CN210692309U

CN210692309U - Current transformer for switching power supply

Info

Publication number: CN210692309U
Application number: CN201921844497.XU
Authority: CN
Inventors: 潘文韬; 吴昌松
Original assignee: Lujiang Herun Technology Co Ltd
Current assignee: Lujiang Herun Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-06-05
Anticipated expiration: 2029-10-30

Abstract

The utility model relates to a current transformer for a switch power supply, which comprises a magnetic core, wherein a winding coil is wound on the magnetic core, a signal output pin is arranged on the winding coil, the magnetic core is in a mouth shape, one side edge of the magnetic core is arranged as a movable magnetic core and movably connected with two adjacent side edges; the utility model discloses simple structure, economical and practical, the cost is lower, adopts such movable magnetic core structure to measure the power cord that awaits measuring when can make things convenient for the later stage to use, need not damaged power cord, and the security is good, need not broken wire, also need not original arrangement mutual-inductor, and it is more convenient to use.

Description

Current transformer for switching power supply

Technical Field

The utility model belongs to the technical field of the current is mutual-inductive, especially, relate to a current transformer field for switching power supply.

Background

A Current transformer (CT for short) can convert a primary Current with a large value into a secondary Current with a small value through a certain transformation ratio, and is used for protection, measurement and the like; for example, a current transformer with a transformation ratio of 400/5 can convert the current of 400A into the current of 5A; the common current transformer adopts an annular magnetic core or a plurality of circles are wound on a framework, so that a required pulse signal can be obtained on a signal winding; however, such an implementation method is relatively complex, for example, a winding on the transformer usually has hundreds of turns, the manual winding cost is very high, although the number of turns of the sampled current winding is small, the winding is very inconvenient, and in general, the current to be measured needs to be connected to the winding which is arranged on the magnetic core in advance and used for the current to be measured, such a method solves the winding problem of the current to be measured to a certain extent, but in this way, the electric wire of the current to be measured needs to be damaged or the current to be measured needs to be wound on the magnetic core of the current transformer in advance, the use scene is very limited, and the damage to the power line also has the; therefore, a current transformer which can be conveniently used in the later period and does not damage a current power line to be detected is lacked.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a current transformer that destroys the current power cord that awaits measuring when need not the later stage use simple structure, with low costs in order to solve above-mentioned problem just.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a current transformer for switching power supply, includes the magnetic core, the coiling has the coiling on the magnetic core, is provided with signal output pin on the coiling, the magnetic core is the mouth shape, one side of magnetic core is established to movable magnetic core, rather than adjacent both sides limit swing joint.

As a further optimization scheme of the utility model, one end of the movable magnetic core is hinged with the adjacent side edge, and the other end is provided with a clamping column; a groove is arranged on the magnetic core far away from the hinged part, and the clamping column is embedded in the groove; through recess and card post, can fix the activity magnetic core on adjacent magnetic core, prevent that the activity magnetic core from taking place to rock.

As a further optimization scheme of the utility model, the mutual inductor further comprises a shell, the shell is covered on the magnetic core and the winding coil, and the shell covered at the movable magnetic core is connected with the shell at the adjacent side edge in a buckling manner; the cooperation of further fixed movable magnetic core and adjacent magnetic core through the lock between the casing.

As a further optimization scheme of the utility model, signal output pin adopts the mode setting of table subsides or cut straightly on the magnetic core.

As a further optimization scheme of the utility model, the junction of signal output pin and magnetic core is equipped with the insulating layer.

The beneficial effects of the utility model reside in that:

1) the utility model can measure the power line to be measured conveniently in later use by arranging the movable magnetic core without damaging the power line;

2) the structure has better applicability, the movable magnetic core is directly opened, and the current transformer is sleeved on the power line, so that the use is more convenient;

3) the utility model discloses well simple structure, economical and practical, the cost is lower.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic cross-sectional view of the movable magnetic core and the magnetic core of the present invention;

in the figure: 1. a magnetic core; 11. a movable magnetic core; 2. winding a coil; 3. a signal output pin; 4. clamping the column; 5. a groove; 6. a housing.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

As shown in fig. 1 and 2, the current transformer for a switching power supply includes a magnetic core 1, a wound coil 2 is wound on the magnetic core 1, a signal output pin 3 is arranged on the wound coil 2, the magnetic core 1 is in a mouth shape, one side of the magnetic core 1 is a movable magnetic core 11, and the movable magnetic core is movably connected with the magnetic cores 1 on two adjacent sides; one end of the movable magnetic core 11 is hinged with the adjacent side magnetic core 1;

in order to facilitate the relative fixation of the movable magnetic core and the adjacent magnetic core and prevent the movable magnetic core from shaking, a clamping column 4 is arranged at the other end of the movable magnetic core 11 away from the hinge joint, a groove 5 is arranged on the magnetic core 1 adjacent to the movable magnetic core away from the hinge joint, and the clamping column 4 is embedded in the groove 5; meanwhile, the groove and the clamping column can be set to be in an isosceles trapezoid shape in cross section, so that the clamping column can be more conveniently embedded into the groove;

for the convenience of daily use, a shell 6 is arranged on the mutual inductor, and the shell 6 is covered on the magnetic core 1 and the wound coil 2; in order to make the movable magnetic core more stable after being closed, the shell 6 covered on the movable magnetic core 11 can be buckled and connected with the shell 6 at the adjacent side edge;

the signal output pin 3 is arranged on the magnetic core 1 in a surface-mounted or direct-inserted mode; and an insulating layer is arranged at the joint of the signal output pin 3 and the magnetic core 1.

The principle is that at present, the commonly used current transformers all adopt an annular magnetic core or a plurality of circles are wound on a framework, so that the required pulse signals can be obtained on a signal winding; that is to say, the magnetic core is generally closed, then the detection coil and the coil of the current to be detected are respectively wound on two sides of the magnetic core, or like an annular current transformer, the detection coil is wound on the magnetic core and is used for connecting an instrument to detect the current, and then the power line to be detected passes through the annular magnetic core; although the detection function can be realized in principle, the detection method has great limitation, and generally, the method is limited to connect a current power line to be detected on a winding which is arranged on a magnetic core in advance and used for the current to be detected, or to pass through the magnetic core 1 in advance; for the first method, the detected power line is broken and connected in parallel with a preset interface on the mutual inductor when the general poison is prepared for measurement, but the fracture always has risk after the measurement is finished; as for the second mode, although the wire breaking is not needed, the problem that the current of the power line can be detected at any time without wire breaking under the condition that the mutual inductor is not arranged in advance cannot be solved; therefore, in the scheme, one part of the magnetic core is movably arranged, the movable magnetic core is partially opened when the magnetic core is ready to be used, the power wire to be detected is placed in the middle of the magnetic core or wound on the magnetic core, then the movable magnetic core is closed, and the magnetic core still forms a complete closed magnetic circuit; the normal use of the current transformer is not influenced.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a current transformer for switching power supply, includes magnetic core (1), it has wound system coiling (2) on magnetic core (1), is provided with signal output pin (3) on coiling (2), its characterized in that: the magnetic core (1) is in a mouth shape, one side edge of the magnetic core (1) is set to be a movable magnetic core (11) which is movably connected with the two adjacent side edge magnetic cores (1).

2. A current transformer for a switching power supply according to claim 1, characterized in that: one end of the movable magnetic core (11) is hinged with the adjacent side magnetic core (1), and the other end is provided with a clamping column (4); keep away from and be equipped with recess (5) on articulated magnetic core (1), card post (4) are inlayed and are located in recess (5).

3. A current transformer for a switching power supply according to claim 1, characterized in that: the mutual inductor further comprises a shell (6), the shell (6) is covered on the magnetic core (1) and the winding coil (2), and the shell (6) covered on the movable magnetic core (11) is connected with the shell (6) on the adjacent side edge in a buckling mode.

4. A current transformer for a switching power supply according to claim 1, characterized in that: the signal output pins (3) are arranged on the magnetic core (1) in a surface-mounted or direct-inserted mode.

5. A current transformer for a switching power supply according to claim 4, characterized in that: and an insulating layer is arranged at the joint of the signal output pin (3) and the magnetic core (1).