EP1199730A2 - Transformator für hohe Betriebsfrequenz und Leistung - Google Patents
Transformator für hohe Betriebsfrequenz und Leistung Download PDFInfo
- Publication number
- EP1199730A2 EP1199730A2 EP01124152A EP01124152A EP1199730A2 EP 1199730 A2 EP1199730 A2 EP 1199730A2 EP 01124152 A EP01124152 A EP 01124152A EP 01124152 A EP01124152 A EP 01124152A EP 1199730 A2 EP1199730 A2 EP 1199730A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transformer
- core parts
- primary
- transformer according
- secondary winding
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
-
- 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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
Definitions
- the invention relates to a transformer for high operating frequency and performance.
- the transformer should meet high requirements the insulation between the primary and secondary side fulfill.
- Transformers with a substantially higher than the mains frequency operating frequency are mainly for so-called Switching power supplies with relatively low insulation requirements and small services.
- Transformers with coaxial windings show a lot small leakage inductances and only have small magnetizing currents, however require special measures for mutual Isolation of the windings and are technological consuming.
- the invention has for its object a transformer of the type mentioned at the beginning, the technical and economical is advantageously realizable, which in terms of its weight and volume clearly from previous solutions takes off and the high insulation requirements between Primary and secondary side fulfilled.
- the magnetic circuit of the transformer consists a primary and a secondary winding carrying first core parts.
- first core parts about other core parts and at least two, one electrical insulation between the primary and secondary side of the transformer causing isolators is the magnetic one Circle closed, the first and the others Core parts are designed so that in the first core parts there is a higher flux density than in the other core parts.
- the starting point of the invention is the knowledge that for one transformer operated with self-commutated converters minimizing the leakage inductance and the magnetizing current withdraw from the aforementioned requirements can.
- Another advantage is that the transformer from a few, clearly functionally separated, individually optimizable Parts can be put together.
- the magnetic circuit of the transformer shown in Fig. 1 consists of three different parts that are multiple magnetic are connected in series.
- Task of a concentrator 1 is a very homogeneous field of very high flux density to create.
- the concentrator 1 is therefore the simplest Case a rectangular rod made of soft magnetic material with a very high permissible flux density - preferably of amorphous Metal.
- a concentrator 1 is on the primary and secondary side intended.
- the magnetic field is generated by a concentrator 1 starting from a further core part, here called diffuser 2, forwarded.
- the task of the diffuser 2 is outside the concentrator 1 the magnetic flux density as far reduce that spatial areas of low permeability as little impact as possible in the rest of the magnetic circuit to have. These areas are especially the areas isolation points between primary and secondary side, realized by an isolator 3, and inevitable Air gaps at joints.
- B. Quadruple compared to concentrator 1 can be enlarged, in particular ferrite materials use. Due to this degree of freedom in the choice of materials there are significant advantages in terms of weight, costs and the simple material processing compared to e.g. B. amorphous Metals.
- the task of the insulator 3 is the electrical separation of the primary and secondary sides of the transformer. In the simplest case, it therefore consists of a plate of suitable insulation material. Since - in contrast to conventional transformers - there are no requirements with regard to the thermal conductivity of the insulation material, materials with extremely high dielectric strength and a low dielectric constant can be used. In order to extend the creepage distances of the insulation paths, the known measures such as groove structures, edge structures with walls, webs etc. can be applied to the insulators 3. An advantageous development of the invention is to connect the diffusers 2 and the insulators 3 several times in series in the magnetic circuit and / or to combine them constructively, see FIG. 3. The effect of the diffuser 2 can thereby be further improved with extremely low weight gain.
- a firm assembly of the diffusers 2 and the isolators 3 - z. B. by gluing under vacuum and pressure - can also be advantageous and improve the insulation ability.
- Another advantage of the arrangement is the fact that the interfaces between the concentrators 1 and the Diffusers 2 neither in terms of mechanical precision nor electrical insulation are critical. Therefore can these as mechanical separation points to simplify assembly / disassembly remain. This also allows the winding 4 prefabricated slide onto the concentrator 1 what facilitates the manufacture of a winding 4 with a high copper fill factor.
- the cooling of the arrangement can, because of the unique electrical Separation of the primary and secondary side, for both Pages can be chosen completely separately. It can be both the soft magnetic components (concentrators 1 and Diffusers 2) and the windings 4 are advantageously cooled be because they are easily accessible and not by z. B. by thick Insulations or potting compounds are covered. this fact also accommodates effective air cooling. So is in the arrangement shown a much easier cooling possible by heat conduction into an outer cooling plate 6, since the winding 4, but also the magnetic parts (concentrators 1 and diffusers 2), are easily accessible.
- a special, advantageous version for cooling the Winding 4 results if this consists of a around the concentrator 1 wrapped sheet metal with heat-conducting layer insulation consists.
- This embodiment of the winding 4 also poses regarding minimal electrical power loss is an optimum.
- this version of the winding 4 is already by pressing a cooling plate 6 and one electrically insulating, thermally conductive intermediate layer 5, see Fig. 4, good cooling of the winding 4 can be achieved.
- the cooling plate 6 is already used in many cases for cooling the semiconductors of the converter.
- the requirements with regard to the electrical insulation of the intermediate layer 5 can be kept to a minimum, since the cooling plates 6 for the primary and secondary sides can be completely separate. (If both cooling plates have a common cooling liquid, the cooling liquid must of course be electrically insulating.) However, the clear electrical separation of the primary and secondary side also offers great degrees of freedom with regard to cooling, e.g. B. Liquid cooling of the primary side and air cooling of the secondary side.
Landscapes
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- General Induction Heating (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
- Fig. 1
- eine Prinzipdarstellung des magnetischen Kreises eines erfindungsgemäßen Transformators,
- Fig. 2
- den magnetischen Kreis des Transformators mit Wicklungen,
- Fig. 3
- den magnetischen Kreis des Transformators mit mehreren Isolierstellen zwischen Primär- und Sekundärseite und
- Fig. 4
- den Transformator mit zusätzlichen Maßnahmen zur Kühlung der Wicklungen.
Eine vorteilhafte Weiterführung der Erfindung besteht darin, die Diffusoren 2 und die Isolatoren 3 mehrfach im magnetischen Kreis in Reihe zu schalten und/oder konstruktiv zusammenzufassen, siehe Fig. 3. Die Wirkung des Diffusors 2 lässt sich dadurch bei extrem geringem Gewichtszuwachs weiter verbessern. Ein festes Zusammenfügen der Diffusoren 2 und der Isolatoren 3 - z. B. durch Verkleben unter Vakuum und Pressdruck - kann darüber hinaus vorteilhaft sein und die Isolationsfähigkeit verbessern. Auf Grund der erwähnten, recht freizügigen Auswahlmöglichkeiten bei den Materialien für die Diffusoren 2 und die Isolatoren 3 sind entsprechende Verbindungstechniken gut realisierbar.
Die eindeutige elektrische Trennung von Primär- und Sekundärseite bietet jedoch auch bzgl. der Kühlung große Freiheitsgrade, z. B. Flüssigkeitskühlung der Primärseite und Luftkühlung der Sekundärseite.
Claims (10)
- Transformator für hohe Betriebsfrequenz und Leistung, dadurch gekennzeichnet, dass sein magnetischer Kreis aus eine Primär- und eine Sekundärwicklung (4) tragenden ersten Kernteilen (1) besteht und über weitere Kernteile (2) und mindestens zwei, eine elektrische Isolation zwischen der Primär- und der Sekundärseite des Transformators bewirkende Isolatoren (3) geschlossen ist, wobei die ersten und die weiteren Kernteile (1, 2) so gestaltet sind, dass in den ersten Kernteilen (1) eine höhere Flussdichte herrscht als in den weiteren Kernteilen (2).
- Transformator nach Anspruch 1, dadurch gekennzeichnet, dass die ersten Kernteile (1) aus amorphem Metall bestehen.
- Transformator nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die weiteren Kernteile (2) aus Ferrit bestehen.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die weitern Kernteile (2) mit den Isolatoren (3) verklebt sind.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Primär- und/oder Sekundärwicklung aus einer Metallfolie besteht.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lagen der Primär- und/oder Sekundärwicklung durch elektrisch isolierende, gut wärmeleitende Zwischenlagen (5) voneinander getrennt sind.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Primär- und/oder Sekundärwicklung (4) mit einer Kühlplatte (6) verbunden ist.
- Transformator nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die Zwischenlagen (5) mit der Kühlplatte (6) verbunden sind.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Leiter der Primär- und/oder Sekundärwicklung (4) durch ein Fluid innengekühlt sind.
- Transformator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ersten und/oder weiteren Kernteile (1, 2) durch ein Fluid innengekühlt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10051157A DE10051157A1 (de) | 2000-10-16 | 2000-10-16 | Transformator für hohe Betriebsfrequenz und Leistung |
DE10051157 | 2000-10-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1199730A2 true EP1199730A2 (de) | 2002-04-24 |
EP1199730A3 EP1199730A3 (de) | 2002-12-11 |
EP1199730B1 EP1199730B1 (de) | 2007-08-08 |
Family
ID=7659911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124152A Expired - Lifetime EP1199730B1 (de) | 2000-10-16 | 2001-10-10 | Transformator für hohe Betriebsfrequenz und Leistung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1199730B1 (de) |
AT (1) | ATE369609T1 (de) |
DE (2) | DE10051157A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004025076B4 (de) * | 2004-05-21 | 2006-04-20 | Minebea Co., Ltd. | Spulenanordnung und Verfahren zu deren Herstellung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE280418C (de) * | ||||
WO1992009136A1 (en) * | 1990-11-14 | 1992-05-29 | Scanpower | A power supply circuit with integrated magnetic components |
DE29515973U1 (de) * | 1995-09-28 | 1995-12-07 | Siemens AG, 80333 München | Drosselkern |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH480719A (de) * | 1968-03-28 | 1969-10-31 | Bbc Brown Boveri & Cie | Transformatorkern mit Kühlkanälen parallel zu den Blechen, und Verfahren zu seiner Herstellung |
-
2000
- 2000-10-16 DE DE10051157A patent/DE10051157A1/de not_active Withdrawn
-
2001
- 2001-10-10 EP EP01124152A patent/EP1199730B1/de not_active Expired - Lifetime
- 2001-10-10 AT AT01124152T patent/ATE369609T1/de active
- 2001-10-10 DE DE50112822T patent/DE50112822D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE280418C (de) * | ||||
WO1992009136A1 (en) * | 1990-11-14 | 1992-05-29 | Scanpower | A power supply circuit with integrated magnetic components |
DE29515973U1 (de) * | 1995-09-28 | 1995-12-07 | Siemens AG, 80333 München | Drosselkern |
Also Published As
Publication number | Publication date |
---|---|
ATE369609T1 (de) | 2007-08-15 |
EP1199730A3 (de) | 2002-12-11 |
DE10051157A1 (de) | 2002-04-25 |
EP1199730B1 (de) | 2007-08-08 |
DE50112822D1 (de) | 2007-09-20 |
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