CN201590311U - Transformer device capable of detecting output state - Google Patents

Abstract

A transformer device capable of detecting output state is provided with a transformer, wherein the transformer comprises a first winding area, a second winding area, a primary coil, two secondary coils, an induction coil and an iron core unit. The second winding area and the first winding area are arranged at intervals. The primary coil is wound in the first winding area. The secondary coil is wound on the second winding area at intervals. The induction coil comprises a starting end, an ending end and a winding section formed between the starting end and the ending end, the starting end and the ending end extend to the first winding area, and the winding section is wound between the secondary coils. The core unit forms a magnetic path connected to the primary coil, the secondary coil, and the induction coil.

Description

Transformer device that detects output state

technical field

The utility model relates to a transformer device, in particular to a transformer device capable of detecting an output state.

Background technique

The backlight of the liquid crystal display usually adopts a discharge tube circuit. The circuit design generally considers the detection of the working state of the discharge tube, and performs the work of protecting the circuit by analyzing a detection signal, such as turning off the power supply or reducing the voltage.

As disclosed in Taiwan Patent Application No. 94120180, No. 95218789, and No. 92121581, the protective circuits for discharge tubes are all directly connected to the discharge tube circuit. Although they have the effect of detecting the state of the discharge tube, when connecting with the discharge tube circuit , the circuit layout will be difficult due to the consideration of the high voltage creepage.

In addition, as disclosed in Taiwan Patent Application No. 92212167, the protection circuit for discharge tubes is characterized in that it is detected by sensing the "light source" of the discharge tube, and is not directly connected to the discharge tube. Therefore, it can be seen that a photoelectric element ( For example, photodiodes) are used as the detection medium. However, when the number of discharge tubes increases, the number of photoelectric elements used also increases, so there will be a disadvantage of increasing the cost on large-scale liquid crystal displays. In addition, the use of "light source" It is not accurate to judge the state of each discharge tube as a detection.

Contents of the invention

The purpose of the utility model is to provide a transformer device capable of detecting the output state with easy circuit layout and low cost.

The transformer device has a transformer comprising a first winding area, a second winding area, a primary coil wound on the first winding area, two primary coils wound on the second winding area at intervals The secondary coil in the line area, and a core unit.

The transformer device of the utility model is characterized in that: the first winding area and the second winding area are arranged at intervals, the transformer also includes an induction coil, the induction coil includes a starting end, an ending end, and a coil formed on the The winding section between the start end and the end end, the start end and the end end extend to the first winding area, the winding section is wound between the secondary coils, the core unit forms a connection between the The primary coil, the secondary coil, and the magnetic path of the induction coil.

The beneficial effect of the utility model is that: when the transformer device is in operation, the induction coil can generate mutual inductance and ripple effect with the secondary coil, so the operation of the secondary coil can be judged by the signal change on the induction coil Whether the state is normal, without the need for additional detection components, to achieve the advantage of low cost. In addition, because the starting end and the ending end of the induction coil extend to the first winding area, when designing the circuit layout, it only needs to be laid out to The first winding area can be electrically connected to the starting end and the ending end without the need to cross the circuit layout to the second winding area of high voltage, so the advantage of easier circuit layout can be achieved.

Description of drawings

Fig. 1 is a three-dimensional exploded view illustrating a preferred embodiment of the transformer device capable of detecting the output state of the present invention;

Fig. 2 is a three-dimensional assembled view, illustrating in the above-mentioned preferred embodiment, a primary coil, two secondary coils, an induction coil, a first bobbin, a second bobbin, a combined frame, and an iron core the combined state of the unit;

Fig. 3 is a cross-sectional view along the line III-III in Fig. 2, illustrating that in the above-mentioned preferred embodiment, the first and second bobbins are fitted into the assembled state of the combined frame;

Fig. 4 is a bottom view, illustrating that in the above-mentioned preferred embodiment, a starting end and an ending end of the induction coil extend from the bottom of the assembly frame to the welding structure of the first winding frame;

Fig. 5 is a schematic diagram illustrating the structure of connecting a switch unit, a power control unit, a feedback unit, and a plurality of discharge tubes in the above-mentioned preferred embodiment;

Fig. 6 is a schematic diagram illustrating the circuit structure of a voltage feedback module included in the feedback unit in the preferred embodiment above;

Fig. 7 is a schematic diagram illustrating that in the preferred embodiment above, when multiple transformers are used, all induction coils can be connected in parallel, and the feedback unit can also include a current feedback module;

Fig. 8 is a schematic diagram illustrating the circuit structure of a current feedback module included in the feedback unit in the above-mentioned preferred embodiment; and

Fig. 9 is a schematic diagram illustrating that in the preferred embodiment above, when multiple transformers are used, all the induction coils can be connected in series.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

As shown in Figures 1, 2, and 3, the preferred embodiment of the transformer device capable of detecting the output state of the utility model has a transformer 200, and the transformer 200 includes a first winding area 201, a 201, a second winding area 202 arranged at intervals, a primary coil 31, two secondary coils 32, an induction coil 33, a first bobbin 40, a second bobbin 50, a An extended assembly frame 60, and a core unit 70.

The primary coil 31 is wound on the first winding area 201 .

The secondary coils 32 are wound on the second winding area 202 at intervals.

The induction coil 33 includes a starting end 331, an ending end 332, and a winding segment 333 formed between the starting end 331 and the ending end 332, the starting end 331 and the ending end 332 extending to the first winding In the wire area 201, the winding section 333 is wound between the secondary coils 32, and the insulation effect of the induction coil 33 conforms to the distance between the first winding area 201 and the second winding area 202 along the surface and the space distance. Safety norms, the safety norms in this embodiment refer to the safety norms (such as IEC60065, IEC60950, IEC60664-1...) formulated by the International Electrotechnical Commission (IEC, International Electrotechnical Commission), or electrical certification bodies (TUV, VDE, UL) safety regulations, the insulated voltage of the induction coil 33 is greater than 3750V. In addition, the induction coil 33 can use a wire covered with multiple insulation layers during manufacture, and the wire can use copper wire, and the insulation layer can use Teflon casing, or other materials with insulating effect to meet safety regulations.

The first and second winding frames 40, 50 are combined with the assembly frame 60 from opposite sides of the axis X respectively, and the first and second winding areas 201, 202 are respectively formed on the first winding area with the axis X as the boundary. , Two bobbins 40,50.

The first bobbin 40 has a first body 41 extending along the axis X, two first openings 42 respectively formed on opposite ends of the first body 41, and a plurality of first openings 42 disposed on the first body. 41 on the first terminal 43.

The second bobbin frame 50 has a second body 51 extending along the axis X, two second openings 52 respectively formed on opposite ends of the second body 51, and a plurality of second openings 52 disposed on the second body. The second terminal 53 on the 51, the first and second openings 42, 52 are respectively open towards the axial direction of the first and second bodies 41, 51 and the assembly frame 60, the first and second terminals 43, 53, two of them are respectively inserted into the first and second bodies 41, 51 from the first and second openings 42, 52, so as to be electrically connected with the core unit 70, and only singular numbers may be used in actual manufacturing. Any one of the first and second terminals 43 , 53 is selected to be electrically connected to the core unit 70 .

The assembly frame 60 includes a first accommodating groove 61 fitted with the first bobbin frame 40, a second accommodating groove 62 fitted with the second bobbin frame 50, and a corresponding to the induction coil. The trunking 63 at 33 positions.

The first accommodating groove 61 has two first upper slits 611 respectively fitted with the upper wall of the first opening 42 , and two first upper slits 611 respectively fitted with the lower wall of the first opening 42 . Crack 612 once.

The second accommodating groove 62 has two second upper slits 621 respectively fitted with the upper wall surface of the second opening 52 , and two second upper slits 621 respectively fitted with the lower wall surface of the second opening 52 . Second crack 622. The first and second accommodating grooves 61 and 62 fit closely with the inner and outer sides of the first and second openings 42 and 52 , so as to achieve the functions of increasing the fitting effect and creeping distance.

The wire slot 63 extends on the left, right and bottom of the assembly frame 60, and the wire slot 63 allows the induction coil 33 to extend in the wire slot 63 without protruding from the bottom surface of the transformer 200, so that the The bottom surface of the transformer 200 is flat and the overall height is reduced.

The core unit 70 forms a magnetic path connected to the primary coil 31, the secondary coil 32, and the induction coil 33. core.

As shown in Figures 1, 2, and 4, when the transformer 200 is manufactured, the primary coil 31 is pre-wound on the first bobbin 40, and the secondary coil 32 and the induction coil 33 are pre-wound on the first bobbin 40. On the second winding frame 50, after the combination of the first and second winding frames 40, 50 and the combined frame 60 is completed, the starting end 331 and the ending end 332 are removed from the wire slot 63 at the bottom of the combined frame 60. It extends to the first winding frame 40 and is welded to the two first terminals 43 respectively. Finally, the core unit 70 is assembled and fixed to complete the manufacturing operation of the transformer 200 .

As shown in FIGS. 2 and 5 , the transformer 200 can be electrically connected to a switch unit 81 , a feedback unit 82 , and a power control unit 83 during application.

The secondary coil 32 is electrically connected to two discharge tubes 90 respectively.

Two of the first terminals 43 are electrically connected to the core unit 70 , whereby the core unit 70 is electrically connected to a grounding line of the transformer device through the first terminals 43 in this embodiment.

The switch unit 81 is electrically connected to the primary coil 31 .

The feedback unit 82 is electrically connected between the induction coil 33 and the switch unit 81, the switch unit 81, the feedback unit 82, the power control unit 83, and the first winding area 201 are all located in the same position as the first winding area 201. The two winding areas 202 are spaced apart from each other on the same side, so that the circuit layout can comply with the safety specifications of the creepage distance and space distance between the first winding area and the second winding area.

The power control unit 83 controls power output to the switch unit 81 .

When the transformer device is in operation, two protection processes can be designed according to actual needs. The first one is shown in FIGS. The voltage feedback module 821, the voltage feedback module 821 receives a voltage signal of the induction coil 33 and converts it to the switch unit 81, and when the voltage signal is too large and abnormal, the switch unit 81 automatically interrupts or lowers the voltage signal of the primary coil. 31 power supply, and then achieve the function of protecting the circuit.

The second type is shown in Figures 7 and 8. The second type is that the feedback unit 82 also includes a current feedback module 822, and the voltage feedback module 821 is electrically connected to the induction coil 33, the switch unit 81 and the power Control unit, the current feedback module 822 is electrically connected to the secondary coil 32 and the power control unit 83, the current feedback module 822 receives a current signal of the secondary coil 32 and converts it to the power control unit 83 , the power control unit 83 cooperates with the current signal to interrupt the power supply to the switch unit 81. The current signal will actually be obtained from the secondary coil 32 through a current detection circuit 9. In actual manufacturing, the current detection circuit 9 A resistor 91 is connected in series with the circuit of the discharge tube 90 formed by each transformer 200 , and an optical coupler 92 is used to convert the current on each resistor 91 into an optical signal and input it to the current feedback module 822 .

Thereby, when the transformer device is in operation, the induction coil 33 can be coupled with the secondary coil 32, so whether the working state of the secondary coil 32 can be judged through the signal change on the induction coil 33, No additional detection components are needed, and the advantage of low cost is achieved. In addition, because the starting end 331 and the ending end 332 of the induction coil 33 extend to the first winding area 201, and comply with safety regulations, when designing the circuit layout , it only needs to be laid out to the first winding area 201 to be electrically connected to the start end 331 and the end end 332, without the need to cross the circuit layout to the second winding area 202 of high voltage, so the circuit can be achieved The advantage of easier layout, in addition, if the current signal of the secondary coil 32 must be received, it can be achieved through the current detection circuit 9 and the current feedback module 822 .

As shown in Figures 7 and 9, it is worth mentioning that when a transformer device also includes multiple transformers 200, the induction coils 33 of the transformers 200 can be connected in parallel (as shown in Figure 7) or in series (as shown in Figure 9 shown), the discharge tube 90 can also be connected in different ways in the second winding area 202, and the feedback unit 82 can use a transistor, multiple diodes, multiple resistors and multiple capacitors during actual manufacturing In the detection circuit formed, the induction coil 33 is electrically connected to the detection circuit, whereby the output signal can be provided to achieve the function of detecting the output state.

Claims (15)

1. the device for transformer that can detect output state, has a transformer, this transformer comprises one first winding region, second winding region, one and is wound in the primary coil of this first winding region, two secondary coils that are wound in this second winding region at intervals, and a core unit, this device for transformer is characterised in that:

This first winding region and this second winding region are provided with at interval, this transformer also comprises an induction coil, this induction coil comprises an initiating terminal, an end end, and coiling section that is formed between this initiating terminal and this end end, this initiating terminal and this end end extend to this first winding region, this coiling section is wound between the described secondary coil, and this core unit forms one and is connected in this primary coil, described secondary coil, and the flux path of this induction coil.

2. the device for transformer of detecting output state as claimed in claim 1 is characterized in that: this induction coil is a lead that is coated with a plurality of insulating barriers.

3. the device for transformer of detecting output state as claimed in claim 1, it is characterized in that: this transformer also comprises one first drum stand, second drum stand, and combined bay, this combined bay extends along an axis, this first and second drum stand is incorporated into this combined bay from the two opposite sides of this axis respectively, and this first and second winding region serves as that boundary is formed at respectively on this first and second drum stand with this axis.

4. the device for transformer of detecting output state as claimed in claim 3, it is characterized in that: this first drum stand has first body that extends along this axis, two first peristomes that are formed at the opposite end of this first body respectively, and a plurality of the first terminals that are arranged on this first body, this second drum stand has second body that extends along this axis, two second peristomes that are formed at the opposite end of this second body respectively, and a plurality of second terminals that are arranged on this second body, described first, two peristomes respectively towards this first, axial and this combined bay of two bodies is open, this combined bay comprises first storage tank chimeric with this first drum stand, and second storage tank chimeric with this second drum stand.

5. the device for transformer of detecting output state as claimed in claim 4, it is characterized in that: first storage tank of this combined bay have two respectively with the top wall of described first peristome chimeric first on crack, and two first time chimeric with the below wall of described first peristome respectively cracks, this second storage tank have two respectively with the top wall of described second peristome chimeric second on crack, and two second time chimeric with the below wall of described second peristome respectively cracks.

6. the device for transformer of detecting output state as claimed in claim 3, it is characterized in that: this combined bay comprises a wire casing corresponding to this induction coil position, this wire casing extends the left and right side and the bottom of this combined bay, and the initiating terminal of this induction coil and this end end extend on this first drum stand from the wire casing of this combined bay bottom.

7. the device for transformer of detecting output state as claimed in claim 3, it is characterized in that: this first drum stand has first body that extends along this axis, and a plurality of the first terminals that are arranged on this first body, wherein being electrically connected of described the first terminal with this core unit.

8. the device for transformer of detecting output state as claimed in claim 3, it is characterized in that: this second drum stand has second body that extends along this axis, and a plurality of second terminals that are arranged on this second body, wherein being electrically connected of described second terminal with this core unit.

9. the device for transformer of detecting output state as claimed in claim 1, it is characterized in that: also have one and be electrically connected on the switch element of this primary coil, a power control unit that is electrically connected on this switch element, and back coupling unit, this back coupling unit is electrically connected on this induction coil, this switch element, this back coupling unit, this power control unit, reach this first winding region and all be positioned at and this second winding region the same side separately, and meet the safety standard of this first winding region the creepage distance and the space length of this second winding region.

10. the device for transformer of detecting output state as claimed in claim 9 is characterized in that: this induction coil is a lead that is coated with a plurality of insulating barriers.

11. the device for transformer of detecting output state as claimed in claim 9 is characterized in that: have a plurality of transformers, the induction coil of described transformer is parallel with one another.

12. the device for transformer of detecting output state as claimed in claim 9 is characterized in that: have a plurality of transformers, the induction coil of described transformer is connected mutually.

13. the device for transformer of detecting output state as claimed in claim 9 is characterized in that: the core unit of this transformer is electrically connected with an earth connection.

14. the device for transformer of detecting output state as claimed in claim 9, it is characterized in that: this back coupling unit comprises a voltage back coupling module that is electrically connected between this induction coil and this switch element, this voltage is feedback module and is received a voltage signal of this induction coil and be transformed into this switch element, and this switch element cooperates this voltage signal and interrupts power supply to this primary coil.

15. the device for transformer of detecting output state as claimed in claim 9, it is characterized in that: this back coupling unit comprises a voltage back coupling module and an electric current back coupling module, this voltage back coupling module is electrically connected on this induction coil, this switch element and this power control unit, this voltage back coupling module receives a voltage signal of this induction coil and is transformed into this switch element, this switch element cooperates this voltage signal and interrupts power supply to this primary coil, this electric current back coupling module is electrically connected on described secondary coil and this power control unit, this electric current is feedback module and is received a current signal of described secondary coil and be transformed into this power control unit, and this power control unit cooperates this current signal and interrupts power supply to this switch element.

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