CN210899097U - Structure for forming series resonance circuit by jointing transformer, capacitor and inductor - Google Patents
Structure for forming series resonance circuit by jointing transformer, capacitor and inductor Download PDFInfo
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- CN210899097U CN210899097U CN201921405645.8U CN201921405645U CN210899097U CN 210899097 U CN210899097 U CN 210899097U CN 201921405645 U CN201921405645 U CN 201921405645U CN 210899097 U CN210899097 U CN 210899097U
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Abstract
The utility model discloses a structure of a series resonance circuit formed by the joint of a transformer, an inductor and a capacitor, which comprises a transformer component, a capacitor component and an inductor component, wherein the transformer component, the capacitor component and the inductor component are sequentially conducted end to form the series resonance circuit; the structure further comprises a metal connecting shell, the capacitor assembly and the transformer assembly are arranged in the metal connecting shell, the right electrode plate of the capacitor is tightly attached to and conducted with the side wall of the metal connecting shell, the inductor assembly is arranged outside the metal connecting shell, and the inductor assembly is conducted with the capacitor through the metal connecting shell. The utility model discloses an adjustment transformer, inductance component and capacitance component's positional relation to switch on electric capacity and the laminating of metal connection shell ingeniously, make electric current evenly pass through electric capacity, avoid it to generate heat or even puncture because of the electric current is concentrated, promoted the stability and the life of circuit, gained good result of use.
Description
Technical Field
The utility model belongs to the technical field of the high frequency alternating circuit, in particular to transformer, electric capacity and inductance's joint structure.
Background
Induction heating is an advanced heating technique that has advantages not found in conventional heating methods, such as: the induction heating technology is widely applied to the fields of smelting, casting, hot forging, welding, material surface heat treatment and the like at present, and becomes an indispensable technology in the industries of metallurgy, national defense, manufacturing and the like.
An induction heating apparatus and an induction heating cooker having the same are disclosed in patent application No. 201080056152.3, wherein the induction heating apparatus has: an inverter circuit that outputs an ac signal by on/off operations of the plurality of switching elements; a control unit that drives and controls the plurality of switching elements; and a plurality of resonance circuits each including a heating coil and a resonance capacitor for inductively heating an object to be heated, wherein the switching element is driven and controlled in a frequency region higher than the highest resonance frequency or lower than the lowest resonance frequency of the resonance frequencies of the plurality of resonance circuits, and the plurality of resonance circuits are combined to form at least 1 induction heating source. The heating device that this patent application provided is to induction heating's practical application, and this kind of heating device mainly is applied to under power frequency, the daily municipal voltage environment.
In recent years, induction heating technology is gradually developed towards high frequency, the high frequency induction heating technology is applied to specific industrial environments, a circuit of the high frequency induction heating technology generally consists of three parts of rectification, inversion and resonance, and common resonance part circuits comprise a series resonance circuit and a parallel resonance circuit.
In patent application No. 201610983315.1, a method for adjusting resonant frequency of series type induction heating power supply based on current compensation is disclosed, which comprises the following steps: (1) the controllable current source outputs compensation current; (2) when the resonant frequency is higher or lower than the given resonant frequency, the controllable current source outputs compensation current which is in the same phase or opposite to the phase of the sampling current; (3) injecting compensation current at two ends of the capacitor C, and adjusting the resonant frequency of the induction heating system; (4) enabling the RLC resonant circuit to work at a resonant frequency; (5) outputting a new resonant frequency value, and repeating the processes from the step (1) to the step (5) again until the end. It is clear from this patent that a series resonant circuit is used in a specific industrial application, and includes a transformer, an inductive capacitor and an inductive inductor, and the transformer, the inductive capacitor and the inductive inductor are connected in series to form a resonant circuit.
The induction capacitance and induction inductance of the series resonance circuit applied in the high-frequency alternating circuit often fail due to the skin effect, proximity effect and dielectric loss of the capacitance of the circuit. The skin effect, also called skin effect, refers to the phenomenon that when an alternating current passes through a conductor, the current is concentrated in a thin layer adjacent to the outer surface of the conductor, and the current does not flow through the center of the conductor but flows only on the surface of the conductor. The proximity effect means that after an alternating current passes through two conductors which are close to each other, current magnetic fields generated by the two conductors are mutually influenced, so that the original current on the conductors is redistributed. The dielectric loss of the capacitor refers to the energy loss caused by the dielectric conductivity and the hysteresis effect of the dielectric polarization of the insulating material under the action of the electric field.
In the series resonance circuit under the high-frequency alternating environment, the effect is intuitively embodied as follows: the current flows along the shortest path, and the capacitor in a non-ideal state has dielectric loss, so the capacitor is easy to generate a large amount of heat, and in a serious case, the capacitor can be broken down or burnt.
When a series circuit in a high-frequency alternating environment is implemented, a single lead is generally connected with a transformer, a capacitor and an inductor end to end in sequence to form a series resonance structure, and in the prior art, technicians generally adopt the following two ways to construct the series resonance structure.
Referring to fig. 1, in this configuration, the series resonant structure includes a primary side Ta1 of the transformer, a magnetic core Tca, a secondary side Ta2, a capacitor Ca, and an induction coil La, wherein the primary side and the secondary side of the transformer are wound around the magnetic core, one end of the secondary side is connected to an outer surface of one of the plates of the capacitor Ca through a wire, a wire connection point is correspondingly disposed on an outer surface of the other plate of the capacitor Ca, the wire connects the capacitor Ca to one end of the induction coil La through the wire connection point, and the other end of the induction coil La is connected to the other end of the secondary side Ta through a wire.
Referring to fig. 2, in this structure, the series circuit also includes a primary side Tb2 of the transformer, a magnetic core Tcb, a secondary side Tb2, a capacitor Cb, and an induction coil Lb, the primary side and the secondary side of the transformer are wound around the magnetic core, one end of the secondary side is connected to an end of one of the plates of the capacitor Cb, a lead connection point is further disposed at a corresponding end of the other pole of the capacitor Cb, the lead connects the capacitor Cb to one end of the induction coil Lb through the connection point, and the other end of the induction coil Lb is connected to the other end of the secondary side Tb through the lead.
When the series resonant circuit constructed by the method is applied to a high-frequency environment, a strong current easily flows along a connecting line of wire connecting points arranged on two polar plates due to the proximity effect of the current, and when the capacitor is in a high-frequency and high-current condition for a long time, a dielectric layer of the capacitor is easily broken down by the strong current along a current flowing path to damage the capacitor, so that the stability of the circuit cannot be ensured.
Disclosure of Invention
In order to solve the above problem, an object of the present invention is to provide a transformer structure connected to an inductor and a capacitor to form a series resonant circuit, which is applied to an alternating current environment of high frequency, high voltage or large current, and can effectively reduce the phenomenon that the capacitor generates heat or even burns out due to the skin effect, the proximity effect and the dielectric loss.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a structure that a transformer is connected with an inductor and a capacitor to form a series resonance circuit, which comprises a transformer component, a capacitor component and an inductor component, wherein the transformer component, the capacitor component and the inductor component are sequentially conducted end to form the series resonance circuit;
the capacitor assembly comprises a capacitor, the capacitor comprises a left polar plate, a dielectric medium and a right polar plate, the dielectric medium is arranged between the left polar plate and the right polar plate, the dielectric medium and the left polar plate are sequentially stacked and fixedly connected;
the structure also comprises a metal connecting shell, wherein an accommodating cavity is arranged in the metal connecting shell, the capacitor assembly and the transformer assembly are both arranged in the accommodating cavity, and the transformer assembly is insulated from the metal connecting shell; one end of the transformer assembly is conducted with the left pole plate, the right pole plate is tightly attached to and conducted with the side wall of the metal connecting shell, the inductor assembly is arranged outside the metal connecting shell, one end of the inductor assembly is conducted with the metal connecting shell, and the other end of the inductor assembly is conducted with the other end of the transformer assembly.
In a series resonance circuit formed by the connection of a transformer, a capacitor and an inductor, the transformer plays a role in converting an external alternating power supply into alternating power with a specified amplitude, the converted alternating power is connected with the capacitor through one end of the transformer, then is conducted with the inductor through the capacitor, and finally is conducted with the other end of the transformer through the inductor to form the series resonance circuit.
Compare with the series resonance circuit in the alternating circuit under traditional high frequency, high pressure, the heavy current environment of being applied to, in the structure, through addding the metal connection shell, closely laminate the right polar plate of electric capacity and the lateral wall of metal connection shell, when the high frequency alternating current after transformer assembly transform passes through the form conveying of electric field between the upper and lower bipolar plate of electric capacity, the electric current will pass through evenly to effectively reduced and concentrated the phenomenon of generating heat and then puncturing and take place because of skin effect and adjacent effect electric capacity.
The transformer assembly comprises a transformer, the transformer comprises a primary side, a secondary side and a magnetic core, the primary side and the secondary side are wound on the magnetic core, the primary side is connected with an external power supply, one end of the secondary side is connected with a left pole plate, and the other end of the secondary side is connected with the inductance assembly. The primary side and the secondary side of the transformer are coupled through the magnetic core, and the two ends of the secondary side are respectively connected with the capacitor assembly and the inductor assembly, so that the whole transformer can be fixed in the metal connecting shell in a suspended state, and the insulation between the transformer and the metal connecting shell is conveniently realized.
The transformer assembly further comprises a magnetic core water cooling ring and a magnetic core water cooling pipe, the magnetic core water cooling ring is tightly attached to the magnetic core, a water cooling cavity is arranged inside the magnetic core water cooling ring, and the water cooling cavity is communicated with an external cooling water pipeline through the magnetic core water cooling pipe. The transformer is easy to generate heat under the high-frequency environment, the magnetic core water-cooling ring is arranged at the position tightly attached to the magnetic core, and the magnetic core water-cooling ring is conducted with external cooling water through the magnetic core water-cooling tube, so that the water-cooling circulation of the transformer can be effectively realized, and the normal work of the transformer is ensured.
And a through hole is formed in the metal connecting shell corresponding to the conducting position of the secondary side and the inductance component, and the secondary side extends out of the through hole and is conducted with the inductance component.
The transformer assembly further comprises an insulating ring, the insulating ring is sleeved on the secondary side, and the insulating ring is tightly embedded in the via hole to insulate and isolate the secondary side from the metal connecting shell. The transformer should guarantee with the metal connection between the shell strictly insulating when keeping well switching on between electric capacity subassembly and the inductance subassembly, consequently the utility model provides an in the mechanism, the transformer subassembly has still set up the insulating collar, establishes the insulating collar on the assistant to with the inseparable gomphosis of insulating collar in the conducting hole, when making things convenient for the assistant to stretch out from the conducting hole and switch on with the inductance subassembly, keep transformer and metal connection shell strictly insulating.
The capacitor assembly further comprises a capacitor water cooling sheet and a capacitor water cooling tube, the capacitor water cooling tube is connected with the capacitor water cooling sheet, the capacitor water cooling sheet is tightly attached to the left electrode plate of the capacitor, a water cooling cavity is formed in the inner portion of the capacitor water cooling sheet, and external cooling water is communicated with the water cooling cavity through a capacitor water cooling tube. Although set up the metal connection shell to hug closely the metal connection shell with the right polar plate of electric capacity and pass through electric capacity in order to guarantee that electric current is even, under the high frequency environment, the electric capacity generate heat in the inevitable, for guaranteeing electric capacity normal work, and effectively prolong the life of electric capacity the utility model provides an electric capacity water-cooling piece and electric capacity water-cooling tube have still been add in the structure, can work under normal temperature environment with further assurance electric capacity through external cooling water.
The inductance assembly comprises a first electrode, a second electrode and an inductance coil, the first electrode is conducted with the metal connecting shell, the second electrode is conducted with the secondary side, two ends of the inductance coil are detachably connected with the first electrode and the second electrode respectively, and when two ends of the inductance coil are connected with the first electrode and the second electrode respectively, the inductance coil is conducted with the first electrode and the second electrode respectively. Series resonance circuit uses in induction heating device, and inductance coils uses as the heating device at terminal usually, sets up the inductance subassembly into the mode that inductance coils and first electrode and second electrode are detachable to be connected, makes things convenient for the whole processing of circuit to dispatch from the factory on the one hand, and on the other hand also convenience of customers assembles or maintains, promotes the wholeness ability of product.
The utility model has the advantages that: compared with the prior art, the utility model provides a metal connecting shell has been add to the structure, through the position relation of adjusting transformer, inductance component and electric capacity subassembly to switch on electric capacity and the laminating of metal connecting shell ingeniously, make electric current evenly pass through electric capacity, avoid it to generate heat or even puncture because of the electric current is concentrated, promoted the stability and the life of circuit, gained good result of use.
Drawings
Fig. 1 is a schematic diagram of a first circuit element configuration for implementing a series resonant circuit in the prior art.
Fig. 2 is a schematic diagram of a second prior art circuit element configuration for implementing a series resonant circuit.
Fig. 3 is a schematic structural diagram of a combination of a structure in which the transformer, the inductor and the capacitor are connected to form series resonance and an external package a according to the present invention.
Fig. 4 is a schematic structural diagram of a structure in which the transformer, the inductor, and the capacitor are connected to form a series resonance in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
referring to fig. 3-4, the utility model provides a structure of a series resonance circuit formed by the connection of a transformer, an inductor and a capacitor, which comprises a transformer component T, a capacitor component C and an inductor component L, wherein the transformer component T, the capacitor component C and the inductor component L are sequentially conducted end to form the series resonance circuit;
the capacitor assembly C comprises a capacitor 1, the capacitor 1 comprises a left polar plate 11, a dielectric medium 12 and a right polar plate 13, the dielectric medium 12 is arranged between the left polar plate 11 and the right polar plate 13, the dielectric medium 12 and the left polar plate 11 are sequentially and fixedly connected in a stacking manner;
the structure also comprises a metal connecting shell B, wherein an accommodating cavity is arranged in the metal connecting shell B, the capacitor component C and the transformer component T are both arranged in the accommodating cavity, and the transformer component T is insulated from the metal connecting shell B; one end of the transformer component T is conducted with the left pole plate 11, the right pole plate 13 is closely attached to and conducted with the side wall of the metal connecting shell B, the inductance component L is arranged outside the metal connecting shell B, one end of the inductance component L is conducted with the metal connecting shell B, and the other end of the inductance component L is conducted with the other end of the transformer component T.
In a series resonance circuit formed by the connection of a transformer, a capacitor and an inductor, the transformer plays a role in converting an external alternating power supply into alternating power with a specified amplitude, the converted alternating power is connected with the capacitor through one end of the transformer, then is conducted with the inductor through the capacitor, and finally is conducted with the other end of the transformer through the inductor to form the series resonance circuit.
Compare with the series resonance circuit in the alternating circuit under traditional high frequency, high pressure, the heavy current environment of being applied to, in the structure, through addding metal connecting shell B, closely laminate electric capacity 1's right polar plate 13 and metal connecting shell B's lateral wall, when the high frequency alternating current after transformer subassembly T transform passes through the form conveying of electric field between electric capacity 1's upper and lower bipolar plate, the electric current will pass through evenly to effectively reduced because of skin effect and adjacent effect electric capacity 1 concentrate the phenomenon that generates heat and then puncture and take place.
The transformer component T comprises a transformer 2, the transformer comprises a primary side 21, a secondary side 22 and a magnetic core 23, the primary side 21 and the secondary side 22 are wound on the magnetic core 23, the primary side 21 is connected with an external power supply, one end of the secondary side 23 is connected with the left pole plate 11, and the other end of the secondary side 22 is connected with an inductance component L. The primary side 21 and the secondary side 22 of the transformer are coupled through the magnetic core 23, and the two ends of the secondary side 22 are respectively connected with the capacitor assembly C and the inductor assembly L, so that the whole transformer 2 can be fixed in the metal connecting shell B in a suspended state, and the insulation between the transformer 2 and the metal connecting shell B is conveniently realized.
A via hole (not shown) is formed in the metal connecting shell B corresponding to the conducting position of the secondary side 22 and the inductor element L, and the secondary side 22 extends out of the via hole and is in conducting connection with the inductor element L.
The transformer assembly T further includes an insulating ring (not shown) which is sleeved on the secondary side 22 and tightly embedded in the via hole to insulate and isolate the secondary side 22 from the metal connection shell B. Transformer 2 when keeping and good switch on between electric capacity subassembly C and the inductance component L, should guarantee with the metal connection shell B between strict insulation, consequently the utility model provides an in the mechanism, transformer component T has still set up the insulating collar, establishes insulating collar cover on secondary 22 to with the inseparable gomphosis of insulating collar in the via hole, make things convenient for secondary 22 to stretch out from the via hole and switch on with inductance component L when, keep transformer 1 and metal connection shell B strict insulation.
The transformer component T further comprises a magnetic core water cooling ring 24 and a magnetic core water cooling pipe (not shown), the magnetic core water cooling ring 24 is tightly attached to the magnetic core, a water cooling cavity is arranged inside the magnetic core water cooling ring 24, and the water cooling cavity is communicated with an external cooling water pipeline through the magnetic core water cooling pipe. The transformer is easy to generate heat under the high-frequency environment, the magnetic core water cooling ring 24 is arranged at the position tightly attached to the magnetic core, and the magnetic core water cooling ring 24 is conducted with external cooling water through the magnetic core water cooling tube, so that the water cooling circulation of the transformer can be effectively realized, and the normal work of the transformer is ensured.
The capacitor component C further comprises a capacitor water cooling sheet 3 and a capacitor water cooling tube 4, the capacitor water cooling tube 4 is connected with the capacitor water cooling sheet 3, the capacitor water cooling sheet 3 is tightly attached to a left electrode plate 11 of the capacitor 1, a water cooling cavity is arranged inside the capacitor water cooling sheet 3, and external cooling water is communicated with the water cooling cavity through the capacitor water cooling tube 4. Although set up metal connecting shell B to hug closely metal connecting shell B with electric capacity 1's right polar plate 13 and evenly pass through electric capacity 1 in order to guarantee the electric current, under the high frequency environment, electric capacity 1 generate heat unavoidably, for guaranteeing electric capacity 1 normal work, and effectively prolong electric capacity 1's life the utility model provides an electric capacity water-cooling piece 3 and electric capacity water-cooling pipe 3 have still been add in the structure, can work under normal temperature environment in order to further guarantee electric capacity 1 through external cooling water.
Inductance components L is including first electrode 5, second electrode 6 and inductance coils 7, and first electrode 5 switches on with metal connecting shell B, second electrode 6 switches on with vice limit 22, and inductance coils 7's both ends are connected with first electrode 5 and second electrode 6 are detachable respectively, and inductance coils 7 switches on with first electrode 5 and second electrode 6 respectively when inductance coils 7's both ends are connected with first electrode 5 and second electrode 6 respectively. Series resonance circuit uses in induction heating device, and inductance coils 7 uses as the heating device at terminal usually, sets up inductance components L into the detachable mode of being connected of inductance coils 7 and first electrode 5 and second electrode 6, makes things convenient for the whole processing of circuit to dispatch from the factory on the one hand, and on the other hand also convenience of customers assembles or maintains, promotes the wholeness ability of product.
The utility model has the advantages that: compared with the prior art, the utility model provides a metal connecting shell has been add to the structure, through the position relation of adjusting transformer, inductance component and electric capacity subassembly to switch on electric capacity and the laminating of metal connecting shell ingeniously, make electric current evenly pass through electric capacity, avoid it to generate heat or even puncture because of the electric current is concentrated, promoted the stability and the life of circuit, gained good result of use.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A structure of a series resonance circuit formed by connecting a transformer, an inductor and a capacitor comprises a transformer component, a capacitor component and an inductor component, wherein the transformer component, the capacitor component and the inductor component are sequentially conducted end to form the series resonance circuit;
the capacitor assembly comprises a power capacitor, the power capacitor comprises a left polar plate, a dielectric medium and a right polar plate, the dielectric medium is arranged between the left polar plate and the right polar plate, the dielectric medium and the left polar plate are sequentially stacked and fixedly connected;
the structure is characterized by also comprising a metal connecting shell, wherein an accommodating cavity is arranged in the metal connecting shell, the capacitor assembly and the transformer assembly are both arranged in the accommodating cavity, and the transformer assembly is insulated from the metal connecting shell; one end of the transformer assembly is conducted with the left pole plate, the right pole plate is tightly attached to and conducted with the side wall of the metal connecting shell, the inductor assembly is arranged outside the metal connecting shell, one end of the inductor assembly is conducted with the metal connecting shell, and the other end of the inductor assembly is conducted with the other end of the transformer assembly.
2. The structure of claim 1, wherein the transformer is a transformer, the transformer includes a primary side, a secondary side, and a magnetic core, the primary side and the secondary side are wound around the magnetic core, the primary side is connected to an external power source, one end of the secondary side is connected to the left plate, and the other end of the secondary side is connected to the inductor component.
3. The transformer according to claim 2, wherein the transformer assembly further comprises a core water cooling ring and a core water cooling tube, the core water cooling ring is disposed adjacent to the core, and a water cooling cavity is disposed inside the core water cooling ring and is in communication with an external cooling water pipeline through the core water cooling tube.
4. The transformer structure of claim 3, wherein the metal connecting shell is provided with a via hole corresponding to a conducting position of the secondary side and the inductance element, and the secondary side extends out of the via hole and is in conduction with the inductance element.
5. The transformer structure of claim 4, wherein the transformer assembly further comprises an insulating ring, the insulating ring is sleeved on the secondary side, and the insulating ring is tightly embedded in the via hole to insulate and isolate the secondary side from the metal connecting shell.
6. The transformer, inductor and capacitor combination structure of claim 1 to form a series resonant circuit, wherein the capacitor assembly further comprises a capacitor water cooling plate and a capacitor water cooling tube, the capacitor water cooling tube is connected with the capacitor water cooling plate, the capacitor water cooling plate is tightly attached to the left and right plates of the capacitor, a water cooling cavity is arranged inside the capacitor water cooling plate, and external cooling water is communicated with the water cooling cavity through the capacitor water cooling tube.
7. The transformer, inductor and capacitor combination as claimed in claim 1, wherein the inductor assembly comprises a first electrode, a second electrode and an inductor coil, the first electrode is electrically connected to the metal connecting shell, the second electrode is electrically connected to the secondary side, two ends of the inductor coil are detachably connected to the first electrode and the second electrode, and the inductor coil is electrically connected to the first electrode and the second electrode when two ends of the inductor coil are connected to the first electrode and the second electrode, respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921405645.8U CN210899097U (en) | 2019-08-27 | 2019-08-27 | Structure for forming series resonance circuit by jointing transformer, capacitor and inductor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921405645.8U CN210899097U (en) | 2019-08-27 | 2019-08-27 | Structure for forming series resonance circuit by jointing transformer, capacitor and inductor |
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| CN210899097U true CN210899097U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429918A (en) * | 2019-08-27 | 2019-11-08 | 深圳市双平电源技术有限公司 | A kind of transformer, capacitor and inductance engage the structure to form series resonance |
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2019
- 2019-08-27 CN CN201921405645.8U patent/CN210899097U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429918A (en) * | 2019-08-27 | 2019-11-08 | 深圳市双平电源技术有限公司 | A kind of transformer, capacitor and inductance engage the structure to form series resonance |
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Effective date of registration: 20211027 Address after: 523000 No. 10, Jinpeng Road, jinfenghuang Industrial Zone, Tangli village, Fenggang town, Dongguan City, Guangdong Province Patentee after: Dongguan double power supply technology Co.,Ltd. Address before: 518000 a1401, No.3 workshop, Tianan Digital Innovation Park, Longcheng Street Central City, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Shuangping Power Technology Co.,Ltd. |
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