KR820001956B1 - Fly-backtransformer with a low ringing ratio - Google Patents

Abstract

The fly-back transformer for use in a horizontal deflection circuit of a television receiver comprises a core member(11), a coil bobbin (12) and a primary winding (14) for low voltage supply mounted on the coil bobbin. A second coil bobbin is provided on the first coil bobbin with a secondary winding(19) for high voltage. A tertiary winding(15) is used to serve as a secondary power source, and to provide an output signal. A commutating circuit is connected with the tertiary winding to commutate the output of the tertiary winding during the scanning period of the horizontal deflection circuit.

Description

Flyback Transformer for Horizontal Deflection Circuit of Television Receiver

1 is a diagram showing an induction-pulse one waveform of a secondary winding for explaining the ringing ratio of a flyback transformer in a diagram;

2 is a cross-sectional view showing an important part of one flyback transformer of the configuration of the present invention.

3 is an installation circuit diagram for illustrating the effect of the flyback transformer of FIG.

4 (a) and 4 (b) show charts of pulse waveforms to illustrate rectification between syringes, (a) shows induction waveforms of secondary windings, and (b) shows induction of tertiary windings. Drawing showing a waveform.

5 (a) to 5 (d) are charts showing the induction waveform of the secondary winding of the flyback transformer in the installation circuit diagram of FIG. 4, and (a) is the induction waveform of the flyback transformer of FIG. (B) shows the induction waveform of the conventional configuration, (c) and (d) shows the induction waveform to illustrate the operation of the tertiary winding, respectively.

6 is a graph showing the relationship between the ringing ratio (R) and the leakage magnetic flux (F) of the secondary winding obtained with the flyback transformer of FIG.

7 to 20 degrees are cross-sectional views of important parts showing other configurations of the flyback transformer according to the present invention.

21 is an installation circuit diagram for showing the operating effect of the flyback transformer of FIG.

22 and 23 are cross-sectional views of important parts showing other components of the flyback transformer according to the present invention.

FIG. 24 is an installation circuit diagram for explaining the actuation effect of the flyback transformer of FIG.

(A) to (f) of FIG. 25 are charts showing the induction waveform of the secondary pipe of the flyback transformer shown in the installation circuit diagram of FIG. 24, and (a) to (c) to induction of the flyback transformer of FIG. (D) to (f) show induction waveforms of conventional configuration.

26 to 30 degrees are cross-sectional views of each of the important parts showing other configurations of the flyback transformer according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flyback transformer used to supply direct current high voltage to a cathode ray tube such as a television receiver. More specifically, it relates to an improved flyback transformer to reduce the ringing ratio.

Generally, a flyback transformer includes a primary winding as an input winding, a secondary winding as a high voltage output winding, a signal such as AFC and AGC, and a tertiary winding for obtaining a secondary power supply. In particular, the primary and tertiary windings are closely coupled to each other.

으로 표시된다. 재래식 변압기에서는 누설 인덕턴스의 공진회로(resonance)와 이차권선의 부유용량(Stray capacity)을 링깅비율이 적어지도로 적절히 동조시키는 것이 수단의 하나였었다. 그러나, 위에서 설명한 재래식 방법에서는 링깅과 셧트펄수가 서로간에 관련하여 변화하기 때문에 조정하기가 극히 어렵게 되었다.Flyback transformers configured as described above require a lower ringing ratio for efficient operation. As shown in FIG. 1 illustrating high voltage pulses induced at the secondary side of the flyback transformer when Fifth tuning is taken, the ringing ratio represented by Rr is the first peak height of ringing (B). ) And the ratio of the ringing wave peak (B) to the shot pulse wave peak plus the value (A). That is, the numerical value of the ringing ratio Rr is

Is displayed. In conventional transformers, one of the means was to properly tune the resonance circuit of the leakage inductance and the stray capacity of the secondary winding with a low ringing ratio. However, in the conventional method described above, it becomes extremely difficult to adjust because the ringing and shutt pulse numbers change in relation to each other.

Moreover, even if the shut pulse crest value was made smaller than the constant value of the ring ging crest value, the ringing ratio improvement was automatically limited.

One of the main objectives of the present invention is to provide an improved flyback transformer which is used to supply the high pressure of the tube of a tube such as a television receiver and which can easily adjust the ringing ratio, which is higher than that of the conventional flyback transformer. To do less.

Another important object of the present invention is to provide a flyback transformer of the type described above, which is calculated to have a low crest value of ringing irrespective of the shuttling pulse.

It is a third object of the present invention to provide an improved flyback transformer in which the shut pulse waveform induced in the secondary winding is not disturbed even when the tertiary winding is overloaded.

It is still another object of the present invention to provide an improved flyback transformer capable of producing a low cost because of its stable function and simple structure.

According to an expression selected by the present invention in achieving these and other objects, the flyback transformer provided by the present invention is used in a horizontal deflection circuit of a television receiver and is configured as follows.

Core member, primary coil bobbin on electrically loaded core member, primary winding for low pressure supply on primary coil bobbin, secondary coil bobbin on primary coil bobbin, primary secondary bobbin The magnetic coupling of at least one part of the tertiary winding to the secondary winding, tertiary winding or primary winding for the high voltage supply above is relatively small compared to the magnetic coupling of the secondary winding, and the leakage of the secondary winding in the primary winding. The magnetic flux is a commutating circuit connected to the tertiary winding, which is positioned to bridge with the tertiary winding, or a part thereof, and to the electrical tertiary winding that regulates the output of the electrical tertiary winding during the scanning period of the horizontal deflection circuit. It is composed.

Another configuration of the present invention is that the tertiary winding of the flyback transformer is separately attached to two positions. In one position the magnetic coupling to the primary winding is close and in the other position the magnetic coupling is weakened in relation to the primary winding and weakened, and the tertiary winding is the leakage flux and the linkage of the secondary winding to the primary winding. The tertiary winding is operated to rectify during the syringe in the deflection circuit.

The above essential concept of the present invention also applies to a so-called multi singular type flyback transformer including a secondary winding divided into a plurality of parts alternately connected to a plurality of diodes.

Before proceeding with the description of the present invention, it is noted that the same parts are denoted by the same numerals for the entire plural drawings. Referring now to the drawings, FIG. 2 shows one major part of a flyback transformer according to one configuration of the present invention. Into the outer periphery of the rod-shaped Ferrite core 11, a low coupling coil bobbin 12 formed of a dielectric material is inserted into the core 1l. A plurality of circular channels 13 are laid out, and each channel 13 is divided into a coil-shaped primary winding 14 wound in a straight line, and a plastic film plate for weak coupling with the primary winding 14. In accordance with the outer periphery of the coil-shaped tertiary winding 15 and its low voltage coil bobbin 12, which are divided in the margin of the channel 13 on the primary winding 14 via the same thick dielectric material 16, As shown in the circuit diagram of FIG. 3, the coil-shaped secondary windings 19 and the like wound on the respective channels 18 of the high-pressure coil bobbin 17 formed and installed with dielectric materials are respectively primary and secondary. And connected horizontal deflection circuits (HD) and primary rectifiers of the tertiary windings (14) (19) and (15). An electrical circuit in one set containing (FR) and a secondary rectifier circuit (SR).

One end of the primary winding 14 is connected to the horizontal deflection circuit HD of the television receiver, and the other end is connected to the + terminal of the primary power source B in a known manner, but the length of the coil winding is the secondary winding 19 and the tertiary. It has a medium length of the winding 15.

The secondary winding 19 has one of the longest coil windings, one end of which is connected to the primary rectifying circuit HD and the other end of which is frozen in a known manner.

The tertiary winding 15 has one end connected to a load L for drawing an output signal through the secondary rectifier circuit SR, and the other end has the smallest length of coil winding connected to earth. The magnetic coupling of the tertiary winding 15 to the winding 14 is substantially reduced compared to the secondary winding 19, and the leakage flux of the secondary winding 19 to the primary winding 14 is reduced in the horizontal deflection circuit ( HD) is attached to a position connected with the tertiary winding 15 to be acted by the secondary rectifying circuit (SR) so as to be rectified during the syringe.

The tertiary winding 15 is wound around the tertiary winding 15 and the primary winding 14 by a thick insulating material on the outer circumferential surface of the primary winding 14 so as to have a weak coupling with the primary winding 14, and a horizontal deflection circuit ( The winding direction of the secondary winding 19 may be reversely wound so that the rectification is made only during the injection period of the HD).

The tertiary winding 15 permits the so-called investigation period rectification that will take place between the syringes when it is connected to the load L through the secondary rectifying circuit SR during the curved portion of the pulse waveform of FIG. 4 (b). The load L is arranged above the AC O level, and the pulse waveform of the tertiary winding 15 is shown as the pulse waveform of the secondary winding 19 as shown in FIG. Guided to winding 15.

The pulse waveforms induced in the secondary and tertiary windings (19) and (15) are shown graphically in the graphs of Figures 4 (a) and (b), respectively, indicating the time in abscissa and the AC O level. It is the ordinate.

However, although the winding direction of the tertiary winding 15 becomes the same as that of the secondary winding 19, the output shaft terminal of the tertiary winding 15 connected in the opposite direction to the secondary rectifying circuit SR is the tertiary associated with the secondary winding 19. It is essentially the same as the reverse winding of the winding 15.

As a circuit for causing the syringe to commutate, several structures can be used as a combination of the winding direction to the tertiary winding 15 and the connection direction of the rectifying element of the secondary rectifying circuit SR connected thereto.

In summary, the secondary rectifier circuit SR may not conduct a rectifying element such as a diode constituting the secondary rectifier circuit SR connected to the tertiary winding 15 during the flyback period, but only between the syringes. It is necessary to assemble it as possible.

The secondary winding 19 is formed to cover the primary winding 14 and the tertiary winding 15, and is located closer to the tertiary winding 15 than the primary winding 14.

The flyback transformer of the present invention is basically assembled as described above and its characteristics are weak magnetic coupling with the primary winding 14 and the leakage of the secondary winding 19 in relation to the primary winding 14 is caused by the tertiary winding 15. The magnetic flux is connected, and the load L is connected to the tertiary winding 15 via the secondary rectifying circuit SR, and the tertiary winding 15 is formed at the position where the rectification between the syringes is used in the rectifying circuit.

More specifically, the tertiary winding 15 is formed where the ratio between the leakage fluxes of both the primary and tertiary windings 14 and 15 or simply the secondary winding 19 affected by the primary winding 14 is 90% or less. In the drawing, the ringing ratio R of the secondary winding 19 is improved by 10% or more as compared to the conventional flyback transformer as described later.

In addition, the flyback transformer of the above-described configuration connects the output line of each winding to the terminal pin (not shown) of the terminal formed of the low voltage coil bobbin 12 except for the high voltage output terminal of the secondary winding 19. Insulation coating was applied to each winding with a resin molding.

As described above, the flyback transformer of the present invention has a horizontal deflection circuit HD connected to the side of the primary winding 14 and a primary rectifying circuit FR and a secondary rectifying circuit SR horizontal to the secondary winding 19 side. The secondary rectifier circuit SR is connected to the tertiary winding 15 side so as to be rectified only during the syringe of the deflection circuit HD.

By applying a square wave pulse signal of 15.75 KWz to the input shaft of the horizontal output transistor Tr of the primary axis of the circuit configured as described above, a load L such as the secondary power supply B is connected to the tertiary winding 15 so that error tuning is performed. When the pulse wave induced in the secondary winding 19 was observed with an oscilloscope, a waveform was obtained as shown in FIG. 5 (a), and the ringing ratio (R ₁ ) obtained from this waveform was 11.0%. to be.

Compared with the conventional flyback transformer of the present invention, the third winding 15 of FIG. 2 is removed from the insulating material 13 to be wound directly on the primary winding 14 to induce the pulse waveform induced in the secondary winding 19. Observation with an oscilloscope resulted in a waveform as shown in FIG. 5 (b), and the ringing ratio (R ₂ ) obtained from this waveform was 16.5%.

As can be seen from the above description, the flyback transformer of the present invention has further improved ringing ratio as compared to conventional transformers.

A significant improvement in the ringing ratio as described above results in a lower ringing amplitude without any change in the shot pulse waveform, as can be clearly seen by comparing the waveforms between Figs. 5 (a) and 5 (b). will be.

The reason why only the ringing waveform is changed without changing the shut pulse waveform is as follows. That is, the rectifying method of the secondary rectifying circuit SR of the tertiary winding 15 according to the present invention is the syringe-to-syring rectification.

On the other hand, since the load L is connected to the tertiary winding 15, the tertiary winding 15 may be used only between syringes. In other words, condensate C ₁ in the secondary rectifying circuit SR may be limited to a period during which ringing occurs. ) Is in a short circuit state via AC.

Since the tertiary winding 15 acting as described above is disposed in close proximity to the secondary winding 19, the leakage flux of the secondary winding 19 with respect to the primary winding 14 inevitably occurring is caused by the tertiary winding 15. You will be overworked.

By the way, since the tertiary winding 15 is short-circuited by the AC type only between the syringes as described above, the secondary winding 15 inevitably flows to the secondary winding 19 by flowing a current negligible for the intermittent magnetic flux only between the syringes. It is to substantially reduce the leakage magnetic flux generated only between the syringes.

On the other hand, the ringing frequency between the syringes is the resonant frequency of the resonant circuit in which the leakage inductance L 1 and the floating capacity Cs (fIoating quantity) of the secondary winding 19 are connected in series.

로서 결정되고, 이차권선(19)의 누설자속은 앞서 말한바와 같이 감소되어 공진주파수 즉, 링깅 주파수가 더 높게 되는 것이다.As is well known, this frequency

The leakage magnetic flux of the secondary winding 19 is reduced as described above, so that the resonance frequency, that is, the ringing frequency is higher.

As described above, since the tertiary winding 15 is short-circuited by an AC type only between syringes, the ringing amplitude can be reduced without any effect on the shut pulse waveform.

In order to prove the function of the tertiary winding 15 through experiments, the waveforms of FIGS. 5A and 5B are removed from the load L of the tertiary winding 15 of the flyback transformer, respectively, and the secondary winding ( As a result of observing the waveform induced in 19), Figs. 5 (c) and 5 (d) ((c) correspond to (a) and (d) correspond to (b)).

As apparent from these figures, when the load of the tertiary winding 15 is removed, the waveform induced in the secondary winding 19 has the same shape, and the ringing ratios R ₃ and R ₄ are 16.0% and 17.0%, which are largely different. There is no.

However, when the load L is applied to each of the tertiary windings 15, the ringing ratios R _{1 and} R ₂ are 11.0% and 16.5% as described above.

The present invention can be seen that the conventional transformer is hardly changed while the flyback transformer is improved by about 30% in the above embodiment.

The operation of the tertiary winding 15 can be clearly understood from the above description.

In addition, other experiments related to the ringing ratio value R and the leakage magnetic flux F of the secondary winding 19 were carried out with the results as shown in the graph of FIG.

The abscissa of the graph represents the ratio of F ₁ / F ₂ between the leakage flux of the primary and tertiary windings 14, 15, or the secondary winding 19 affected only by the primary winding 14, and the ordinate represents the primary And the improvement efficiency of Ro / Rr between the tertiary winding 14/15 or the ringing ratio value of the secondary winding 19 affected only by the primary winding 14.

In this graph, F ₁ is a secondary winding in a state in which primary and tertiary windings 14 and 15 are shorted, that is, in a state in which a load L connected to a tertiary winding 15 via a diode D ₁ is shorted. It is the inductance measured by (19).

F ₂ is an inductance measured by the secondary winding 19 in a state in which only the primary winding 14 is shorted, that is, in a state in which there is no tertiary winding 15.

Ro is also the ringing ratio between the ringing crest and the sum of the short pulse creep values of the secondary winding 19 which are affected by the primary winding 14.

And Rr is the ringing ratio between the sum of the short wave- cocoons and the ringing crest of the secondary winding 19, which is affected by both the secondary and tertiary windings 14,15.

Therefore, the ratio of F ₁ / F ₂ refers to the degree of leakage magnetic flux to be discharged from the tertiary winding 15 to the secondary winding 19. And the ratio of Ro / Rr represents a range of improvement of the ringing ratio due to the presence of the tertiary winding (15).

The graph in FIG. 6 is an approximate curve of the entry with a pair of bend points that sum up about 90% and 70% of the ratio of F ₁ / F ₂ . When the ratio of F ₁ / F ₂ is less than 90%, the ratio of Ro / Rr is improved by more than 10%, and thus unnecessary light emission and raster ringing of the television receiver are greatly reduced, thus eliminating filters and the like. Did.

Configuration and operation of the flyback transformer of the present invention has been described above in the text.

However, the flyback transformer (structural) of the present invention is not limited to the flyback transformer of FIG. 2 showing the basic configuration of the present invention.

The windings 14, 15, and 19 of FIG. 2 are all divided into channels l3 and 18 of the bobbins 12 and 17, and have the same divided shape, but the windings 14, All or any of (15) and (19) can be configured as a flat layer type with multiple solenoid windings as indicated in FIGS. 7, 8 and 9 .

The flyback transformer of FIG. 7 has a cylindrical low pressure coil bobbin 12 ₁ without a channel and a flat-pattern primary winding 14 ₁ formed in the bobbin 12 ₁ and a cylindrical thick insulating plate 16 ₁ . It has a flat winding tertiary winding (15 ₁ ) formed of the primary winding through the.

The flyback transformer of FIG. 8 has a cylindrical high pressure coil bobbin 17 ₁ having no channel and a flat winding secondary winding 19 ₁ formed in the bobbin 17 ₁ .

The flyback transformer of FIG. 9 comprises the components 12 ₁ , 14 ₁ , 15 ₁ , 16 ₁ , 17 ₁ and 19 _{1 in} FIGS. 7 and 8 as mentioned above. It is.

Since the tertiary winding 14 is formed in the same manner as the position of FIG. 2, the effect of FIG. 2 may be shown in all of the configurations of FIGS. 7, 8, and 9.

According to the flyback transformer of FIG. 10, at least a part of the tertiary winding 15 is dispersed while being closely coupled with the primary winding 14, and has a structure connected in series.

In this case, the remaining portion of the tertiary winding 15 is weakly coupled with the primary winding 14 and the leakage flux of the secondary winding with respect to the primary winding 14 as shown in the configuration of FIG. It is in the position to connect.

In other words, the tertiary winding 15 has two parts, that is, a portion wound directly on the primary winding 14 to be closely coupled with the primary winding 14, and the primary winding to weaken the primary winding 14. In (14), it is divided into an indirect winding through a thick insulating material.

The two types of windings were divided into five to three ratios.

As a result of observing the pulse waveform induced by the secondary winding 19 of this configuration with an oscilloscope, a waveform like that of FIG. 5 (a) was obtained, and the ringing ratio R obtained from the waveform was 12.5%.

Various studies related to the characteristics of the flyback transformer are evident that the current flowing through the tertiary winding 15 becomes higher as the load L increases, so that the inclination of the right side portion of the flyback transformer is applied to the secondary winding 19. It occurs within the shut pulse waveform between the induced waveforms and therefore adversely affects the adjustment of the high voltage.

The configuration of the present invention is to provide a flyback transformer that does not allow deformation occurring in the shut pulse waveform induced in the secondary winding 19 even when the load L is large in the tertiary winding.

In this configuration, the dispersion ratio between the tertiary winding 15 approaching the secondary winding 19 and the tertiary winding 15 approaching the primary winding 14 may be appropriately made with the characteristics of the optimal operation with respect to the structure of the flyback transformer. It is necessary to select so that.

When the tertiary winding 15 is provided in a distributed manner as described above, the high pressure adjustment may be superior so as not to be reduced even when the load L connected to the tertiary winding 15 is large.

It should be noted that the ringing ratio R is determined by the ratio of the tertiary winding 15 close to the primary winding 14 and the tertiary winding 15 close to the secondary winding 19 or the tertiary winding close to the secondary winding 19. It can be properly adjusted by the binding degree of the secondary winding 19 with (15).

In practice, the idea of ringing ratio (R) was balanced with other features of the flyback transformer.

And there are various configurations regarding the winding position of the tertiary winding 15 wound near the secondary winding 19.

For example, referring to FIG. 11, a portion of the tertiary winding 15 may have one side channel 18 of the high voltage coil bobbin 17 in which the tertiary winding I5 is wound around the channel 18 in a portion adjacent to the secondary winding 19. Wound on) Referring to FIG. 12, the winding channels 13 ₁ on one side of the low pressure coil bobbin 12 are positioned on the upper side of the low voltage coil bobbin 12 and wound around the secondary winding 19. Without this, the base is divided and wound up in the upper channel 13 ₁ . These may vary in either degree, but may have a lower ringing ratio (R) for the same reasons as in FIG. Also described is the winding of each winding in each of the above configurations.

The individual windings are not limited to winding, but suitable windings such as solenoid windings can be adapted.

Furthermore, it is possible to arrange the tertiary winding 15 as close to the low potential side of the secondary winding 19 as possible at the limit of the withstand voltage. In short, the flyback transformer of the present invention has the coupling with the primary winding 14 where the coupling of the tertiary winding 15 for drawing the secondary power source B is closely coupled with that of the primary winding 14. 14) It is good to make the current method of this tertiary winding 15 commutate between syringes, while it is wound and divided into two places with the leakage left of the secondary winding 19 and the linking position. The configuration may be other than the above-described exception.

The tertiary winding 15 according to the above configuration is used to obtain signals such as AFC, AGC, etc. in addition to drawing the secondary power source B. The tertiary windings 15 can also be used to improve the ringing ratio R as described above.

The tertiary windings 15 of the flyback transformer are used to draw signals such as AFC, AGC, etc. to external electrical circuits, and loads of impedance elements such as secondary rectifier circuits connected to the tertiary winding 15 and resistors connected to the secondary circuits (L). ) Can be integrated into the flyback transformer.

Since the ringing ratio R is woven substantially in balance with the other properties of the flyback transformer, according to the flyback transformer as seen in FIGS. 13 to 19, the tertiary winding 15 is parallel to the primary winding 14. It is formed directly on one channel 13 of the low pressure coil bobbin 12 without an insulating material.

The secondary winding 19 is formed to cover both the primary winding 14 and the tertiary winding 15.

In this configuration, the tertiary winding 15 is preferably wound around the low potential side of the secondary winding 19 in consideration of the voltage.

According to the flyback transformer shown in FIG. 14, the channel 13 ₁ , on which the tertiary winding 15 of FIG. 13 is wound, has a tertiary winding to improve the linkage of the leakage flux of the secondary winding 19 whose upper side is located at the top thereof. 15) was approached by a secondary winding 19.

According to FIG. 15, the tertiary winding 15 shown in FIG. 13 is distributed so that both sides of the secondary winding 19 may be evenly wound.

According to FIG. 16, the winding channel 13 ₁ in which the tertiary winding 15 is wound in FIG. 15 is positioned at an upper end thereof so as to approach the tertiary winding 15 to the secondary winding 19.

The channel 13 ₁ in the middle of the low voltage coil bobbin 12 according to the flyback transformer shown in FIG. 17 forms a tertiary winding 15 therein, the bottom side of which is located at the top.

The tertiary winding 15 according to the flyback transformer shown in FIG. 18 is formed on one side of the channel 18 corresponding to the low potential side of the high voltage coil bobbin 17.

A tertiary winding 15 according to the flyback transformer shown in FIG. 19 is formed in parallel to the secondary winding 19 in the winding channel 18 at both ends of the high pressure coil bobbin I7.

The ringing ratio can be made small due to reasons such as those of FIG. 2 although there are some differences between the above configurations.

According to the flyback transformer shown in FIG. 20, at least a portion of the tertiary winding 15 is weakened at the end of the primary winding 14 with the primary winding 14 and the tertiary winding 15 is connected to the primary winding 14. ) Is wound in a position connecting the leakage magnetic flux of the secondary winding (19).

The tertiary winding 15 is then used to rectify during the syringe. A pair of tertiary windings 15 are wound via a thick insulating material 16, such as a resin film, to weaken the coupling of the primary windings 14 and to access the secondary windings 19, as shown in FIG. Each is connected in series.

The winding direction of the tertiary winding 15 can be arbitrarily used as long as the tertiary winding 15 is used for the so-called syringe-to-syring rectification.

The pulse waveform induced in the secondary winding 19 of this configuration can be observed by the above-described method, and the ringing ratio value R obtained from the waveform is 11.5%.

In addition, in the above configuration, each of the tertiary windings 15 has been described as being distributed and wound, but is not limited thereto. Not only can it be applied to suitable windings such as solenoid windings, but also at least one part of the tertiary winding 15 is weakly coupled with the primary winding 14 and the leakage flux of the secondary winding 19 in relation to the primary winding 14 is reduced. It is disposed in the position to connect, and the remaining portion of the tertiary winding 15 can be wound and distributed so that the connection with the primary winding 14 is close, and can be connected in series with one portion as shown in FIG.

If the tertiary windings 15 are arranged to be closely and weakened in engagement with the primary winding 14, high voltage regu1ation is not reduced, even if the load power connected to the tertiary winding 15 is large. Can be done.

All the tertiary windings 15 are in a position where the coupling with the primary winding 14 is weakened, and the right shoulder when the tertiary winding 15 connects the leakage flux of the secondary winding 19 with respect to the primary winding 14. Downward distortion in the negative will occur in the shut pulse waveform in the induction waveform of the secondary winding 19 when the current flowing through the tertiary winding 15 is increased to a larger load power, and adversely affect the high voltage regulation. Crazy

When the tertiary winding 15 is distributed such that the coupling with the primary winding 14 becomes stronger, as shown in FIG. 22, such a shut pulse waveform deformation does not occur even if the load power is large.

In addition, the tertiary winding 15 of the flyback transformer of the present invention is placed at both ends of the primary winding 14 or the secondary winding 19 where the leakage magnetic flux of the secondary winding 19 is the highest with respect to the primary winding 14. .

However, when the tertiary windings 15 at both ends are connected in series as described in the configuration of FIG. 20, the tertiary winding 15 is connected to the primary winding 14 except for the end where the tertiary winding 15 is placed. When wound several times, the leakage magnetic flux of the secondary winding 19 is adjusted to be interconnected except for the tip where the leakage magnetic flux of the secondary winding 19 is the highest.

In this way a more effective method was established. In addition, the tertiary windings 15 placed at both ends of the secondary winding 19 are not inevitable to use through a series connection. Each load is connected to each tertiary winding 15 through an individual rectifier circuit.

The tertiary windings 15 may be used independently, or the tertiary windings 15 placed at the ends of the secondary windings 19 may also be used through parallel connection. In short, the tertiary windings 15 need to be used to allow rectification during the scanning period.

In addition, the load connected to the tertiary winding 15 through the rectifying circuit may be an external electric circuit or only an inductance element such as a simple resistor.

The load to which the tertiary winding 15 is connected may be used to improve the ringing ratio instead of terminating the secondary power source B as in the case of the tertiary winding 15 such as an inductance element.

According to the present invention, there is a multi-single type flyback transformer having the following characteristics.

Its characteristic is that at least one portion of the tertiary winding 15 connects at least one leakage flux of the secondary winding 19 in which the tertiary winding 15 is AC separated with respect to the primary winding 14 and the primary winding 14 and The coupling of the tertiary winding 15 is wound to a weakening position, and the tertiary winding 15 is commutated during the syringe period.

The flyback transformer in this configuration consists of: Primary windings which are split along three channels 13 of the low pressure coil bobbin 12 in relation to the core 11 of the low pressure coil bobbin 12 having a plurality of winding channels 13 therein and divided into three for alignment. (14) weaken coupling with the primary windings 14 of the plurality of tertiary windings 15 wound at one end of each divided primary winding 14 and connected in equilibrium to draw the secondary power source B; A high pressure coil having a plurality of winding channels 18 therein, with a high pressure coil bobbin 17 in opposition to the low pressure coil bobbins 12 of the same tertiary windings 15 via a thick insulating material 16 to access (19). The secondary windings 19 which are wound around the bobbin 17 and the winding channel 18 of the high-pressure coil bobbin 17 and are divided into three for winding work, the primary winding 14 divided into three, and the tertiary Secondary windings formed covering the windings 15, alternately with the secondary winding 19 line Alternatively, the plurality of diodes D ₂ arranged in the winding channel 18 of the high voltage coil bobbin 17 connected in series divide the secondary windings 19 by AC, respectively, and the sound absorption side of the diodes D ₂ is obtained. It is adjusted to derive the DC high voltage from the.

The tertiary windings 15 are used so that so-called inter-syringe rectification can be achieved, where the rectification is only during the inter-syringe when the load L is connected via the secondary rectifier circuit SR. Various circuits may be provided as circuits for causing rectification between syringes by the winding direction of each of the tertiary windings 15 and the connection direction of the rectifier elements outside the rectifier circuit connected thereto. In summary, it is necessary that the rectifying elements such as diodes constituting the rectifying circuits connected to the tertiary windings 15 cannot be conducted during the flyback period, but only during the syringe period.

As shown in the circuit diagram of FIG. 24, the horizontal deflection circuit HD is connected to the primary winding 14 of the flyback transformer of the present invention.

Condensate (C ₂ ) is connected to the secondary winding (19) side.

The secondary rectifier circuit SR is connected to the tertiary winding 15 side connected in parallel with each other.

As described above, the respective tertiary windings 15 are connected so that the rectifier circuit is rectified between syringes.

The square wave pulse signal of 15.75 KHz is applied to the inlet side of the primary side horizontal output transistor Tr having the circuit structure as described above.

The load L is connected to the tertiary windings 15.

When the fifth tuning was applied to the two secondary windings 19 and the seventh tuning was to the other secondary winding 19, the pulse waveforms induced in these three secondary windings 19 were observed as an oscilloscope.

As a result the waveforms as shown in Figs. 25 (a) (b) and (c) corresponding to the three secondary windings 19, respectively, are shown. Ringing ratio values (R) obtained from these waveforms are 12.5%, 9.5%, and 12.0%, respectively.

The flyback transformer of the present invention removes the insulating material 16 and removes the primary winding 14 from the tertiary windings 15 in FIG. It was wound directly on, and another structure was made exactly the same as the structure in FIG.

The pulse waveform induced in the secondary winding was observed in the manner described above.

As a result, the waveform as shown in Figs. 25 (d) (e) and (f) is shown.

Ringing ratios (R) obtained from the waveforms are 27.0%, 20.5%, and 19.5%.

As can be seen from the above description, the flyback transformer of the present invention has much improved ringing ratio (R) compared to conventional transformers.

In the observation of the above waveforms, the 5th and 7th hybrid tuning was performed on the secondary winding to improve the output waveform on the secondary side to improve the efficiency of the flyback transformer.

Needless to say, however, hybrid tuning is not limited to the 5th and 7th associations and can be applied to the appropriate associations as needed.

The significant improvement in the ringing ratio described above is the reduction of the ringing amplitude without a change in the shut pulse waveform, as evident in the comparison of the waveforms between Figures 25 (a) (b) (c) and 25 (d) (e (f)). It was done alone.

Small ringing amplitudes occur at higher frequencies.

The reasons why only the ringing waveform changes without changing the shutter pulse waveform are as follows.

That is, the rectifier circuit of the tertiary windings 15 employs inter-syringe rectification and the load L is connected to the tertiary winding 15. In this way, the tertiary winding 15 is placed in a state in which a short circuit is provided in an AC manner through the condensate C ₁ of the rectifier circuit only between the syringes, i.

Since the tertiary windings 15 acting as described above are arranged in close proximity to the secondary windings 19, the leakage flux inevitably generated in each of the secondary windings 19 to which the primary winding 14 is associated is the tertiary winding 15. They are tailored to interconnect.

However, since the tertiary windings 15 are short-circuited AC only during the syringe, as mentioned above, the current that interrupts the interconnected magnetic flux is such that the leakage flux inevitably generated in the secondary winding 19 is significantly reduced between the syringes only. Only the syringe flows through the tertiary windings (15).

On the other hand, each secondary winding ringing frequency between the syringes is a resonance frequency of a resonant circuit in which the leakage inductance L and the stray capacitance Cs of each of the secondary windings 19 are connected in series.

로 정해지며, 이리하여 각각의 이차 권선의 누설자속은 공진주파수 즉, 링깅주파수로 높게 하도록 앞서 설명한 바와 같이 감소된다. 위에서 설명한대로 삼차권선(15)은 주사기간 동안에만 AC식으로 단락을 하고 셧트펄스 파형에는 영향을 미치지 않는다. 이리하여 링깅진폭을 더 적게 할수 있다.As is well known

Thus, the leakage flux of each secondary winding is reduced as described above so as to increase the resonance frequency, that is, the ringing frequency. As described above, the tertiary winding 15 short-circuits AC type only during the interval between syringes and does not affect the shut pulse waveform. This allows for less ringing amplitude.

The flyback transformers of FIGS. 26 to 30 are more practical because the ringing ratio is substantially balanced with other features of the flyback transformer.

Among them, Figs. 26 to 28 are superior in effect to the structure of Fig. 23.

According to the flyback transformer example shown in FIG. 26, the tertiary windings 15 do not have an insulating material 16 and have a primary winding at a channel 13 at one end of each divided primary winding 14 of the low voltage coil bobbin 12. 14) are formed in parallel.

The secondary windings 19 are formed to cover the primary winding 14 and the tertiary winding 15, respectively.

In this case, it is preferable to wind to the lower potential side.

According to the flyback transformer shown in FIG. 27, the channels 13 in which the tertiary windings 15 are wound in FIG. 26 are located at the top of their bottoms, thereby approaching the tertiary windings 15 to the secondary winding 19, and It is intended to improve the interconnection of secondary windings. According to FIG. 27, only the low potential side of each of the primary windings 14 divided in FIG. 27 is aligned so that the same tertiary winding can be evenly wound on the high potential side of each of the primary windings 14 which are respectively divided. As shown in FIG. 28, the structure in which the tertiary windings 15 are wound on the low potential side and the high potential side of the divided primary winding 14 can be adapted to the above-described FIG.

According to FIG. 29, the winding channels 13 in the middle of each of the divided primary windings 14 of the low pressure coil bobbin 12 are located at the upper end of the winding channels 13, and the third windings 15 are formed therein. It is.

According to FIG. 30, the tertiary windings 15 are formed at one end of the winding channel 18 on the low potential side of each of the secondary windings 19 of the high voltage coil bobbin 17, respectively.

The ringing ratio may be less, for some reasons as in FIG. 23, although there may be some differences in some cases.

In the above configurations, the tertiary windings 15 are provided in numbers corresponding to the secondary windings 19 divided by AC. The tertiary winding 15 is not necessarily provided with the number of divided secondary windings.

For example, the tertiary winding of the above features may be provided corresponding to only one secondary winding 19.

Needless to say in this configuration, the tertiary winding 15 to the secondary winding 19 having the largest distributed capacity in relation to the earth potential, ie the secondary winding 19 having the largest ringing amplitude. It is most effective to come up with

In this configuration, the secondary winding 19 that is not provided with the tertiary winding 15 having the above characteristics does not improve the ringing ratio R.

The number of remaining secondary windings 19 interfering with each other in a flyback transformer having a plurality of secondary windings 19 divided in AC manner, such as the multi-single type, may indicate that only one secondary winding has improved ringing ratio (R). When correspondingly reduced.

Thus, improvement can be easily achieved through the adjustment means of the ringing ratio R by the conventional tuning system, and the ringing ratio R of the entire flyback transformer can be made sufficiently smaller than before. In addition, when the tertiary winding 15 is provided in correspondence with only one secondary winding 19 as described above, the tertiary winding 15 may be distributed and wound so that the coupling with the primary winding 19 is stronger as in the conventional case. All tertiary windings 15 may be connected in series. However, in relation to the primary winding 14, they are not provided where they are interconnected with the leakage magnetic flux of the secondary winding 19 and the coupling with the primary winding 14 is weakened. When one of the tertiary windings 15 is scattered, the high pressure adjustment can be made superior without being reduced even when the load L connected to the tertiary winding 15 is large. The structure in which the tertiary winding 15 is scattered can be applied to all tertiary windings 15 even if the tertiary winding 15 is provided in a number corresponding to each of the secondary windings 19. In addition, when the tertiary windings 15 are provided in plural as shown in FIG. 21, they are connected in parallel in this configuration.

Each tertiary winding 15 may be used alone or all tertiary windings 15 may be used in series.

In summary, each of the tertiary windings 15 is intended to be used to commutate during the syringe.

And considering the original purpose of the tertiary winding 15 for the load (L) connected to the tertiary winding 15 through the secondary rectifying circuit to draw the secondary power source B, an impedance element such as a simple resistor as well as an external electric circuit. Can also be in. Even though the impedance elements of the load L connected to the tertiary winding 15 are the same, the tertiary winding 15 can also be used to improve the ringing ratio or draw the secondary power source B.

When the tertiary winding is used only to improve the ringing ratio without drawing secondary (B) power flowing into the external electrical circuit, the rectifier circuit (SR) and impedance element load (L) connected to the tertiary winding (15) are connected to the flyback transformer. It can also be integrated.

Various configurations of the flyback transformer of the present invention have been described above.

A feature of the invention is that the tertiary winding 15 can interlink the leakage flux of the secondary winding 19 with respect to the primary winding 14 and the magnetic coupling with the primary winding can be weakened. The inter-syringe rectification is formed in one position so that it can be adapted to be used for the rectifier circuit of the tertiary winding.

Since the flyback transformer of the present invention has a superior effect, the adjustment can be made very easily, and the ringing ratio can be reduced without affecting the shut pulse waveform induced in the secondary winding even when the load of the tertiary winding is large. have. In addition, the flyback transformer of the present invention has the advantage of minimizing unnecessary radiation when incorporated into a television receiver as described above.

While the present invention has been fully described with reference to the accompanying drawings, it should be noted that those of ordinary skill in the art will appreciate that various modifications and modifications belong to the art. It is included in the present invention as long as it does not depart from the true scope of the present invention.

Claims (1)

A secondary winding for high pressure supply, which is inserted into the core of the primary coil bobbin and wound on the primary coil bobbin, and the secondary coil for the high pressure supply on the secondary coil bobbin inserted on the primary coil bobbin. Magnetic coupling of at least one portion of the tertiary winding to the primary winding is present in a small amount compared to the magnetic coupling of the secondary winding, and in the primary winding the leakage flux of the secondary winding is arranged to bridge with the tertiary winding or a portion thereof. Fly used in the horizontal deflection circuit of a television receiver, consisting of a commutating circuit connected to an electric tertiary winding that regulates the output of the electric tertiary winding, such as a tertiary winding located therein, the scanning period of a horizontal deflection circuit, etc. Back transformer.

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