CN216818078U - High-voltage ring transformer - Google Patents

Abstract

The utility model discloses a high-voltage ring transformer, relates to a transformer, and solves the problem that a machine cannot complete the winding of a coil on an iron core due to the influence of the volume of the conventional high-voltage ring transformer, and the technical scheme is characterized in that: the transformer comprises a plurality of annular coils, wherein each annular coil comprises an annular iron core, the annular iron core is provided with a first insulating layer, a primary coil, an input lead, a second insulating layer, a secondary coil and an output lead from inside to outside, one end of the input lead is welded on the primary coil, and one end of the output lead is welded on the secondary coil; the annular coils are overlapped together from top to bottom, an insulating rubber mat is arranged between the annular coils, and a through hole is formed in the center of the insulating rubber mat; the input leads of the annular coils are sequentially connected in series, and the output leads of the annular coils are sequentially connected in series. The utility model divides a high-voltage ring transformer into a plurality of low-voltage transformers to be wound independently, and can realize the mechanized operation of the transformers for each low-voltage transformer.

Description

High-voltage ring transformer

Technical Field

The present invention relates to a transformer, and more particularly, it relates to a high voltage toroidal transformer.

Background

The toroidal transformer is a large type of electronic transformer, and has been widely used in household appliances and other electronic devices with high technical requirements, and its main purpose is to serve as a power transformer and an isolation transformer. The toroidal transformers have been completed in foreign countries and are widely used in computers, medical equipment, telecommunication, instruments, lighting, and other fields. The lamp is mainly used for audio equipment and automatic control equipment of household appliances, quartz lamp illumination and the like in China. The toroidal transformer has excellent cost performance, output characteristic and anti-interference capacity.

In the prior art, the diameter of a part of transformers is small due to the limitation of the placement space, the height of the transformers is increased, the transformers cannot be wound by machines, only manual winding can be used, the production cost and the labor cost are too high, particularly, some high-voltage transformers cannot be wound by machines due to the limited size, the voltage is high, the number of turns of the coils is large, the manual winding cost is higher, the inter-turn impulse voltage between the coils of the high-voltage transformers is large in the moment of starting the transformers, the insulating layers between the coils can be broken down, the short circuit condition of the transformers is caused, and the service life of the transformers is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-voltage ring transformer, which solves the problems that the winding of a coil on an iron core cannot be finished by a machine due to the influence of the volume of the conventional high-voltage ring transformer, and the service life of the ring transformer is shortened due to overlarge impact voltage of the high-voltage ring transformer at the starting-up moment. The utility model can reduce the production difficulty of the transformer and can effectively reduce the impulse voltage at the moment of starting the ring transformer, thereby reducing the high-voltage impulse between the coils and prolonging the service life of the ring transformer.

The technical purpose of the utility model is realized by the following technical scheme:

a high voltage toroidal transformer, comprising:

the annular coils comprise annular iron cores, the annular iron cores are provided with a first insulating layer, a primary coil, an input lead, a second insulating layer, a secondary coil and an output lead from inside to outside, one end of the input lead is welded on the primary coil, and one end of the output lead is welded on the secondary coil;

the annular coils are overlapped together from top to bottom, an insulating rubber mat is arranged between the annular coils, and a through hole is formed in the center of the insulating rubber mat;

the input leads of the annular coils are sequentially connected in series, and the output leads of the annular coils are sequentially connected in series.

Compared with the prior art, the utility model divides the high-voltage ring transformer formed by the original iron core into a plurality of low-voltage transformers to be wound independently, each small transformer can realize the mechanical operation of the transformer, such as a winding coil, a winding insulating layer and the like, after the iron core is divided into a plurality of parts, the voltage of the high-voltage coil of each iron core is one part of the voltage of the original single transformer, the turn-to-turn voltage difference of the original transformer coil is reduced, the impulse voltage of the ring transformer at the moment of switching on and switching off is reduced, the phenomenon of short circuit of the transformer caused by the impulse voltage breakdown high breakdown insulation is reduced, the service life of the transformer is greatly prolonged, and the production cost of the transformer is reduced.

Further, the primary coil comprises at least two layers of first coil windings, the head of each first coil winding is connected with one input lead, the tail of each first coil winding is connected with the other input lead, and the head and the tail of each first coil winding are connected in series;

the secondary coil comprises at least one layer of second coil winding, the head of the second coil winding is connected with one output lead, the tail of the second coil winding is connected with the other output lead, and the head and the tail between the second coil windings are connected in series.

Furthermore, a first insulating film layer is arranged between the first coil windings, and a second insulating film layer is arranged between the second coil windings.

Furthermore, the distance between the head and the tail of the first coil winding and the distance between the head and the tail of the second coil winding are both 1 cm.

Further, the diameters of the annular iron cores are equal.

Further, the input lead and the output lead are symmetrically arranged on the annular coil.

Furthermore, a plurality of input leads are connected in a welding mode, a first insulating tube is sleeved at a welding point of the input leads, a plurality of output leads are connected in a welding mode, and a second insulating tube is sleeved at a welding point of the output leads.

Furthermore, a third insulating film layer is arranged on each of the first insulating tube and the second insulating tube.

Further, the number of the third insulating film layers is 15-22.

Further, the first insulating tube and the second insulating tube are symmetrically fixed on the outer side surface of the annular coil.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model divides the high-voltage ring transformer formed by the original iron core into a plurality of small transformers to be wound independently, each small transformer can realize the mechanical operation of the transformer, such as a winding coil, a winding insulating layer and the like, after the iron core is divided into a plurality of parts, the voltage of the high-voltage coil of each iron core is one part of the voltage of the original single transformer, the turn-to-turn voltage difference of the original transformer coil is reduced, the impulse voltage of the ring transformer at the moment of switching on and switching off is reduced, the phenomenon of short circuit of the transformer caused by the impulse voltage breakdown high breakdown insulation is reduced, the service life of the transformer is greatly prolonged, and the production cost of the transformer is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a toroidal coil according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a toroidal transformer according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an overlapped toroidal transformer according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a bonding point of an input lead and an output lead according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1. an annular iron core; 2. a first insulating layer; 3. a primary coil; 4. a second insulating layer; 5. a secondary coil; 6. a loop coil; 7. an input lead; 8. an output lead; 9. an insulating rubber pad; 10. a first insulating tube; 11. a second insulating tube 12; a third insulating film layer; 71. inputting a lead wire welding spot; 81. an output lead pad; 211. a nut; 212. a connecting rod; 213. a circular plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example (b):

as shown in fig. 1, 2 and 3, an embodiment of the present application provides a high-voltage toroidal transformer, including:

the coil winding device comprises a plurality of annular coils 6, wherein each annular coil 6 comprises an annular iron core 1, the annular iron core 1 is provided with a first insulating layer 2, a primary coil 3, an input lead 7, a second insulating layer 4, a secondary coil 5 and an output lead 8 from inside to outside, one end of the input lead 7 is welded on the primary coil 3, and one end of the output lead 8 is welded on the secondary coil 5;

the annular coils 6 are overlapped together from top to bottom, an insulating rubber pad 9 is arranged between the annular coils 6, and a through hole is formed in the center of the insulating rubber pad 9;

input leads 7 of the toroidal coil 6 are connected in series in sequence, and output leads 8 of the toroidal coil 6 are connected in series in sequence.

Referring to fig. 3, the plurality of overlapped transformers are bound into a whole by using a polyester film, and then the transformers are fixed or encapsulated. Because a plurality of toroidal coils 6 (that is, equivalent to a plurality of low voltage transformers) will finally constitute a whole coil, therefore, circular plate 213 of wrapping up the both ends of toroidal coil 6 is installed additional to the both ends of toroidal coil 6 that adopts fixed mode, the diameter of circular plate 213 is the same with the diameter of toroidal coil 6, the round hole of the same size with the through-hole of insulating rubber mat 9 has also been seted up at the center of circular plate 213, pass through circular plate 213, insulating rubber mat 9 after with a connecting rod 212 fixed through nut 211 for a plurality of toroidal coils 6 can stable overlapping together. The input lead 7 is connected only to the primary coil 3, and the output lead 8 is connected only to the secondary coil 5.

This embodiment is with the high-voltage ring transformer that original an iron core formed, divide into the independent coiling of a plurality of low-voltage transformers, can all realize the mechanized operation of transformer to every low-voltage transformer, like coil winding and coiling insulating layer etc, high-voltage ring transformer divide into a plurality of toroidal coil 6 backs, the high-voltage coil voltage of every iron core is the one-tenth of former single transformer voltage, its transformer coil interturn voltage difference that originally also reduces thereupon, ring transformer's impulse voltage in the switching on and shutting down moment has been reduced, the phenomenon that leads to the transformer short circuit because impulse voltage punctures high breakdown insulation has been reduced, the life of transformer is greatly prolonged, reduce transformer manufacturing cost.

For example: the transformer with 220V input voltage and 100V output voltage has the required volume diameter of 130mm or less and the height of 160mm or less, the inner diameter of the selected iron core is 65mm, the outer diameter of the selected iron core is 105mm and the height of 110mm, the existing winding machine can not perform machine winding when the height of the transformer exceeds 110mm, therefore, according to the structural change of the embodiment, the iron core is divided into two iron cores with the height of 55mm and the unchanged inner diameter and outer diameter, a single iron core winds the transformer with the voltage of 110V of the primary coil 3 and the voltage of 50V of the secondary coil 5, so that the single iron core can completely wind the input and the output by using the machine respectively, and finally the input coil and the output coil are connected in series outside respectively, thereby greatly reducing the labor cost, improving the production efficiency and realizing the mechanical operation of the transformer.

Another example is: after the iron core is divided into several parts, the voltage of the high-voltage coil of each iron core is a fraction of the voltage of the original single transformer, such as: the transformer core with the primary voltage of 2000V/100V is divided into two transformer cores, the primary voltage of a single transformer is 1000V/50V, the input of the single transformer is divided into three layers for winding, so that the turn-to-turn voltage difference between the first layer and the second layer is only 333.33V, the voltage difference between the coil layers is greatly reduced, the instantaneous impulse voltage of the ring transformer during startup and shutdown is reduced, the phenomenon of transformer short circuit caused by the fact that the impulse voltage breaks through high breakdown insulation is reduced, and the service life of the transformer is greatly prolonged.

As a specific implementation mode, the primary coil 3 comprises at least two layers of first coil windings, the head of each first coil winding is connected with one input lead 7, the tail of each first coil winding is connected with the other input lead 7, and the head and the tail between the first coil windings are connected in series;

the secondary coil 5 comprises at least one layer of second coil winding, the head of the second coil winding is connected with one output lead 8, the tail of the second coil winding is connected with the other output lead 8, and the head and the tail between the second coil windings are connected in series.

The primary coil and the secondary coil are uniformly distributed on the iron core, the primary coil is wound firstly, three layers of coils can be wound, the interval between the head and the tail of each layer is 1cm, insulation treatment is carried out between the layers, more than two layers of polyester belts with the thickness of 0.05mm and polyester films with the thickness of 0.075mm can be wrapped, the short circuit caused by high-breakdown-voltage insulation layers is avoided, the 3 primary coil layers are connected in series, welding points are protected by heat shrinkage of heat shrinkage pipes, one high-voltage-resistant Teflon pipe is sleeved, the three layers of coils are wound, lead wires are welded, the number of layers is wrapped by the insulation layer between the primary stages according to the requirement of the dielectric strength, the number of the layers is generally more than 12, the secondary coil is wound after the insulation is wrapped, the secondary coil is also uniformly distributed on the iron core, the primary coil is wrapped in the iron core, and the middle insulation layer is isolated. If the input of the primary coil 3 is 1000V, and the output of the secondary coil 5 is 50V, because the voltage of 1000V is larger, generally three layers of first coil windings are wound, then the voltage obtained by a single first coil winding is 333.33V, the tail of each layer of first coil winding is sequentially connected with the head of the next layer of coil in series, here, it should be noted that the joint of the head and the tail needs to be protected by heat shrinkage of a heat shrink tube, and then a layer of high-voltage resistant teflon insulating tube is sleeved to improve the insulating withstand voltage of a welding spot and bear the impact voltage brought by the start-up moment of the high-voltage ring transformer, then three layers of first coil windings are equal to the 1000V primary coil 3, and can also be four layers or two layers, and are adjusted according to the level of the primary voltage. In the secondary coil 5, since the input voltage to the secondary coil 5 is small, the secondary coil is generally wound once.

As a specific implementation manner, a first insulating film layer is arranged between the first coil windings, and a second insulating film layer is arranged between the second coil windings.

It should be noted that, in the above embodiment, at the moment of starting the toroidal transformer, a surge voltage is generated between three layers of the first coil winding, and this surge voltage is typically 3-8 times of the rated voltage (i.e. 333.3V), therefore, the first insulating film layer is required to isolate the impulse voltage between layers, prevent the first coil winding from being broken down, the first insulating film layer and the second insulating film layer can be polyester film, polyimide film, polyethylene film, polyvinylidene fluoride film or polytetrafluoroethylene film, etc., polyester film is preferred, one layer of polyester film can bear 1000V voltage, therefore, three layers of the first coil winding are enough to be wound between the layers, one more layer can be added for safety, the insulating property is excellent, the thickness is very thin, even 20 layers of winding, the whole thickness is about 1mm, and the thickness of the annular transformer cannot be increased.

In a specific embodiment, the distance between the head and the tail of the first coil winding and the second coil winding is 1 cm.

It should be noted that, the distance between the head and the tail of the first coil winding and the second coil winding is more than 1cm, so as to increase the creepage distance between the head and the tail coils and avoid the coil windings from being broken down.

As a specific embodiment, the diameters of the toroidal cores 1 are equal.

It should be noted that, since the height of one high-voltage toroidal transformer core is too high, the coil cannot be mechanically wound by the winding machine, and therefore, only the height of the core needs to be changed, and the inner diameter and the outer diameter of the core do not change at all, that is, the core is equivalent to the diameters of the plurality of toroidal cores 1.

In a specific embodiment, the input lead 7 and the output lead 8 are symmetrically arranged on the annular coil 6.

It should be noted that, since a plurality of low-voltage toroidal transformers are finally overlapped to form a high-voltage transformer, the input and output leads of each low-voltage toroidal transformer are connected in series, so that the input and output leads are symmetrically arranged on two sides of the coil, which facilitates the series connection of the input and output leads between the toroidal coils 6 and the subsequent use thereof for other purposes.

In a specific embodiment, a plurality of input leads 7 are connected by welding, a first insulating tube 10 is sleeved at an input lead welding point 71, a plurality of output leads 8 are connected by welding, and a second insulating tube 11 is sleeved at an output lead welding point 81.

It should be noted that, in the above embodiment, in order to avoid being broken down by a high voltage at the moment of starting the toroidal transformer, the serial connection portion of the input lead 7 and the output lead 8 needs to be insulated, the serial connection is realized by welding, and the welding point portion of the two leads needs to be subjected to thermal shrinkage treatment by using a thermal shrinkage tube, and after the treatment, a layer of insulating tube is sleeved, so that not only a certain insulating effect is achieved, but also the welding point is protected, and the insulating tube may be a teflon insulating tube, or a fiber tube, and the like.

As shown in fig. 4, as a specific embodiment, a third insulating film layer 12 is disposed on each of the first insulating tube 10 and the second insulating tube 11.

In order to further prevent the breakdown at the welding point due to the impulse voltage generated at the moment of starting the toroidal transformer, the third insulating film layer 12 may be wound around the first insulating tube 10 and the second insulating tube 11, and the third insulating film layer 12 may be made of a polyester film, a polyimide film, a polyethylene film, a polyvinylidene fluoride film, a polytetrafluoroethylene film, or the like, or may be wrapped with the insulating rubber mat 9.

In a specific embodiment, the number of the third insulating film layers is 15 to 22.

It should be noted that, for a high-voltage toroidal transformer, the impulse voltage at the welding point of the transformer at the moment of starting up the transformer may reach about ten thousand volts, so to avoid the transformer from being broken down, 15-22 layers of insulating films are required to be wrapped at the welding point to ensure the insulating strength at the welding point, which may be determined according to the actual situation, and a suitable layer number is selected according to the voltage of the toroidal transformer to save the cost.

As a specific embodiment, the first insulating tube 10 is fixed on the outer side surface of the toroidal coil 6 symmetrically to the second insulating tube 11.

It should be noted that, finally, after the plurality of toroidal coils 6 are overlapped, the fixing or potting is performed, and therefore, the first insulating tube 10 and the second insulating tube 11 wrapping the welding points of the input and output leads 8 are respectively fixed on the outer side surface of the toroidal coil 6, so as to prevent the first insulating tube 10 and the second insulating tube 11 from being pulled in the potting process, and the input lead 7 and the output lead 8 of the plurality of toroidal coils 6 from being broken, so that the transformer is discarded.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A high voltage toroidal transformer, comprising:

the coil winding structure comprises a plurality of annular coils (6), wherein each annular coil (6) comprises an annular iron core (1), the annular iron core (1) is provided with a first insulating layer (2), a primary coil (3), an input lead (7), a second insulating layer (4), a secondary coil (5) and an output lead (8) from inside to outside, one end of the input lead (7) is welded on the primary coil (3), and one end of the output lead (8) is welded on the secondary coil (5);

the annular coils (6) are overlapped together from top to bottom, an insulating rubber mat (9) is arranged between the annular coils (6), and a through hole is formed in the center of the insulating rubber mat (9);

the input lead (7) of the annular coil (6) is sequentially connected in series, and the output lead (8) of the annular coil (6) is sequentially connected in series.

2. A high voltage toroidal transformer according to claim 1, wherein said primary winding (3) comprises at least two layers of first coil windings, the head of said first coil windings being connected to one input lead (7), the tail of said first coil windings being connected to another input lead (7), the head and tail between said first coil windings being connected in series;

the secondary coil (5) comprises at least one layer of second coil winding, the head of the second coil winding is connected with one output lead (8), the tail of the second coil winding is connected with the other output lead (8), and the head and the tail of the second coil winding are connected in series.

3. A high voltage toroidal transformer according to claim 2, wherein a first insulating film layer is provided between said first coil windings and a second insulating film layer is provided between said second coil windings.

4. A high voltage toroidal transformer according to claim 3, wherein the spacing between the head and tail portions of said first and second coil windings is 1 cm.

5. A high voltage toroidal transformer according to claim 1, wherein said toroidal cores (1) are of equal diameter.

6. A high voltage toroidal transformer according to claim 1, wherein said input leads (7) and said output leads (8) are symmetrically arranged on said toroidal coil (6).

7. The high-voltage ring transformer of claim 6, wherein a plurality of input leads (7) are connected by welding, a first insulating tube (10) is sleeved at an input lead welding point (71), a plurality of output leads (8) are connected by welding, and a second insulating tube (11) is sleeved at an output lead welding point (81).

8. A high voltage toroidal transformer according to claim 7, wherein said first insulating tube (10) and said second insulating tube (11) are provided with a third insulating film layer (12).

9. The high voltage toroidal transformer of claim 8, wherein said third insulating film layer has a number of layers of 15-22.

10. A high voltage toroidal transformer according to claim 7, wherein said first insulating tube (10) and said second insulating tube (11) are symmetrically fixed on the outer side surface of the toroidal coil (6).

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