CN1372278A - High-frequency power transformer with primary and secondary winding all cross structure and its making method - Google Patents
High-frequency power transformer with primary and secondary winding all cross structure and its making method Download PDFInfo
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- CN1372278A CN1372278A CN 01110984 CN01110984A CN1372278A CN 1372278 A CN1372278 A CN 1372278A CN 01110984 CN01110984 CN 01110984 CN 01110984 A CN01110984 A CN 01110984A CN 1372278 A CN1372278 A CN 1372278A
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Abstract
This invention relates to a high frequency power transformer with a primary and secondary winding whole cross structure overcoming the shortage existing in the traditional high frequency power transformer with complex structure and difficult production, containing a primary winding a secondary winding and a frame. The primary winding is composed of multi-section copper foil arranged in parallel. At the both ends of each section copper foil of the primary winding, the extensino line is set. Afler overlapping with the secondary winding which is a single section copper foil, the primary together which the secondary insulated in between with a insuiatino layer, will be winded to the frame. The extension line at both ends of each section copper foil of the primary will make each section copper foil of the primary edge wind in parallel with a suitable way with a method to be provided.
Description
The present invention relates to a kind of transformer, relate in particular to the high-frequency power transformer with primary and secondary winding all cross structure, this transformer generally is applied in the HF switch power inverter.The invention still further relates to the above-mentioned method made from high-frequency power transformer of all cross structure.
Along with the development of HF power conversion technology, the operating frequency of switching power converter is more and more higher, and as a vitals of switching power converter, power transformer is very big to the performance index influence of integral transformation device.The leakage inductance of winding and resistance are the important performance indexes of high-frequency power transformer, because the leakage inductance of transformer will cause energy loss, the due to voltage spikes of switching device causes the damage of switching device or the increase of switching loss.The winding resistance of transformer can influence the effciency of energy transfer of transformer, thereby makes the whole efficiency of converter descend.Therefore the leakage inductance and the AC resistance that how to reduce Transformer Winding are the key technologies of design of transformer and manufacturing.
Adopt former secondary winding interlaced arrangement technology can reduce the leakage inductance and the A.C.power loss of Transformer Winding effectively.The leakage inductance of transformer is to be produced by the leakage flux of transformer.Take the former secondary cross structure of winding can reduce the leakage flux of transformer, thereby reach the purpose that reduces leakage inductance.The AC resistance loss of winding mainly belongs to two principal elements, i.e. skin effect and proximity effect, these two kinds of effects all make the AC resistance of winding increase.And the winding interleaving technique can reduce the degree of proximity effect, thereby reduces the AC resistance of Transformer Winding, reaches the purpose of the A.C.power loss that reduces winding.
But, realize the complex manufacturing technology of the transformer of winding interlaced arrangement at present.For high-frequency power transformer, in order to reduce the influence of high frequency skin effect, the material of Transformer Winding is general to adopt very thin enamelled wire or rope-lay strand (promptly line) now.Usually adopt enamelled wire for the less one side of electric current (as former limit), adopt Copper Foil for one side that electric current is bigger.
The arrangement of high-frequency power transformer winding has following three kinds at present: (1) former secondary winding lap winding type structure.On skeleton 103 around secondary Copper Foil winding 101, and then repeatedly around the former limit of last enamelled wire winding 102.Its as shown in Figure 1, the technique for coiling of this method transformer is fairly simple, but owing to there be not the staggered of former secondary winding, the high-frequency ac loss ratio of the leakage inductance of transformer and winding is bigger.(2) former secondary winding sandwich structure.Its as shown in Figure 2, promptly former limit winding 202 is clipped in the middle secondary winding 201, the technique for coiling relative complex of this method transformer, the leakage inductance of transformer and A.C.power loss reduce than first kind.(3) former secondary winding cross structure.Its as shown in Figure 3, the 301 staggered coilings of former limit winding 302 and secondary winding, i.e. the former limit of one deck winding 302, one deck secondary winding 201, secondary winding and former limit winding are interlaced stacking.The more preceding two kinds of methods of the leakage inductance of the transformer of this structure and the A.C.power loss of winding are all little.
Though adopt the third winding arrangement, the better performances of transformer, it still has following shortcoming: the technique for coiling complexity of (1) Transformer Winding.Especially secondary Copper Foil winding will stride across former limit winding, technology more complicated and difficulty when making.And former limit winding can not adopt the Copper Foil coiling, can only adopt enamelled wire, and the conductor utilance of enamelled wire is lower than Copper Foil, thereby reduced the conductor utilance of winding window.
Therefore, the object of the present invention is to provide the high-frequency power transformer of the little primary and secondary winding all cross structure of simple and leakage inductance of a kind of structure and technology and AC resistance.
Another object of the present invention is to provide a kind of method of making the high-frequency power transformer of above-mentioned primary and secondary winding all cross structure, and the technology of this manufacture method is simple, and the leakage inductance and the AC resistance of the high-frequency power transformer of making shaping are little.
According to above-mentioned purpose of the present invention, high-frequency power transformer with primary and secondary winding all cross structure provided by the invention comprises former limit winding, secondary winding and skeleton, described former limit winding constitutes for being arranged in parallel by the multistage Copper Foil, is provided with lead-out wire two sections of every section Copper Foil of described former limit winding; Described secondary winding is the single hop Copper Foil, described former limit winding and described secondary winding mutually repeatedly after, coiling is provided with insulating barrier between described former limit winding and the described secondary winding to described skeleton.
According to another object of the present invention, the present invention also provides a kind of method of making the above-mentioned high-frequency power transformer with all cross structure, comprises following making step:
One layer insulating, one deck secondary Copper Foil, a layer insulating coincided successively with the former limit of one deck Copper Foil be in the same place, form the winding integrated winding of former secondary; Described secondary Copper Foil is a single segment structure, forms the secondary winding, and described former limit Copper Foil is a multi-segment structure, is arranged in parallel between the multistage Copper Foil, forms former limit winding;
The winding technique that the described former secondary of making in the superincumbent step is winding integrated is to skeleton.
As mentioned above, because the former secondary winding of high-frequency converter of the present invention is realized cmpletely staggered, thereby reduce the leakage inductance of transformer and the high-frequency ac resistance of winding to greatest extent, improve transformer efficiency, the winding window utilance of magnetic core that also improved transformer.And, make that the technique for coiling of winding of transformer is simple because the former secondary winding of transformer is to be made into an integral body in advance, be suitable for scale and automated production.
Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing, further feature of the present invention, advantage and effect will become more obvious by the following detailed description to embodiment.
In the accompanying drawing:
Fig. 1 to Fig. 3 shows the schematic diagram of three kinds of structures of traditional high-frequency power transformer;
Fig. 4 is used to explain the structure of high-frequency power transformer of the present invention and the perspective exploded view of manufacture method;
Fig. 5 and Fig. 6 show the structural representation after the former limit winding of high-frequency power transformer and secondary winding are superimposed into integrated winding;
The integrated former secondary winding that Fig. 7 shows high-frequency power transformer coiling 3 circle backs on skeleton form former limit 9 circles, and the turn ratio of secondary 3 circles is the structural representation that 3 Transformer Winding is arranged.
Fig. 8 shows the connected mode schematic diagram of the lead-out wire of winding construction shown in Figure 5.
Principal character of the present invention is that secondary winding and former limit winding can adopt Copper Foil to make.As shown in Figure 4, the secondary winding 401 of the high-frequency power transformer of present embodiment adopts the single hop Copper Foil, and former limit winding 402 adopts the multistage Copper Foil.In the present embodiment, former limit winding 402 has adopted three sections Copper Foils.Obviously, should be appreciated that the described multistage here is not limited in 3 sections.The hop count of former limit winding 402 can be determined according to the voltage transmission ratio of needed transformer.For example, if the voltage transmission of transformer ratio is 3: 1, the former limit winding that constitutes by 3 sections Copper Foils that can adopt as present embodiment.
Structure between former limit winding 402 and the secondary winding 401 as shown in Figure 5 and Figure 6, three sections former limit winding Copper Foil 402A, 402B and 402C arrange coequally, preferably, these three sections Copper Foil 402A-402C equally spaced are arranged in parallel.As shown in Figure 6, be provided with a layer insulating 403 between former limit winding 402 and the secondary winding 401, to guarantee insulation reliably between former limit winding 402 and the secondary winding 401.As shown in Figure 5, the two ends of every section Copper Foil of former limit winding 402 all are provided with lead-out wire 402W.Equally, also be provided with lead-out wire at the two ends of the Copper Foil of secondary winding 401.As shown in Figure 4, after the former secondary winding technique of making one is to the skeleton 404, the lead-out wire 401W of the lead-out wire 402W of the multistage Copper Foil of former limit winding 402 and secondary winding 401 is connected on the pin 404F of skeleton 404, as output.Simultaneously, connecting between the two ends lead-out wire 402W of each section Copper Foil of former limit winding 402, make between these copper foil section to be serially connected.Connection between the two ends lead-out wire 402W of each section Copper Foil of former limit winding 402 can be not yet pin by skeleton connect, and on skeleton, directly connect.
Connected mode described in the embodiment in the above, at length, for the winding construction of Fig. 5, connected mode such as Fig. 8 of its lead-out wire show.The two ends 500A of secondary Copper Foil and 500B become two exits of transformer secondary winding.If the lead-out wire of first section Copper Foil A of former limit winding is 501A, another lead-out wire is 501B, and the lead-out wire of second section Copper Foil B is 502A, and another lead-out wire is 502B, the lead-out wire of the 3rd section Copper Foil C is 503A, and another lead-out wire is 503B.501A, 502A and 503A are end of the same name.Then 501B is connected with 502A, 502B is connected with 503A.501A and 503B become final two exits of the former limit of transformer winding.
The width and the thickness of the former limit winding 402 of high-frequency power transformer of the present invention and the Copper Foil of secondary winding 401 can be definite like this: according to the current effective value (operating frequency and the operating current that are high-frequency power transformer are determined) that the operating frequency and the transformer of practical power device switching device will pass through, determine according to conventional design principle and laboratory facilities.
The method of making high-frequency power transformer with all cross structure of the present invention shown in Figure 4 is as follows:
One layer insulating 403, one deck secondary Copper Foil 401, a layer insulating 403 coincided successively with the former limit of one deck Copper Foil 402 be in the same place, form the winding integrated winding of former secondary; The secondary Copper Foil is a single segment structure, forms the secondary winding, and described former limit Copper Foil is a multi-segment structure, is arranged in parallel between the multistage Copper Foil, forms former limit winding;
The winding technique that the former secondary of making in the superincumbent step is winding integrated is to skeleton 404;
The lead-out wire of former limit winding Copper Foil for example can connect by the pin of skeleton or directly connect in skeleton by suitably connecting, and makes each circle of former limit winding become to be connected in series;
The final exit of former limit winding and secondary winding is connected on the pin 404F of skeleton.
In the above embodiments, the winding of former secondary one can be on skeleton coiling one deck, also can the coiling multilayer, the number of plies of coiling can come to determine as required.Figure 7 illustrates the structural representation of two layers of coilings.Certainly, for clear and for simplicity, not shown insulating barrier in Fig. 7, but should be appreciated that between former limit winding and secondary winding and all be provided with insulating barrier.
In another embodiment of the present invention, can replace above-mentioned Copper Foil and insulating barrier with the banded flexible printed circuit board (MFB) that two-layer or multilayer conductive layer are arranged, as former limit winding and secondary winding.One deck conductive layer in the banded flexible printed circuit board is the single hop conductive layer, and as the secondary winding, another adjacent layer is the multistage conductive layer, as former limit winding.Therefore, the banded flexible printed circuit board of this structure just becomes above-mentioned incorporate former secondary winding.Winding method subsequently is then same as described above.
Because the former secondary winding of high-frequency power transformer of the present invention is what to make with the one coiling in advance, the Copper Foil of its secondary winding is an integral body, does not need to be cut to be divided into a lot of parts.The Copper Foil of former limit winding is divided into multistage, but each section self is an integral body, only need between the multistage to connect, so their junction is fewer.And because the number of turn of former limit winding is many, the electric current that flows through is little, is therefore relatively connecting between the Copper Foil of former limit winding and is being connected between the Copper Foil of secondary winding, and the connection on the winding of former limit has significantly reduced technologic difficulty.
Describe specific embodiments of the invention above in detail.But should be appreciated that embodiments of the present invention are not limited in these embodiment, the description of these embodiment only is used for helping to understand spirit of the present invention.Under disclosed spirit, to the various variation examples that the present invention did, all should be within the scope of the present invention.Scope of patent protection of the present invention should be limited by appending claims.
Claims (14)
1, a kind of high-frequency power transformer with primary and secondary winding all cross structure comprises former limit winding, secondary winding and skeleton, it is characterized in that, described former limit winding constitutes for being arranged in parallel by the multistage Copper Foil, is provided with lead-out wire two sections of every section Copper Foil of described former limit winding; Described secondary winding is the single hop Copper Foil, described former limit winding and described secondary winding mutually repeatedly after, coiling is to described skeleton, be provided with insulating barrier between described former limit winding and the described secondary winding, each section Copper Foil series connection that the lead-out wire of described former limit winding Copper Foil is connected and makes former limit winding, the final lead-out wire of described former limit winding and described secondary winding is connected on the pin of described skeleton.
2, high-frequency power transformer as claimed in claim 1 is characterized in that, the hop count of described former limit winding is determined according to the voltage transmission ratio of needed transformer.
3, high-frequency power transformer as claimed in claim 1 or 2 is characterized in that, the multistage Copper Foil of described former limit winding equally spaced is arranged in parallel.
4, high-frequency power transformer as claimed in claim 1 is characterized in that, the width of the Copper Foil of described former limit winding and described secondary winding and thickness are determined according to the operating frequency and the operating current of described high-frequency power transformer.
5, high-frequency power transformer as claimed in claim 1 is characterized in that, described former limit winding and described secondary winding adopt the banded flexible printed circuit board with two-layer or multilayer conductive layer.
6, high-frequency power transformer as claimed in claim 1 is characterized in that, the lead-out wire of described former limit winding Copper Foil makes each circle of former limit winding become to be connected in series by the pin connection of skeleton.
7, high-frequency power transformer as claimed in claim 1 is characterized in that, the lead-out wire of described former limit winding Copper Foil makes each circle of former limit winding become to be connected in series by directly connecting in skeleton.
8, a kind of making comprises following making step as the described method with high-frequency power transformer of all cross structure of claim 1 to 7:
One layer insulating, one deck secondary Copper Foil, a layer insulating coincided successively with the former limit of one deck Copper Foil be in the same place, form the winding integrated winding of former secondary; Described secondary Copper Foil is a single segment structure, forms the secondary winding, and described former limit Copper Foil is a multi-segment structure, is arranged in parallel between the multistage Copper Foil, forms former limit winding;
The winding technique that the described former secondary of making in the superincumbent step is winding integrated is to skeleton;
The two ends lead-out wire of described former limit each section of winding Copper Foil is connected, and makes each section Copper Foil of former limit winding become series connection;
The final lead-out wire of described former limit winding and described secondary winding is connected on the pin of described skeleton.
9, the manufacture method of high-frequency power transformer as claimed in claim 8 is characterized in that, the hop count of described former limit winding is determined according to the voltage transmission ratio of needed transformer.
10, the manufacture method of high-frequency power transformer as claimed in claim 8 or 9 is characterized in that the multistage Copper Foil of described former limit winding equally spaced is arranged in parallel.
11, the manufacture method of high-frequency power transformer as claimed in claim 8 is characterized in that, the width of the Copper Foil of described former limit winding and described secondary winding and thickness are determined according to the operating frequency and the operating current of described high-frequency power transformer.
12, the manufacture method of high-frequency power transformer as claimed in claim 8 is characterized in that, described former limit winding and described secondary winding adopt the banded flexible printed circuit board with two-layer or multilayer conductive layer.
13, the manufacture method of high-frequency power transformer as claimed in claim 8 is characterized in that, the lead-out wire of described former limit each section of winding Copper Foil makes each circle of former limit winding become to be connected in series by the pin connection of skeleton.
14, the manufacture method of high-frequency power transformer as claimed in claim 8 is characterized in that, the lead-out wire of described former limit each section of winding Copper Foil makes each circle of former limit winding become to be connected in series by directly connecting in skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110984 CN1218332C (en) | 2001-02-28 | 2001-02-28 | High-frequency power transformer with primary and secondary winding all cross structure and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110984 CN1218332C (en) | 2001-02-28 | 2001-02-28 | High-frequency power transformer with primary and secondary winding all cross structure and its making method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1372278A true CN1372278A (en) | 2002-10-02 |
| CN1218332C CN1218332C (en) | 2005-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01110984 Expired - Lifetime CN1218332C (en) | 2001-02-28 | 2001-02-28 | High-frequency power transformer with primary and secondary winding all cross structure and its making method |
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| CN (1) | CN1218332C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568783A (en) * | 2012-01-20 | 2012-07-11 | 张家港市华为电子有限公司 | Coil winding structure of large-power push-pull transformer |
| CN103986343A (en) * | 2014-05-30 | 2014-08-13 | 江苏容天机电科技有限公司 | High-power intermediate-frequency sectional type high-voltage rectifier transformer |
| CN106158286A (en) * | 2015-04-27 | 2016-11-23 | 台达电子工业股份有限公司 | The centre tapped transformator of a kind of band |
| CN112002536A (en) * | 2020-08-24 | 2020-11-27 | 黑龙江大学 | Low-distribution capacitance layout method for primary winding of high-frequency integrated transformer |
| CN113555196A (en) * | 2018-11-02 | 2021-10-26 | 台达电子企业管理（上海）有限公司 | Transformer module and power module |
| US11450480B2 (en) | 2018-11-02 | 2022-09-20 | Delta Electronics (Shanghai) Co., Ltd. | Transformer module and power module |
| CN116612960A (en) * | 2023-07-21 | 2023-08-18 | 深圳平创半导体有限公司 | LLC magnetic integration high-frequency transformer |
-
2001
- 2001-02-28 CN CN 01110984 patent/CN1218332C/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568783A (en) * | 2012-01-20 | 2012-07-11 | 张家港市华为电子有限公司 | Coil winding structure of large-power push-pull transformer |
| CN103986343A (en) * | 2014-05-30 | 2014-08-13 | 江苏容天机电科技有限公司 | High-power intermediate-frequency sectional type high-voltage rectifier transformer |
| CN103986343B (en) * | 2014-05-30 | 2016-09-07 | 江苏容天机电科技有限公司 | High-power intermediate frequency segmented high-voltage rectifying transformer |
| CN106158286A (en) * | 2015-04-27 | 2016-11-23 | 台达电子工业股份有限公司 | The centre tapped transformator of a kind of band |
| CN106158286B (en) * | 2015-04-27 | 2018-04-10 | 台达电子工业股份有限公司 | One kind is with centre tapped transformer |
| CN113555196A (en) * | 2018-11-02 | 2021-10-26 | 台达电子企业管理（上海）有限公司 | Transformer module and power module |
| US11450480B2 (en) | 2018-11-02 | 2022-09-20 | Delta Electronics (Shanghai) Co., Ltd. | Transformer module and power module |
| CN112002536A (en) * | 2020-08-24 | 2020-11-27 | 黑龙江大学 | Low-distribution capacitance layout method for primary winding of high-frequency integrated transformer |
| CN112002536B (en) * | 2020-08-24 | 2024-02-27 | 黑龙江大学 | Low-distributed capacitance layout method for primary winding of high-frequency integrated transformer |
| CN116612960A (en) * | 2023-07-21 | 2023-08-18 | 深圳平创半导体有限公司 | LLC magnetic integration high-frequency transformer |
| CN116612960B (en) * | 2023-07-21 | 2023-12-12 | 深圳平创半导体有限公司 | LLC magnetic integration high-frequency transformer |
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| Publication number | Publication date |
|---|---|
| CN1218332C (en) | 2005-09-07 |
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Granted publication date: 20050907 |