CN101593614A - Transformers and how to use them - Google Patents

Abstract

A transformer comprises a winding frame unit and a primary coil, a secondary coil, a core unit, two induction terminals and a detection terminal arranged on the winding frame unit. The core unit forms a magnetic path connecting the primary and secondary coils. The induction terminals are arranged on the winding frame unit and each has a first induction plane and a second induction plane, the first induction planes are opposite to each other and form a first induction capacitor, and the second induction planes face the secondary coil respectively and each form a second induction capacitor. The detection terminal is arranged on the winding frame unit and includes an input section and an output section, and the input section contacts the core unit.

Description

Transformers and how to use them

technical field

The invention relates to a transformer, in particular to a transformer capable of detecting a load state and a usage method thereof.

Background technique

The backlight of the liquid crystal display usually uses a discharge tube circuit. In order to detect the working state of the discharge tube, electronic components such as capacitors and diodes are generally used as a detection medium to obtain a detection signal, and then analyze the detection signal to perform Protective measures, such as switching off the power supply or reducing the voltage.

As shown in the protection circuits for discharge tubes disclosed in Taiwan Patent Application No. 94120180, No. 95218789, and No. 92121581, etc., they all use an existing electronic component as a detection medium, and are directly connected to the discharge tube circuit. Although it has the effect of detecting the state of the discharge tube, when it is connected to the discharge tube circuit, the circuit layout will be affected by the difficulty of the layout due to the consideration of the high voltage creepage distance (Creepage). In addition, when the size of the liquid crystal display increases As a result, when the number of discharge tubes increases, the number of electronic parts used for detection will also increase greatly, which will lead to an increase in cost.

In addition, as shown in the protection circuit for discharge tube disclosed in Taiwan Patent Application No. 92212167, it is characterized in that it detects the "light source" of the discharge tube instead of being directly connected to the discharge tube. Use an existing photoelectric element (such as a photodiode or a coupling element) as the detection medium, and when the number of discharge tubes increases, the number of photoelectric elements used also increases, so when it is applied to a large-size liquid crystal display, It also has the disadvantage of increased cost, and when using "light source" as a detection and judgment, the light source received by each photoelectric element often does not only come from a single discharge tube, but also from the light source emitted by adjacent discharge tubes and reflected by components such as light guide plates. , the light source formed by refraction will have an impact, so it is not accurate to judge the state of each discharge tube, and if it is necessary to detect other load components (such as transformers) that do not emit light, the method of using light source detection is also useful. Disadvantages that cannot be applied.

Contents of the invention

An object of the present invention is to provide a transformer with accurate detection effect and capable of detecting load status without causing difficulty in circuit layout.

Another object of the present invention is to provide a method for using a transformer capable of detecting load status.

The transformer includes a winding frame unit, a primary coil, a secondary coil and an iron core unit arranged on the winding frame unit, and the iron core unit forms a magnetic path connecting the primary coil and the secondary coil.

The transformer of the present invention is characterized in that: the transformer includes two sensing terminals and a detection terminal, the sensing terminals are arranged on the bobbin frame unit, and each has a first sensing plane and a second sensing plane, the first sensing plane A sensing plane is opposite to each other and forms a first sensing capacitance, and the second sensing planes respectively face the secondary coil and respectively form a second sensing capacitance; the detection terminal is arranged on the winding frame unit and includes an input segment and an output segment, the input segment is in contact with the core unit.

And the using method of transformer of the present invention is characterized in that comprising the following steps:

(A) Prepare a transformer, the transformer includes a primary coil, a secondary coil, a core unit, two inductive terminals electrically connected to the load and a conductive detection terminal, each of the inductive terminals has a first inductive plane and a second sensing plane, the first sensing planes face each other and form a first sensing capacitor, the second sensing planes respectively face the secondary coil and form a second sensing capacitor, the detection terminal and The core unit contacts.

(B) Connecting one of the sensing terminals in series with the ground terminal, and obtaining a detection signal from the detection terminal.

(C) Judging whether the load is operating in a normal or abnormal state according to the change of the detection signal when the load is in normal operation.

The beneficial effect of the present invention is that: through the detection signal obtained by the detection terminal, and the change of the detection signal when the load is pre-confirmed to be in normal operation, it can be realized that it does not need to be electrically connected to the load of the transformer, and can also pass through related circuits. Or instrument, to achieve the function of accurately judging whether the load is operating normally.

Description of drawings

Figure 1 is a side view illustrating a first preferred embodiment of the transformer of the present invention and its method of use;

Fig. 2 is a side view illustrating a state in which a detection terminal is in contact with a core unit in the above-mentioned first preferred embodiment;

FIG. 3 is a schematic diagram illustrating an equivalent circuit for detecting a load state in the above-mentioned first preferred embodiment;

Fig. 4 is a schematic view illustrating the normal connection between a transformer and two loads;

Fig. 5 is a waveform diagram during the operation of Fig. 4, illustrating a detection signal change when the operation is normal;

Fig. 6 is a schematic diagram illustrating the abnormal connection between the transformer and a load on the right side;

Fig. 7 is a waveform diagram during the operation of Fig. 6, illustrating the change of the detection signal when the load connection is abnormal;

Fig. 8 is a schematic diagram illustrating the abnormal connection between the transformer and two loads;

Fig. 9 is a waveform diagram during the operation of Fig. 8, illustrating the change of the detection signal when the load connection is abnormal;

Figure 10 is a side view illustrating a second preferred embodiment of the transformer of the present invention;

Figure 11 is a side view illustrating a third preferred embodiment of the transformer of the present invention;

Figure 12 is a side view illustrating a fourth preferred embodiment of the transformer of the present invention;

Fig. 13 is a top view illustrating the fifth preferred embodiment of the transformer of the present invention;

Fig. 14 is a top view illustrating the sixth preferred embodiment of the transformer of the present invention;

Figure 15 is a side view illustrating a seventh preferred embodiment of the transformer of the present invention;

Figure 16 is a side view illustrating an eighth preferred embodiment of the transformer of the present invention;

Fig. 17 is a sectional view illustrating the ninth preferred embodiment of the transformer of the present invention;

Figure 18 is a schematic diagram illustrating a tenth preferred embodiment of the transformer of the present invention; and

Fig. 19 is a schematic diagram illustrating the combination of the transformer and a plurality of connectors in the above-mentioned tenth preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

As shown in Figures 1, 2 and 3, the first preferred embodiment of the transformer 200 and its use method of the present invention, the transformer 200 includes a bobbin unit 20, and a primary coil 31 arranged on the bobbin unit 20 , a secondary coil 32 , a core unit 40 , two sensing terminals 50 and a detection terminal 60 .

The bobbin unit 20 extends along a long direction X.

The secondary coil 31 surrounds the long direction X, and is used to connect and supply power to two loads 201, and the load 201 adopts a discharge tube in this embodiment.

The core unit 40 forms a magnetic path connecting the primary and secondary coils 31 , 32 .

The induction terminals 50 are arranged on the bobbin unit 20, and can be electrically connected to the secondary coil 32 respectively through direct connection of wires or indirect connection of circuit board wiring, and each of the induction terminals 50 has a first induction terminal 50. A plane 51 and a second sensing plane 52, the first sensing planes 51 face each other and form a first sensing capacitor C1, and the second sensing planes 52 respectively face the secondary coil 32 and each form a second sensing capacitor C2. In this embodiment, the first sensing plane 51 extends from the winding frame unit 20 along the long direction X, and the second sensing planes 52 are respectively connected to the first sensing plane 51 and combined with The bobbin unit 20 .

The detection terminal 60 is disposed on the winding frame unit 20 and includes an input section 61 , an output section 62 and a connection section 63 connected between the input section 61 and the output section 62 .

The input section 61 extends from the connection section 63 toward the core unit 40 and contacts the core unit 40 .

The output section 62 is used to output a detection signal. The detection signal changes with the power supply status of the secondary coil 32, thus the operating state of the load can be judged. In this embodiment, the detection signal is directly obtained. From the output section 62 , it can also be obtained from the signal change formed by the output section 62 relative to one of the sensing terminals 50 in actual application.

The connection section 63 is connected to the bobbin unit 20. In this embodiment, the input section 61 is bent and stretched to form an elastic sheet relative to the core unit 40, thereby ensuring that it abuts against the core unit 40. Function.

As shown in Fig. 4 to Fig. 9, the use method of the transformer of the present invention is to provide an accurate judgment of whether the operation status of each load is normal when the above-mentioned transformer 200 is connected to at least one load or multiple loads, and the method includes the following step:

(A) Prepare the same transformer 200 as above, and the two ends of the secondary coil 32 of the transformer 200 have been respectively connected in series with a load 201. In actual application, only one end of the secondary coil 32 may be connected in series with a load 201, The other end is connected in series to the ground (GND) or connected to other circuits. The load 201 in this embodiment uses a discharge tube.

(B) Connect one of the sensing terminals 50 in series with the ground terminal, and obtain the detection signal from the detection terminal 60, which is actually a voltage signal.

(C) Pre-acquire the change of the detection signal when the load 201 is in normal operation, and then compare the change of the detection signal in normal operation with the received detection signal, so as to judge that the load 201 is in operation In a normal state, or one of them is an abnormal state, or both are abnormal states.

For example, when the loads 201 in FIG. 4 are all connected to the transformer 200 (the solid line indicates the connection), FIG. 5 reflects the detection signal changes when the loads 201 are in normal operation. When the connection between the load 201 and the transformer 200 is inaccurate (the imaginary line represents the connection inaccuracy), Fig. 7 reflects the change of the detection signal when one of the loads 201 is abnormal, and the load is shown in Fig. 8 201 is not properly connected to the transformer 200, Figure 9 reflects the abnormal detection signal changes of the load 201, so through the detection signal changes in different states, when the detection signal is obtained through the instrument, product inspection or The maintenance personnel can accurately judge the operation state of the load 201 , and the circuit designer can also design a circuit design that can issue an alarm or provide protection in an abnormal situation according to the voltage value change of the detection signal.

In this way, there is no need to add additional detection components on the circuit board during circuit design, as long as the detection signal is obtained through the detection terminal 60 or the sensing terminal 50, and the load 201 is pre-confirmed to be normal The detection signal changes during operation can achieve the function of accurately judging whether the load 201 is operating normally without being electrically connected to the load of the transformer 200 , and through related circuits or instruments.

As shown in Figure 10, the second preferred embodiment of the present invention will be further described below, which is substantially the same as the first preferred embodiment above, the difference is that the first sensing plane 51 is respectively located at Both sides of the long direction X are combined with the bobbin unit 20, and the second sensing plane 52 is respectively connected to the first sensing plane 51 and runs from the bobbin unit 20 along a direction perpendicular to the length. The transverse direction Y of the direction X extends, so as to form an inductive capacitor and achieve the function of providing the detection signal change.

As shown in Figure 11, the third preferred embodiment of the present invention will be further described below. The third preferred embodiment is substantially the same as the first preferred embodiment above, and the difference is that it also includes an output capacitor 70, the output capacitor 70 is arranged on the bobbin unit 20 and can be directly or indirectly electrically connected between the sensing terminals 50. In this embodiment, the output capacitor 70 is wrapped in the bobbin unit 20, and the output Both ends of the capacitor 70 are electrically connected to the sensing terminal 50 .

As shown in Figure 12, the fourth preferred embodiment of the present invention will be further described below, which is roughly the same as the second preferred embodiment above, except that the bobbin unit 20 includes two plug-in hole 21, the two ends of the output capacitor 70 are inserted into the socket hole 21 and electrically connected to the sensing terminal 50, and the socket hole 21 can also be inserted with a plurality of electric capacitors, resistors, etc. Component.

As shown in Figure 13, the fifth preferred embodiment of the present invention will be further described below. The fifth preferred embodiment is substantially the same as the above-mentioned first preferred embodiment, except that it also includes an output capacitor 70, the winding The frame unit 20 also includes a plurality of separation slots 24, the primary and secondary coils 31, 32 are respectively wound in the separation slots 24, and the output capacitor 70 is arranged in one of the separation slots where the secondary coil 32 is wound. 24, and both ends can be directly or indirectly electrically connected between two terminals.

As shown in Figure 14, the sixth preferred embodiment of the present invention will be further described below. The sixth preferred embodiment is roughly the same as the first preferred embodiment above. The connection terminal 80 of the unit 20, the connection terminal 80 is directly electrically connected to the secondary coil 32 and indirectly electrically connected to the induction terminal 50 through the wiring on the circuit board, and the connection terminal 80 extends along the horizontal direction Y Passing through the opposite sides of the bobbin unit 20, the two ends of the secondary coil 32 are respectively connected to the two ends of one of the terminals 80, whereby the circuit layout can be made on the opposite sides of the bobbin unit 20. Both sides can be connected to the secondary coil 32, thereby achieving the advantages of reducing jumpers and making the circuit layout simpler and easier.

As shown in Figure 15, the seventh preferred embodiment of the present invention will be further described below, which is substantially the same as the first preferred embodiment above, except that the bobbin unit 20 includes a terminal hole 22 , the output section 62 of the detection terminal 60 protrudes through the terminal hole 22 , and has a stop portion 621 against the outer edge of the terminal hole 22 .

As shown in FIG. 16 , the eighth preferred embodiment of the present invention will be further described below. The eighth preferred embodiment is substantially the same as the seventh preferred embodiment above, except that the input section 61 of the detection terminal 60 passes through Extending from the terminal hole 22 , there is an electronic component 611 connected in series with the output section 62 and against the core unit 40 . The electronic component 611 can be a surface mount capacitor or resistor.

As shown in Fig. 17, the ninth preferred embodiment of the present invention will be further described below. The ninth preferred embodiment is substantially the same as the above-mentioned first preferred embodiment, except that the bobbin unit 20 includes a core hole. 23, the input section 61 of the detection terminal 60 is set in the core hole 23, the output section 62 extends out of the bobbin unit 20, the core unit 40 is set in the core hole 23 and is connected with the input section 61 touch.

As shown in Figures 18 and 19, the tenth preferred embodiment of the present invention will be further described below. The tenth preferred embodiment is roughly the same as the above-mentioned first preferred embodiment. The terminal portion 80 of the wire rack unit 20, a plurality of connection terminals 81 respectively arranged on the terminal portion and a plurality of connection terminals 82 respectively arranged beside the connection terminals 81, the connection terminals 81, the connection terminals 82 The connecting terminals 82 are electrically connected with the sensing terminals 50, and the connecting terminals 82 are respectively equipped with a connecting head 90. The connecting heads 90 are made of insulating material, and respectively extend from the surroundings of the sensing terminals 50 to cover the terminal portion 80. , in this embodiment, the terminal portion 80 and the connector 90 adopt a structure of a hook and a block, or a hook and a groove to achieve a stable connection.

Claims (20)

1. a transformer comprises a drum stand unit, and is arranged at a primary coil of described drum stand unit, level coil and a core unit, and described core unit forms a flux path that connects described primary and secondary coil, it is characterized in that:

Described transformer comprises two induction terminals and a detecting terminal, described induction terminal is arranged at described drum stand unit, and respectively have one first induction planes and one second induction planes, described first induction planes toward each other and form one first inductance capacitance, described second induction planes is respectively towards described secondary coil and respectively form one second inductance capacitance; Described detecting terminal is arranged at described drum stand unit, and comprises an input section and a deferent segment, and described input section contacts with described core unit.

2. according to the described transformer of claim 1, it is characterized in that: described drum stand unit extends along a length direction, described secondary coil is around described length direction, described first induction planes extends along described length direction from described drum stand unit, and described second induction planes is connected to described first induction planes and is incorporated into described drum stand unit.

3. according to the described transformer of claim 1, it is characterized in that: described drum stand unit extends along a length direction, described secondary coil is around described length direction, described first induction planes lays respectively at the both sides of described length direction and is incorporated into described drum stand unit, and described second induction planes is connected to described first induction planes and extends from described drum stand unit along a transverse direction perpendicular to described length direction.

4. according to the described transformer of claim 1, it is characterized in that: also comprise an output capacitance, described output capacitance is arranged at described drum stand unit and directly or indirectly is electrically connected between the two-terminal.

5. according to the described transformer of claim 4, it is characterized in that: described two-terminal is described induction terminal.

6. according to the described transformer of claim 4, it is characterized in that: described output capacitance is coated in the described drum stand unit, and the two ends of described output capacitance directly or indirectly are electrically connected with described induction terminal.

7. according to the described transformer of claim 4, it is characterized in that: described drum stand unit comprises two spliced eyes, and the two ends of described output capacitance are inserted in described spliced eye and directly or indirectly are electrically connected with described induction terminal.

8. according to the described transformer of claim 1, it is characterized in that: also comprise a plurality of binding posts that are arranged at described drum stand unit, wherein one being electrically connected of described binding post with described secondary coil, described drum stand unit extends along a length direction, described binding post wherein one along a two opposite sides that passes described drum stand unit perpendicular to the transverse direction of described length direction extends.

9. according to the described transformer of claim 1, it is characterized in that: described detecting terminal comprises that also one is connected in the linkage section between described input section and the described deferent segment, described linkage section is linked to described drum stand unit, and described input section is extended and contacted described core unit towards described core unit from described linkage section.

10. according to the described transformer of claim 1, it is characterized in that: the input section of described detecting terminal is curved to be stretched into one with respect to described core unit rubber-like flexure strip.

11. according to the described transformer of claim 1, it is characterized in that: described drum stand unit comprises a terminal hole, and described detecting terminal is arranged in described terminal hole.

12. according to the described transformer of claim 11, it is characterized in that: the input section of the described detecting terminal described terminal hole that stretches through out, and curved be stretched into one with respect to described core unit rubber-like flexure strip, the described deferent segment described terminal hole that stretches through out, and have a stop section that is resisted against described terminal hole outer rim.

13. according to the described transformer of claim 11, it is characterized in that: the input section of the described detecting terminal described terminal hole that stretches through out, and have one and be series at described deferent segment and be resisted against the electronic component of described core unit, the described deferent segment described terminal hole that stretches through out, and have a stop section that is resisted against described terminal hole outer rim.

14. according to the described transformer of claim 13, it is characterized in that: described electronic component is electric capacity, resistance.

15. according to the described transformer of claim 1, it is characterized in that: described drum stand unit comprises a hole unshakable in one's determination, the input section of described detecting terminal is arranged in the described hole unshakable in one's determination, described deferent segment extends outside the described drum stand unit, and described core unit is mounted on the contact of the described input section of described Kong Bingyu unshakable in one's determination.

16. according to the described transformer of claim 1, it is characterized in that: also comprise a plurality of portion of terminal that are arranged at described drum stand unit, a plurality of binding post that is arranged at described portion of terminal respectively, and a plurality of other splicing ears of described binding post that are arranged at respectively, wherein one being electrically connected to each other of described binding post, described splicing ear and described induction terminal, the described splicing ear connector of arranging in pairs or groups respectively, described connector adopts the insulation material, and is coated to described portion of terminal from extending of described induction terminal on every side respectively.

17. according to the described transformer of claim 16, it is characterized in that: described portion of terminal and described connector are to adopt the structure of grab and fixture block, grab and draw-in groove to link firm.

18. according to the described transformer of claim 1, it is characterized in that: also comprise an output capacitance, described drum stand unit also comprises a plurality of separation troughs, described primary and secondary coil is wound in respectively in the described separation trough, and described output capacitance is arranged at wherein also directly or indirectly being electrically connected between the two-terminal of described separation trough.

19. the using method of a transformer is characterized in that comprising following steps:

(A) preparation one transformer, described transformer comprises a primary coil, level coil, a core unit, two can be electrically connected on the induction terminal of load and the detecting terminals of a conduction, described induction terminal respectively has one first induction planes and one second induction planes, described first induction planes toward each other and form one first inductance capacitance, described second induction planes also respectively forms one second inductance capacitance towards described secondary coil respectively, and described detecting terminal contacts with described core unit;

(B) make wherein connecting of described induction terminal, and obtain a detection signal from described detecting terminal with earth terminal; And

Detection signal during (C) according to described load normal operation changes, and judges whether described load operates in normal or abnormality.

20. using method according to the described transformer of claim 19, it is characterized in that: connect with a load respectively in the secondary coil two ends of described step (A), described step (C) be obtain in advance described load all the detection signal during normal operation change, detection signal during again according to normal operation changes with the described detection signal that receives and compares, and judges that with this described load all is running in normal condition or wherein one is abnormalities or all is abnormality.

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