voltage diode pulse voltage due to the peak rectification stronger than the effect on the amplitude of harmonics of the fundamental frequency _f. This in turn means that a voltage induced in an auxiliary winding only linked to the leakage flux changes proportionally more strongly than the high voltage with these load fluctuations.

009827/0876

N-Bissingea? - .5

The invention is based on the drawings for example explained

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Geaass Abtoo la and Ib siad all but one se ^ ialls voEgesefeeaen air-gap-closed ferromagnetic core a PrisäswicklOiig 2 "and an Eocli ^ cutting winding 3 init the connections. 4 arranged on 5 © a Seiieuicel, ^ he from · Siisi ropes existing core ΐ-is tightly tensioned by means of two tensioning screws and nuts 5 "and a tensioning plate 6, Sine "Auxiliary winding? A with a few discoveries, the -individuals of which from the ■ depends on the required voltage, is along a yoke on a insulating pad wrapped around both legs and there fixed on some known way. This' auxiliary winding is both from the Kutzfluss, at least a 3? eil, and from the

009827/0676

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Bissinger - 3rd

Leakage flux interspersed) of the former, however, twice and in opposing respect, so that its effect is canceled out and the voltage induced in the auxiliary winding, the course of which is shown in Abis ,, 2, depends only on the leakage flux.

The insulating pad can be ordered from an insulating tape or on one, beJ & Cernschenkel encompasses every bobbin, which, with the auxiliary winding applied to it, is arranged displaceably on both legs

Fig. 3 shows the course of the high voltage winding: lying Ihpiils tension., which, as is well known, from the hochtraiisfonaiertea SüciclauxsrundS.mpuls and an odd one. In these! 'all J. harmonic eier return fundamental frequency zuc £ j.: - jr.cn; jötzt. By Abctiaamng the high-voltage winding with their strength and capacities on the 3 · harmonic the return basic frequencies ^ adäieren. The natural oscillation of the high-voltage circle is transformed upwards in this way Return basic pulse that this appears enlarged.

sor impulse is according to KbI). 4, a conventional circuit of a flyback transformer ^ displayed; rectified "i at a high-voltage diode 10 by _{Spitzengleichrlchitung?"} And supplied to the ge ~ v.-oznene DC voltage of the picture tube.

Likewise, the voltage induced in the auxiliary winding 7, c.ie: rar- depends on the leakage flux and the course of which corresponds to the 3- har-; .. o: -is ropes of the return frequency, rectified and smoothed and : then fed to a Heg el circuit as an actual value. .

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For example, the load on the picture tube, for example If the beam current is icdulated, its high voltage drops, beispiolsv; ice from IJ, on XL · ,. This affects

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INSPECTED

N.Bissinger - 3 "

Way, "for example by means of a so-called p Η coil in connection with a compensation winding. They kaxin but also vargenommea by changing the air gap by vorgosehonen in an outside of the coils Air gap of the Perromagnetlcents a perpendicular to Leg axis bex-zegliclier S'erritstift is arranged, for example in an air gap interlayer atts plastic.

3 claims "

'2 sheets of drawings.

■ Όθ'0β27 / Ο876

Claims (1)

Bissinger 181543Λ special © ife one 3? ems@1a.//mp €äugzte: · ?, ins = e: mselb, esTD he intercepts _s with one on a un li © der · Eüelslaufgrandfr-aqnens that St. from is concatenated with äe® St ^ eiafluss acli ii X, Scherύ-ίsi lclsölt is z ¹ after, ikn ^ ruch I, isiss "die spi ^ alg ^ iia» ira D ^ üskrex ^ aiiren z'x * an insulating plate attached to the Joeiies " r &eM; £ ia.d 009827/0876