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WO2012072358A1 - Transducteur multiphasé - Google Patents

Transducteur multiphasé Download PDF

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Publication number
WO2012072358A1
WO2012072358A1 PCT/EP2011/069245 EP2011069245W WO2012072358A1 WO 2012072358 A1 WO2012072358 A1 WO 2012072358A1 EP 2011069245 W EP2011069245 W EP 2011069245W WO 2012072358 A1 WO2012072358 A1 WO 2012072358A1
Authority
WO
WIPO (PCT)
Prior art keywords
phases
phase
coupling means
coupling
coupled
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.)
Ceased
Application number
PCT/EP2011/069245
Other languages
German (de)
English (en)
Inventor
Wolfgang Helmreich
Roland Hellwig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2012072358A1 publication Critical patent/WO2012072358A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • H01F30/14—Two-phase, three-phase or polyphase transformers for changing the number of phases
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating

Definitions

  • the invention is based on a multi-phase converter according to the preamble of the independent claim.
  • a generic multiphase converter is known for example from WO 2009/114873 AI.
  • the DC / DC converter described therein comprises a non-linear inductive resistor coil, a switching system and an output filter. In the process, adjacent phases are coupled with each other.
  • a carrier body made of plastic includes a plurality of stacked conductor tracks, which are formed as stamped sheet metal.
  • the conductor tracks are arranged inside the plastic carrier body such that the plastic acts insulating between the conductor tracks.
  • the carrier body includes windings, a primary and a
  • a planar transformer for switching power supplies is already known.
  • a plastic film is provided with openings and cutouts for passing through the side legs and the center leg of the magnetic core.
  • the plastic film is printed with the two windings and then encapsulated with plastic compound.
  • carrier plates are stacked. After the magnetic cores have been installed, the mounting unit is molded with an insulating plastic mass.
  • independent claim 1 has the advantage of a contrast
  • Multiphase converter since in particular two-dimensional phase shapes can be used.
  • the coupling agents can also be arranged in a matrix.
  • a complex three-dimensional structure can be avoided. Characterized in that at least one encapsulation is provided which surrounds the phases, can be achieved in a particularly cost-effective manner secure isolation of the phases.
  • the coupling agents can also be arranged in a matrix.
  • Encapsulation can be used as a carrier for the relatively massive coupling agent.
  • the encapsulation also at least partially surrounds the coupling means.
  • a correct positioning of the phase can be achieved relative to the coupling means.
  • the otherwise required joining process of the coupling means can be omitted, in particular in the case of two-part coupling means.
  • at least one retaining means is provided, which is connected to the encapsulation and for fastening at least part of the coupling means. This facilitates assembly, since the coupling means can be clipped very easily and accurately positioned.
  • the mounting accuracy of a two-part coupling means increases when at least the first part of the coupling means is surrounded by the encapsulation, while the second part is connected by the holding means with the second part.
  • the encapsulation consists of a thermoplastic or thermosetting material.
  • Material selection can be kept low material expansion of the plastic and the coupling means at low cost mass production.
  • the phases are constructed as stamped grid and / or as part of a printed circuit board. This type of production is particularly cost-effective.
  • further electronic components such as the switching means can be arranged there.
  • the phases are formed as stamped grid. This type of production is characterized by low production costs. In a six-phase system, three phases may be rectangular and three phases U-shaped. In essence, the same geometric shapes can be used, so that the production further reduced.
  • phase to be coupled are at least partially enclosed by a coupling means, wherein the phases to be coupled can preferably be driven with different current direction.
  • the phases to be coupled preferably run at least partially approximately parallel in the region enclosed by the coupling means.
  • the coupling means at least two phases to be coupled magnetically in each case in a first region and in a first second area encloses.
  • planar ferrite cores can be used as a coupling agent. These could have a rectangular or double-rectangular cross-section.
  • the coupling means are arranged in a matrix.
  • the coupling means comprises at least two parts, wherein one of the parts has a U, O, I or E-shaped cross section. With this structure, it is particularly easy to surround the phases to be coupled by the coupling means. In an expedient development it is provided that between two parts, a gap, preferably an air gap is provided. In this way, it is particularly easy to influence the inductance. In an expedient development it is provided that a plurality of coupling means consisting of at least two parts have at least one common part, preferably a metal plate. This could facilitate assembly, since all coupling means could be closed in just one step by placing the plate.
  • a phase is coupled to a further phase for the at least partial compensation of the DC component of the current profile.
  • a phase is magnetically coupled with at least one further phase, which is essentially about 180 °
  • the coupling means can be smaller or it can be dispensed with an air gap.
  • the coupling means can be provided in a geometrically advantageous matrix arrangement. This is characterized by simple construction, the use of simple coupling means such as planar ferrite cores and low spatial extent. In addition, filters can be made smaller.
  • the switching means control the phases sequentially and that a phase is magnetically coupled to at least one further phase, which is activated immediately before and / or after.
  • a phase in a particularly expedient refinement, provision is made for a phase to be magnetically coupled to at least one further phase whose turn-on or turn-off instant lies immediately before and / or after.
  • a phase is magnetically coupled with at least two further phases, which are respectively controlled immediately before and after.
  • three coupling means are provided to magnetically couple one of the phases with three further phases.
  • the coupling means magnetically couple each of the six phases with three other of the six phases. This type of coupling on the one hand ensures that the individual phases can still be controlled independently of each other. In addition, the reliability of the multi-phase converter can be increased due to the stronger networking of the phases.
  • phase to be coupled are selected so that an optimal compensation can be achieved. This is done in particular by an opposing current profile.
  • the goal here is that the phases are magnetically coupled so that the resulting magnetic field is minimized due to the coupled phases. This makes it possible to resort to a space-small coupling means such as a ferrite core for coupling the magnetic fluxes. Through a corresponding coupling, the magnetic field could be greatly reduced, so that the corresponding
  • Coupling means such as a ferrite core
  • the Phases are sequentially addressed. This results in relatively simple and thus easily controllable current characteristics.
  • one phase - in the case of an arrangement with six phases - is coupled to the two respectively adjacent phases and also to a phase shifted by 180 degrees.
  • An adjacent phase is understood to be one which is actuated immediately preceding or subsequently.
  • an independent control of the individual phases is possible from each other.
  • coupling means which magnetically couple at least one phase with at least three further phases, can also increase the reliability, since at least three times coupling a higher networking of the phases is achieved, so that the failure of a phase is not yet unsafe operating conditions can lead.
  • the coupling means can be smaller or it can be dispensed with an air gap.
  • At least two, in particular three coupling means are provided to magnetically couple one of the phases with two further phases, wherein at least one of the two coupling means has a lower inductance than the other coupling means.
  • a lower inductance can serve as saturation protection.
  • coupling means with a lower inductance only saturate later at higher currents, so that the multiphase converter can be operated even longer in a stable operating state in the event of a fault.
  • a high inductance reduces the current ripple, ie the ripple of the current.
  • the coupling means which couples a phase with a phase which is driven substantially phase-shifted by approximately 180 ° has a lower inductance than at least one of the other coupling means.
  • three coupling means are provided to magnetically couple one of the phases with three further phases, wherein at least one of the three coupling means has a lower
  • a coupling means with lower inductance should be provided for each of the preferably six phases.
  • the coupling means is provided with an air gap. In a particularly simple manner, this can influence the inductance of the coupling agent. Is otherwise the same
  • the inductance is reduced compared to the version without an air gap. This can be done particularly suitably by the middle of the three legs of the
  • Coupling means is shortened relative to the two outer, so that there forms an air gap.
  • Figure 1 is a circuit arrangement
  • Figure 2 is a schematic representation of the respective coupling of the phases
  • Figure 3 shows the spatial arrangement of the various phases and coupling means
  • Figure 4 is a section through a coupling means with two coupled
  • FIG. 7 is a side view of an embodiment with an encapsulation of the phases and the first part of the coupling means
  • Figure 8 is a side view of a further alternative
  • Embodiment with complete encapsulation of the phases and the coupling means and the figure 9 is a perspective view of another
  • Embodiment with vorum mousseten phases Embodiment with vorum mousseten phases.
  • FIG. 1 The structure of a multi-phase converter 10 is shown in FIG. 1
  • Multiphase converter 10 consists of six phases 11 to 16. Each of phases 11 to 16 can be individually controlled via respective switching means 21 to 26, each consisting of a high-side switch and a low-side switch. Each current of the phases 11 to 16 flows due to magnetic coupling with three other phases by three inductors Lxx, the corresponding Coupling 31 to 39 cause.
  • a first coupling means 31 magnetically couples the first phase 11 with the second phase 12, so that an inductance L12 results for the first phase 11, and an inductance L21 for the second phase 12.
  • a sixth coupling means 36 magnetically couples the first phase 11 with the sixth phase 16 so that an inductance L16 results for the first phase 11, and an inductance L61 for the sixth phase 16.
  • a seventh coupling means 37 magnetically couples the first phase 11 with the fourth phase 14, so that an inductance L14 results for the first phase 11, and an inductance L41 for the sixth phase 16.
  • a second coupling means 32 magnetically couples the second phase 12 with the third phase 13, so that an inductance L23 for the second phase 12, and an inductance L32 for the third phase 13 results.
  • a ninth coupling means 39 magnetically couples the second phase 12 to the fifth phase 15, so that an inductance L25 is produced for the second phase 12, and an inductance L52 for the fifth phase 15.
  • a third coupling means 33 magnetically couples the third phase 13 with the fourth phase 14, so that an inductance L34 results for the third phase 13, and an inductance L43 for the fourth phase 14.
  • An eighth coupling means 38 magnetically couples the third phase 13 with the sixth phase 16 so that an inductance L36 is produced for the third phase 13 and an inductance L63 for the sixth phase 16.
  • a fourth coupling means 34 magnetically couples the fourth phase 14 to the fifth phase 15, so that an inductance L45 results for the fourth phase 14, an inductance L54 for the fifth phase 15.
  • a fifth coupling means 35 magnetically couples the fifth phase 15 with the sixth phase 16, so that an inductance L56 results for the fifth phase 15, and an inductance L65 for the sixth phase 16.
  • An input current I E is distributed over the six phases 11 to 16.
  • a capacitor is connected as a filter medium to ground.
  • the outputs of phases 11 to 16 are at a common summation point
  • FIG. 2 is shown systematically how the six phases 11 to 16 are coupled together by respective coupling means 31 to 39.
  • both adjacent phases are coupled together as well as in addition the phase offset by 180 degrees.
  • An adjacent phase is understood to be one which is actuated chronologically immediately preceding or following, that is to say whose turn-on times are immediately before or after it. in the
  • the designation of the phases 11 to 16 is selected so that the phases 11 to 16 are controlled sequentially according to the numbering, that is in the order (information corresponding to the reference numerals of the phases): 11-12-13-14-15-16 - 11, etc., each phase shifted by 60 degrees or by T / 6 (360 degrees / number of phases), where T represents the period of a drive cycle.
  • This sequence is also shown in FIG. 2 and FIG. That means the start times for the
  • the respective phase is switched off again after the time duration T / 6 (PWM ratio 1/6).
  • FIG. 3 schematically depicts the matrix-like spatial structure of the concept shown in FIG.
  • the coupling means 31 to 39 are preferably designed as planar coil cores, for example ferrite cores, each having two cavities. In these cavities of the
  • Coupling means 31 to 39 are each two conductors or phase sections of two phases to be coupled enclosed, which have different current directions in these sections, as indicated by the arrows.
  • phase 11 to 16 two geometric shapes of the phases 11 to 16 or busbars or conductors of the phases 11 to 16 can be made.
  • the first phase 11, third phase 13 and fifth phase 15 are U-shaped. These three phases 11, 13, 15 preferably all run in same level.
  • second, fourth and sixth phase 12, 14, 16 In a further spaced and parallel plane - in the embodiment of Figure 3 above - run the second, fourth and sixth phase 12, 14, 16.
  • Second, fourth and sixth phase 12, 14, 16 are rectangular or meander-shaped. They are in this case arranged so that they are enclosed in the respective coupling means 31 to 39 with the respective phase to be coupled U-shaped phase 11, 13, 15 at different current direction.
  • the first coupling means 31 consists of an E-shaped first part 44 and a plate-shaped second part 43, which form the coil cores.
  • the legs of the first part 44 with E-shaped cross-section are all the same length, so that they can be closed by the plate-shaped (I-shaped cross-section) second part 43 without air gap.
  • the preferably band-shaped section of the first phase 11 is respectively introduced in the lower region of the coupling means 31. These shown portions of the first phase 11 are in the same plane, so they are planar to each other.
  • first and second phases 11, 12 are carried out in each case opposite to the current direction in the other cavity opposite current direction. This is done in the case of the first coupling means 31 in that both the first phase 11 and the second phase 12 at the upper end face of the first coupling means 11 in a 180 degree bend are returned through the other cavity again. Also, the two sections of the second phase 12, the first coupling means 31
  • first phase 11 and the plane of the second phase 12 are enclosed, are in the same plane, so are formed planar.
  • the plane of the first phase 11 and the plane of the second phase 12 are formed at least in the inner region of the first coupling means 31 parallel and spaced from each other.
  • an insulation 45 is provided between the first phase 11 and the second phase 12 for the electrical separation of the two phases 11, 12 from each other and each to the coupling means 31.
  • the second phase 12 is coupled to the third phase 13 via the second coupling means 32.
  • the second phase 12 is coupled to the fifth phase 15 by means of the ninth coupling means 39.
  • the further corresponding couplings can be seen in FIG. 3 and will not be described again specifically.
  • FIG. 6 is a perspective view of an alternative
  • meandering phases 12, 14, 16 in a plane.
  • they have Abklappungs Gradee 60, which are oriented perpendicular to the main plane.
  • These Abklappungs Kunststoffe 60 are angled at approximately 90 ° with respect to the main plane and arranged laterally mutually offset. They each connect the sections lying in the main plane.
  • the lying in the main plane areas of the bus bars of the meandering phases 12, 14, 16 are surrounded by the coupling means 31 to 39 together with
  • the band-shaped busbar is changed when reaching the main plane by a fold by 90 ° only in their direction and then runs in the main plane to the left to the first, left
  • Drop-off area 60 This includes both a 90 ° fold, so that the narrow side surface of the busbar is oriented parallel to the main plane. Also, the Abklappungs Scheme two direction changes of
  • Busbars each 90 ° in order to achieve the desired meandering or S-shaped structure. After the second change in direction of the busbar this runs again after bending again in the main plane from left to right, until a further, right Abklappungs Scheme 60 connects via a fold. This is repeated so that six busbar sections extending in the main plane are formed, which are each connected laterally by three or two fold-down regions 60. The last, rear fold-down area 60 connects the last running in the main plane
  • Busbar section with the terminal surface 97 which is also in the
  • Overmoulding 114 provided.
  • the ends of the legs of the E-shaped first part 44 are no longer surrounded by the encapsulation 114, but can be closed directly by the I-shaped second part 43. Thanks to the encapsulation 114, a precise, positionally correct fixing of the phases 11, 12 relative to the coupling means 31 to 39 is possible.
  • the encapsulation 114 surrounds for isolation both the individual phases 11, 12, so that they are insulated from one another. In addition, the encapsulation also prevents an electrically conductive
  • holding means 116 are provided, which are connected to the extrusion 114 and serve to receive the second part 43 in such a way that the legs of the E-shaped first part 44 through the second part 43 is closed become.
  • the holding means 116 are arranged on the side of the extrusion 114, on which the end faces of the legs of the first part 44 are located.
  • the exemplary embodiment according to FIG. 9 already shows a pre-sprayed phase 11.
  • this phase 11 is surrounded by an encapsulation 120.
  • the pre-sprayed phase 11 are in the manner already described by
  • Multiphase converters 10 or DC / DC converters with high powers without special isolation requirements can preferably be realized in multi-phase arrangements.
  • the high input current I E for example, in the amount of 300 A distributed to the various six phases 11 to 16 in the amount of 50A.
  • the corresponding input or output filter according to Figure 1 for example, drawn as capacitors, correspondingly small.
  • the control of the phases 11 to 16 is carried out sequentially, that is, one after the other, so that the switch-on times each 60 degrees (or.
  • the respective phases 11 to 16 are energized with different durations.
  • the corresponding high-side switch of the switching means 21 to 26 is closed for this purpose.
  • the phase 11 to 16 is not energized when the corresponding low-side switch of the switching means 21 to 26 is closed.
  • such phases could be 11 to 16 as be considered adjacent, whose turn-off is immediately before or after. Then the corresponding switch-on points would be variable depending on the desired PWM signal.
  • a phase 11 with at least three further phases 12, 14, 16 is magnetically coupled to one another in such a way that the DC components of the individual phases are respectively compensated as strongly as possible by other phases.
  • Cores are sized accordingly small, resulting in significant savings in coupling material, mass and cost. In particular, the space can be greatly reduced.
  • the third phase to be coupled is now preferably selected such that a disturbing mutual influence of the phases is minimized.
  • the selection is made so that an optimal compensation of the DC component is achieved. It has been found that in addition to the adjacent phases (+/- 60 degrees
  • Coupling means 31 to 39 which can now manage with a smaller volume.
  • the coupling shown in Figures 1 to 3 has been found to be particularly suitable.
  • two phases can be magnetically coupled by passing the two phases with antiparallel current conduction through a rectangular or annular coupling means 31 to 41. It is essential that the coupling means 31 to 41 is capable of forming a magnetic circuit. This is possible with a substantially closed structure, which may also include an air gap. Furthermore, the coupling means 31 to 41 consists of a magnetic field conducting material with suitable permeability.
  • FIG. 3 The coupling concept on which FIG. 3 is based can be explained by way of example with reference to FIG. It is essential that the phases to be coupled - according to Figure 4, there are first phase 11 and second phase 12 - with
  • the corresponding coupling means 31 to 41 can be smaller or it can be dispensed with an air gap.
  • a possible realization concept of the embodiment according to FIG. 3 could consist of a printed circuit board in which the nine coupling means 31 to 39, here preferably planar cores, are embedded. On this circuit board, all switching means 21 to 26, each consisting of high-side or
  • Lowside MOSFETs are integrated as possible embodiments.
  • the windings for the first, third and fifth phases 11, 13, 15 can also be integrated into this printed circuit board.
  • the other windings of the second, fourth and sixth phase 12, 14, 16 could be realized via a less expensive copper stamped grid.
  • the further windings of the second, fourth and sixth phases 12, 14, 16 could also be integrated in the printed circuit board.
  • the coupling means 31 to 41 are inductive coupling means, such as an iron or ferrite core of a transformer, on which the phases 11 to 16 to be coupled generate a magnetic field.
  • the coupling means 31 to 42 closes the magnetic circuit of the two
  • coupling agent 31 to 38 material and permeability is not as important to coupling. If no air gap is used, the permeability of the magnetic circuit increases, which increases the inductance of the coil. As a result, the current increase is flatter and the current forms approach more to the ideal direct current. The closer the waveforms to a DC current, the lower the resulting current difference between the two phases that are (oppositely) passed through a core as coupling means 31-42. The effort for filters is thereby reduced. On the other hand, a system without an air gap is very sensitive to the different currents between phases 11 to 16. Although the system tends to saturate with lower current errors, it is still quite stable due to the multiple coupling.
  • the use of only two geometric shapes of the phases 11 to 16 as shown in Figure 5 in plan view is particularly advantageous in terms of manufacturing technology.
  • the one basic shape in this case has a U-shaped course and lie in the same plane.
  • the second basic shape is substantially rectangular or meander-shaped, also lying in the same plane.
  • the sections shown can be used as strip conductors in the form of punched grids or in
  • the U-shaped phases 11, 13, 15 are arranged relative to one another such that they come to lie on a first plane. Accordingly, the rectangular or meandering phases 12, 14, 16 are arranged so that they come to rest on a second level. These two planes are arranged parallel to one another and at a distance from one another such that the phase sections to be coupled in each case can be surrounded by the coupling means 31 to 39.
  • the coupling means 31 to 39 can be arranged closer to the respectively adjacent coupling means 31 to 39. This can be achieved, for example, according to the exemplary embodiment according to FIG. 6 in that the ends of the busbars of the phases 12, 14, 16 are folded down in fold-down regions 60. As soon as the coupled phase regions (those regions which are surrounded by the coupling means 31 to 39) Leave coupling means 31 to 39, the direction changes from that within the coupled phase regions (those regions which are surrounded by the coupling means 31 to 39).
  • Coupling means 31 to 42 thereby, the coupling means 39, 35; 35, 34; 32, 38; 38, 33 move closer together.
  • the meandering busbars of the respective phases 12, 14, 16 also on the sides
  • the first part 44 is now embedded together with the phases 11, 12 in a plastic 114. This could be done by overmolding, potting or similar processes.
  • encapsulation is also understood to mean encapsulation in the sense that liquid or pasty material surrounds and hardens the part to be encapsulated
  • the second part 43 is mounted on the core half 44 already embedded in the plastic, for example by clipping Extension of the coupling means 31 to 39 and the encapsulation 114 is a exact selection of materials required. It may be possible to use a thermoset material instead of the thermoplastic method
  • the encapsulation 114 makes it possible in particular to realize the matrix-shaped structure of the phases 11 to 16 shown in FIG. 3, which are arranged on two parallel and spaced-apart planes.
  • both parts 43, 44 of the coupling means 31 to 39 are now encapsulated together.
  • the multi-phase converter 10 described is particularly suitable for use in a motor vehicle electrical system, in which in particular dynamic load requirements are of minor importance. In particular, for such relatively slow systems, the structure described is suitable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un transducteur multiphasé, comprenant plusieurs phases électriques (11 à 16) qui sont respectivement commandables par des moyens de commutation (21à 26), au moins un moyen de couplage (31 à 39) permettant d'assurer le couplage magnétique au moins d'une première phase (11) et au moins d'une autre phase (12, 14, 16); au moins deux phases (11, 12) à coupler étant entourées au moins partiellement du moyen de couplage (31); au moins un surmoulage (114, 118, 120) entourant les phases (11 bis 16).
PCT/EP2011/069245 2010-12-01 2011-11-02 Transducteur multiphasé Ceased WO2012072358A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010062242.7 2010-12-01
DE201010062242 DE102010062242A1 (de) 2010-12-01 2010-12-01 Multiphasenwandler

Publications (1)

Publication Number Publication Date
WO2012072358A1 true WO2012072358A1 (fr) 2012-06-07

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PCT/EP2011/069245 Ceased WO2012072358A1 (fr) 2010-12-01 2011-11-02 Transducteur multiphasé

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WO (1) WO2012072358A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500943C1 (de) 1995-01-14 1996-05-23 Friemann & Wolf Gmbh Planartransformator für Schaltnetzteile zur Erzeugung von Kleinspannungen und Verfahren zu dessen Herstellung
DE10039890A1 (de) 1999-09-14 2001-03-15 Mannesmann Vdo Ag Planartransformator und Verfahren zur Herstellung seiner Wicklung sowie eine kompakte elektrische Vorrichtung mit einem solchen Planartransformator
EP1145416B1 (fr) 1999-10-01 2003-09-03 Robert Bosch Gmbh Convertisseurs pour la transformation d'energie electrique
US20080303495A1 (en) * 2007-06-08 2008-12-11 Intersil Americas Inc. Power supply with a magnetically uncoupled phase and an odd number of magnetically coupled phases, and control for a power supply with magnetically coupled and magnetically uncoupled phases
US20090179723A1 (en) * 2002-12-13 2009-07-16 Volterra Semiconductor Corporation Method For Making Magnetic Components With M-Phase Coupling, And Related Inductor Structures
WO2009114873A1 (fr) 2008-03-14 2009-09-17 Volterra Semiconductor Corporation Inducteur convertisseur de tension ayant une valeur d’inductance négative

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19500943C1 (de) 1995-01-14 1996-05-23 Friemann & Wolf Gmbh Planartransformator für Schaltnetzteile zur Erzeugung von Kleinspannungen und Verfahren zu dessen Herstellung
DE10039890A1 (de) 1999-09-14 2001-03-15 Mannesmann Vdo Ag Planartransformator und Verfahren zur Herstellung seiner Wicklung sowie eine kompakte elektrische Vorrichtung mit einem solchen Planartransformator
EP1145416B1 (fr) 1999-10-01 2003-09-03 Robert Bosch Gmbh Convertisseurs pour la transformation d'energie electrique
US20090179723A1 (en) * 2002-12-13 2009-07-16 Volterra Semiconductor Corporation Method For Making Magnetic Components With M-Phase Coupling, And Related Inductor Structures
US20080303495A1 (en) * 2007-06-08 2008-12-11 Intersil Americas Inc. Power supply with a magnetically uncoupled phase and an odd number of magnetically coupled phases, and control for a power supply with magnetically coupled and magnetically uncoupled phases
WO2009114873A1 (fr) 2008-03-14 2009-09-17 Volterra Semiconductor Corporation Inducteur convertisseur de tension ayant une valeur d’inductance négative

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