Transformer assembly, transformer and power converter

Abstract

The embodiment of the utility model provides a transformer assembly, a transformer and a power converter. A transformer assembly is used for a transformer and comprises a current transformer and a fixing piece. The fixing piece comprises a first fixing part and a second fixing part, the first fixing part is connected with the second fixing part, the first fixing part is used for fixing at least part of the transformer winding, the second fixing part is provided with a groove, and the groove is used for containing at least part of the current transformer. According to the transformer assembly provided by the embodiment of the invention, by arranging the first fixing part and the second fixing part, at least part of the transformer winding and the current transformer can be arranged respectively; the groove is formed in the second fixing part, at least part of the current transformer can be contained, the probability of insulation failure can be reduced, and meanwhile the size of the transformer assembly can be reduced.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and particularly to a transformer assembly, a transformer, and a power converter. Background Art

[0002] A transformer is a device that changes the AC voltage through the principle of electromagnetic induction and can realize the change of the voltage between the input end and the output end. A transformer generally includes a primary winding, a secondary winding, and a magnetic core. According to the ratio of the primary winding and the secondary winding of the transformer, the corresponding relationship between the input voltage and the output voltage can be determined.

[0003] In some application fields of transformers, it is necessary to set up current transformers to measure the input or output current of the transformer. Therefore, in the related art, the current transformer and the transformer are integrally arranged.

[0004] However, integrating the current transformer with the transformer in the related art has a certain risk of insulation failure. Summary of the Invention

[0005] Based on this, embodiments of the present application provide a transformer assembly, a transformer, and a power converter that reduce the risk of insulation failure.

[0006] A first aspect of embodiments of the present application provides a transformer assembly for a transformer, and the transformer assembly includes:

[0007] A current transformer;

[0008] A fixing member, including a first fixing portion and a second fixing portion, the first fixing portion is connected to the second fixing portion, the first fixing portion is used to fix at least part of the transformer winding, and the second fixing portion is provided with a groove for accommodating at least part of the current transformer.

[0009] In some embodiments, the second fixing portion has an assembly surface, and the groove is provided on a surface of the second fixing portion opposite to the assembly surface.

[0010] In some embodiments, the second fixing portion has an assembly surface, and the groove is provided on the assembly surface of the second fixing portion.

[0011] In some embodiments, the second fixing portion is configured on a circuit board, and the assembly surface faces the circuit board.

[0012] In some embodiments, the current transformer includes a transformer winding, the transformer winding includes a first lead-out end, and a first distance between the transformer winding and the first lead-out end is greater than or equal to the safety distance.

[0013] In some embodiments, the second fixing part includes a first pin, the first lead-out end is electrically connected to the first pin, and the second distance between the transformer winding and the first pin is greater than or equal to the safety distance.

[0014] In some embodiments, the current transformer includes a transformer winding, at least part of the surface of the transformer winding is coated with an insulating member, the transformer winding includes a second lead-out end, the transformer winding includes a first lead-out end, and the third distance between the second lead-out end and the first lead-out end is greater than or equal to the safety distance.

[0015] In some embodiments, the transformer winding further includes a winding body, the surface of the winding body is coated with the insulating member, the second fixing part includes a first pin and a second pin, the first lead-out end is electrically connected to the first pin, the distance between the winding body and the first pin is a fourth distance, the second lead-out end is electrically connected to the second pin, the distance between the winding body and the second pin is a fifth distance, and the sum of the fourth distance and the fifth distance is greater than or equal to the safety distance.

[0016] In some embodiments, the current transformer includes a magnetic core, and the shape of the magnetic core is a ring.

[0017] In some embodiments, the groove is a ring structure, and the magnetic core can be cooperatively arranged in the groove.

[0018] The transformer assembly provided by the embodiments of the present application can respectively arrange at least part of the transformer winding and the current transformer by providing the first fixing part and the second fixing part; by providing a groove in the second fixing part, at least part of the current transformer can be accommodated, which is beneficial to reducing the probability of insulation failure and is also beneficial to reducing the volume of the transformer assembly.

[0019] The second aspect of the embodiments of the present application provides a transformer, including a transformer magnetic core, a transformer winding, and the transformer assembly according to any one of the above.

[0020] The third aspect of the embodiments of the present application provides a power converter, the power converter includes a circuit board and the transformer described above, and the transformer is electrically connected to the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the first perspective of the transformer assembly in the first embodiment of the present application.

[0022] Figure 2 is Figure 1 The enlarged schematic diagram at position A in

[0023] Figure 3Schematic diagram of the second perspective of the transformer assembly in the first embodiment of the present application.

[0024] Figure 4 Schematic diagram of the second perspective of the transformer assembly in the second embodiment of the present application.

[0025] Figure 5 Schematic diagram of the third perspective of the transformer in one embodiment of the present application.

[0026] Figure 6 Schematic diagram of the fourth perspective of the transformer assembly in the third embodiment of the present application.

[0027] Figure 7 Schematic diagram of the fifth perspective of the transformer assembly in the fourth embodiment of the present application.

[0028] Figure 8 Schematic diagram of the fifth perspective of the transformer assembly in the fifth embodiment of the present application.

[0029] Explanation of reference numerals

[0030] 10. Transformer assembly; 11. Current transformer; 111. Transformer winding; 1111. Winding body; 1112. Second lead-out end; 112. Magnetic core; 12. Fixing member; 121. First fixing portion; 122. Second fixing portion; 122a. Groove; 1221. First pin; 1222. Second pin; 122b. Through hole; 12a. Assembly surface; 20. Transformer; 21. Transformer winding; 211. First lead-out end; 22. Transformer magnetic core. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if terms such as "thickness", "upper", "top", "bottom", "inner", "outer", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "a plurality" appears, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "up" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0037] The transformer includes a transformer assembly and a transformer winding wound around the transformer assembly, and the current in the transformer winding is usually detected by a current transformer.

[0038] In the traditional detection process, one way is to separately arrange the current transformer and the transformer winding, but this way is likely to result in a complex equipment structure and a large volume. Another way is to integrate the current transformer and the transformer winding to reduce the equipment volume. However, since the wire of the transformer winding has a relatively high voltage while the voltage in the current transformer is relatively low, there is a voltage difference between them. Therefore, when the voltage difference between the transformer winding and the current transformer is large and the distance is close after integration, the air and insulating materials between the transformer winding and the current transformer can be broken down, causing the risk of insulation failure and short circuits of the transformer winding and the current transformer respectively.

[0039] See Figure 1 , Figure 2 and Figure 3 , based on this, aiming at the problem of insulation failure in the transformer after the integration of the traditional transformer winding and the current transformer, the embodiment of the present application provides a transformer assembly 10 for use in a transformer 20, and the transformer 20 includes a transformer winding 21.

[0040] The transformer assembly 10 includes a current transformer 11 and a fixing member 12. The fixing member 12 includes a first fixing portion 121 and a second fixing portion 122 connected to the first fixing portion 121. The first fixing portion 121 is used to fix at least part of the transformer winding 21 to facilitate the arrangement of the transformer winding 21 around the magnetic core or iron core of the transformer 20.

[0041] The second fixing portion 122 is provided with a groove 122a, and the groove 122a is used to accommodate at least part of the current transformer 11. In the case where the volume of the transformer assembly 10 remains unchanged, it is beneficial to increase the distance between the current transformer 11 and the transformer winding 21, thereby reducing the probability of insulation failure. Moreover, when at least part of the current transformer 11 is accommodated in the inner wall of the groove 122a, it can be blocked by the inner wall of the groove 122a to increase the distance between the part of the current transformer 11 arranged in the groove 122a and the transformer winding 21, thus also reducing the probability of insulation failure between the current transformer 11 and the transformer winding 21. In addition, when the distance between the current transformer 11 and the transformer winding 21 meets the safety distance, by arranging the current transformer 11 in the groove 122a, on the one hand, it can reduce the space occupied by the current transformer 11 outside the groove 122a, and thus can reduce the overall volume of the transformer assembly 10. On the other hand, it is beneficial to shorten the distance between the groove 122a and the transformer winding 21, thereby reducing the volume of the transformer assembly 10.

[0042] It should be noted that the transformer winding 21 is formed by winding a first conductive wire around the magnetic core or iron core of the transformer, and an insulating member is coated on the surface of the first wire to reduce the probability of short circuit caused by insulation failure of the first wire itself. The specific form of coating the insulating member is not limited. For example, insulating paint is coated on the surface of the first wire to form the insulating member; or, insulating plastic is coated on the surface of the first wire to form the insulating member.

[0043] It should be noted that a part of the transformer winding 21 is arranged in the first fixing part 121 for voltage transformation, and the other part is arranged in the second fixing part 122 to facilitate the electrical connection between the transformer winding 21 and external components. It can be understood that the part of the transformer winding 21 arranged in the second fixing part does not need to be wound, and the current transformer 11 is sleeved in the part of the transformer winding 21 in the second fixing part to detect the current in the transformer winding 21.

[0044] In a specific embodiment of the present application, it can be understood that the materials for making the first fixing part 121 and the second fixing part 122 have high resistance. The specific materials for making the first fixing part 121 and the second fixing part 122 are not limited. For example, phenolic plastic, flame-retardant nylon, flame-retardant PET (Polyethylene Terephthalate), flame-retardant PBT (Polybutylene Terephthalate), LCP (Liquid Crystal Polymer), etc.

[0045] Please continue to refer to Figure 1 With Figure 2 , in some embodiments, the current transformer 11 is entirely accommodated in the groove 122a, which is beneficial to reducing the external space occupied by the current transformer 11, and thus reducing the volume of the transformer assembly 10. Among them, the current transformer 11 being entirely accommodated in the groove 122a means that the groove edge of the groove 122a protrudes from the top surface of the current transformer 11.

[0046] It can be understood that the shape of the groove 122a can be adapted to the shape of the current transformer 11 accommodated therein, as long as it satisfies that the current transformer 11 can be accommodated in the groove 122a to accommodate the current transformer 11.

[0047] Please continue to refer to Figure 1 , Figure 2 With Figure 3 , in some embodiments, the second fixing part 122 has an assembly surface 12a, where the assembly surface 12a refers to the surface of the second fixing part 122 facing the external component when the second fixing part 122 is assembled to the external component.

[0048] The groove 122a is arranged on the side of the second fixing portion 122 opposite to the mounting surface 12a. Correspondingly, the current transformer 11 is also arranged on the side of the second fixing portion 122 opposite to the mounting surface 12a. Therefore, when the current transformer 11 is connected to an external component, the portion of the second fixing portion 122 is spaced between the two to increase the resistance between the portion of the current transformer 11 arranged in the groove 122a and the transformer winding 21, thereby reducing the probability of insulation failure between the current transformer 11 and the transformer winding 21; at the same time, the portion of the second fixing portion 122 is spaced between the current transformer 11 and the external component, which can reduce the probability of insulation failure between the current transformer 11 and the circuit board; in the direction perpendicular to the mounting surface, the external component can arrange the circuit at the position corresponding to the current transformer 11, thereby improving the utilization rate of the external component.

[0049] It can be understood that the external component has a circuit, and the circuit in the external component has current and a certain voltage.

[0050] In some other embodiments, see Figure 4 The second fixing portion 122 has an assembly surface 12a, and the groove 122a is arranged on the assembly surface 12a of the second fixing portion 122. It can be understood that the assembly surface 12a is arranged toward the external components, and the current transformer 11 is located in the space formed between the wall surface of the groove 122a and the assembly surface 12a. In this way, on the side away from the assembly surface 122a, the space occupied by the current transformer 11 can be reduced, which is convenient for the arrangement of other components.

[0051] In some embodiments, the external component is a circuit board (a circuit board refers to a substrate used for mounting electronic or electrical components and connecting circuits, and a conductive line is provided on the circuit board), and the second fixing portion 122 is configured on the circuit board, and the assembly surface 12a is set toward the circuit board, thereby facilitating the electrical connection between the transformer winding 21 and the current transformer 11 and the external component through the line on the circuit board.

[0052] Specifically, the second fixing portion 122 is disposed on the circuit board, the mounting surface 12a can be disposed toward the circuit board, and the groove 122a is disposed on a side of the second fixing portion 122 away from the mounting surface 12a. In other words, the current transformer 11 is disposed on a side of the second fixing portion 122 away from the mounting surface 12a. Therefore, a portion of the second fixing portion 122 is spaced between the current transformer 11 and the circuit board.

[0053] In this way, by arranging the current transformer 11 on the side away from the assembly surface 12a, a portion of the second fixing portion 122 is provided between the current transformer 11 and the circuit board, which is beneficial to reducing the probability of insulation failure between the current transformer 11 and the circuit board; in the direction perpendicular to the assembly surface, the circuit board can arrange the circuit at the position corresponding to the current transformer 11, thereby improving the utilization rate of the circuit board.

[0054] In some embodiments, see Figure 1 , Figure 2 and Figure 3 , the transformer winding 21 includes a first lead-out terminal 211. The current transformer 11 includes a transformer winding 111, and a first distance between the transformer winding 111 and the first lead-out terminal 211 is greater than or equal to the safety distance. It can be understood that the transformer winding 111 is formed by winding a second conductive wire. Since the voltage difference between each turn of the second wire is particularly small during winding, the second wire only needs to meet the functional insulation requirements, and the second wire may not be covered with an insulating member, so as to reduce the volume occupied by the transformer winding 111 and reduce the cost.

[0055] The first lead-out end 211 refers to an end of the transformer winding 21 that is electrically connected to an external component. It can be understood that the first lead-out end 211 is not covered with an insulating member to be electrically connected to an external component.

[0056] The first distance refers to the shortest distance between the transformer winding 111 and the first lead-out terminal 211 in space without being blocked. Figure 6 , Figure 6 Wherein L1 represents the shortest distance between the mutual inductor winding 111 and the first lead-out terminal 211 on a plane, to illustrate the approximate distance between the mutual inductor winding 111 and the first lead-out terminal 211, and the first distance is the expansion of L1 in space, and the first distance is greater than L1.

[0057] The safety distance refers to the minimum distance between two conductors required to meet the insulation requirements. It is understandable that the specific value of the safety distance is related to the voltage of the transformer winding 21 when it is working and the voltage of the current transformer 11 when it is working. The greater the voltage difference between the two when they are working, the greater the safety distance. In addition, it is understandable that when there is an insulator between the two conductors (insulator refers to an insulating medium other than air, such as glass, ceramic, etc.), it is difficult for the two conductors to cause a short circuit due to insulation failure due to the obstruction of the insulator, so the safety distance is easy to meet; and when there is no insulator blocking the two conductors, it is more likely to fail in insulation, break through the air and cause a short circuit, so it is more necessary to meet the safety distance.

[0058] Thus, by making the first distance between the mutual inductor winding 111 and the first lead-out end 211 greater than or equal to the safety distance, it is beneficial to meet the distance requirement between the mutual inductor winding 111 and the first lead-out end 211, and further beneficial to reduce the probability of short circuits between the mutual inductor winding 111 and the transformer winding 21 respectively caused by insulation failure.

[0059] In some specific embodiments of the present application, the safety distance is 6.3 millimeters, and the first distance between the mutual inductor winding 111 and the first lead-out end 211 is greater than or equal to 6.3 millimeters.

[0060] In some embodiments, referring to Figure 1 、 Figure 2 and Figure 3 the second fixing portion 122 includes a first pin 1221, and the first lead-out end 211 is electrically connected to the first pin 1221 so that the first lead-out end 211 can be connected to an external circuit through the first pin 1221, and the second distance between the mutual inductor winding 111 and the first pin 1221 is greater than or equal to the safety distance.

[0061] The second distance refers to the shortest distance between the mutual inductor winding 111 and the first pin 1221 without obstruction in space. For example, referring to Figure 7 , Figure 7 in which L2 represents the shortest distance between the mutual inductor winding 111 and the first pin 1221 on a plane to illustrate the approximate distance between the mutual inductor winding 111 and the first pin 1221, and the second distance is the expansion of L2 in space, and the second distance is greater than L2.

[0062] Thus, by making the second distance between the mutual inductor winding 111 and the first pin 1221 greater than or equal to the safety distance, it is beneficial to meet the distance requirement between the mutual inductor winding 111 and the first pin 1221, and further beneficial to reduce the probability of short circuits between the mutual inductor winding 111 and the transformer winding 21 respectively caused by insulation failure.

[0063] In some specific embodiments of the present application, the safety distance is 6.3 millimeters, and the first distance between the mutual inductor winding 111 and the first pin 1221 is greater than or equal to 6.3 millimeters.

[0064] In some embodiments, referring to Figure 1 、 Figure 2 and Figure 3, the current transformer 11 includes a transformer winding 111, and at least part of the surface of the transformer winding 111 is coated with an insulating member to increase the resistance between the transformer winding 111 and the outside, which is beneficial to reducing the probability of insulation failure between the transformer winding 111 and the outside; the transformer winding 111 includes a second lead-out end 1112, and the second lead-out end 1112 is not coated with an insulating member to facilitate connection with an external circuit; the transformer winding 21 includes a first lead-out end 211, and the transformer winding 21 is electrically connected to an external circuit through the first lead-out end 211; the third distance between the second lead-out end 1112 and the first lead-out end 211 is greater than or equal to the safety distance.

[0065] It should be noted that at least part of the surface of the transformer winding 111 being coated with an insulating member means that at least part of the surface of the second wire forming the transformer winding 111 is coated with an insulating member to reduce the risk of insulation failure of the second wire itself. The specific form of coating the insulating member is not limited. For example, insulating paint is coated on the surface of the second wire to form an insulating member; or, insulating plastic is coated on the surface of the second wire to form an insulating member.

[0066] The second lead-out end 1112 refers to one end of the transformer winding 111 that realizes electrical connection with an external component. It can be understood that the second lead-out end 1112 is not coated with an insulating member to be able to be electrically connected to an external component.

[0067] The third distance refers to the shortest unobstructed distance in space between the second lead-out end 1112 and the first lead-out end 211. For example, referring to Figure 6 , Figure 6 in which L3 represents the shortest distance between the transformer winding 111 and the first lead-out end 211 on a plane to indicate the approximate distance between the transformer winding 111 and the first lead-out end 211, and the third distance is the expansion of L3 in space, and the third distance is greater than L3.

[0068] In this way, by making the third distance between the first lead-out end 211 and the second lead-out end 1112 greater than or equal to the safety distance, it is beneficial to meet the distance requirement between the first lead-out end 211 and the second lead-out end 1112, and further beneficial to reducing the probability of short circuits of the transformer winding 111 and the transformer winding 21 caused by insulation failure.

[0069] In some specific embodiments of the present application, the safety distance is 6.3 millimeters, and the third distance between the second lead-out end 1112 and the first lead-out end 211 is greater than or equal to 6.3 millimeters.

[0070] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3, the current transformer winding 111 further includes a winding body 1111, the winding body 1111 is coated with an insulating member, the second fixing portion 122 includes a first lead pin 1221 and a second lead pin 1222, the first lead-out end 211 is electrically connected to the first lead pin 1221, so that the first lead-out end 211 is electrically connected to an external circuit through the first lead pin 1221; the distance between the winding body 1111 and the first lead pin 1221 is a fourth distance, the second lead-out end 1112 is electrically connected to the second lead pin 1222, so that the second lead-out end 1112 is electrically connected to an external circuit through the second lead pin 1222; the distance between the winding body 1111 and the second lead pin 1222 is a fifth distance, and the sum of the fourth distance and the fifth distance is greater than or equal to the safety distance.

[0071] It should be noted that the current transformer winding 111 is formed by a second wire, a part of the surface of the second wire is coated with an insulating member to form the winding body 1111, and the other part of the second wire is not coated with an insulating member to form the second lead-out end 1112.

[0072] The fourth distance refers to the shortest unobstructed distance in space between the winding body 1111 and the first lead pin 1221. For example, referring to Figure 8 , Figure 8 where L4 represents the shortest distance on a plane between the winding body 1111 and the first lead pin 1221 to indicate the approximate distance between the winding body 1111 and the first lead pin 1221, and the fourth distance is the expansion of L4 in space, and the fourth distance is greater than L4.

[0073] The fifth distance refers to the shortest unobstructed distance in space between the winding body 1111 and the second lead pin 1222. For example, referring to Figure 8 , Figure 8 where L4 represents the shortest distance on a plane between the winding body 1111 and the second lead pin 1222 to indicate the approximate distance between the winding body 1111 and the second lead pin 1222, and the fifth distance is the expansion of L5 in space, and the fifth distance is greater than L5.

[0074] In this way, by making the fourth distance and the fifth distance greater than or equal to the safety distance, it is beneficial to meet the distance requirements between the first lead-out end 211, the second lead-out end 1112 and the winding body 1111, and further beneficial to reducing the probability of short circuits between the current transformer winding 111 and the transformer winding 21 caused by insulation failure.

[0075] In some specific embodiments of the present application, the safety distance is 6.3 millimeters, and the sum of the fourth distance and the fifth distance is greater than or equal to 6.3 millimeters.

[0076] In some embodiments, referring to Figure 1 , Figure 2 , Figure 3 andFigure 4 The current transformer 11 includes a magnetic core 112, and the transformer winding 111 is wound around the magnetic core 112. The part of the transformer winding 21 disposed on the second fixing portion 122 passes through the magnetic core 112 to generate an electromagnetic field when energized, so that the transformer winding 111 detects the current in the transformer winding 21 by sensing the change of the electromagnetic field, and the magnetic core 112 can enhance the change of the electromagnetic field to facilitate the transformer winding 111 to perform induction. Specifically, the magnetic core 112 is arranged in a circular ring, which is beneficial for the part of the transformer winding 21 disposed on the second fixing portion 122 to pass through. It can be understood that in some other embodiments, the shape of the magnetic core 112 can be determined according to needs, as long as it is beneficial for the part of the transformer winding 21 disposed on the second fixing portion 122 to pass through, and it is not limited herein.

[0077] Correspondingly, the groove 122a is also a circular ring structure matching the magnetic core 112, so that the magnetic core 112 can be cooperatively arranged in the groove 122a, which is convenient for the assembly of the magnetic core 112 and the groove 122a.

[0078] In some embodiments, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,the second fixing portion 122 is provided with a through hole 122b, and the through hole 122b is arranged within the range surrounded by the side wall of the groove 122a. The part of the transformer winding 21 disposed on the second fixing portion 122 passes through the through hole 122b to facilitate passing through the magnetic core 112.

[0079] An embodiment of the present application provides a transformer 20, referring to Figure 5 ,including a transformer magnetic core 22, a transformer winding, and the transformer assembly 10 described in any one of the above.

[0080] In the transformer 20 provided by the embodiment of the present application, the current transformer 11 is integrated in the transformer assembly 10 by using the transformer assembly 10 described above. At the same time, by arranging the first fixing portion 121 and the second fixing portion 122 in the transformer assembly 10, at least part of the transformer winding 21 and the current transformer 11 can be respectively arranged; by arranging the groove 122a in the second fixing portion 122, at least part of the current transformer 11 can be accommodated, which is beneficial to reducing the probability of insulation failure, and is also beneficial to reducing the volume of the transformer assembly 10, and further beneficial to reducing the volume of the transformer 20.

[0081] An embodiment of the present application provides a power converter, and the power converter includes a circuit board and the transformer described above, and the transformer is electrically connected to the circuit board.

[0082] The power converter can be a micro-inverter, an energy storage converter, an optimizer, etc. Exemplarily, the DC terminal of the power converter can be connected to a DC source, and the AC terminal of the power converter can be connected to an AC source, so that the power converter can convert the input direct current into alternating current for output, or convert the input alternating current into direct current for output. For example, the power converter can be applied to the field of photovoltaic power generation technology. The direct current generated by the photovoltaic power generation technology is converted into alternating current through the power converter, and the alternating current will become available electric energy and be input into the power grid through a connector.

[0083] The power converter provided by the embodiment of the present application, by using the above-mentioned transformer 20, is beneficial to reducing the probability of insulation failure, and at the same time is also beneficial to reducing the volume of the transformer 20, and thus is beneficial to reducing the volume of the power converter.

[0084] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0085] The above-mentioned embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A transformer assembly, used for a transformer, characterized in that: The transformer assembly comprises: Current transformer; The fixing member includes a first fixing part and a second fixing part, wherein the first fixing part is connected to the second fixing part, the first fixing part is used to fix at least part of the transformer winding, and the second fixing part is provided with a groove, and the groove is used to accommodate at least part of the current transformer.

2. The transformer assembly according to claim 1, characterized in that: The second fixing portion has an assembly surface, and the groove is arranged on a surface of the second fixing portion opposite to the assembly surface.

3. The transformer assembly according to claim 1, characterized in that: The second fixing portion has an assembly surface, and the groove is arranged on the assembly surface of the second fixing portion.

4. The transformer assembly according to claim 2 or 3, characterized in that: The second fixing portion is configured on a circuit board, and the mounting surface is arranged toward the circuit board.

5. The transformer assembly according to claim 1, characterized in that: The current transformer includes a transformer winding, the transformer winding includes a first lead-out terminal, and a first distance between the transformer winding and the first lead-out terminal is greater than or equal to a safety distance.

6. The transformer assembly according to claim 5, characterized in that: The second fixing portion includes a first pin, the first lead-out end is electrically connected to the first pin, and a second distance between the transformer winding and the first pin is greater than or equal to the safety distance.

7. The transformer assembly according to claim 1, characterized in that: The current transformer includes a transformer winding, at least part of the surface of the transformer winding is covered with an insulating member, the transformer winding includes a second lead-out terminal, the transformer winding includes a first lead-out terminal, and a third distance between the second lead-out terminal and the first lead-out terminal is greater than or equal to a safety distance.

8. The transformer assembly according to claim 7, characterized in that: The transformer winding also includes a winding body, the surface of the winding body is covered with the insulating member, the second fixing portion includes a first pin and a second pin, the first lead-out end is electrically connected to the first pin, the distance between the winding body and the first pin is a fourth distance, the second lead-out end is electrically connected to the second pin, the distance between the winding body and the second pin is a fifth distance, and the sum of the fourth distance and the fifth distance is greater than or equal to the safety distance.

9. The transformer assembly according to claim 1, characterized in that: The current transformer comprises a magnetic core, and the shape of the magnetic core is a ring.

10. The transformer assembly according to claim 9, characterized in that The groove is a circular ring structure, and the magnetic core can be cooperatively arranged in the groove.

11. A transformer, characterized in that: The invention comprises a transformer core, a transformer winding and the transformer assembly according to any one of claims 1 to 10.

12. A power converter, characterized in that: The power converter comprises a circuit board and the transformer according to claim 11, wherein the transformer is electrically connected to the circuit board.

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