CN220984321U - Transformer assembly and electrical equipment - Google Patents

Abstract

The application provides a transformer assembly and an electrical device, the transformer assembly comprising: the transformer comprises a transformer body, a current sensor body and transformer leads, wherein the transformer body comprises a first magnetic core, a first coil and a second coil, and the first coil is mutually transformed with the second coil through the first magnetic core; the current sensor body comprises a second magnetic core and a third coil, the second magnetic core is spaced from the first magnetic core, the first coil and the second coil, and the third coil is spaced from the first magnetic core, the first coil and the second coil; one end of the transformer lead is electrically connected with the first coil or the second coil, and the other end of the transformer lead is mutually inductance with the third coil through the second magnetic core. The transformer assembly and the electrical equipment provided by the application can simplify circuit design and are beneficial to miniaturization.

Description

Transformer assembly and electrical equipment

Technical Field

The application relates to the technical field of electric technology, in particular to a transformer assembly and electric equipment.

Background

In the related art, current detection of a transformer is achieved by connecting a current sensor in series in a loop of the transformer. The current sensor occupies a large space in a loop of the transformer, and the current sensor needs to be electrically connected with a corresponding input circuit and an output circuit, so that the circuit design is complex.

Disclosure of utility model

The application provides a transformer assembly and an electrical device which can simplify circuit design and are beneficial to miniaturization.

In one aspect, the present application provides a transformer assembly comprising:

The transformer comprises a transformer body, a first magnetic core, a first coil and a second coil, wherein the first coil is mutually transformed with the second coil through the first magnetic core;

A current sensor body including a second magnetic core spaced from the first magnetic core, the first coil, and the second coil, and a third coil spaced from the first magnetic core, the first coil, and the second coil; and

And one end of the transformer lead is electrically connected with the first coil or the second coil, and the other end of the transformer lead is mutually inductance with the third coil through the second magnetic core.

In one possible embodiment, the second magnetic core is annular, the third coil is wound on the second magnetic core, and the other end of the transformer lead penetrates through the second magnetic core.

In one possible embodiment, the transformer body further comprises a base, and the first magnetic core, the first coil, the second magnetic core, and the third coil are carried on the same side of the base.

In one possible embodiment, the base includes a bottom plate and a plurality of first protruding portions arranged on the bottom plate at intervals, the first magnetic core is disposed on the bottom plate, a first accommodating space is defined between the first magnetic core and the plurality of first protruding portions, and the first coil and the second coil are accommodated in the first accommodating space.

In one possible embodiment, the base further includes a second protruding portion disposed on the bottom plate, the second protruding portion encloses a second accommodating space, and the second magnetic core and the third coil are accommodated in the second accommodating space.

In a possible embodiment, the base further includes a third protruding portion disposed on the bottom plate, the third protruding portion is located in the second accommodating space, and the second magnetic core and the third coil are abutted between the second protruding portion and the third protruding portion.

In one possible embodiment, the third protruding portion encloses a third accommodating space, and the other end of the transformer lead is accommodated in the third accommodating space and passes through the bottom plate.

In one possible embodiment, the first magnetic core includes a first sub-magnetic core and a second sub-magnetic core that are butted against each other, and the first coil and the second coil are located between the first sub-magnetic core and the second sub-magnetic core.

In one possible embodiment, the first coil includes a first sub-coil and a second sub-coil, a sub-accommodating space is formed between the first sub-coil and the second sub-coil, and the second coil is located in the sub-accommodating space.

In another aspect, the application provides an electrical device, including a detection circuit, a control circuit and the transformer assembly, where the detection circuit is electrically connected to the third coil, and the detection circuit is electrically connected to the control circuit, and the detection circuit is configured to detect a current value of the third coil and transmit the current value of the third coil to the control circuit, and the control circuit is configured to control an input current of the transformer assembly according to the current value of the third coil.

The transformer component comprises a transformer main body, a current sensor main body and a transformer lead, wherein the transformer main body comprises a first magnetic core, a first coil and a second coil, the current sensor main body comprises a second magnetic core and a third coil, one end of the transformer lead is electrically connected with the first coil or the second coil, the other end of the transformer lead is mutually transformed with the third coil through the second magnetic core, therefore, the other end of the transformer lead can be reused as a primary side of the current sensor, and current detection is realized through the current sensor formed by the other end of the transformer lead, the second magnetic core and the third coil, so that the volume of the transformer component is reduced, and the circuit design of the transformer component is simplified.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described.

Fig. 1 is a schematic structural diagram of a transformer assembly according to an embodiment of the present application;

FIG. 2 is an exploded view of a transformer body, a current sensor body, and transformer leads of the transformer assembly of FIG. 1;

FIG. 3 is a schematic view of the transformer assembly of FIG. 2 with the current sensor body separated from the base;

FIG. 4 is a schematic view of a base of the transformer assembly of FIG. 3 including a bottom plate, a first protrusion, a second protrusion, and a third protrusion;

FIG. 5 is an enlarged schematic view of region A of the transformer assembly of FIG. 1;

FIG. 6 is a schematic diagram of a first magnetic core of the transformer assembly of FIG. 1 including a first sub-magnetic core, a second sub-magnetic core, and a third sub-magnetic core;

Fig. 7 is a schematic diagram of circuit connection of an electrical device according to an embodiment of the present application.

Reference numerals:

A transformer assembly 100; a transformer body 10; a current sensor body 20; a transformer lead 30; a first magnetic core 101; a first coil 102; a second coil 103; a base 104; a bottom plate 140; the first protrusion 141; the first accommodation space 1410; a second projection 142; a second accommodation space 1420; a third projection 143; a third receiving space 1430; a first sub-core 110; a second sub-core 111; a first sub-coil 120; a second sub-coil 121; a third sub-core 112; a third sub-coil 122; a detection circuit 21; a control circuit 22; an input circuit 23.

Detailed Description

The technical scheme provided by the application is clearly and completely described below with reference to the accompanying drawings. It should be apparent that the described embodiments of the application are only some embodiments, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments described herein, fall within the scope of the application.

Reference in the specification to "an embodiment," "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will appreciate explicitly and implicitly that the described embodiments of the application may be combined with other embodiments.

The terms first, second and the like in the description and in the claims of the application and in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order; the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion.

Fig. 1 is a schematic diagram of a transformer assembly 100 according to an embodiment of the application. The transformer assembly 100 includes a transformer body 10, a current sensor body 20, and transformer leads 30.

Referring to fig. 1 and 2, the transformer body 10 includes a first magnetic core 101, a first coil 102 and a second coil 103. The material and shape of the first magnetic core 101 are not particularly limited in the present application. For example: the first magnetic core 101 may be a magnetic conductor made of ferrite, soft magnetic alloy, or a magnetic conductor made of pure iron, silicon steel, nickel-iron alloy, or the like. The shape of the first magnetic core 101 may be one of a sheet, a column, a C-shape, a U-shape, an E-shape, a ring shape, and the like. The first coil 102 includes a first wire. The material and winding method of the first coil 102 are not particularly limited in the present application. For example: the material of the first coil 102 may be metal, alloy, or the like. The first coil 102 may be a single-layer wound coil, or may be a multi-layer wound coil, or may be a cross-wound coil, or the like. Of course, the first coil 102 may further include an enamel wire wound outside the first wire. The second coil 103 includes a second wire. The material and winding method of the second coil 103 are not particularly limited in the present application. For example: the material of the second coil 103 may be metal, alloy, or the like. The second coil 103 may be a single-layer wound coil, or may be a multi-layer wound coil, or may be a cross-wound coil, or the like. Of course, the second coil 103 may further include an enamel wire wound outside the second wire.

The first coil 102 is mutually inductive with the second coil 103 through the first magnetic core 101. In other words, the first coil 102 is electromagnetically coupled to the second coil 103 through the first magnetic core 101. It will be appreciated that when one of the first coil 102 or the second coil 103 is energized, an alternating magnetic flux is generated in the first magnetic core 101, and the first coil 102 and the second coil 103 induce electric potentials under the alternating magnetic flux, respectively, thereby enabling voltage regulation.

The current sensor body 20 includes a second magnetic core 201 and a third coil 202. The material and shape of the second magnetic core 201 are not particularly limited in the present application. For example: the second magnetic core 201 may be a magnetic conductor made of ferrite, soft magnetic alloy, or may be a magnetic conductor made of pure iron, silicon steel, nickel-iron alloy, or the like. The shape of the second magnetic core 201 may be one of a sheet, a column, a C-shape, a U-shape, an E-shape, a ring shape, and the like. The third coil 202 includes a third wire. The material and winding method of the third coil 202 are not particularly limited in the present application. For example: the material of the third coil 202 may be metal, alloy, or the like. The third coil 202 may be a single-layer wound coil, or may be a multi-layer wound coil, or may be a cross-wound coil, or the like. Of course, the third coil 202 may further include an enamel wire wound outside the third wire.

The second magnetic core 201 is spaced apart from the first magnetic core 101, the first coil 102, and the second coil 103. The third coil 202 is spaced from the first magnetic core 101, the first coil 102, and the second coil 103. In other words, the current sensor body 20 is located outside the transformer body 10. By locating the current sensor body 20 outside the transformer body 10, the mutual interference between the internal electromagnetic field of the transformer body 10 and the internal electromagnetic field of the current sensor body 20 can be reduced.

The transformer lead 30 refers to a wire electrically connecting an internal coil of the transformer and an external circuit. The number of transformer leads 30 may be plural. In one possible embodiment, the number of transformer leads 30 may be two, described in the following examples as a first transformer lead 30 and a second transformer lead, respectively. The first transformer lead 30 is electrically connected between the first coil 102 and an external circuit, and the second transformer lead is electrically connected between the second coil 103 and an external circuit.

One end of the transformer lead 30 is electrically connected to the first coil 102 or the second coil 103, and the other end of the transformer lead 30 is mutually inductance-connected to the third coil 202 through the second magnetic core 201. In one possible embodiment, one end of the first transformer lead 30 is electrically connected to the first coil 102, and the other end of the first transformer lead 30 is mutually-inductive with the third coil 202 through the second magnetic core 201. In another possible embodiment, one end of the second transformer lead is electrically connected to the second coil 103, and the other end of the second transformer lead is mutually-inductance with the third coil 202 through the second magnetic core 201. It will be appreciated that one of the first and second transformer leads 30, 202 is mutually-inductive with the third coil 201 through the second magnetic core 201. In other words, one of the first and second transformer leads 30 and 202 is electromagnetically coupled to the third coil through the second magnetic core 201. Of course, in other possible embodiments, the transformer assembly 100 may include a plurality of current sensor bodies 20. For example: the transformer assembly 100 may include two current sensor bodies 20. A current sensor body 20 includes a second magnetic core 201 and a third coil 202. The other current sensor body 20 includes another second magnetic core 201 and another third coil 202. One end of the first transformer lead 30 may be electrically connected to the first coil 102, and the other end of the first transformer lead 30 may be mutually-induced with the third coil 202 through the second magnetic core 201 in one current sensor body 20. One end of the second transformer lead may be electrically connected to the second coil 103, and the other end of the second transformer lead may be mutually-inductive with the third coil 202 through the second magnetic core 201 in the other current sensor body 20.

In the following embodiments, one end of the first transformer lead 30 is electrically connected to the first coil 102, and the other end of the first transformer lead 30 is mutually transformed with the third coil 202 by the second magnetic core 201, which will not be described in detail later. It will be appreciated that the other end of the first transformer lead 30 is electromagnetically coupled to the third coil 202 through the second magnetic core 201. The first transformer lead 30 current value may be determined by detecting the current value in the third coil 202 and based on the number of turns N of the third coil 202 and the number M of first wires in the first transformer lead 30. Specifically, the ratio of the current flowing through the first transformer lead 30 to the current flowing through the third coil 202 is M: n. In one possible embodiment, the number M of the first wires in the first transformer lead 30 may be 1, i.e. the ratio of the current flowing through the first transformer lead 30 to the current flowing through the third coil 202 is 1: n.

The transformer assembly 100 provided by the application comprises a transformer main body 10, a current sensor main body 20 and a transformer lead 30, wherein the transformer main body 10 comprises a first magnetic core 101, a first coil 102 and a second coil 103, the current sensor main body 20 comprises a second magnetic core 201 and a third coil 202, one end of the transformer lead 30 is electrically connected with the first coil 102 or the second coil 103, the other end of the transformer lead 30 is mutually transformed with the third coil 202 through the second magnetic core 201, the other end of the transformer lead 30 can be reused as a primary side of the current sensor, and current detection is realized through the current sensor formed by the other end of the transformer lead 30, the second magnetic core 201 and the third coil 202, so that the volume of the transformer assembly 100 is reduced, and the circuit design of the transformer assembly 100 is simplified.

In one possible embodiment, as shown in fig. 2, the second magnetic core 201 is annular. In the embodiment of the present application, the second magnetic core 201 is in a circular shape. Of course, in other possible embodiments, the second magnetic core 201 may also be a square ring, a rectangular ring, or the like. The third coil 202 is wound around the second core 201, and the other end of the transformer lead 30 penetrates the second core 201. It will be appreciated that the second core 201 forms a magnetic loop inductance with the third coil 202. The other end of the first transformer lead 30 is inserted into the magnetic loop inductor formed by the second magnetic core 201 and the third coil 202. Specifically, the other end of the first transformer lead 30 penetrates through one side of the second magnetic core 201 and penetrates out through the other side of the second magnetic core 201. The third coil 202 surrounds the outer circumference of the other end of the first transformer lead 30 and is spaced apart from the other end of the first transformer lead 30, and the second core 201 surrounds the outer circumference of the other end of the first transformer lead 30 and is spaced apart from the other end of the first transformer lead 30. The third coil 202 is wound on the second core 201 by N turns. N is an integer.

In this embodiment, the second magnetic core 201 is formed in a ring shape, the third coil 202 is wound on the second magnetic core 201, and the other end of the transformer lead 30 penetrates through the second magnetic core 201, so that the volume of the current sensor formed by the other end of the transformer lead 30, the second magnetic core 201 and the third coil 202 can be reduced while the mutual inductance between the other end of the transformer lead 30 and the third coil 202 is realized through the second magnetic core 201, and the structural compactness of the transformer assembly 100 is improved.

Of course, in other possible embodiments, the second magnetic core 201 may be annular, and the third coil 202 and the other end of the first transformer lead 30 may be respectively wound on the second magnetic core 201, so as to realize that the other end of the transformer lead 30 is mutually transformed with the third coil 202 through the second magnetic core 201.

Referring to fig. 2 and 3, the transformer body 10 further includes a base 104. The base 104 may be a plate-shaped base, a frame base, a three-dimensional base, or the like. The first magnetic core 101, the first coil 102, the second coil 103, the second magnetic core 201, and the third coil 202 are carried on the same side of the base 104. By having the base 104 of the transformer body 10 carry the second and third magnetic cores 201, 202 of the current sensor body 20, the components of the transformer assembly 100 can be reduced; the first magnetic core 101, the first coil 102, the second coil 103, the second magnetic core 201 and the third coil 202 are carried on the same side of the base 104, so that the volume of the transformer assembly 100 can be reduced while the current detection of the internal coil of the transformer body 10 can be realized, and the transformer assembly 100 can be miniaturized.

In one possible embodiment, as shown in fig. 4, the base 104 includes a bottom plate 140 and a plurality of first protrusions 141 spaced apart on the bottom plate 140. The shape of the bottom plate 140 is not particularly limited in the present application. For example: the bottom plate 140 may be generally L-shaped. The number and shape of the first protrusions 141 are not particularly limited in the present application. For example: the number of the first protrusions 141 may be three, four, six, etc. The shape of the first protrusion 141 may be a cylinder, a square cylinder, etc. The first protrusions 141 may be disposed at a plurality of corner positions of the bottom plate 140, respectively. The first magnetic core 101 is disposed on the bottom plate 140. Specifically, at least a portion of the first magnetic core 101 is disposed on a side of the plurality of first protruding portions 141 facing away from the bottom plate 140. The first magnetic core 101 and the first protruding portion 141 may be fixedly connected together or may be engaged with each other. A first accommodating space 1410 is defined between the first magnetic core 101 and the plurality of first protruding portions 141. The first coil 102 and the second coil 103 are accommodated in the first accommodation space 1410.

In this embodiment, the first coil 102 and the second coil 103 are accommodated in the first accommodating space 1410 formed by surrounding between the first magnetic core 101 and the plurality of first protruding portions 141, and the first protruding portions 141 are disposed so as to facilitate fixing the first magnetic core 101, increase the size of the first accommodating space 1410, and facilitate the first coil 102 and the second coil 103 to be longitudinally accommodated in the first accommodating space 1410, thereby reducing the transverse dimension of the transformer assembly 100.

Further, referring to fig. 4 and 5, the base 104 further includes a second protruding portion 142 disposed on the bottom plate 140. The shape of the second projection 142 is not particularly limited in the present application. For example: the second protruding portion 142 may have a substantially circular shape. The second protruding portion 142 encloses a second accommodating space 1420. The second core 201 and the third coil 202 are accommodated in the second accommodating space 1420.

In this embodiment, the base 104 further includes the second protruding portion 142 disposed on the bottom plate 140, and the second magnetic core 201 and the third coil 202 are accommodated in the second accommodating space 1420 formed by surrounding the second protruding portion 142, so that the installation of the current sensor main body 20 is simple and convenient, and the second protruding portion 142 can limit the shake of the second magnetic core 201 and the third coil 202, so as to improve the reliability of the mutual inductance of the other end of the transformer lead 30 and the third coil 202 through the second magnetic core 201.

Further, referring to fig. 4 and 5, the base 104 further includes a third protruding portion 143. The shape of the third protruding portion 143 is not particularly limited in the present application. For example: the third protruding portion 143 may have a substantially circular shape. The third protruding portion 143 is disposed in the second accommodating space 1420. It will be appreciated that the radial dimension of the third projection 143 is smaller than the radial dimension of the second projection 142. The second magnetic core 201 and the third coil 202 are abutted between the second projection 142 and the third projection 143.

In this embodiment, the base 104 further includes the third protruding portion 143 disposed on the bottom plate 140, the third protruding portion 143 is disposed in the second accommodating space 1420, and the second magnetic core 201 and the third coil 202 are abutted between the second protruding portion 142 and the third protruding portion 143, so that the third protruding portion 143 can further limit the shake of the second magnetic core 201 and the third coil 202, and the reliability of mutual inductance of the other end of the transformer lead 30 and the third coil 202 through the second magnetic core 201 is improved.

Further, referring to fig. 4 and 5, the third protruding portion 143 encloses a third accommodating space 1430. The other end of the transformer lead 30 is received in the third receiving space 1430 and passes through the bottom plate 140. The other end of the transformer lead 30 passes through the bottom plate 140 and is electrically connected to an external circuit.

In this embodiment, the third protruding portion 143 surrounds the third accommodating space 1430, and the other end of the transformer lead 30 is accommodated in the third accommodating space 1430, so that the third protruding portion 143 can limit the wobble of the other end of the transformer lead 30, and the reliability of mutual inductance between the other end of the transformer lead 30 and the third coil 202 through the second magnetic core 201 is improved.

Alternatively, as shown in fig. 6, the first magnetic core 101 includes a first sub-magnetic core 110 and a second sub-magnetic core 111 that are butted against each other. The first sub-core 110 may be a magnetic conductor made of ferrite, soft magnetic alloy, or a magnetic conductor made of pure iron, silicon steel, nickel-iron alloy, or the like. The shape of the first sub-core 110 may be one of a sheet, a column, a C-shape, a U-shape, an E-shape, a ring shape, etc. In the embodiment of the present application, the first sub-core 110 having an approximately E shape is taken as an example. The second sub-core 111 may be a magnetic conductor made of ferrite, soft magnetic alloy, or a magnetic conductor made of pure iron, silicon steel, nickel-iron alloy, or the like. The shape of the second sub-core 111 may be one of a sheet, a column, a C-shape, a U-shape, an E-shape, a ring shape, and the like. In the embodiment of the present application, the second sub-core 111 having an approximately E shape is taken as an example. The first coil 102 and the second coil 103 are located between the first sub-core 110 and the second sub-core 111.

By making the first magnetic core 101 include the first sub-magnetic core 110 and the second sub-magnetic core 111 that are mutually abutted, it is beneficial to realize that the first coil 102 and the second coil 103 are accommodated in the first accommodating space 1410 formed by surrounding between the first magnetic core 101 and the plurality of first protruding parts 141, and the first coil 102 and the second coil 103 are both positioned between the first sub-magnetic core 110 and the second sub-magnetic core 111, the coupling between the first coil 102 and the second coil 103 and the first magnetic core 101 can be increased, so that the performance of mutual inductance between the first coil 102 and the second coil 103 through the first magnetic core 101 can be improved.

Alternatively, as shown in fig. 6, the first coil 102 includes a first sub-coil 120 and a second sub-coil 121. A sub-accommodating space is formed between the first sub-coil 120 and the second sub-coil 121, and the second coil 103 is located in the sub-accommodating space. It will be appreciated that the first sub-core 110, the first sub-coil 120, the second coil 103, the second sub-coil 121, and the second sub-core 111 are arranged in this order. In one possible embodiment, the first sub-coil 120 may have a planar ring shape. The second sub-coil 121 may have a planar ring shape.

In one possible embodiment, the first magnetic core 101 may further include a third sub-magnetic core 112 located between the first sub-magnetic core 110 and the second sub-magnetic core 111. The first sub-core 110, the third sub-core 112, and the second sub-core 111 are sequentially butted together. In the embodiment of the present application, the third sub-core 112 having an approximately E-shape is taken as an example. It is understood that the first sub-core 110, the third sub-core 112, and the second sub-core 111 are sequentially arranged. Wherein, the first sub-coil 120, the second coil 103 and the second sub-coil 121 may be all located between the first sub-core 110 and the third sub-core 112, or the first sub-coil 120, the second coil 103 and the second sub-coil 121 may be all located between the third sub-core 112 and the second sub-core 111; or the first sub-coil 120 and the second coil 103 may be located between the first sub-core 110 and the third sub-core 112, and the second sub-coil 121 may be located between the third sub-core 112 and the second sub-core 111; still alternatively, the first coil 102 may further include at least one third sub-coil 122, and the first sub-coil 120, the second coil 103, and the second sub-coil 121 may be all located between the first sub-core 110 and the third sub-core 112, and the at least one third sub-coil 122 may be located between the third sub-core 112 and the second sub-core 111. Of course, in other possible embodiments, the second coil 103 may also include a fourth sub-coil and a fifth sub-coil. The first sub-coil 120, the fourth sub-coil, the second sub-coil 121, and the fifth sub-coil may be sequentially arranged.

By making the first coil 102 include the first sub-coil 120 and the second sub-coil 121, a sub-accommodating space is formed between the first sub-coil 120 and the second sub-coil 121, and the second coil 103 is located in the sub-accommodating space, the distance between the second coil 103 and the first coil 102 can be reduced, and the mutual inductance performance between the second coil 103 and the first coil 102 can be improved.

In addition, as shown in fig. 7, the present application also provides an electrical apparatus 200. The electrical device 200 includes the detection circuit 21, the control circuit 22, and the transformer assembly 100 described in any of the embodiments above. The detection circuit 21 is electrically connected to the third coil 202, and the detection circuit 21 is electrically connected to the control circuit 22. The detection circuit 21 and the third coil 202 may be directly or indirectly electrically connected. The detection circuit 21 and the control circuit 22 may be directly or indirectly electrically connected. The detection circuit 21 is configured to detect a current value of the third coil 202 and transmit the current value of the third coil 202 to the control circuit 22.

The control circuit 22 is used for controlling the input current of the transformer assembly 100 according to the current value of the third coil 202. Specifically, the electrical device 200 may further include an input circuit 23. The input circuit 23 is electrically connected to one end of the first transformer lead 30 of the transformer assembly 100, or the input circuit 23 is electrically connected to one end of the second transformer lead of the transformer assembly 100. The input circuit 23 is also electrically connected to the control circuit 22. When the input circuit 23 is electrically connected to one end of the first transformer lead 30 of the transformer assembly 100, the input circuit 23 may regulate the input circuit 23 of the first coil 102 under the control of the control circuit 22; when the input circuit 23 is electrically connected to one end of the second transformer lead of the transformer assembly 100, the input circuit 23 may regulate the input current of the second coil 103 under the control of the control circuit 22, thereby achieving power control and overcurrent protection of the transformer assembly 100.

The features mentioned in the description, the claims and the drawings may be combined with one another at will as far as they are relevant within the scope of the application. The advantages and features described for the transformer assembly 100 apply in a corresponding manner to the electrical device 200.

While embodiments of the present application have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and alternatives to the above embodiments may be made by those skilled in the art within the scope of the application, which is also to be regarded as being within the scope of the application.

Claims (10)

1. A transformer assembly, comprising:

The transformer comprises a transformer body, a first magnetic core, a first coil and a second coil, wherein the first coil is mutually transformed with the second coil through the first magnetic core;

A current sensor body including a second magnetic core spaced from the first magnetic core, the first coil, and the second coil, and a third coil spaced from the first magnetic core, the first coil, and the second coil; and

And one end of the transformer lead is electrically connected with the first coil or the second coil, and the other end of the transformer lead is mutually inductance with the third coil through the second magnetic core.

2. The transformer assembly of claim 1, wherein the second magnetic core is annular, the third coil is wound on the second magnetic core, and the other end of the transformer lead penetrates the second magnetic core.

3. The transformer assembly of claim 2, wherein the transformer body further comprises a base, the first magnetic core, the first coil, the second magnetic core, and the third coil being carried on a same side of the base.

4. The transformer assembly of claim 3, wherein the base comprises a bottom plate and a plurality of first protruding portions arranged on the bottom plate at intervals, the first magnetic core is arranged on the bottom plate, a first accommodating space is formed between the first magnetic core and the plurality of first protruding portions in a surrounding mode, and the first coil and the second coil are accommodated in the first accommodating space.

5. The transformer assembly of claim 4, wherein the base further comprises a second protrusion disposed on the base plate, the second protrusion enclosing to form a second receiving space, the second magnetic core and the third coil being received in the second receiving space.

6. The transformer assembly of claim 5, wherein the base further comprises a third protrusion disposed on the bottom plate, the third protrusion being located in the second receiving space, the second magnetic core and the third coil abutting between the second protrusion and the third protrusion.

7. The transformer assembly of claim 6, wherein the third protruding portion encloses a third accommodating space, and the other end of the transformer lead is accommodated in the third accommodating space and passes out through the bottom plate.

8. The transformer assembly of claim 4, wherein the first magnetic core comprises a first sub-magnetic core and a second sub-magnetic core that are butted against each other, the first coil, the second coil being located between the first sub-magnetic core and the second sub-magnetic core.

9. The transformer assembly of claim 4, wherein the first coil comprises a first sub-coil and a second sub-coil, a sub-housing space is formed between the first sub-coil and the second sub-coil, and the second coil is positioned in the sub-housing space.

10. An electrical device comprising a detection circuit, a control circuit and the transformer assembly of any one of claims 1 to 9, the detection circuit being electrically connected to the third coil and the detection circuit being electrically connected to the control circuit, the detection circuit being configured to detect a current value of the third coil and to transmit the current value of the third coil to the control circuit, the control circuit being configured to control an input current of the transformer assembly in accordance with the current value of the third coil.