Device for receiving a transformer core and transformer

Abstract

The device (1) comprises a first receiving area (21) configured to receive a first leg (111) of a transformer core (10). The device (1) further comprises a second receiving area (22) configured to receive a second leg (121) of the transformer core (10). The first receiving area (21) and the second receiving area (22) are separated by an electrically insulating first partition wall (23). In particular, the device (1) is configured for winding a first winding and a second winding, wherein the first winding is arranged at least partially between the device (1) and the second winding.

Description

[0001] Description

[0002] Device for receiving a transformer core and transformer

[0003] The invention relates to a device for receiving a transformer core for a transformer and to a transformer having such a device.

[0004] To ensure electrical safety requirements for a transformer, prescribed insulation distances, such as creepage distances or clearances, must be maintained. These distances are specified in industry standards, such as the IEC standard. The creepage distances and / or clearances depend on the applied voltage, the material, or environmental influences, such as pollution and altitude above sea level.

[0005] Typically, insulation distances between the windings of a transformer do not need to be maintained because insulated wires are conventionally used.

[0006] However, specified insulation distances between non-insulated parts of different potentials must be observed. Examples of such non-insulated parts include wire ends of the winding where the wire insulation has been removed. Other examples of non-insulated parts include connection pins or solder joints of the transformer. In connection with insulation distances, such non-insulated parts are also referred to as active parts.

[0007] Since a transformer core is conductive, it is considered an intermediate conductive part during insulation coordination, or the entire transformer core is assigned to a potential. A first potential is assigned, in particular, to a primary side of the transformer, and a second potential is assigned, for example, to a secondary side of the transformer.

[0008] If the transformer core is assigned to one of the potentials, the specified insulation distances between the transformer core and the other potential must be maintained. If the transformer core is considered potential-free in the middle, the specified insulation distances must be maintained to both potentials. Especially at higher voltages, i.e., in high-voltage or medium-voltage applications, this can lead to larger transformer component dimensions. This makes it difficult to design a compact component, especially with paired transformer cores, such as so-called E-cores.

[0009] To comply with the prescribed insulation clearances, the component is typically enlarged, or the transformer core can be partially or completely encapsulated in a plastic housing. Potting the transformer core is also possible. US Pat. No. 9,646,755 B2 specifically describes arranging the transformer core in a housing that is open at the sides to insulate the core from the connection pins.

[0010] One problem to be solved is to provide an improved device or an improved insulating body for accommodating a transformer core, with which, in particular, a compact transformer can be realized. A further problem to be solved is to specify a transformer that has one or more such devices or one or more such insulating bodies.

[0011] These objects are achieved by a device or an insulating body having the features of independent patent claim 1 and by a transformer having the features of patent claim 11. Preferred embodiments and further developments are the subject of the respective dependent patent claims.

[0012] According to a first preferred embodiment of the device, the device is an insulating body for accommodating a transformer core. In the following description of the first preferred embodiment of the device, the device may therefore also be referred to as an insulating body.

[0013] The transformer in particular has a paired transformer core. The insulating body comprises at least a first tube with a first receiving region and an opposite second receiving region, as well as a first partition wall that separates the first receiving region from the second receiving region. The first receiving region is configured to receive a first leg of a first half of the transformer core. The second receiving region is configured to receive a first leg of a second half of the transformer core.

[0014] The first and second receiving regions are designed in particular as recesses or housings in the first tube. This means that the first receiving region extends from a first receiving opening along a main direction of extension of the first tube into the first tube. The second receiving region preferably extends from a second receiving opening along the main direction of extension of the first tube into the first tube. Consequently, the first receiving region and the second receiving region can be formed inside the tube. The first receiving opening is opposite the second receiving opening when viewed in the main direction of extension. Likewise, the first receiving region is opposite the second receiving region in the main direction of extension.

[0015] If a leg of a transformer core is inserted into the first and second receiving areas, this leg is preferably completely surrounded, at least in part, by the first tube. This particularly means that the leg has at least one area in which the leg is completely surrounded by the first tube in a closed path around the leg.

[0016] For example, the first and / or second receiving area is designed such that the first and / or second receiving area can be completely or substantially completely filled by the first leg of the first or second half of the transformer core. In particular, in the case that a transformer core is arranged in the insulation body, the first leg of the first half at least partially touches the first partition wall and preferably side walls of the first receiving area. Side walls of the receiving areas are here and hereinafter, in particular surfaces of the corresponding tube arranged in the interior of the associated tube. Likewise, the first leg of the second half preferably touches the first partition wall and preferably side walls of the first

[0017] Recording area at least partially.

[0018] The first tube is preferably formed from an electrically insulating material. In particular, the first partition wall is also formed from an electrically insulating material. Thus, the first leg of the first half is electrically insulated from the first leg of the second half of the transformer core.

[0019] With an insulation coordination of the transformer, the first half of the transformer core can be assigned to a first potential and the second half of the transformer core to a second potential, since the cores are insulated from each other by the first partition.

[0020] An insulation barrier for insulation coordination thus runs between the halves of the transformer core. Maintaining an insulation distance between the active parts and the transformer core is no longer necessary, since the first half of the transformer core can be assigned to the active parts with an assigned first potential, and the second half of the transformer core can be assigned to the active parts with an assigned second potential. The first potential is assigned, for example, to a primary side, and the second potential is assigned, for example, to a secondary side of the transformer.

[0021] An insulation distance, for example a creepage distance or air gap, now runs along the first tube or other optional tubes. By appropriately dimensioning the tubes, e.g. the length, a specifiable creepage distance can be maintained and at the same time the transformer core can be brought close to the active parts, such as soldering points or connection pins. This advantageously allows the component to be designed to be particularly compact. Furthermore, additional potting or a special housing can be dispensed with. Furthermore, the insulation body described here allows the cores to be installed particularly easily. In addition, standard winding and connection measures can be carried out.

[0022] Preferably, the insulation body for receiving a transformer core according to the first preferred

[0023] The embodiment further comprises a second tube with a third receiving area and a fourth receiving area, as well as a second partition wall which separates the third receiving area from the fourth receiving area. The third receiving area is located in the fourth receiving area, in particular along a main direction of extension of the second tube. The third receiving area is in particular formed as a recess or housing in the second tube and extends from a third receiving opening into the tube. The fourth receiving area is preferably also formed as a recess or housing in the second tube and preferably extends from a fourth receiving opening into the second tube.

[0024] The third receiving area is in particular designed to receive a second leg of a first half of the transformer core and the fourth receiving area is in particular designed to receive a second leg of a second half of the transformer core. In particular, the second tube has similar or identical features to the first tube. For example, the second tube has a third receiving opening and a fourth receiving opening, from which the third and fourth receiving areas extend.

[0025] By using a second tube, transformer cores with two U-halves can be used, for example.

[0026] Preferably, the first tube and the second tube are separate individual parts. For example, there is no direct mechanical connection between the first tube and the second tube. It is possible for the first tube and the second tube to be connected to one another via the transformer core. Preferably, each tube is assigned a pair of legs.

[0027] It is furthermore possible for the insulating body for accommodating a transformer core according to the first preferred embodiment to comprise at least a third tube with a fifth accommodating region and a sixth accommodating region as well as a third dividing wall which separates the fifth accommodating region from the sixth accommodating region. The fifth accommodating region lies opposite the sixth accommodating region in the main direction of extent of the third tube. The fifth accommodating region is formed in particular as a recess or housing in the third tube and extends from a fifth accommodating opening into the tube. The sixth accommodating region is preferably likewise formed as a recess or housing in the third tube and preferably extends from a sixth accommodating opening into the third tube.

[0028] The fifth receiving area is particularly configured to receive a third leg of a first half of the transformer core, and the sixth receiving area is particularly configured to receive a third leg of a second half of the transformer core. In this embodiment, the transformer core is preferably a so-called E-core. In this case, the first leg is also referred to as the center leg, and the second and third legs are referred to as the side legs.

[0029] Preferably, the first tube, the second tube, and the third tube are separate individual parts. For example, there is no direct mechanical connection between the first tube, the second tube, and the third tube. It is possible for the tubes to be connected to one another via the transformer core. Preferably, each tube is assigned a pair of legs.

[0030] If features or combinations of features are disclosed here and below with respect to the first, second and / or third tube, these features and combinations of features are also deemed to be disclosed for the other tubes, even if this is not explicitly mentioned in the context of the disclosure of the said feature.

[0031] The insulating body for accommodating a transformer core according to the first preferred embodiment preferably comprises at least one winding region in which the insulating body is configured to accommodate a primary winding and / or a secondary winding. The primary and secondary windings transform the voltage between a primary side and a secondary side of the transformer. A region of the insulating body in which the winding region is arranged is also referred to as a coil former. With regard to the insulation coordination, the primary side is assigned, for example, to the first potential and the secondary side is assigned, for example, to the second potential.

[0032] Preferably, both the primary winding and the secondary winding are formed from a wound wire covered with insulation. The insulation can be removed at the ends of the wire so that the wire can be electrically connected to terminal pins of the transformer or the insulation body, respectively.

[0033] For example, the first tube has the winding region. In this case, the optionally additional tubes can be free of a winding region. In particular, the first tube forms a coil former. If the transformer core is, for example, a so-called E-core, the primary and secondary windings are preferably attached to the first tube.

[0034] For example, the primary winding is arranged between the first tube and the secondary winding. This means, in particular, that the primary winding is arranged on the first tube, and the secondary winding is arranged on the primary winding.

[0035] Alternatively, it is possible for the secondary winding to be arranged between the first tube and the primary winding. This means, in particular, that the secondary winding is arranged on the first tube and the primary winding is arranged on the secondary winding.

[0036] It is also possible for the insulating body to comprise a second and / or a third tube having a winding region. For example, several winding regions can be distributed across different tubes. For example, a winding region for the primary winding is arranged on the first tube, and a winding region for the secondary winding is arranged on the second tube.

[0037] In particular, the first tube is formed from an electrically insulating plastic. If the insulation body comprises a second and / or third tube, these are also formed from an electrically insulating plastic. The plastic is, for example, a polyamide, a liquid polymer, and / or a phenol.

[0038] In a step perpendicular to a main extension direction of the first tube, at least the first tube in the first and / or second receiving region has a first contour that is similar to a second contour of the first leg of the first or second half of the transformer core. The term "similar" here refers to similarity in the mathematical sense.

[0039] The first contour can be seen, for example, in the view of the first or second receiving area of ​​the first tube. The first contour is defined, for example, by the receiving opening.

[0040] The first contour is, for example, rectangular or square. In other words, the first or second receiving opening has a rectangular or square contour. The first contour is in particular similar to the second contour, which can be seen through a cross-section of the first leg of the first or second half of the transformer core. The second contour is preferably rectangular or square and has a shape and size such that the corresponding leg can be inserted into the corresponding receiving opening. There is preferably only a small gap between the leg and the associated receiving opening. The first and second receiving openings are preferably designed such that the first and second receiving openings can be filled essentially completely by legs of the transformer core.

[0041] The first tube preferably has a length of at least one creepage distance required for the transformer. More preferably, the second and third tubes also have a corresponding length. Since, during insulation coordination, the first potential and the second potential are separated along the partition, a creepage distance runs along the first or second and third tubes. By appropriately dimensioning the tubes, a creepage distance can be maintained, and the transformer having the insulation body described here can meet the required safety standards.

[0042] The first partition wall, as well as the optional second and third partition walls, preferably have a thickness of between 0.1 mm and 2 mm. It is also possible for the thickness to be up to 5 mm or more. The thickness is measured, in particular, parallel to the main extension direction of the tubes. With such a thickness, electrical insulation of the halves of the transformer core can be ensured while simultaneously achieving a magnetic coupling between the halves.

[0043] According to a second preferred embodiment of the device, the device is configured to receive legs of a transformer core. The device comprises a first receiving area configured to receive a first leg of the transformer core. Furthermore, the device comprises a second receiving area configured to receive a second leg of the transformer core. The first receiving area and the second receiving area are separated by an electrically insulating first partition wall.

[0044] In particular, the device is designed for winding with a first winding and a second winding, wherein the first winding is arranged at least partially between the device and the second winding.

[0045] The first winding may be a primary winding and the second winding may be a secondary winding. Alternatively, the first winding may be a secondary winding and the second winding may be a primary winding.

[0046] The first and second receiving areas are in particular each formed as recesses or housings in the device. This means that the first receiving area extends from a first receiving opening into the device. The second receiving area preferably extends from a second receiving opening into the device. Consequently, the first receiving area and the second receiving area can be formed in the interior of the device. The first receiving opening can be opposite the second receiving opening, in particular along a main extension direction of the device.

[0047] If a leg of a transformer core is inserted into the first and second receiving areas, this leg is preferably completely surrounded at least in part by the device. This particularly means that the leg has at least one region in which the leg is completely surrounded by the device in a closed path around the leg.

[0048] For example, the first and / or second receiving region is designed such that the first and / or second receiving region can be completely or substantially completely filled by the first limb or second limb, respectively. In particular when a transformer core is arranged in the device, the first limb at least partially touches the first partition wall and preferably side walls of the first receiving region. Side walls of the receiving regions here and below are particularly surfaces arranged in the interior. Likewise, the second limb preferably at least partially touches the first partition wall and preferably side walls of the second receiving region.

[0049] In particular, the device and preferably the first partition wall are formed from an electrically insulating plastic. The plastic is, for example, a polyamide, a liquid polymer and / or a phenol. The first limb is thus electrically insulated from the second limb of the transformer core. For example, the transformer core is a paired transformer core. In particular, the first limb is assigned to a first half of the transformer core and the second limb is assigned to a second half of the transformer core. This means, in particular, that the first limb of the second preferred embodiment of the device corresponds to the first limb of the first half according to the first preferred embodiment.Furthermore, in particular the second leg of the second preferred embodiment of the device corresponds to the first leg of the second half of the first preferred embodiment.

[0050] The transformer core is preferably part of a transformer. With insulation coordination of the transformer, the first half of the transformer core can be assigned to a first potential and the second half of the transformer core to a second potential, since the cores are insulated from each other by the first partition.

[0051] An insulation barrier for insulation coordination thus runs between the halves of the transformer core. Maintaining an insulation distance between the active parts and the transformer core is no longer necessary, since the first half of the transformer core can be assigned to the active parts with an assigned first potential, and the second half of the transformer core can be assigned to the active parts with an assigned second potential. The first potential is assigned, for example, to a primary side, and the second potential is assigned, for example, to a secondary side of the transformer. An insulation distance, for example a creepage distance or clearance, now runs along the device.By appropriately dimensioning the device, for example its length, a predefined creepage distance can be maintained and, at the same time, the transformer core can be brought close to the active parts, such as soldering points or connection pins. This advantageously allows the transformer to be designed to be particularly compact. Furthermore, additional potting or a special housing can be dispensed with. Furthermore, the device described here allows for particularly simple assembly of the cores. In addition, standard winding and connection measures can be carried out.

[0052] The device preferably comprises at least one winding region in which the device is configured to accommodate a first winding and / or a second winding, or a primary winding and / or a secondary winding. The primary and secondary windings transform the voltage between a primary side and a secondary side of the transformer.

[0053] With regard to the insulation coordination, the primary side is assigned, for example, to the first potential and the secondary side is assigned, for example, to the second potential. Preferably, both the primary winding and the secondary winding are formed from a wound wire that is covered with insulation. The insulation can be removed at the ends of the wire so that the wire can be electrically connected to connection pins of the transformer or of the insulation body. In a development of the second preferred embodiment, the device comprises a third receiving area that is designed to receive a third leg of the transformer core. Furthermore, the device can comprise a fourth receiving area that is designed to receive a fourth leg of the transformer core. The third and fourth receiving areas are separated in particular by an electrically insulating second partition wall.

[0054] If, for example, the transformer core is a paired transformer core, the third leg is preferably assigned to the first half and the fourth leg is assigned to the second half. This means, in particular, that the third leg of the second preferred embodiment of the device corresponds to the second leg of the first half according to the first preferred embodiment. Furthermore, in particular, the fourth leg of the second preferred embodiment of the device corresponds to the second leg of the second half of the first preferred embodiment.

[0055] The third receiving area is located in the fourth receiving area, in particular along a main direction of extension of the device. The third receiving area is in particular formed as a recess or housing and extends from a third receiving opening into the device. The fourth receiving area is preferably also formed as a recess or housing and preferably extends from a fourth receiving opening into the device. By forming the third and fourth receiving areas, for example, transformer cores with two U-halves can be used.

[0056] In a further development of the second preferred embodiment, the device comprises a fifth receiving area configured to receive a fifth leg of the transformer core. Furthermore, the device may comprise a sixth receiving area configured to receive a sixth leg of the transformer core. The fifth and sixth receiving areas are separated, in particular, by an electrically insulating third partition wall.

[0057] If, for example, the transformer core is a paired transformer core, the fifth leg is preferably assigned to the first half and the sixth leg is assigned to the second half. This means, in particular, that the fifth leg of the second preferred embodiment of the device corresponds to the third leg of the first half according to the first preferred embodiment. Furthermore, in particular, the sixth leg of the second preferred embodiment of the device corresponds to the third leg of the second half of the first preferred embodiment.

[0058] The fifth receiving area is located in the sixth receiving area, in particular along a main direction of extension of the device. The fifth receiving area is in particular formed as a recess or housing and extends from a fifth receiving opening into the device. The sixth receiving area is preferably also formed as a recess or housing and preferably extends from a sixth receiving opening into the device. Due to the formation of the fifth and sixth receiving areas, for example, transformer cores with two E halves can be used.

[0059] In a further development of the device according to the second preferred embodiment, the device comprises a first insulating element in which the first and second receiving regions and the first partition wall are arranged. In particular, the first insulating element is designed for winding with the first winding and the second winding. In particular, the first insulating element is designed for winding with the primary winding and secondary winding. For example, the first insulating element comprises the first and second receiving openings, from which the first and second receiving regions extend into the first insulating element. In particular, the first and second receiving openings are arranged on opposite sides of the first insulating element.

[0060] The first insulating element may be tubular. In particular, the first insulating element according to the second preferred embodiment corresponds to the first tube according to the first preferred embodiment. The first insulating element is preferably electrically insulating and comprises an electrically insulating material.

[0061] In a further development of the device according to the second preferred embodiment, the device comprises a second insulating element in which the third and fourth receiving areas and the second partition wall are arranged. In particular, the first insulating element and the second insulating element are connected exclusively via the transformer core. This means, in particular, that there is no direct mechanical connection between the first insulating element and the second insulating element.

[0062] For example, the second insulating element comprises the third and fourth receiving openings, from which the third and fourth receiving regions extend into the second insulating element. In particular, the third and fourth receiving openings are arranged on opposite sides of the second insulating element.

[0063] The second insulating element may be tubular. In particular, the second insulating element according to the second preferred embodiment corresponds to the second tube according to the first preferred embodiment.

[0064] The second insulating element is preferably electrically insulating and comprises an electrically insulating material. Preferably, the first and second insulating elements comprise the same material.

[0065] In a further development of the device according to the second preferred embodiment, the device comprises a third insulating element in which the fifth and sixth receiving regions and the third partition wall are arranged. In particular, the third insulating element is connected to the first and / or second insulating element exclusively via the transformer core. This means in particular that there is no direct mechanical connection between the third insulating element and / or the first insulating element and / or the second insulating element. For example, the third insulating element comprises the fifth and sixth receiving openings from which the fifth and sixth receiving regions extend into the third insulating element. In particular, the fifth and sixth receiving openings are arranged on opposite sides of the third insulating element.

[0066] The third insulating element may be tubular. In particular, the third insulating element according to the second preferred embodiment corresponds to the third tube according to the first preferred embodiment.

[0067] The third insulating element is preferably electrically insulating and comprises an electrically insulating material. Preferably, the first, second, and third insulating elements comprise the same material.

[0068] Preferably, the first insulating element and / or the second insulating element and / or the third insulating element are each separate elements between which there is no direct mechanical connection. For example, the first, second, and third insulating elements are individual parts. In particular, the first insulating element and / or the second insulating element are connected to one another via the transformer core.

[0069] If features or combinations of features are disclosed here and below with regard to one of the receiving regions or one of the insulating elements, these features and combinations of features are also deemed to be disclosed for the other receiving regions and insulating elements, even if this is not explicitly mentioned in the context of the disclosure of the said feature. In a further development of the device according to the second preferred embodiment, the first and / or second receiving region has a first contour which is similar to a second contour of the first and / or second limb of the transformer core. For example, the first receiving region has a first contour which is similar to a second contour of the first limb. Alternatively or additionally, the second receiving region has a second contour which is similar to a second contour of the second limb.The term "similar" here refers in particular to similarity in the mathematical sense.

[0070] The first contour can be seen in particular in a section through the first insulating element perpendicular to the main direction of extension. Alternatively or additionally, the first contour can be seen, for example, in view of the first or second receiving area. The first contour is predetermined, for example, by the corresponding receiving opening.

[0071] The first contour is, for example, rectangular or square. In other words, the first or second receiving opening has a rectangular or square contour.

[0072] The first contour is in particular similar to the second contour, which can be seen through a cross-section of the first leg or second leg of the transformer core. The second contour is preferably rectangular or square and has a shape and size such that the corresponding leg can be inserted into the corresponding receiving opening. There is preferably only a small gap between the leg and the associated receiving opening. The first and second receiving openings are preferably designed such that the first and second receiving openings can be filled essentially completely by legs of the transformer core.

[0073] The device preferably has a length of at least one creepage distance required for the transformer. More preferably, the first insulating element, the second and the third insulating element also have a corresponding length. Since, during insulation coordination, the first potential and the second potential are separated along the first and optionally the second and third partition walls, a creepage distance runs in particular along the first or second and third insulating elements. By appropriately dimensioning the device or the insulating elements, a creepage distance can be maintained and the transformer which has the device described here can satisfy the required safety standards.

[0074] The first partition wall and the optional second and third partition walls preferably have a thickness of between 0.1 mm and 2 mm inclusive. It is also possible for the thickness to be up to 5 mm or more. The thickness is measured in particular parallel to the main direction of extension of the device or insulating elements. With such a thickness, electrical insulation of the halves of the transformer core can be ensured and, at the same time, magnetic coupling between the halves can be achieved. In particular, the device according to the second preferred embodiment furthermore has the same features, effects and advantages as the device of the first preferred embodiment and vice versa.

[0075] Furthermore, a transformer is specified. The transformer comprises, in particular, a device described here or an insulating body described here for accommodating a transformer core. This means that all features disclosed for the device or the insulating body are also disclosed for the transformer, and vice versa.

[0076] According to a first preferred embodiment of the transformer, the transformer comprises a device or an insulating body according to the first preferred embodiment of the device. In the following description of the first preferred embodiment of the transformer, the device can therefore also be referred to as an insulating body.

[0077] The transformer comprises a paired transformer core having a first half and a second half. Each half of the transformer core has at least one first leg. The halves of the transformer core are coupled to one another, in particular via the first legs. The first leg of the first half of the transformer core is arranged in the first receiving region of the insulating body, and the first leg of the second half of the transformer core is arranged in the second receiving region of the insulating body. The transformer core is formed, in particular, with a ferrite or a metal such as iron. In particular, the first legs of the halves of the transformer core are arranged in the first tube and insulated from one another by the first partition wall.

[0078] For example, each half of the transformer core has three legs. The first leg forms a center leg, and the second and third legs form side legs of each half of the transformer core. The second leg of the first half of the transformer core is arranged in a third receiving area of ​​the insulating body, and the second leg of the second half of the transformer core is arranged in a fourth receiving area of ​​the insulating body. In other words, the second legs of the transformer core are inserted into the second tube and insulated from one another by the second partition wall. Preferably, the third leg of the first half of the transformer core is arranged in a fifth receiving area of ​​the insulating body, and the third leg of the second half of the transformer core is arranged in a sixth receiving area of ​​the insulating body.In other words, the third legs of the transformer core are inserted into the third tube and electrically insulated from each other by means of the third partition.

[0079] The transformer core is in particular an E-core.

[0080] The transformer preferably comprises a primary winding and a secondary winding, which surround at least one leg of the transformer core in a winding region of the insulation body. In particular, the primary winding and the secondary winding surround the transformer core on a coil body.

[0081] If the transformer core is arranged around an E-core, the primary and secondary windings are preferably arranged around the first leg, i.e. the middle leg.

[0082] Alternatively, it is possible for the primary and secondary windings to be arranged around different legs. In this case, the transformer core may be a U-shaped core, and the insulation body may comprise only a first and a second tube.

[0083] According to a further training of the first preferred

[0084] In one embodiment, the first half and the second half of the transformer core are fixed, for example, in the first and second receiving areas of the first tube by means of an adhesive. In other words, the transformer cores are glued into the tubes of the insulation body.

[0085] Alternatively or additionally, it is possible for the halves of the transformer core to be fixed in the first and second receiving areas by means of another suitable fixing means. For example, such a fixing means is a tape or a clamp or the like.

[0086] According to a second preferred embodiment of the transformer, the transformer comprises a device according to the second preferred embodiment of the device. Furthermore, the transformer comprises a transformer core with at least one first leg and at least one second leg. The transformer comprises a primary winding and a secondary winding. The first leg of the transformer core is arranged in the first receiving area of ​​the device and the second leg is arranged in the second receiving area. The primary winding and secondary winding are wound around the device. In particular, the primary winding is arranged at least partially between the device and the secondary winding. Alternatively, the secondary winding can be arranged at least partially between the device and the primary winding.

[0087] The primary winding may be the first winding and the secondary winding may be the second winding. Alternatively, the primary winding may be the second winding and the secondary winding may be the first winding.

[0088] The transformer core is preferably a paired transformer core and comprises, in particular, a first half and a second half. The first leg is, in particular, assigned to the first half, and the second leg is, in particular, assigned to the second half. The halves of the transformer core are coupled to one another, in particular, via the legs.

[0089] The first leg according to the second preferred

[0090] The first preferred embodiment of the transformer corresponds in particular to the first leg of the first half according to the first preferred embodiment of the transformer. The second leg according to the second preferred embodiment of the transformer thus corresponds in particular to the first leg of the second half according to the first preferred embodiment of the transformer.

[0091] In particular, the first leg and the second leg are inserted into a first insulating element of the device, which has the first and second receiving areas.

[0092] The transformer core comprises in particular a ferrite or a metal such as iron.

[0093] Preferably, each half of the transformer core has three legs. A third leg is in particular assigned to the first half and arranged in a third receiving area of ​​the device. A fourth leg is in particular assigned to the second half and arranged in a fourth receiving area of ​​the device. A fifth leg is in particular assigned to the first half and arranged in a fifth receiving area of ​​the device. A sixth leg is in particular assigned to the second half and arranged in a sixth receiving area of ​​the device.

[0094] The third leg and fourth leg are arranged, for example, in the second insulating element and electrically separated by the second partition wall. The third leg and fourth leg are arranged, for example, in the third insulating element and electrically separated by the third partition wall.

[0095] The first insulating element and the second and / or third insulating element are preferably each separate elements. This means in particular that the insulating elements are not connected to each other via a mechanical connection, but are only connected via the transformer core. The third leg according to the second preferred

[0096] Embodiment of the transformer corresponds in particular to the second leg of the first half according to the first preferred embodiment of the transformer. The fourth leg according to the second preferred embodiment of the transformer corresponds in particular to the second leg of the second half according to the first preferred embodiment of the transformer. The fifth leg according to the second preferred embodiment of the transformer corresponds in particular to the third leg of the first half according to the first preferred embodiment of the transformer. The sixth leg according to the second preferred embodiment of the transformer thus corresponds in particular to the third leg of the second half according to the first preferred embodiment of the transformer.

[0097] The transformer core is, in particular, an E-core. In this case, the primary winding and secondary winding are preferably arranged around the first leg and second leg, or around the first insulating element into which the first and second legs are inserted. However, it is also possible for the primary winding and secondary winding to be arranged around a different insulating element.

[0098] According to a further development of the second preferred embodiment, the first leg and the second leg of the transformer core are fixed, for example, in the first and second receiving areas by means of an adhesive. In other words, the transformer cores are glued into the insulating elements of the device. Alternatively or additionally, it is possible for the halves of the transformer core to be fixed in the first and second receiving areas by means of another suitable fixing means. For example, such a fixing means is a tape or a clip or the like.

[0099] In particular, the transformer according to the second preferred embodiment has the same features, effects and advantages as the transformer of the first preferred embodiment and vice versa.

[0100] According to one embodiment, which is in particular a further development of the first and / or second preferred embodiment of the transformer, the transformer further comprises a first electrical contact point and at least one second electrical contact point. The first electrical contact point is in particular electrically conductively connected to the primary winding, and the second electrical contact point is in particular electrically conductively connected to the secondary winding.

[0101] The transformer can be connected to a primary side via the first electrical contact point. The transformer can be connected to a secondary side via the second electrical contact point.

[0102] The first and second contact points are each formed, for example, with at least two connection pins and / or two soldering points. In the region of the contact points, for example, a wire of the primary or secondary winding is stripped and electrically conductively connected to the contact point. In particular, a first potential is assigned to the first half of the transformer core and a second potential is assigned to the second half of the transformer core. The first potential is, in particular, likewise assigned to the first electrical contact point and the second potential is, in particular, likewise assigned to the second electrical contact point. In other words, the first electrical potential is assigned to the primary side and the second electrical potential is assigned to the secondary side.

[0103] With insulation coordination, a boundary between the first and second potentials runs along the separating walls, and not, as in conventional transformers, between the contact points and the transformer core. Thus, unlike conventional transformers, the transformer described here does not require an insulation distance such as a creepage distance between the contact points and the transformer core.

[0104] In the transformer described here according to the first or second preferred embodiment, however, the creepage distance runs along the insulating body or the device, in particular along the tubes or the insulating elements. Advantageously, this means that the distance between the contact points and the transformer core does not have to be artificially increased, for example by bulges or indentations in an insulator between the transformer core and the connection points. This means that the transformer described here can be manufactured in a particularly compact and simple manner. Complex structural measures that increase the distance between the transformer core and the contact points can also be dispensed with.In particular, a predetermined creepage distance runs between the first potential and the second potential on at least the first tube of the insulation body or on the device or at least on the first insulating element of the device. Preferably, the first tube and optionally the second and / or third tube are designed such that the predetermined creepage distance is maintained. Preferably, the first insulating element and optionally the second and / or third insulating element are designed such that the predetermined creepage distance is maintained. The creepage distance is specified in particular by safety standards, such as, for example, industry standards.

[0105] For example, a distance, in particular a geometric distance, between the transformer core and the first electrical contact point is smaller than the specified creepage distance. Furthermore, a distance between the transformer core and the second electrical contact point is preferably also smaller than the specified creepage distance. This allows the transformer to be designed to be compact. This is possible in particular because minimum distances, such as those required to maintain an insulation distance, are no longer required because the device or the insulating elements or pipes already ensure the required distances.

[0106] In particular, a device or insulation body described here and a transformer described here comprise features according to the following aspects: 1. Insulation body for receiving a transformer core for a transformer having a paired transformer core comprising at least one first tube with a first receiving area and an opposite second receiving area and a first partition wall which separates the first receiving area from the second receiving area, wherein

[0107] - the first receiving area is adapted to receive a first leg of a first half of the transformer core,

[0108] - the second receiving area is adapted to receive a first leg of a second half of the transformer core, and

[0109] - the first tube is formed with an electrically insulating material.

[0110] 2. Insulation body according to aspect 1, further comprising at least one second tube with a third receiving area and a fourth receiving area and a second partition wall separating the third receiving area from the fourth receiving area, wherein

[0111] - the third receiving area is adapted to receive a second leg of a first half of the transformer core, and

[0112] - the fourth receiving area is adapted to receive a second leg of a second half of the transformer core.

[0113] 3. Insulation body according to aspect 1 or 2, further comprising at least one third tube with a fifth receiving area and a sixth receiving area and a third partition wall separating the fifth receiving area from the sixth receiving area, wherein

[0114] - the fifth receiving area is adapted to receive a third leg of a first half of the transformer core, and

[0115] - the sixth receiving area is adapted to receive a third leg of a second half of the transformer core.

[0116] 4. Insulating body according to one of the preceding aspects, further comprising a winding region, wherein the insulating body in the winding region is configured to accommodate a primary winding and / or a secondary winding.

[0117] 5. Insulating body according to aspect 4, wherein at least the first tube has the winding region.

[0118] 6. Insulating body according to one of the preceding aspects, wherein at least the first tube is formed with an electrically insulating plastic.

[0119] 7. Insulating body according to one of the preceding aspects, wherein in a section perpendicular to a main extension direction of the first tube, at least the first tube in the first and / or second receiving region has a first contour which is similar to a second contour of the first leg of the first and / or second half of the transformer core.

[0120] 8. Insulating body according to one of the preceding aspects, wherein at least the first tube has a length of at least one creepage distance required for the transformer.

[0121] 9. Insulating body according to one of the preceding aspects, wherein at least the first partition wall has a thickness between 0.1 mm and 2 mm inclusive.

[0122] 10. Transformer comprehensive

[0123] - an insulating body according to one of the preceding aspects,

[0124] - a paired transformer core having a first half and a second half, wherein

[0125] - each half of the transformer core has at least a first leg, and

[0126] - the first leg of the first half of the transformer core is arranged in the first receiving area of ​​the insulating body and the first leg of the second half of the transformer core is arranged in the second receiving area of ​​the insulating body.

[0127] 11. Transformer according to aspect 10, wherein

[0128] - each half of the transformer core has three legs,

[0129] - the second leg of the first half of the transformer core is arranged in a third receiving area of ​​the insulating body and the second leg of the second half of the transformer core is arranged in a fourth receiving area of ​​the insulating body, and

[0130] - the third leg of the first half of the transformer core is arranged in a fifth receiving area of ​​the insulating body and the third leg of the second half is arranged in a sixth receiving area of ​​the insulating body. 12. Transformer according to aspect 11, wherein the

[0131] Transformer core is an E-core.

[0132] 13. Transformer according to one of aspects 10 to 12, further comprising a primary winding and a secondary winding which surround at least one leg of the transformer core in a winding region of the insulation body.

[0133] 14. Transformer according to aspect 13, further comprising at least one first electrical contact point and at least one second electrical contact point, wherein the first electrical contact point is electrically conductively connected to the primary winding and the second contact point is electrically conductively connected to the secondary winding.

[0134] 15. Transformer according to aspect 14, wherein a first potential is assigned to the first electrical contact point and the first half of the transformer core and a second potential is assigned to the second electrical contact point and the second half of the transformer core.

[0135] 16. Transformer according to aspect 15, wherein a predetermined creepage distance between the first potential and the second potential runs on the at least first tube of the insulating body.

[0136] 17. Transformer according to aspect 15 or 16, wherein

[0137] - a distance between the transformer core and the first electrical contact point is smaller than a predetermined creepage distance, and - a distance between the transformer core and the second electrical contact point is smaller than a predetermined creepage distance.

[0138] 18. Transformer according to any one of aspects 10 to 17, wherein the first half and the second half of the transformer core are each fixed at least in the first and second receiving areas with an adhesive.

[0139] Further advantages and advantageous configurations and further developments of the insulating body for accommodating a transformer core and the transformer will become apparent from the exemplary embodiments presented below in conjunction with schematic drawings. Identical, similar, and similarly acting elements are provided with the same reference numerals in the figures. The figures and the relative sizes of the elements shown in the figures are not necessarily to scale. Rather, individual elements may be exaggerated for clarity and / or clarity.

[0140] They show:

[0141] Figures 1 to 5 show various views of a device or an insulating body for receiving a transformer core according to an embodiment,

[0142] Figure 6 is a sectional view of a device for receiving a transformer core described here, in which a transformer core is inserted, according to a second embodiment, and Figure 7 is a side view of a device described here

[0143] Transformer according to an embodiment.

[0144] Figures 1 to 3 show a device 1 for receiving legs of a transformer core or an insulating body 1 for receiving a transformer core for a transformer according to a first exemplary embodiment in a sectional view. A sectional plane is perpendicular to a main extension direction of a first electrically insulating element 2 or a first tube 2.

[0145] The device 1 or the insulating body 1 comprises a first electrically insulating element 2 or a first tube 2 with a first receiving opening 24 and a second receiving opening 25 located opposite in the main direction of extent of the first insulating element 2. Starting from the receiving openings 24, 25, a first receiving region 21 and a second receiving region 22 extend into the interior of the first insulating element 2 or the first tube 2. The first receiving region 21 is separated from the second receiving region 22 by a first partition wall 23. A first leg 111 or a first leg 111 of a first half 11 of a paired transformer core 10 can be inserted into the first receiving region 21 (Figures 2 and 3). A second leg 121 or a first leg 121 of a second half 12 of the transformer core 10 can be inserted into the second receiving area 22.The first leg 111 or the first leg 111 of the first half 11 and the second leg 121 or the first leg 121 of the second half 12 are separated from one another by the first partition wall 23. The first insulating element 2 or the first tube 2 is formed with an electrically insulating material. Preferably, the first insulating element 2 or the first tube 2 is formed with a plastic. A thickness of the first partition wall 23, measured parallel to the main direction of extension of the first insulating element 2 or the tube 2, is between 0.1 mm and 2 mm. A greater thickness of the first partition wall 23 is also possible.

[0146] Due to the electrical insulation of the first half 11 and the second half 12 of the transformer core 10 by the first partition wall 23, different potentials can be assigned during insulation coordination of the transformer 100, to which the transformer core 10 and the insulation body 1 belong. An insulation barrier is thus determined by the first insulating element 2 or first tube 2. Insulation distances, which must be strictly adhered to for electrical safety reasons, can thus be predetermined by the first insulating element 2 or the first tube 2. The first insulating element 2 or the first tube 2 can in this case be dimensioned, for example, such that a creepage distance 8 between the first and second potential is maintained by a dimension of the first insulating element 2 or the first tube 2.In this case, maintaining insulation distances between the transformer core 10 and active parts of the transformer 100 is no longer mandatory. Active parts are understood to be parts that are not electrically insulated, for example, by an insulating sheath or coating. These active parts are, for example, connection pins or solder joints or stripped wire ends of a winding of the transformer 100.

[0147] If the transformer core 10 has a plurality of legs, as illustrated, for example, in Figure 6, then in particular all legs can be arranged accordingly in insulating elements 2, 3, 4 or tubes 2, 3, 4, such that the creepage distance between the first and second potential is maintained by these elements 2, 3, 4 or tubes 2, 3, 4. The insulating elements 2, 3, 4 or tubes 2, 3, 4 in particular have the same or similar features and technical properties as the first insulating element 2 or the first tube 2.

[0148] Figure 4 shows a view of the first receiving opening 24 of the first insulating element 2 or the first tube 2. Figure 5 shows a perspective view of the first receiving opening 24. A contour of the first receiving region 21 or the first receiving opening 24 is rectangular or square. Preferably, a second contour of the first leg 111 of the transformer core 10 is also square or rectangular.

[0149] The second contour results, for example, from a section through the first leg 111 parallel to the receiving opening 24. The first leg 111 can in particular be inserted into the receiving area 21 in a tight manner. This means that there is essentially no gap between the first insulating element 2 or the first tube 2 and the leg 111 after insertion. The first leg 111 preferably touches the first partition wall 23 when it is inserted into the first receiving opening 21. The first leg 111 preferably fills the first receiving opening 21 completely or essentially completely (Figure 3). The same applies analogously to the second leg 121 or the first leg 121 of the second half 12 of the transformer core as well as to further legs of the transformer core 10 if these can be inserted into further insulating elements or tubes.

[0150] Figure 6 shows a sectional view of a device 1 described here or of an insulating body 1 described here, into which a first half 11 and a second half 12 of a paired transformer core 10 are inserted. The device 1 comprises three insulating elements 2, 3, 4 or three tubes 2, 3, 4, wherein the first insulating element 2 has a first receiving area 21 and a second receiving area 22. The second insulating element 3 has a third receiving area 31 and a fourth receiving area 32. The third insulating element 4 has a fifth receiving area 41 and a sixth receiving area 42. The first, third and fifth receiving areas 21, 31, 41 are separated from the second, fourth and sixth receiving areas 22, 32, 42 by a first, second and third partition wall 23, 33, 43, respectively.

[0151] The insulating elements 2, 3, 4 or tubes 2, 3, 4 are separate elements that are connected to each other only via the transformer core 10. In particular, there is no direct mechanical connection between the insulating elements 2, 3, 4 or the tubes 2, 3, 4. The transformer core 10 is a so-called E-core. A first leg 111 and a second leg 121, or first legs 111, 121 of the first and second halves 11, 12 of the transformer core 10, are also referred to as the center leg. A third leg 112 and fourth leg 122 or second leg 112, 122 of the first or second half 11, 12 of the transformer core 10 as well as a fifth leg 113 and a sixth leg 123 or third leg 113, 123 of the first or second half 11, 12 of the transformer core 10 are also referred to as side legs.The middle legs 111, 121 are inserted into the first insulating element 2 and the first tube 2, respectively. The side legs consisting of legs 112, 122 are inserted into the second insulating element 3 and the second tube 3, respectively. The further side legs consisting of legs 113, 123 are inserted into the third insulating element 4 and the third tube 4, respectively. The legs 111, 112, 121, 122, 113, 123 are each fixed in the associated insulating elements 2, 3, 4 and the associated tubes 2, 3, 4, for example, by means of an adhesive, a tape, a clamp, or another suitable fixation.

[0152] Thus, the first half 11 is electrically separated from the second half 12 of the transformer core 10 by the device 1 or the insulating body 1 or the tubes 2, 3, 4, in particular by the first, second and third partition walls 23, 33, 43.

[0153] In the case of isolation coordination, this can

[0154] Two potentials can be assigned to the transformer core 10. In particular, a first potential can be assigned to the first half 11 and a second potential to the second half 12. Insulation distances such as creepage distances 8 can be achieved by a suitable selection, for example, by appropriate dimensioning of the insulating elements 2, 3, 4 or the tubes 2, 3, 4. Furthermore, maintaining a creepage distance between active parts of the transformer 100 and the transformer core 10 is no longer mandatory in order to comply with electrical safety standards, since the insulating elements 2, 3, 4 or tubes 2, 3, 4 ensure compliance with the corresponding insulation distances.

[0155] The first insulating element 2 or the first tube 2 has a winding region 5. A primary winding 6 and a secondary winding 7 can be applied in the winding region 5. Voltage transformation can be achieved by the primary and secondary windings 6, 7. The primary winding 6 is assigned to a primary side, and the secondary winding 7 to a secondary side of the transformer 100. The device 1 comprises, in particular, a coil former 9 in the region of the winding region 5. In particular, the first insulating element 2 or the first tube 2 thus forms part of the coil former 9.

[0156] Figure 7 shows a side view of a transformer 100 described here according to an embodiment. The transformer 100 comprises an insulating body 1 and a transformer core 10, as explained in connection with Figure 6. The view in Figure 7 is of a side of the third insulating element 4 or the third tube 4, which is perpendicular to the receiving openings of the third insulating element 4 or the third

[0157] Pipe 4 is .

[0158] The transformer 100 comprises a primary and secondary winding 6, 7. The primary winding 6 is wound around the device 1 or the second tube 2, and the secondary winding 7 is wound around the primary winding 6. This means that the primary winding 6 is arranged between the device 1 or the first tube 2 and the secondary winding 7.

[0159] The transformer 100 further has a first electrical contact point 61 and a second electrical contact point 71. The first electrical contact point 61 is connected to a wire of the primary winding 6. The second electrical contact point 71 is connected to a wire of the secondary winding 7. The wires of the primary and secondary windings 6, 7 are coated with an insulator. In the region of the contact points 61, 71, the wires are stripped so that electrical contact can be made with the wires. Electrical contact with the wire of the primary winding 6 is preferably made in the region of the first contact point 61. Electrical contact with the wire of the secondary winding 7 is preferably made in the region of the second contact point 71.

[0160] The first and second electrical contact points 61, 71 each comprise, for example, at least two connection pins or at least two solder regions in which the transformer 100 can be electrically contacted externally. For example, the transformer 100 can be electrically conductively connected to a primary circuit via the first electrical contact points 61 and to a secondary circuit via the second electrical contact points 71. Furthermore, the transformer 100 comprises an insulator, which is part of the coil former 9, via which the transformer core 10 is carried and held.

[0161] A creepage distance 8 of the transformer 100, which is specified by safety standards, runs along the device 1 or the tubes 2, 3, 4 (shown in Figure 7 as an example using tube 4). The device 1 or the tubes 2, 3, 4 are dimensioned accordingly so that the creepage distance 8 satisfies the specified safety standards. Since the creepage distance 8 runs along the device 1 or the tubes 2, 3, 4, the transformer core 10 can be arranged closer to the electrical contact points 61, 71 than is the case with conventional transformers. Particularly large coil formers 9 or coil formers 9 that have bulges or incisions can advantageously be dispensed with. This advantageously allows the transformer 100 to be designed to be comparatively compact.

[0162] List of reference symbols

[0163] 1 device, insulation body

[0164] 2 first insulating element, first pipe

[0165] 3 second insulating element, second pipe

[0166] 4 third insulating element, third pipe

[0167] 5 Winding area

[0168] 6 Primary winding

[0169] 7 Secondary winding

[0170] 8 Creepage distance

[0171] 9 coil bodies

[0172] 10 transformer core

[0173] 11, 12 first, second half of the transformer core

[0174] 21, 22 first, second recording area

[0175] 23 first partition wall

[0176] 24, 25 first, second receiving opening

[0177] 31, 32 third, fourth recording area

[0178] 33 second partition wall

[0179] 41, 42 fifth, sixth recording area

[0180] 43 third partition wall

[0181] 61, 71 first, second electrical contact point

[0182] 111 first leg, first leg of the first half

[0183] 121 second leg, first leg of the second

[0184] half

[0185] 112 third leg, second leg of the first

[0186] half

[0187] 122 fourth leg, second leg of the second

[0188] half

[0189] 113 fifth leg, third leg of the first

[0190] half

[0191] 123 sixth leg, third leg of the second

[0192] half

Claims

Patent claims 1. Device (1) for receiving legs (111, 121) of a transformer core (10) comprising - a first receiving area (21) which is adapted to receive a first leg (111) of the transformer core (10), - a second receiving area (22) which is adapted to receive a second leg (121) of the transformer core (10), - the first receiving area (21) and the second receiving area (22) are separated by an electrically insulating first partition wall (23), and - the device (1) is designed for winding with a first winding and a second winding, wherein the first winding is arranged at least partially between the device (1) and the second winding.

2. Device (1) according to claim 1, wherein the first winding is a primary winding (6) and the second winding is a secondary winding (7).

3. Device (1) according to claim 1 or 2, further comprising - a third receiving area (31) which is adapted to receive a third leg (112) of the transformer core (10), - a fourth receiving area (32) adapted to receive a fourth leg (122) of the transformer core (10), and - the third receiving area (31) and fourth receiving area (32) are separated by an electrically insulating second partition wall (33).

4. Device (1) according to one of the preceding claims, further comprising - a fifth receiving area (41) adapted to receive a fifth leg (113) of the transformer core (10), - a sixth receiving area (42) adapted to receive a sixth leg (123) of the transformer core (10), and - the fifth receiving area (41) and sixth receiving area (42) are separated by an electrically insulating third partition wall (43).

5. Device (1) according to one of the preceding claims, further comprising a first insulating element (2) in which the first and second receiving areas (21, 22) and the first partition wall (23) are arranged, the first insulating element (2) being adapted for winding with the first winding and the second winding.

6. Device (1) according to claim 5 in conjunction with claim 3, further comprising a second insulating element (3) in which the third and fourth receiving areas (31, 32) and the second partition wall (33) are arranged, wherein the first and second insulating elements (2, 3) are connected exclusively via the transformer core (10).

7. Device (1) according to claim 6 in conjunction with claim 4, further comprising a third insulating element (4) in which the fifth and sixth receiving areas (21, 22) and the third partition wall (23) are arranged, wherein the third insulating element (4) is connected to the first and / or second insulating element (2, 3) exclusively via the transformer core (10).

8. Device (1) according to one of the preceding claims, wherein the first and / or second receiving region (21, 22) has a first contour which is similar to a second contour of the first leg (111) and / or the second leg (121) of the transformer core (10).

9. Device (1) according to one of the preceding claims, wherein the device (1) has a length of at least one creepage distance (8) required for the transformer (100).

10. Device (1) according to one of the preceding claims, wherein at least the first partition wall (23) has a thickness between 0.1 mm and 2 mm inclusive.

11. Transformer (100) comprising - a device (1) according to one of the preceding claims, - a transformer core (10) with at least a first leg (111) and a second leg (121), and a primary winding (6) and a secondary winding (7), where - the first leg (111) of the transformer core (10) is arranged in the first receiving area (21) and the second leg (121) is arranged in the second receiving area (22), - the primary winding (6) and the secondary winding (7) are wound around the device (1), and - the primary winding (6) is arranged at least partially between the device (1) and the secondary winding (7).

12. Transformer (100) according to claim 11, wherein - the transformer core (10) comprises a first half (11) and a second half (12), - the first leg (111) is assigned to the first half (11) and the second leg (121) is assigned to the second half (12).

13. Transformer (100) according to claim 12, wherein - each half (11, 12) of the transformer core (10) has three legs (111, 112, 113, 121, 122, 123), - a third leg (112) is assigned to the first half (11) and is arranged in a third receiving area (31) of the device (1), - a fourth leg (122) is assigned to the second half (12) and is arranged in a fourth receiving area (32) of the device (1), - a fifth leg (113) is assigned to the first half (11) and is arranged in a fifth receiving area (41) of the device (1), - a sixth leg (123) is assigned to the second half (12) and is arranged in a sixth receiving area (42) of the device (1).

14. Transformer (100) according to claim 13, wherein the transformer core (10) is an E-core.

15. Transformer (100) according to one of claims 11 to 14, further comprising at least one first electrical contact point (61) and at least one second electrical contact point (71), wherein the first electrical contact point (61) is electrically conductively connected to the primary winding (6) and the second contact point (71) is electrically conductively connected to the secondary winding (7).

16. Transformer (100) according to claim 15, wherein the first electrical contact point (61) and the first half (11) of the transformer core (10) are assigned a first potential and the second electrical contact point (71) and the second half (12) of the transformer core (10) are assigned a second potential.

17. Transformer (100) according to claim 16, wherein a predetermined creepage distance (8) runs between the first potential and the second potential on the device (1).

18. Transformer (100) according to claim 16 or 17, wherein - a distance between the transformer core (10) and the first electrical contact point (61) is smaller than a predetermined creepage distance (8), and - a distance between the transformer core (10) and the second electrical contact point (71) is smaller than a predetermined creepage distance (8).

19. Transformer (100) according to one of claims 11 to 18, wherein the first leg (111) and the second leg (121) of the transformer core (10) are each fixed in the first and second receiving area (21, 22) with an adhesive.

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