CN215375565U

CN215375565U - Novel current closed-loop sensor

Info

Publication number: CN215375565U
Application number: CN202121400536.4U
Authority: CN
Inventors: 潘汉金
Original assignee: Banning Nanjing Sensing Technology Co ltd
Current assignee: Banning Nanjing Sensing Technology Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-12-31
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a novel current closed-loop sensor which comprises a base, a supporting plate and a magnetic gathering ring, wherein a Hall device is fixed on the inner top surface of the magnetic gathering ring, a multi-turn winding is fixed in an inner cavity of the magnetic gathering ring, a current input end and a current output end are arranged on one side of the outer surface of the supporting plate, a secondary winding is fixed in the center of the supporting plate, a first power tube and a second power tube are respectively fixed on two sides of the secondary winding, a power amplifier is fixed at the bottom of the secondary winding, two ends of the multi-turn winding are respectively electrically connected with the current input end and the power amplifier, and the power amplifier is electrically connected with the current output end. The novel current closed-loop sensor is simple in structure, novel in design and convenient to use, effectively solves the problem of weak anti-electromagnetic interference capability, and further greatly improves the detection effect.

Description

Novel current closed-loop sensor

Technical Field

The utility model belongs to the technical field of current measurement, and particularly relates to a novel current closed-loop sensor.

Background

Small power supply devices have merged more and more new technologies. Such as switching power supplies, hard switching, soft switching, voltage regulation, linear feedback regulation, magnetic amplifier technology, digitally controlled voltage regulation, PWM, SPWM, electromagnetic compatibility, and the like. The actual demand directly promotes the continuous development and progress of power supply technology, in order to automatically detect and display current and have automatic protection function and higher intelligent control when dangerous conditions such as overcurrent and overvoltage occur, the power supply technology with sensing detection, sensing sampling and sensing protection gradually becomes a trend, and sensors for detecting current or voltage are produced and are gradually favored by vast power supply designers in China. The current sensor is a detection device which can sense the information of the current to be detected and convert the sensed information into an electric signal meeting certain standards or other information in required forms according to a certain rule for output so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. However, the conventional current sensor also has the defects of easy interference and poor detection effect in the detection process, and how to optimize the detection effect is one of the problems to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel current closed-loop sensor to solve the problems that the traditional current sensor is easy to interfere in the detection process and poor in detection effect.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel current closed loop sensor, includes base, backup pad and gathers magnetic ring, it is fixed with hall device to gather magnetic ring's interior top surface, it is fixed with the multiturn winding to gather magnetic ring's inner chamber, one side of backup pad surface is equipped with current input end and current output end, the center department of backup pad is fixed with secondary, secondary's both sides are fixed with first power tube and second power tube respectively, secondary's bottom is fixed with power amplifier, the both ends of multiturn winding respectively with current input end and power amplifier electric connection, power amplifier and current output end electric connection, first power tube pass through the wire respectively with current input end and the one end electric connection of multiturn winding, the second power tube pass through the wire respectively with secondary and the other end electric connection of multiturn winding.

Preferably, the base, the supporting plate and the magnetic gathering ring are designed in an integrated mode, the central axes of the base, the supporting plate and the magnetic gathering ring coincide, the width of the base, the width of the supporting plate and the width of the magnetic gathering ring are 24mm, the length of the base is 100mm, the total height of the base, the total height of the supporting plate and the total height of the magnetic gathering ring is 107mm, the base, the supporting plate and the magnetic gathering ring are all made of ABS engineering plastics, the supporting plate and the magnetic gathering ring are both of a cavity structure, and metal shielding covers are arranged on the outer surfaces of the supporting plate and the magnetic gathering ring.

Preferably, the Hall device adopts a Hall semiconductor element of H3020/SS495 model under HONEYWELL brand, and the operating temperature of the Hall device is-55-150 ℃.

Preferably, the current input end is connected with an external power supply, and the external power supply adopts a stabilized voltage power supply.

Preferably, the current output end is electrically connected with an external LED display screen.

Preferably, an electric isolation plate is fixed between the multi-turn winding and the secondary winding, and the isolation voltage of the electric isolation plate is not lower than 9600 Vrms.

The utility model has the technical effects and advantages that: this novel current closed loop sensor simple structure, the modern design, convenient to use can measure direct current, exchange and various pulse current, through setting up metal shield cover and electric division board, makes it at electric high-insulated, has effectively solved the problem that anti-electromagnetic interference ability is weak, and then has improved the detection effect greatly, in addition, still has advantages such as good linearity, the reaction time of optimization, many electric current range and small.

Drawings

FIG. 1 is a schematic control diagram of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a vertical cross-sectional view of the present invention;

fig. 4 is a top view of the present invention.

In the figure: 1. a base; 2. a support plate; 3. a magnetic gathering ring; 4. a Hall device; 5. a wire; 6. a first power tube; 7. a multi-turn winding; 8. a power amplifier; 9. a current input terminal; 10. a current output terminal; 11. a metal shield case; 12. a second power tube; 13. a secondary winding; 14. an electrical isolation plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

The utility model provides a novel current closed loop type sensor as shown in the figure, which comprises a base 1, a support plate 2 and a poly-magnetic ring 3, wherein a Hall device 4 is fixed on the inner top surface of the poly-magnetic ring 3, a multi-turn winding 7 is fixed in the inner cavity of the poly-magnetic ring 3, a current input end 9 and a current output end 10 are arranged on one side of the outer surface of the support plate 2, a secondary winding 13 is fixed at the center of the support plate 2, a first power tube 6 and a second power tube 12 are respectively fixed on two sides of the secondary winding 13, a power amplifier 8 is fixed at the bottom of the secondary winding 13, two ends of the multi-turn winding 7 are respectively electrically connected with the current input end 9 and the power amplifier 8, the power amplifier 8 is electrically connected with the current output end 10, the first power tube 6 is respectively electrically connected with the current input end 9 and one end of the multi-turn winding 7 through a lead 5, the second power tube 12 is electrically connected with the secondary winding 13 and the other end of the multi-turn winding 7 through the lead 5.

In addition, base 1, backup pad 2 and gather magnetic ring 3 and adopt the integral type design and the axis coincides mutually, the width that base 1, backup pad 2 and gather magnetic ring 3 is 24mm, the length of base 1 is 100mm the total height of base 1, backup pad 2 and gathering magnetic ring 3 is 107mm, the material of base 1, backup pad 2 and gathering magnetic ring 3 is ABS engineering plastics, wherein, backup pad 2 and gather magnetic ring 3 and all be cavity structure and the surface all is equipped with metallic shield 11, have the structure firm, small advantage, still have very strong anti-electromagnetic interference ability simultaneously, are favorable to improving the precision and the stability that current sensor detected. The Hall device 4 is a Hall semiconductor element of H3020/SS495 model under HONEYWELL brand, the working temperature of the Hall device 4 is-55-150 ℃, and the Hall device has high sensitivity, good output linearity and good temperature performance.

It is worth mentioning that the current input end 9 is connected with an external power supply, and the external power supply adopts a voltage-stabilized power supply, which is beneficial to providing stable power voltage, and further improves the detection precision of the sensor. The current output end 10 is electrically connected with an external LED display screen, so that detection information can be conveniently and clearly displayed in real time. An electric isolation plate 14 is fixed between the multi-turn winding 7 and the secondary winding 13, and the isolation voltage of the electric isolation plate 14 is not lower than 9600Vrms, so that the multi-turn winding 7 and the secondary winding 13 are electrically isolated, mutual influence is prevented, and the detection precision is further guaranteed.

The working principle is as follows: when this novel current closed loop sensor uses, at first with the electric current access current input end 9 that awaits measuring, magnetic field on the wire 5 is gathered by magnetic collecting ring 3 and is transmitted to hall device 4 on, first power tube 6 is opened this moment, then a compensating current flows in multiturn winding 7, then output and show current information on the display screen by current output end 10 after amplifying through power amplifier 8, when the electric current takes place to fluctuate, second power tube 12 is opened, a current flows into secondary winding 13 this moment and produces the magnetic flux and keep magnetic balance after compensating, hall device 4 then is in the effect that detects zero magnetic flux all the time.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a novel current closed loop sensor, includes base (1), backup pad (2) and gathers magnetic ring (3), its characterized in that: a Hall device (4) is fixed on the inner top surface of the magnetic gathering ring (3), a multi-turn winding (7) is fixed in an inner cavity of the magnetic gathering ring (3), a current input end (9) and a current output end (10) are arranged on one side of the outer surface of the supporting plate (2), a secondary winding (13) is fixed in the center of the supporting plate (2), a first power tube (6) and a second power tube (12) are respectively fixed on two sides of the secondary winding (13), a power amplifier (8) is fixed at the bottom of the secondary winding (13), two ends of the multi-turn winding (7) are respectively electrically connected with the current input end (9) and the power amplifier (8), the power amplifier (8) is electrically connected with the current output end (10), the first power tube (6) is respectively electrically connected with the current input end (9) and one end of the multi-turn winding (7) through a lead (5), the second power tube (12) is electrically connected with the secondary winding (13) and the other end of the multi-turn winding (7) through a lead (5) respectively.

2. The novel closed-loop current sensor as claimed in claim 1, wherein: the base (1), the supporting plate (2) and the magnetism-gathering ring (3) are designed in an integrated mode, the central axes of the base (1), the supporting plate (2) and the magnetism-gathering ring (3) coincide with each other, the width of the base (1), the width of the supporting plate (2) and the width of the magnetism-gathering ring (3) are 24mm, the length of the base (1) is 100mm, the total height of the base (1), the supporting plate (2) and the magnetism-gathering ring (3) is 107mm, the base (1), the supporting plate (2) and the magnetism-gathering ring (3) are made of ABS engineering plastics, wherein the supporting plate (2) and the magnetism-gathering ring (3) are both of a cavity structure, and the outer surfaces of the supporting plate and the magnetism-gathering ring (3) are both provided with metal shielding cases (11).

3. The novel closed-loop current sensor as claimed in claim 1, wherein: the Hall device (4) adopts a Hall semiconductor element of H3020/SS495 model under HONEYWELL brand, and the working temperature of the Hall device (4) is-55-150 ℃.

4. The novel closed-loop current sensor as claimed in claim 1, wherein: the current input end (9) is connected with an external power supply, and the external power supply adopts a stabilized voltage power supply.

5. The novel closed-loop current sensor as claimed in claim 1, wherein: the current output end (10) is electrically connected with an external LED display screen.

6. The novel closed-loop current sensor as claimed in claim 1, wherein: an electric isolation plate (14) is fixed between the multi-turn winding (7) and the secondary winding (13), and the isolation voltage of the electric isolation plate (14) is not lower than 9600 Vrms.