CN212364399U

CN212364399U - Novel residual capacity mutual inductor for intelligent circuit breaker

Info

Publication number: CN212364399U
Application number: CN202022074279.1U
Authority: CN
Inventors: 杨雨; 李进; 潘军; 吴正新
Original assignee: Nanjing Shunyi Enjia Electric Co ltd
Current assignee: Nanjing Shunyi Enjia Electric Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-01-15
Anticipated expiration: 2030-09-21

Abstract

The invention provides a novel residual electric quantity mutual inductor for an intelligent circuit breaker, wherein an upper encloser and a lower encloser are combined to form a hollow shell, and a magnetic core, a detection coil, a power coil and a PCB (printed circuit board) are all arranged in the shell; the magnetic core is in an 8-shaped structure, the detection coil is in a rectangular structure, the upper part of the PCB is in a rectangular structure, the lower part of the PCB is in a left-right structure, and the upper part and the lower part of the PCB are connected; the lower surface of the PCB is tightly attached to the magnetic core, the detection coil is mounted on the upper portion of the upper surface of the PCB through the first pin insertion pin, the power coil is mounted on the lower portion of the upper surface of the PCB, two ends of the power coil are respectively connected with the left and right structures of the lower portion of the PCB through the second pin insertion pin, and the lower portion of the magnetic core penetrates through the power coil. The invention has small volume and high precision, and the precision can reach 0.2 percent of the metering level.

Description

Novel residual capacity mutual inductor for intelligent circuit breaker

Technical Field

The invention belongs to the technical field of low-voltage electric appliances, and particularly relates to a novel residual electric quantity mutual inductor for an intelligent circuit breaker.

Background

The residual capacity electric transformer is a key electronic component for current collection of the intelligent circuit breaker and power supply of the intelligent circuit breaker, and the conventional intelligent circuit breaker adopts the conventional residual capacity electric transformer which is commonly available in the market at present and is shown in figure 1. The residual electric quantity mutual inductor has the advantages of complex production process, easy saturation, low precision (5 percent) and large volume, and is not convenient to install. The latest technical requirements of customer accuracy of 0.2% have not been met.

Disclosure of Invention

The invention aims to provide a novel residual electric quantity transformer for an intelligent circuit breaker, which is small in size and high in precision up to 0.2% metering level by installing a PCB (printed circuit board) and a detection coil on one side of a magnetic core and combining with a power coil sleeved on the magnetic core.

The technical solution for realizing the purpose of the invention is as follows:

a novel residual electric quantity mutual inductor for an intelligent circuit breaker comprises an upper cover shell, a lower cover shell, a magnetic core, a detection coil, a power coil and a PCB circuit board, wherein the upper cover shell and the lower cover shell are combined to form a hollow shell, and the magnetic core, the detection coil, the power coil and the PCB circuit board are all arranged in the shell; the detection coil is of a rectangular structure, the upper part of the PCB is of a rectangular structure, the lower part of the PCB is of a left-right structure, and the upper part of the PCB is connected with the lower part of the PCB; the lower surface of the PCB is tightly attached to the magnetic core, the detection coil is mounted on the upper portion of the upper surface of the PCB through the first pin insertion pin, the power coil is mounted on the lower portion of the upper surface of the PCB, two ends of the power coil are respectively connected with the left and right structures of the lower portion of the PCB through the second pin insertion pin, and the lower portion of the magnetic core penetrates through the power coil.

Furthermore, the detection coil comprises a first coil and a second coil, the two first coils and the two second coils are arranged at intervals and sequentially connected end to end, and the first coil and the second coil are connected through a first pin contact pin to form a rectangular structure.

Furthermore, according to the novel residual power transformer for the intelligent circuit breaker, the number of turns of the first coil is different from that of the second coil.

Furthermore, according to the novel residual capacity mutual inductor for the intelligent circuit breaker, the magnetic cores are spliced in a bilateral symmetry structure to form an 8-shaped structure.

Furthermore, according to the novel residual electricity quantity mutual inductor for the intelligent circuit breaker, a plurality of wiring terminals are arranged on one side of the top end of the PCB.

Furthermore, according to the novel residual electricity quantity mutual inductor for the intelligent circuit breaker, the first pin contact pin and the second pin contact pin are welded on the PCB through soldering tin.

Compared with the prior art, the invention adopting the technical scheme has the following technical effects:

1. the novel residual electric quantity mutual inductor for the intelligent circuit breaker has the advantages of small volume and high precision, and the precision error can reach 0.2%.

2. The novel residual power transformer for the intelligent circuit breaker has the advantages of simple production process and easiness in processing and production.

3. The measuring coil adopted by the novel residual capacity mutual inductor for the intelligent circuit breaker removes a magnetic core, and cannot be saturated in use.

4. The novel residual capacity transformer for the intelligent circuit breaker can be compatible with current specifications of 125A 250A 400A630A 800A and the like at the same time.

Drawings

Fig. 1 is a prior art residual charge transformer.

Fig. 2 is an external structural view of the novel residual capacity transformer for the intelligent circuit breaker according to the present invention.

Fig. 3 is a schematic diagram of the internal structure of the novel residual capacity transformer for the intelligent circuit breaker according to the present invention.

Fig. 4 is a schematic diagram of a detection coil of the novel residual capacity transformer for the smart circuit breaker of the present invention.

Fig. 5 is a schematic view of a magnetic core of the novel residual capacity transformer for the smart circuit breaker of the present invention.

Fig. 6 is a schematic diagram of a power coil of the novel residual capacity transformer for the intelligent circuit breaker of the present invention.

Fig. 7 is a schematic diagram of a PCB circuit board of the novel residual capacity transformer for the smart circuit breaker of the present invention.

Fig. 8 is a schematic view of the upper case of the novel residual capacity transformer for the intelligent circuit breaker according to the present invention.

Fig. 9 is a schematic view of the lower case of the novel residual capacity transformer for the intelligent circuit breaker of the present invention.

Reference signs mean: 1: magnetic core, 2: detection coil, 21: first coil, 22: second coil, 23: first pin insertion, 3: power coil, 31: pin insertion, 4: lower housing, 5: PCB circuit board, 6: and (4) an upper cover shell.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A novel residual electric quantity mutual inductor for an intelligent circuit breaker comprises an upper cover shell 6, a lower cover shell 4, a magnetic core 1, a detection coil 2, a power coil 3 and a PCB circuit board 5, wherein the upper cover shell 6 and the lower cover shell 4 are combined to form a hollow shell, and the magnetic core 1, the detection coil 2, the power coil 3 and the PCB circuit board 5 are all arranged in the shell; the magnetic core 1 is in an 8-shaped structure, the detection coil 2 is in a rectangular structure, the upper part of the PCB 5 is in a rectangular structure, the lower part of the PCB is in a left-right structure, and the upper part and the lower part of the PCB 5 are connected; the lower surface of PCB circuit board 5 is hugged closely magnetic core 1 and is set up, and detection coil 2 installs on PCB circuit board 5's upper surface upper portion through first pin contact pin 23, and power coil 3 installs in PCB circuit board 5's upper surface lower part, and power coil 3's both ends respectively through second pin contact pin 31 and PCB circuit board 5's lower part left and right structural connection, and the lower part of magnetic core 1 runs through in power coil 3.

Example 1

A novel residual capacity mutual inductor for an intelligent circuit breaker comprises an upper cover shell 6, a lower cover shell 4, a magnetic core 1, a detection coil 2, a power coil 3 and a PCB circuit board 5. As shown in fig. 2, 8 and 9, the upper case 6 and the lower case 4 are combined to form a hollow case, and the magnetic core 1, the detection coil 2, the power coil 3 and the PCB 5 are mounted inside the case.

As shown in fig. 5, the magnetic core 1 has a structure of "8". The magnetic core 1 is in a left-right symmetrical structure and is spliced to form an 8-shaped structure.

As shown in fig. 4, the detection coil 2 has a rectangular structure. The detection coil 2 comprises a first coil 21 and a second coil 22, the two first coils 21 and the two second coils 22 are arranged at intervals and sequentially connected end to end, and the first coils 21 and the second coils 22 are connected through first pin contact pins 23 to form a rectangular structure. The first coil 21 and the second coil 22 have different numbers of turns.

As shown in fig. 7, the upper portion of the PCB circuit board 5 has a rectangular structure, the lower portion has a left-right structure, and the upper portion and the lower portion of the PCB circuit board 5 are connected. A plurality of connecting terminals 51 are arranged on one side of the top end of the PCB 5.

As shown in fig. 3, the lower surface of the PCB 5 is disposed closely to the magnetic core 1, the detection coil 2 is mounted on the upper surface of the PCB 5 through the first pin 23, the power coil 3 is mounted on the lower surface of the PCB 5, two ends of the power coil 3 are respectively connected to the left and right structures of the lower part of the PCB 5 through the second pin 31, and the lower part of the magnetic core 1 penetrates through the power coil 3 as shown in fig. 6.

The first pin 23 and the second pin 31 are soldered on the PCB 5 by soldering.

Example 2

The steps of assembling the novel residual capacity transformer for the intelligent circuit breaker are as follows:

step 1, assembling the detection coil 2: the first coil 21 and the second coil 22 are assembled by the first pin 23 to obtain the detection coil 2 in fig. 4.

And 2, assembling and welding the detection coil 2, the power coil 3, the PCB 5 and the magnetic core 1 to obtain the internal structure of the residual electric quantity transformer, as shown in fig. 3.

And step 3, assembling the internal structure, the upper housing 6 and the lower housing 4 to obtain the whole residual energy transformer, as shown in fig. 2.

The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power.

Claims

1. The novel residual electricity mutual inductor for the intelligent circuit breaker is characterized by comprising an upper cover shell (6), a lower cover shell (4), a magnetic core (1), a detection coil (2), a power coil (3) and a PCB (printed circuit board) (5), wherein the upper cover shell (6) and the lower cover shell (4) are combined to form a hollow shell, and the magnetic core (1), the detection coil (2), the power coil (3) and the PCB (printed circuit board) (5) are all arranged in the shell;

the magnetic core (1) is of an 8-shaped structure, the detection coil (2) is of a rectangular structure, the upper part of the PCB (5) is of a rectangular structure, the lower part of the PCB is of a left-right structure, and the upper part and the lower part of the PCB (5) are connected;

the lower surface of the PCB (5) is tightly attached to the magnetic core (1) to be arranged, the detection coil (2) is installed on the upper surface of the PCB (5) through a first pin insertion pin (23), the power coil (3) is installed on the lower portion of the upper surface of the PCB (5), two ends of the power coil (3) are respectively connected with the left and right structures of the lower portion of the PCB (5) through a second pin insertion pin (31), and the lower portion of the magnetic core (1) penetrates through the power coil (3).

2. The novel residual power transformer for the intelligent circuit breaker according to claim 1, wherein the detection coil (2) comprises a first coil (21) and a second coil (22), two first coils (21) and two second coils (22) are arranged at intervals and are sequentially connected end to end, and the first coils (21) and the second coils (22) are connected through a first pin (23) and form a rectangular structure.

3. The new type of remaining power transformer for intelligent circuit breaker according to claim 2, characterized in that the number of turns of the first coil (21) and the second coil (22) is different.

4. The novel residual power transformer for the intelligent circuit breaker according to claim 1, wherein the magnetic core (1) is spliced into a structure of a shape like a Chinese character '8' by a bilateral symmetry structure.

5. The novel residual power transformer for intelligent circuit breakers according to claim 1, characterized in that the top side of the PCB (5) is provided with a plurality of terminals (51).

6. The novel residual power transformer for the intelligent circuit breaker as claimed in claim 1, wherein the first pin (23) and the second pin (31) are soldered on the PCB (5) by soldering tin.