CN201392720Y - High-frequency switch power supply transformer - Google Patents
High-frequency switch power supply transformer Download PDFInfo
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- CN201392720Y CN201392720Y CN200820192666U CN200820192666U CN201392720Y CN 201392720 Y CN201392720 Y CN 201392720Y CN 200820192666 U CN200820192666 U CN 200820192666U CN 200820192666 U CN200820192666 U CN 200820192666U CN 201392720 Y CN201392720 Y CN 201392720Y
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- switch power
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- frequency switch
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Abstract
The utility model provides a high-frequency switch power supply transformer which comprises a magnetic core, a framework and coil windings, wherein the magnetic core is made of magnetic core materials used by a switch power supply, and provided with a central column; windows are arranged around the central column; the central column is sheathed with an insulating sleeve which is the framework; the framework is provided with a connecting column; a secondary winding, a secondary insulating layer, an isolating layer, a primary insulating layer and a primary winding are orderly wound on the outer surface of the connecting column from inside to outside; both ends of the connecting column are provided with barrier strips; a primary insulating filling layer and a secondary insulating filling layer are arranged between the barrier strips and the coil windings; and the outlet wire distance of both sides of the framework is larger than the air discharge distance reaching the required isolating voltage under the air condition. The transformer can provide the isolating voltage of 6KV to 10KV between the primary winding and the secondary winding, and has high safety protection levels.
Description
Technical field
The utility model relates to transformer, is specifically related to a kind of high-frequency switch power transformer of high isolation safe protection.
Background technology
In electric power system, Industrial Frequency Transformer commonly used is isolated medium-voltage line and secondary low-voltage circuit, and safety operation is provided.After national standard (GB/T 20840.7-2007) issue, electronic type voltage transformer is applied.Existing electronic type voltage transformer based on capacitance partial pressure; adopt divided the power-frequency voltage that is depressed into 100V with a power frequency high voltage (110KV-500KV) more; while is at the 100V voltage end and be connected to discharging gap; clamper protection as the one-time dividing capacitor puncture voltage; clamp voltage is generally about 6KV, so the isolation voltage of subsequent conditioning circuit need surpass 6KV and just can provide safeguard protection.100V voltage is converted to digital signal through follow-up processing of circuit, handles transmission by merge cells.In this electrical equipment annexation, signalling channel generally adopts optical fiber to connect, and optical fiber carries out electric insulation to high pressure and low-pressure section, but needs working power with the circuit part that dividing potential drop electric capacity connects.Working power general employing dual mode is provided: a kind ofly provide by high pressure dividing potential drop electric capacity, realization is isolated fully with low-voltage circuit, but the power supply of this mode must be pressed with voltage by a high-tension electricity, if once there is not voltage, just do not have supply power voltage yet, the limitation of use is arranged.Another kind of mode is to provide working power with the high pressure connecting circuit by low-pressure section; in this mode; solve the insulation isolation and the error protection of power supply transmitting portions; to prevent high-voltage breakdown high pressure dividing potential drop body; enter the low-voltage circuit part through the power supply transmission channels; and then influence the electric power operation power supply that the back provides power supply, and causing security incident, this just needs the transformer of insulating power supply.
The transformer of insulating power supply commonly used has the power transformer of belt switch and the power transformer of high isolation at present.The ordinary tap power transformer causes class of security protection low because isolation voltage is low, can not meet the demands.Although high power transformer of isolating can overcome the disadvantage of described switching mode power supply transformer, because volume is big, need injecting oil and gas, the cost height is not easy to miniaturization, promotes the use of and influence it.
Summary of the invention
Technical problem to be solved in the utility model is: in order to overcome the deficiencies in the prior art, provide a kind of high-frequency switch power transformer, this transformer can provide the isolation voltage of 6KV～10KV between the primary and secondary winding, the class of safety protection height.
The technical scheme in the invention for solving the technical problem is: a kind of high-frequency switch power transformer comprises magnetic core, skeleton and coil windings; Described magnetic core is made by the used core material of Switching Power Supply; Described magnetic core is provided with center pillar, is provided with window around it; Described center pillar is with insulating case, and insulating case is a skeleton; Described skeleton is provided with joint pin, and what twine successively from inside to outside on its outer surface is secondary winding, secondary insulating barrier, separator, primary insulation layer, elementary winding, and they constitute coil windings; The two ends of described joint pin are provided with washer, and elementary insulation filling layer and secondary insulation filling layer are arranged between washer and described coil windings; The outlet on described skeleton both sides row's distance is issued to the atmospherical discharges distance of required isolation voltage greater than air conditions.
The transformer that the utility model provides compared with prior art mainly contains following advantage:
One. in normal working conditions; the utility model transformer is exactly the switching mode power supply transformer of a transmission energy commonly used; under the situation that primary voltage dividing potential drop body breaks down; the isolation voltage of 6KV～10KV can be provided; and with this isolation voltage bleed off over the ground, and the protection back provides the safety of the electric power operation power supply of power supply.
They are two years old. and adopt special technique for coiling, for example adopt conventional Switching Power Supply magnetic core to make, can reach the required transducing characteristic of high-frequency switch power transformer with the material of routine.
They are three years old. and easy to make.
They are four years old. and the transformer of made has high insulating property, and high-isolation provides safeguard protection completely to primary circuit simultaneously, need not be oil-filled, also non-inflatable, and volume is little and cost is low.
Description of drawings
Fig. 1-1 and Fig. 1-2 are structural representations of the present utility model.
Fig. 2 is a core structure schematic diagram of the present utility model.
Fig. 3 is a skeleton structure schematic diagram of the present utility model.
Fig. 4 is a schematic equivalent circuit of the present utility model.
Fig. 5 is a winding structure schematic diagram of the present utility model.
Among the figure: 1. magnetic core; 2. skeleton; 3. coil windings; 4. the 4th lead-out wire; 5. lead-out wire on first; 6. lead-out wire in first; 7. first time lead-out wire; 8. lead-out wire on the 3rd; 9. the 3rd time lead-out wire; 10. lead-out wire on second; 11. second time lead-out wire; 12. elementary insulation filling layer; 13. primary insulation layer; 14. inferior level insulating barrier; 15. separator; 16. the first elementary winding (N1); 17. feedback winding (N2); 18. first secondary winding (N3); 19. second subprime winding (N4); 20. window; 21. center pillar; 22. inferior level insulation filling layer.
Embodiment
The utility model is described in further detail below in conjunction with example and accompanying drawing.
As Fig. 1-1, Fig. 1-2, Fig. 2 to shown in Figure 5: transformer of the present utility model comprises magnetic core 1, skeleton 2 and coil windings 3.Described magnetic core is made by the used core material of Switching Power Supply.Described magnetic core is provided with center pillar 21, is provided with window 20 around it.Described center pillar 21 is with insulating case, and insulating case is a skeleton 2.Described skeleton 2 also is provided with joint pin, the joint pin center is provided with the hole that matches with magnetic core center pillar 21, what twine successively from inside to outside on the outer surface of joint pin is secondary winding, secondary insulating barrier 14, separator 15, primary insulation layer 13, elementary winding, and they constitute coil windings 3.The two ends of described joint pin are provided with washer, and elementary insulation filling layer 12 and secondary insulation filling layer 22 are arranged between washer and described coil windings 3.The outlet on described skeleton 2 both sides row's distance is issued to the atmospherical discharges distance of required isolation voltage greater than air conditions.
As Fig. 1-1, Fig. 1-2, Fig. 4 and shown in Figure 5, secondary winding comprises winding (N3) 18 and second subprime winding (N4) 19 for the first time, they and on the joint pin of skeleton 2, lead-out wire 5 and first time lead-out wire 7 in the coiling first drawn on both sides respectively, middle coiling and connect after draw lead-out wire 6 in first.
Elementary winding comprises the first elementary winding (N1) 16 and feedback winding (N2) 17.The first elementary winding 16 is drawn lead-out wire 10 and second time lead-out wire 11 on second; Feedback winding 17 is drawn lead-out wire 8 and the 3rd time lead-out wire 9 on the 3rd.
The used core material of described Switching Power Supply can be PQ type, EC type, EE type or EI type.Described elementary winding and secondary winding all can be formed by the litz wire coiling.Described separator 15 can be formed by copper strips coiling outside secondary insulating barrier 14.
The preparation method of described high-frequency switch power transformer comprises:
A. select the size of skeleton 2 earlier according to isolation voltage required between elementary winding and the secondary winding, i.e. the outlet on skeleton 2 both sides row's distance should be issued to the atmospherical discharges distance of required isolation voltage greater than air conditions.And generally select horizontal skeleton for use.
B. behind the selected skeleton 2, be equipped with magnetic core 1 according to transmitting power demand and the used core material of Switching Power Supply again.
C. according to the Switching Power Supply designing requirement, determine the number of turn of elementary winding and secondary winding, and choose the length of corresponding litz wire according to the number of turn of each line bag, whole section litz wire put high-tension insulating bushing, the internal diameter of high-tension insulating bushing is slightly larger than the diameter of litz wire, is convenient to process operation and is not easy again to come off.
D. according to the number of plies of the withstand voltage and required isolation voltage decision insulating barrier of the insulation film of selected insulating barrier, and get 20% surplus more.Insulating barrier comprises primary insulation layer 13 and secondary insulating barrier 14.
E. begin coiling according to following steps:
The coiling of secondary winding: earlier for the first time winding (N3) 18 and second subprime winding (N4) 19 and around and draw three lead-out wires.Winding is positioned in the middle of the skeleton 2, and winding respectively stays 9～11mm space to the baffle plate on skeleton 2 both sides.After winding is finished, add full space with insulating material film in the space on both sides, height is consistent with the winding height, so far finishes secondary insulation filling layer 22.
The coiling of secondary insulating barrier 14: with and the wide insulating material film of skeleton 2, close around the corresponding number of plies on secondary winding and secondary insulation filling layer.
The coiling of separator 15: get earlier than skeleton 2 wide 2mm of lacking and long sheet copper than the long 4～6mm of secondary insulating barrier 14 outer perimeters, the litz wire of welding rated current 1A is as the 4th lead-out wire 4 on copper sheet.Again whole copper sheet is covered with insulating material film, make its whole insulation.Then the 4th lead-out wire 4 is all put bushing, and the separator of making 15 is covered in secondary insulating barrier 14 coilings, fix the 4th lead-out wire 4.
The coiling of primary insulation layer 13: class F insulation layer 14 technology coiling in due order cover on the separator 15.
The coiling of elementary winding: elementary winding is made up of the first elementary winding 16 and feedback winding 17, and they press the coiling of secondary winding technology, and draw four lead-in wires, are wound on the primary insulation layer 13.After elementary winding is finished, add full space with insulating material film in the space on both sides, height is consistent with the winding height, so far finishes elementary insulation filling layer 12.
F. assemble transformer at last, and handle, promptly obtain described high-frequency switch power transformer through fixing, oven dry and dipping lacquer.
In the said method, the used core material of Switching Power Supply can be PQ type, EC type, EE type or EI type, and described litz wire can adopt enamelled wire.Elementary winding and secondary winding all can be formed by the enamelled wire coiling, and the diameter of enamelled wire is selected according to the peak current that flows through.Lead-out wire 6 in the lead-out wire 5, first on described first, first time lead-out wire 7 and the 4th lead-out wire 4 be in skeleton outlet side the same side, and lead-out wire 8 and the 3rd time lead-out wire 9 are at skeleton outlet side opposite side on the lead-out wire 10 on second, second time lead-out wire 11, the 3rd.
The course of work of the present utility model is: the same with general high-frequency switch power transformer operation principle during transformer operate as normal of the present utility model; transmit energy by magnetic field; elementary winding connects protected power end; secondary connection and high voltage have the end that is electrically connected, and separator connects the earth.Under the normal operating conditions, the effect of this transformer: 1. to the secondary energy that provides; 2. isolate being electrically connected of primary and secondary, provide 6KV～10KV power frequency to isolate.3. under the guard mode; this transformer secondary output is punctured by high-voltage electrical apparatus; behind the air discharging protection device; after high residual voltage exceeds the insulation voltage of secondary and separator; puncture insulation; discharge over the ground by separator, protect the elementary electric affected by high that is not subjected to, the electric equipment of protecting elementary winding to link to each other.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.Because under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, obtain the series of products of high-frequency switch power transformer.
Claims (4)
1. a high-frequency switch power transformer comprises magnetic core (1), skeleton (2) and coil windings (3); Described magnetic core is made by the used core material of Switching Power Supply; Described magnetic core is provided with center pillar (21), is provided with window (20) around it; Described center pillar (21) is with insulating case, insulating case is skeleton (2), it is characterized in that: described skeleton (2) is provided with joint pin, what twine successively from inside to outside on its outer surface is secondary winding, secondary insulating barrier (14), separator (15), primary insulation layer (13), elementary winding, and they constitute coil windings (3); The two ends of described joint pin are provided with washer, and elementary insulation filling layer (12) and secondary insulation filling layer (22) are arranged between washer and described coil windings (3); The outlet on described skeleton (2) both sides row's distance is issued to the atmospherical discharges distance of required isolation voltage greater than air conditions.
2. high-frequency switch power transformer according to claim 1 is characterized in that: described secondary winding comprises that secondary winding comprises winding (18) and second subprime winding (19) for the first time; Described elementary winding comprises the first elementary winding (16) and feedback winding (17).
3. high-frequency switch power transformer according to claim 1 is characterized in that: the used core material of described Switching Power Supply is PQ type, EC type, EE type or EI type.
4. high-frequency switch power transformer according to claim 1 is characterized in that: described elementary winding and secondary winding form by the enamelled wire coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820192666U CN201392720Y (en) | 2008-11-20 | 2008-11-20 | High-frequency switch power supply transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820192666U CN201392720Y (en) | 2008-11-20 | 2008-11-20 | High-frequency switch power supply transformer |
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| Publication Number | Publication Date |
|---|---|
| CN201392720Y true CN201392720Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200820192666U Expired - Fee Related CN201392720Y (en) | 2008-11-20 | 2008-11-20 | High-frequency switch power supply transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794665A (en) * | 2010-04-02 | 2010-08-04 | 江苏泰昌电子有限公司 | Groove-splitting high-frequency switch power transformer |
| CN101521095B (en) * | 2008-11-20 | 2011-07-20 | 武汉长江通信产业集团股份有限公司 | Preparation method of high frequency switching mode power supply transformer |
| CN106229122A (en) * | 2016-09-07 | 2016-12-14 | 中国科学院合肥物质科学研究院 | A kind of high-frequency isolation transformer |
| CN108682545A (en) * | 2018-07-04 | 2018-10-19 | 浙江和兴电子有限公司 | A kind of high voltage bearing multiwinding transformer |
-
2008
- 2008-11-20 CN CN200820192666U patent/CN201392720Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521095B (en) * | 2008-11-20 | 2011-07-20 | 武汉长江通信产业集团股份有限公司 | Preparation method of high frequency switching mode power supply transformer |
| CN101794665A (en) * | 2010-04-02 | 2010-08-04 | 江苏泰昌电子有限公司 | Groove-splitting high-frequency switch power transformer |
| CN106229122A (en) * | 2016-09-07 | 2016-12-14 | 中国科学院合肥物质科学研究院 | A kind of high-frequency isolation transformer |
| CN108682545A (en) * | 2018-07-04 | 2018-10-19 | 浙江和兴电子有限公司 | A kind of high voltage bearing multiwinding transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20161120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |