CN115240966A - Mutual inductor assembly and circuit breaker - Google Patents

Abstract

The application discloses mutual inductor subassembly and circuit breaker relates to the switch electrical technology field. The mutual inductor assembly comprises a shell, wherein an induction coil is arranged in the shell and used for being arranged corresponding to a circuit loop of a circuit breaker to induce current of the circuit loop, a first circuit board and a second circuit board which are electrically connected are respectively arranged on two opposite sides of the shell, and the induction coil is electrically connected with the first circuit board or the second circuit board. The heat source can be dispersed, and the stability in use is improved.

Description

Mutual inductor assembly and circuit breaker

Technical Field

The application relates to the technical field of switch electricity, in particular to a mutual inductor assembly and a circuit breaker.

Background

The breaker is a current switch device used for distributing electric energy and protecting power supply lines, motors and the like in real time, and can bear, close and open current in a normal loop in due time according to the states of the circuit, such as normal, overload, short circuit, undervoltage and the like, so that the safe production is ensured.

In the existing circuit breaker, all electrical components such as contacts, arc-extinguishing chambers, transformers, trip units and circuit boards are hermetically installed in a housing. In the limited space of the circuit breaker, a small portion is left for mounting the circuit board. However, the circuit board is a heating element, and is limited by the limited space of the circuit breaker, the heat emitted by the circuit board cannot be dissipated timely, and the heat generated by the work of other elements further accelerates the temperature rise of the circuit board, so that the heat source is concentrated, the instability of the work of components on the circuit board is easily caused, and the stability of the whole circuit breaker in use is influenced.

Disclosure of Invention

An object of this application is to provide a mutual-inductor subassembly and circuit breaker, can disperse the heat source, stability when promoting the use.

The embodiment of the application is realized as follows:

an aspect of the embodiment of the application provides a mutual inductor subassembly, which comprises a housin, be provided with induction coil in the casing, induction coil is used for corresponding the setting with the circuit return circuit of circuit breaker, in order to respond to the electric current in circuit return circuit, wherein, the relative both sides of casing are provided with the first circuit board and the second circuit board of electricity connection respectively, induction coil with first circuit board or the second circuit board electricity is connected.

Optionally, the housing includes a plurality of cavities, each cavity is provided with a limiting column, and the induction coil is located in the cavity and sleeved on the limiting column.

Optionally, a partition plate is arranged between the adjacent chambers, a through groove penetrating through the partition plate is arranged in the partition plate, the extending direction of the through groove faces the first circuit board and the second circuit board, and the first circuit board and the second circuit board are connected through a connecting piece penetrating through the through groove.

Optionally, the connector comprises a pin or a circuit board.

Optionally, the housing is provided with a first groove and a second groove, respectively, wherein the first circuit board is disposed in the first groove, and the second circuit board is disposed in the second groove.

Optionally, a connection terminal is arranged on the first circuit board, and the connection terminal is used for being electrically connected with a controller of the circuit breaker.

Optionally, a current detection circuit is disposed on the first circuit board, and a current conversion circuit is disposed on the second circuit board.

In another aspect of the embodiments of the present application, there is provided a circuit breaker, including the transformer assembly as described in any one of the above, the transformer assembly being located inside a housing of the circuit breaker.

Optionally, the circuit breaker further includes a third circuit board, a temperature sensor is disposed on the third circuit board, a support and a fixed contact disposed on the support are further disposed in the housing, the support includes a hollow column abutting against a contact of the fixed contact, and the temperature sensor is disposed in the hollow column to detect a temperature at the contact.

Optionally, the third circuit board is further provided with a connection terminal, the connection terminal is connected with the first circuit board or the second circuit board of the transformer assembly, the bracket is further provided with a transformer, and the transformer is connected with the third circuit board and used for sensing the current of the static contact.

The beneficial effects of the embodiment of the application include:

the mutual inductor subassembly and circuit breaker that this application embodiment provided through the casing to and set up the induction coil in the casing, can play the effect of protection to induction coil, be favorable to guaranteeing induction coil job stabilization nature, reduce the influence that receives external environment. The induction coil corresponds the setting with the circuit return circuit of circuit breaker to the electric current in induction circuit return circuit is favorable to promoting the intellectuality of circuit breaker. In the process of setting the mutual inductor, because the circuit loop and the mutual inductor assembly are mutually independent, the modular setting and flexible installation and fixation of the mutual inductor assembly are facilitated, and the setting form is facilitated to be simplified. In addition, set up first circuit board and second circuit board through the relative both sides at the casing for the components and parts that constitute the mutual-inductor subassembly are comparatively dispersed, avoid components and parts on first circuit board and the second circuit board to concentrate together and lead to generating heat comparatively concentrated problem, so, can disperse the heat source, stability and security when promoting the use.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

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

fig. 2 is a schematic structural diagram of connection between a first circuit board and a second circuit board according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a housing according to an embodiment of the present disclosure;

fig. 4 is a second schematic structural diagram of the housing according to the embodiment of the present application;

fig. 5 is a schematic structural diagram of a bracket and a stationary contact in cooperation according to an embodiment of the present application.

An icon: 100-a transformer assembly; 110-a housing; 112-a chamber; 114-a spacing post; 116-a separator; 117-first groove; 118-a second groove; 1162-a through slot; 120-an induction coil; 130-a first circuit board; 132-a terminal; 140-a second circuit board; 150-a connector; 160-a support; 162-hollow upright post; 170-static contact; 172-contact; 180-a third circuit board; 182-a temperature sensor; 184-a connection terminal; 190-mutual inductor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

With the intelligent development of switches in photovoltaic power generation, wind power generation, data centers, charging facilities and rail transit, the intelligent requirements on the switches are more and more. Wherein, realize that one of the intelligent important modes of switch is to set up various sensors, like temperature sensor, shunt etc to gather the operating condition of switch in real time, be convenient for operating personnel long-range operating condition of looking over, so that in time make corresponding operation.

And to switch electrical apparatus such as circuit breaker, survey switch, be subject to inside spatial structure for when setting up too much components and parts, make the heat source comparatively concentrate, the dissipation that the heat can not be timely, thereby cause the unstability of components and parts work on the circuit board easily, influence the stability when switch electrical apparatus such as whole circuit breaker uses. In this regard, the embodiments of the present application propose the following solutions.

Referring to fig. 1 and 2, the present embodiment provides a transformer assembly 100, including a housing 110, an induction coil 120 is disposed in the housing 110, the induction coil 120 is disposed corresponding to a circuit loop of a circuit breaker to induce a current of the circuit loop, wherein a first circuit board 130 and a second circuit board 140 electrically connected to each other are respectively disposed on two opposite sides of the housing 110, and the induction coil 120 is electrically connected to the first circuit board 130 or the second circuit board 140.

Specifically, the circuit loop includes a moving contact, a fixed contact 170, and a conductor connected to the moving contact or the fixed contact 170 to form the circuit loop, and the mutual inductor assembly 100 can reasonably arrange the positions according to the spatial distribution state in the circuit breaker, as long as it can detect the current of the circuit loop.

The mutual inductor assembly 100 is manufactured by utilizing the characteristic that the primary side current and the secondary side current of the transformer are in proportion, and non-contact measurement is realized while the purpose of measurement is achieved, so that a circuit loop and a measuring circuit are well isolated, and the mutual inductor assembly has extremely important significance for normal work of equipment to be measured, such as protection, measurement, monitoring and the like of a circuit breaker. Compare at circuit return circuit with direct series connection, guaranteed measuring circuit's security to make circuit return circuit and measuring circuit relatively independent, be favorable to making mutual-inductor subassembly 100 form independent modular structure, with circuit return circuit adaptation installation, be favorable to simplifying the setting form, and promote the installation effectiveness.

It should be noted that, in the embodiment of the present application, the number of the induction coils 120 is not specifically limited, and for example, one, two, or three induction coils 120 may be provided according to an actual circuit loop condition as long as a required measurement requirement can be met. In addition, the first circuit board 130 and the second circuit board 140 are respectively arranged on the two opposite sides of the shell 110, so that heating elements forming the mutual inductor assembly 100 can be relatively dispersed, heat dissipation is facilitated, the induction coil 120 is electrically connected with the first circuit board 130 or the second circuit board 140, the induction coil 120 is electrically connected with an analysis processing module electrically formed by the first circuit board 130 and the second circuit board 140, and more accurate measurement values are obtained through analysis processing of the induction coil 120, so that the measurement accuracy is improved.

The mutual inductor subassembly 100 that this application embodiment provided, through casing 110 to and the induction coil 120 of setting in casing 110, can play the effect of protection to induction coil 120, be favorable to guaranteeing the stability of induction coil 120 work, reduce the influence that receives external environment. The induction coil 120 is arranged corresponding to the circuit loop of the circuit breaker to induce the current of the circuit loop, which is beneficial to improving the intelligence of the circuit breaker. In the process of setting the mutual inductor, because the circuit loop and the mutual inductor assembly 100 are mutually independent, the modular setting and flexible installation and fixation of the mutual inductor assembly 100 are facilitated, and the setting form is facilitated to be simplified. In addition, through set up first circuit board 130 and second circuit board 140 in the relative both sides of casing 110 for the components and parts that constitute mutual-inductor subassembly 100 are comparatively dispersed, avoid components and parts on first circuit board 130 and the second circuit board 140 to concentrate together and lead to generating heat comparatively concentrated problem, and so, can disperse the heat source, stability and security when promoting the use.

As shown in fig. 1 and 3, the housing 110 includes a plurality of cavities 112, a position-limiting pillar 114 is disposed in each cavity 112, and the induction coil 120 is disposed in the cavity 112 and sleeved on the position-limiting pillar 114.

For example, the number of the chambers 112 may be three, the number of the induction coils 120 may also be three, each chamber 112 is provided with a limiting column 114, and the induction coils 120 are sleeved on the limiting columns 114, so that the coils can be limited, the induction coils 120 are prevented from shaking, and the stability in use is improved.

The arrangement form of the limiting column 114 and the cavity 112 is not particularly limited in the embodiment of the present application, for example, the cross section of the limiting column 114 may be rectangular or circular, and in addition, the limiting column 114 is in a hollow state, so that a conductor passes through the limiting column 114, and thus the conductor is measured by the mutual inductor assembly 100. Meanwhile, the chamber 112 may be a rectangular space or a circular space, as long as the induction coil 120 is isolated from each other and the induction coil 120 is limited.

As shown in fig. 2 and 4, a partition 116 is disposed between adjacent chambers 112, a through groove 1162 penetrating through the partition 116 is disposed in the partition 116, the through groove 1162 extends toward the first circuit board 130 and the second circuit board 140, and the first circuit board 130 and the second circuit board 140 are connected by a connector 150 penetrating through the through groove 1162.

Specifically, through set up the logical groove 1162 that runs through baffle 116 in baffle 116, conveniently connect first circuit board 130 and second circuit board 140 through wearing to locate the connecting piece 150 in logical groove 1162 to do not occupy extra space when first circuit board 130 and second circuit board 140 are connected, can make full use of casing 110 self space, with better promotion space utilization. In addition, when the first circuit board 130 and the second circuit board 140 are connected, a desired connection relationship may be formed through the through groove 1162 of one of the partition boards 116 according to actual needs, or a desired connection relationship may be formed by using two partition boards 116 at the same time. Therefore, when the first circuit board 130 and the second circuit board 140 are connected, the connection power of the connection member 150 can be dispersed, so that the heat generated by the connection member 150 is dispersed, which is beneficial to better dispersing the heat source, and thus the stability of the transformer assembly 100 during use is improved.

In an alternative embodiment of the present application, the connector 150 may also be disposed on the adjacent side of the housing 110 where the first circuit board 130 is disposed, such that the first circuit board 130, the connector 150 and the second circuit board 140 form a half-enclosed state around the side of the housing 110 to form a desired connection relationship.

In alternative embodiments of the present application, the connector 150 includes a pin or a circuit board.

For example, when the connector 150 employs pins, taps may be respectively provided on the first circuit board 130 and the second circuit board 140, so that the pins are respectively inserted into the taps of the first circuit board 130 and the second circuit board 140 to form a desired electrical connection relationship. In addition, the number of the pins may be determined according to the connection relationship between the signal transmission and the circuit, which is not specifically limited in the embodiment of the present application.

When the connecting member 150 is a circuit board, two ends of the circuit board may be respectively configured as gold finger probes, and the first circuit board 130 and the second circuit board 140 may be respectively provided with slots, so that the circuit board is respectively inserted into the slots of the first circuit board 130 and the second circuit board 140, thereby forming a desired electrical connection relationship. It should be noted that, when a circuit board is adopted, the circuit board can be correspondingly provided with a fool-proof limiting hole, and the slot is correspondingly provided with a bulge, so that the circuit board can be inserted in a specific form, and the electric connection error can be avoided. The required electrical connection relation can also be formed by adopting a symmetrical form when the circuit is printed on the circuit board and directly adopting a blind plugging form.

As shown in fig. 3 and 4, the housing 110 is provided with a first groove 117 and a second groove 118, respectively, wherein the first circuit board 130 is disposed in the first groove 117, and the second circuit board 140 is disposed in the second groove 118.

Specifically, by arranging the first groove 117 on the housing 110, when the first circuit board 130 is arranged in the first groove 117, the first circuit board 130 can be limited, and the first circuit board 130 is prevented from protruding out of the space of the housing 110, so that the transformer assembly 100 is improved in compactness, and the first circuit board 130 is protected. Similarly, by arranging the second groove 118 on the housing 110, when the second circuit board 140 is arranged in the second groove 118, the second circuit board 140 can be limited, so that shaking is avoided, and the second circuit board 140 can be prevented from protruding out of the space of the housing 110, so that the second circuit board 140 is protected.

In addition, a mounting hole may be disposed at the bottom of the first groove 117 or the second groove 118, and positioning holes are correspondingly disposed on the first circuit board 130 and the second circuit board 140, so that the first circuit board 130 and the second circuit board 140 can be fastened and positioned between the mounting hole and the housing 110 by fasteners penetrating through the positioning holes, so as to ensure the stability of connection.

As shown in fig. 1, the first circuit board 130 is provided with a connection terminal 132, and the connection terminal 132 is used for electrical connection with a controller of the circuit breaker. Therefore, the controller can judge the current working state of the circuit breaker according to the current detected by the acquired transformer assembly 100, so that the on-off of the circuit breaker can be controlled according to the working state, or the remote transmission of signals is realized, and the intellectualization and the automation of the circuit breaker are improved.

In an alternative embodiment of the present application, the first circuit board 130 is provided with a current detection circuit, and the second circuit board 140 is provided with a current conversion circuit. For example, the first circuit board 130 and the second circuit board 140 may be respectively provided with components such as a resistor, a diode, a triode, or a capacitor, but the first circuit board 130 and the second circuit board 140 may respectively realize respective main functions, and after the first circuit board 130 and the second circuit board 140 are connected, a complete detection circuit forming the transformer assembly 100 is formed, so as to achieve the purposes of dispersedly arranging the components and improving the heat dissipation capability.

The embodiment of the present application further provides a circuit breaker, which includes the transformer assembly 100 in the foregoing embodiments, and the transformer assembly 100 is located in a housing of the circuit breaker. The circuit breaker includes the same structure and benefits as the transformer assembly 100 in the previous embodiment. The structure and advantages of the transformer assembly 100 have been described in detail in the foregoing embodiments, and are not repeated herein.

As shown in fig. 5, the circuit breaker further includes a third circuit board 180, a temperature sensor 182 is disposed on the third circuit board 180, a bracket 160 and a stationary contact 170 disposed on the bracket 160 are further disposed in the housing, the bracket 160 includes a hollow pillar 162 abutting against a contact 172 of the stationary contact 170, and the temperature sensor 182 is disposed in the hollow pillar 162 to detect a temperature at the contact 172.

The transformer assembly 100 and the bracket 160 can be assembled as different modules to form a complete circuit breaker, and only need to be reasonably arranged in the shell of the circuit breaker to perform non-contact measurement on a load loop. When the installation is performed, the bracket 160 and the fixed contact 170 on the bracket 160 may be installed as one installation module, and after each module is assembled, the circuit breaker may be subjected to final assembly operation, so as to improve the assembly efficiency.

By abutting the hollow column 162 against the contact 172 of the fixed contact 170, when the movable contact contacts the fixed contact 170, the hollow column 162 and the movable contact are respectively located at two sides of the contact 172 of the fixed contact 170. When the fixed contact 170 and the moving contact are closed, in order to ensure the stability of the contact and avoid the problems of excessive local heating or unstable load loop caused by poor contact, the moving contact is usually provided with an overtravel to close the fixed contact 170 and the moving contact tightly. By adopting the form, the static contact 170 can be supported strongly, and the phenomenon that the static contact 170 is closed with a moving contact for a long time or frequently to deform under stress and influence the contact stability is avoided.

In addition, the temperature sensor 182 is arranged in the hollow upright post 162, the temperature sensor 182 can be protected by the hollow upright post 162 on a physical layer, and when the hollow upright post 162 is an insulator, the temperature sensor 182 can be insulated and isolated by the insulation characteristic of the hollow upright post 162, which is beneficial to ensuring the stability of the temperature sensor 182 in use. When the temperature sensor 182 is disposed within the hollow post 162, the temperature sensor 182 is brought into close proximity to the contact 172 to facilitate more accurate sensing of the temperature at the contact 172.

As shown in fig. 5, the third circuit board 180 is further provided with a connection terminal 184, the connection terminal 184 is connected to the first circuit board 130 or the second circuit board 140 of the transformer assembly 100, the bracket 160 is further provided with a transformer 190, and the transformer 190 is connected to the third circuit board 180 and used for sensing the current of the stationary contact 170.

Specifically, a transformer 190 may also be disposed at the fixed contact 170, the transformer 190 is located on the bracket 160 and is matched with the fixed contact 170, so as to detect a current value at the fixed contact 170, and the detected information may be transmitted to the first circuit board 130 or the second circuit board 140 through the connection terminal 184. In addition, the third circuit board 180 is further provided with a temperature sensor 182, temperature information detected by the temperature sensor 182 can be transmitted to the first circuit board 130 or the second circuit board 140 through the connection terminal 184, and it can be understood that the third circuit board 180 can also be directly connected with a controller of the circuit breaker through the connection terminal 184, and the third circuit board can be flexibly set according to an actual setting form, so that a space structure in the circuit breaker can be better utilized.

In an optional embodiment of the present application, a conventional transformer is disposed at the fixed contact 170, so as to detect a current value at the fixed contact 170 for circuit protection, and the transformer disposed on the transformer assembly 100 is of a meter level and is used for high-precision metering. Of course, an electric-grade transformer may be disposed at the fixed contact 170, and a conventional transformer is disposed on the transformer assembly 100.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The mutual inductor assembly (100) is characterized by comprising a shell (110), wherein an induction coil (120) is arranged in the shell (110), the induction coil (120) is used for being arranged corresponding to a circuit loop of a circuit breaker to induce current of the circuit loop, a first circuit board (130) and a second circuit board (140) which are electrically connected are respectively arranged on two opposite sides of the shell (110), and the induction coil (120) is electrically connected with the first circuit board (130) or the second circuit board (140).

2. The transformer assembly (100) of claim 1, wherein the housing (110) comprises a plurality of chambers (112), each chamber (112) having a restraint post (114) disposed therein, the induction coil (120) being disposed within the chamber (112) and fitting over the restraint post (114).

3. The transformer assembly (100) according to claim 2, wherein a partition (116) is arranged between the adjacent chambers (112), a through groove (1162) penetrating through the partition (116) is arranged in the partition (116), the through groove (1162) extends towards the first circuit board (130) and the second circuit board (140), and the first circuit board (130) and the second circuit board (140) are connected through a connecting piece (150) arranged in the through groove (1162).

4. The transformer assembly (100) of claim 3, wherein the connector (150) comprises a pin or a circuit board.

5. The transformer assembly (100) according to any one of claims 1 to 4, wherein the housing (110) is provided with a first recess (117) and a second recess (118), respectively, wherein the first circuit board (130) is disposed in the first recess (117) and the second circuit board (140) is disposed in the second recess (118).

6. The transformer assembly (100) according to any one of claims 1 to 4, characterized in that a connection terminal (132) is provided on the first circuit board (130), the connection terminal (132) being adapted to be electrically connected to a controller of the circuit breaker.

7. The transformer assembly (100) according to any one of claims 1-4, characterized in that a current detection circuit is provided on the first circuit board (130) and a current conversion circuit is provided on the second circuit board (140).

8. A circuit breaker comprising a transformer assembly (100) according to any of claims 1-7, the transformer assembly (100) being located within a housing of the circuit breaker.

9. The circuit breaker according to claim 8, further comprising a third circuit board (180), wherein a temperature sensor (182) is disposed on the third circuit board (180), a bracket (160) and a fixed contact (170) disposed on the bracket (160) are further disposed in the housing, the bracket (160) includes a hollow pillar (162) abutting against a contact (172) of the fixed contact (170), and the temperature sensor (182) is disposed in the hollow pillar (162) to detect a temperature at the contact (172).

10. The circuit breaker according to claim 9, wherein a connection terminal (184) is further disposed on the third circuit board (180), the connection terminal (184) is connected to the first circuit board (130) or the second circuit board (140) of the transformer assembly (100), a transformer (190) is further disposed on the bracket (160), and the transformer (190) is connected to the third circuit board (180) for sensing a current of the stationary contact (170).

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