EP3841599A1 - Vorrichtung zur reduzierung hochfrequenter störungen eines transformators - Google Patents
Vorrichtung zur reduzierung hochfrequenter störungen eines transformatorsInfo
- Publication number
- EP3841599A1 EP3841599A1 EP19758670.4A EP19758670A EP3841599A1 EP 3841599 A1 EP3841599 A1 EP 3841599A1 EP 19758670 A EP19758670 A EP 19758670A EP 3841599 A1 EP3841599 A1 EP 3841599A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- core
- reference potential
- shield
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 129
- 239000011888 foil Substances 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/289—Shielding with auxiliary windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
Definitions
- the invention relates to a device for reducing high-frequency interference between a first winding and a second winding of a transformer, which are wound around a common core.
- a shield winding is used for this.
- DE3601475 A1 is concerned with a transformer which is simple to manufacture and has a high degree of asymmetry damping.
- the one Shield winding suggests two windings applied at the same time, the start of the first winding and the end of the second winding being connected to the reference potential of an asymmetrically operated winding, while the end of the first winding and the beginning of the second winding remain unconnected.
- DE 2832715 A1 discloses a typical arrangement of an isolation transformer with an earthed shield to avoid leakage currents.
- the primary side is connected to the mains, the secondary side feeds the device and is surrounded by a grounded shield or at least covered from the primary side. This means that leakage currents are intercepted from the primary side of the shield without reaching the device.
- a device for reducing high-frequency interference between a first winding and a second winding of a transformer, which are wound around a common core is therefore provided. struck, the first winding being an interference-emitting winding and a shielding winding or a shielding film being arranged between the first winding and the second winding. Furthermore, the first winding being an interference-emitting winding and a shielding winding or a shielding film being arranged between the first winding and the second winding. Furthermore, the first winding being an interference-emitting winding and a shielding winding or a shielding film being arranged between the first winding and the second winding. Furthermore, the first winding being an interference-emitting winding and a shielding winding or a shielding film being arranged between the first winding and the second winding. Furthermore, the first winding being an interference-emitting winding and a shielding winding or a shielding film being arranged between the first winding and the second winding. Furthermore, the first wind
- Shield winding and the core connected to the reference potential of the first winding.
- the shield winding and the core of the transformer are in this way at the same electrical reference potential, namely preferably the ground potential of the first winding, which emits the high-frequency interference.
- the shield winding and the core are connected on one side to the reference potential of the first winding.
- the device according to the invention is designed in such a way that the reference potential is the ground potential of the first winding.
- an embodiment is favorable in which the shield winding is coupled to the first winding via a capacitance C p si.
- the device is preferably also designed such that the core is coupled to the first winding via a capacitance C pKi .
- the core is coupled to the second winding via a capacitance C pK 2.
- the shield winding is coupled to the second winding via a capacitance C pS 2.
- the high-frequency interference is fed back directly to the interference source without spreading on the second winding to be shielded.
- a shield winding is used without simultaneously bringing the core to the reference potential, some of the interference can be conducted to the shield winding and then to ground via the capacitance C pSi , but the core becomes the potential of the interference-emitting first due to the parasitic capacitance C pKi Accept winding.
- These disturbances are in turn passed through the capacitance C pK 2 to the second winding to be shielded.
- the core is connected to the reference potential of the first winding by a direct galvanic connection by means of a connecting wire.
- the core is connected to the reference potential of the first winding by a capacitive connection by means of a conductive film which is arranged on a side surface of the core.
- a further advantageous embodiment variant provides that the core is connected to the reference potential of the first winding by means of a contact spring.
- connection to the reference potential of the first winding is preferably made directly to a ground pin of the transformer.
- the shield winding is a single-layer, insulated wire winding.
- the device according to the invention is trained that when using a screen film, this screen film is a single-layer, electrically conductive film.
- the second winding is a winding layer around the first winding and the shield winding or the shielding foil is sandwiched between the first winding and the second winding around the first winding.
- 1 is an equivalent circuit diagram of a device for reducing high-frequency interference of a transformer
- Fig. 4 shows a section through the side view of the core with the three
- FIG. 5 shows a perspective view of the connection of the core to the reference potential by means of a conductive film
- FIG. 6 shows a side view of the connection of the core to the reference potential by means of a connecting wire
- Fig. 7 is a side view of the connection of the core to the reference potential by means of a contact spring.
- FIGS. 1 to 7 an exemplary embodiment described, wherein the same reference numerals indicate the same structural and / or functional features.
- FIG. 1 shows an equivalent circuit diagram of a device for reducing high-frequency interference in a transformer 1.
- the first winding Wi and the second winding W 2 of the transformer 1 are wound around the common core 2.
- the first winding Wi is the interference-emitting winding and there is a voltage U1.
- the reference potential B is the ground potential of the first winding Wi.
- the voltage U2 is generated in the second winding W 2 .
- a shield winding W s or a shielding foil W s is arranged between the first winding Wi and the second winding W 2 and is connected on one side to the reference potential B of the first winding Wi.
- the common core 2 is also connected on one side to the reference potential B.
- FIG. 2 shows a perspective view of an embodiment variant of a core 2 of the transformer 1.
- the cuboid core 2 has two rectangular passage openings along its longitudinal extension, which extend parallel along the longitudinal extension of the core 2. In this way, a web 3 is formed centrally in the core 2 for wrapping the core 2 with a corresponding winding through the passage openings.
- FIG. 3 shows a section through the top view of the core 2 with the three windings Wi, W 2 , W 3.
- the web 3 of the core 2 of the transformer 1 from FIG. 2 is wrapped with the three windings Wi, W 2 , W s , that the second winding W 2 represents a winding layer around the first winding and the shield winding W s or the shield foil W s is sandwiched between the first winding Wi and the second winding W 2 around the first winding Wi.
- the windings Wi, W 2 , Ws are single-ply.
- FIG. 4 is a section through the side view of the core 2, with the Windings Wi, W 2 , W s is shown.
- the shield winding W s is electrically connected to the first winding W 1 via a capacitance C p si.
- the core 2 is coupled to the first winding Wi via a capacitance C pKi and to the second winding W 2 via a capacitance C p «2.
- FIG. 4 also shows that the shield winding W s is likewise coupled to the second winding W 2 via a capacitance C pS 2.
- FIG. 5 is a perspective view of the connection of the core 2 to the reference potential B of the first winding Wi through a capacitive connection by means of a conductive film 11 arranged on a side surface of the core 2.
- FIG. 6 shows a side view of the connection of the core 2 to the reference potential B of the first winding Wi by a direct galvanic connection using a connecting wire 12.
- FIG. 7 also shows a side view of the connection of the core 2 to the reference potential B by means of a contact spring 10.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018120181.8A DE102018120181A1 (de) | 2018-08-20 | 2018-08-20 | Vorrichtung zur Reduzierung hochfrequenter Störungen eines Transformators |
PCT/EP2019/072233 WO2020038923A1 (de) | 2018-08-20 | 2019-08-20 | Vorrichtung zur reduzierung hochfrequenter störungen eines transformators |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3841599A1 true EP3841599A1 (de) | 2021-06-30 |
Family
ID=67742391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19758670.4A Pending EP3841599A1 (de) | 2018-08-20 | 2019-08-20 | Vorrichtung zur reduzierung hochfrequenter störungen eines transformators |
Country Status (5)
Country | Link |
---|---|
US (1) | US11996228B2 (de) |
EP (1) | EP3841599A1 (de) |
CN (1) | CN209785725U (de) |
DE (1) | DE102018120181A1 (de) |
WO (1) | WO2020038923A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111902895A (zh) * | 2018-08-06 | 2020-11-06 | 谷歌有限责任公司 | 屏蔽式电力变压器 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2389209A1 (fr) * | 1977-04-29 | 1978-11-24 | Orega Electro Mecanique | Transformateur muni d'ecrans electrostatiques entre ses enroulements primaires et secondaires |
DE2832715A1 (de) | 1978-07-26 | 1980-02-07 | Sigdell Jan Erik Dr | Aktiver isolationstransformator |
DE3601475A1 (de) | 1986-01-20 | 1987-07-23 | Telefonbau & Normalzeit Gmbh | Uebertrager |
DE3940025A1 (de) * | 1989-12-04 | 1991-06-06 | Michael Riedel Transformatoren | Abschirmwicklung fuer transformatoren aus magnetisierbarem material |
EP1323228A4 (de) * | 2000-09-15 | 2008-03-05 | Radian Res Inc | Reduktion von kapazitätseffekten in potentialtransformatoren |
US6982621B2 (en) * | 2003-04-01 | 2006-01-03 | Power Integrations, Inc. | Method and apparatus for substantially reducing electrical displacement current flow between input and output windings of an energy transfer element |
US7868724B2 (en) * | 2006-01-25 | 2011-01-11 | Delta Electronics, Inc. | Method for suppressing common mode noise |
EP2428967B1 (de) * | 2010-09-08 | 2013-04-17 | ABB Technology AG | Transformatorwicklung |
WO2014178589A1 (ko) * | 2013-05-02 | 2014-11-06 | Park Chan Woong | 자기에너지전달소자 및 전원장치 |
KR101665582B1 (ko) * | 2015-03-03 | 2016-10-12 | 경상대학교산학협력단 | 트랜스포머 및 이를 포함하는 컨버터 |
-
2018
- 2018-08-20 DE DE102018120181.8A patent/DE102018120181A1/de active Pending
- 2018-10-17 CN CN201821683800.8U patent/CN209785725U/zh active Active
-
2019
- 2019-08-20 WO PCT/EP2019/072233 patent/WO2020038923A1/de unknown
- 2019-08-20 US US17/268,974 patent/US11996228B2/en active Active
- 2019-08-20 EP EP19758670.4A patent/EP3841599A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210327643A1 (en) | 2021-10-21 |
US11996228B2 (en) | 2024-05-28 |
CN209785725U (zh) | 2019-12-13 |
WO2020038923A1 (de) | 2020-02-27 |
DE102018120181A1 (de) | 2020-03-05 |
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