CN2470832Y - Current testing device - Google Patents
Current testing device Download PDFInfo
- Publication number
- CN2470832Y CN2470832Y CN 01200841 CN01200841U CN2470832Y CN 2470832 Y CN2470832 Y CN 2470832Y CN 01200841 CN01200841 CN 01200841 CN 01200841 U CN01200841 U CN 01200841U CN 2470832 Y CN2470832 Y CN 2470832Y
- Authority
- CN
- China
- Prior art keywords
- circuit board
- circuit
- magnetic
- coil
- detecting element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to a current detection device comprising a circuit board, a magnetic detection component arranged on the circuit board, a magnetic path which is wrapped with windings and arranged on the circuit board; the magnetic path is a rectangular magnetic path with hollow middle, the magnetic path is provided with a gap, the magnetic detection component is arranged in the gap; the rectangular surface of the magnetic path is placed vertical with the circuit board; the circuit board is provided with a perforation that the windings can go through; an insulation sleeving is provided between the windings and the magnetic; one section of the magnetic path wrapped with the windings is arranged fixedly at the side where electrical components are arranged on the circuit board; the back of the circuit board is covered by a copper foil in mostly area, the copper foil is grounded. The utility model is characterized by small volume.
Description
The utility model relates to a kind of current sensing means, particularly a kind of current sensing means that utilizes Hall effect to make.
Utilize the current detector of Hall effect to be widely used in the circuit arrangement that needs accurate Control current or emphasis overcurrent protection.Hall current detector is a kind of current with high accuracy pick-up unit, it is a principle of utilizing Hall effect, convert a magnetic field energy that conductor caused that is loaded with electric current to be measured to voltage signal, the circuit of current detector inside then is used for converting the voltage signal of hall detector induction to correspondent voltage or electric current output, and this voltage or electric current output then are proportional to the size of electric current to be measured.Because hall current detector is by treating that the magnetic field that the side electric current is produced carries out the measurement of electric current, so its circuit setting can isolate from current to be measured.
Fig. 1 is in order to the synoptic diagram of an existing open circuit hall current detector principle to be described.As shown in Figure 1, existing open circuit hall current detector comprises that a hall detector 1, one have fixedly Control current I of the magnetic circuit 2 in gap, supply
CTo circuit (not shown) and voltage amplifier 3 of hall detector 1, to increase the output voltage of hall detector 1.Conductor 4 with electric current I to be measured passes the opening of magnetic circuit 2, conductor 4 produces around conductor 4 and the magnetic field B that distributes along magnetic circuit 2, magnetic field B is subjected to magnetic circuit 2 concentratedly brings and passes the hall detector 1 that is positioned at the magnetic circuit gap together, at this moment, two output terminals 11 of hall detector 1 and 12 are promptly owing to Hall effect produces potential difference (PD), produce electric current thus and export and amplified output through amplifier 3.Common Control current I
CBe set as definite value, and Hall voltage V
HBe directly proportional with the magnetic flux density in magnetic field.
Existing hall current detector often volume is too huge, and it is big to take up room, and is unfavorable for it is installed in such as in the various electronic installations such as uninterrupted power supply (ups) Unity system, control motor, phase inverter.
Fundamental purpose of the present utility model provides a kind of volume little current sensing means, and adapting to compact electronic installation, and its configuration structure can keep good electric shield between its metering circuit and Ampereconductors to be measured.
For achieving the above object, the utility model is taked following technical measures:
Current sensing means of the present utility model comprises:
A circuit board that is provided with circuit component;
A magnetic detecting element that is located on the circuit board;
One is wound with coil and is located at magnetic circuit on the circuit board, and it is the middle rectangle magnetic circuit that is hollow form, and one section of this magnetic circuit has a gap, and magnetic detecting element is arranged in this gap;
The rectangular surfaces of magnetic circuit and circuit board vertical placement mutually, this circuit board is provided with a unfilled corner that is used to settle magnetic circuit;
Circuit board is provided with the perforate that the lead of being convenient to coil passes;
Insulate with an insulating sleeve between coil and magnetic circuit;
One section that is wound with coil on the magnetic circuit is fixed on and circuit board installing circuit component homonymy simultaneously;
The most of area in the back side that circuit board is not provided with circuit component covers a copper foil layer, copper foil layer ground connection.
Wherein, described magnetic detecting element is a Hall element.
Wherein, described magnetic detecting element is the encapsulation shape, and other element on the described circuit board all is plugged on the circuit board with inserting mode.
Wherein, described coil is to fix with solder joint at the back side of described circuit board.
Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present utility model:
The accompanying drawing simple declaration:
Fig. 1: the principle schematic of existing open circuit hall current detector.
Fig. 2: the vertical view of the utility model embodiment.
Fig. 3: the rear view of the utility model embodiment.
Fig. 4: the side view of the utility model embodiment.
Fig. 5: the opposite side view of the utility model embodiment.
As Fig. 2,4, with shown in 5, it represents an embodiment of the present utility model, and this current detector comprises that a circuit board that is provided with circuit component 21, one be located at magnetic detecting element 22 on the circuit board 21 and one and be wound with several circle coil of conductive wire 23 and be located at magnetic circuit 24 on the circuit board.Magnetic circuit 24 is magnetic rectangular-shaped loops of hollow in the middle of one, and magnetic circuit 24 a section by circuit board 21 offers a gap 241, and the upper right corner of circuit board 21 also is provided with a unfilled corner 211; Magnetic circuit 24 is arranged on the circuit board 21, circuit board 21 will pass among the gap 241, the part that is wound with coil 23 in the magnetic circuit 24 is arranged on the upper surface that circuit board 21 is equipped with circuit component, and the both ends of the surface of magnetic circuit 24 and coil 23 all with circuit board 21 mutual arranged perpendicular, one section of coil 23 magnetic circuit that is around in 24 then is parallel to each other with circuit board 21.In addition, on the circuit board 21 and be provided with perforate 212, can be two perforates 212, so as two lead-in wires 231 that make coil 23 via perforate 212 by extending the below of circuit board 21, these two lead-in wires, 231 input ends as current detector also can directly connect an electric current to be measured.
As Fig. 2,4, with shown in 5, magnetic detecting element 22 is a Hall element, and it is set at the circuit board position of passing gap 241, as shown in Figure 1, is subjected to a Control current I
CLike this, when electric current to be measured by input end flowing through coil 23 in the time, promptly can produce a magnetic field that parallels with magnetic circuit 24 bearing of trends that are wound with coil 23, the magnetic line of force in this magnetic field also concentrates in the magnetic circuit 24, and in gap 241, form vertical and pass the magnetic field of magnetic detecting element 22 with circuit board 21, the induction that this magnetic detecting element 22 is subjected to this magnetic field promptly produces potential difference (PD), and the voltage signal of the amplifying circuit on the circuit board 21 is led in generation, this amplifying circuit 213 is voltage amplifier shown in Figure 13, voltage signal amplifies via amplifying circuit 213, form the output signal of this current sensing means, this amplifying circuit 213 has 4 output terminal pins 214, and this pin is respectively an earth terminal, a signal output part, the positive and negative electrode of supply amplifier circuit power supply.
As shown in Figure 3, it is the rear view of the utility model embodiment, most of area of back of circuit board covers with a copper foil layer 215, since a section of being wound with coil 23 on the magnetic circuit 24 be fixed on circuit board on have the circuit component one side homonymy, and back of circuit board is not provided with circuit component, and the earth terminal on these copper foil layer 215 cooperations and the circuit board can make this current detector produce very effectively shield effectiveness.In addition, the lead-in wire 231 of coil 23 is to utilize solder joint 216 spot welding modes that wire coil 23 is fixed on the circuit board 21.
As shown in Figure 4, magnetic circuit 24 generally can be made by paramagnetic material, its outside also coats an insulating sleeve 242, again with coil 23 on a certain section of magnetic circuit, and, the material that this insulating sleeve 242 is adopted preferably has lower thermal expansivity, to prevent having influence on the elasticity of institute's coiling 23 on it because of heat energy causes insulating sleeve 242 overexpansions.
Consult Fig. 2,3, with 5, the mounting means of magnetic circuit 24 on circuit board 21, the lead-in wire that will be around in the coil 23 on the magnetic circuit 24 earlier passes two perforates 212 on the circuit board 21, take advantage of a situation again and circuit board 21 is passed the gap 241 of magnetic circuit 24, and a side that makes magnetic circuit 24 relies on the upper right unfilled corner 211 of circuit board 21, even also magnetic circuit 24 is all perpendicular with circuit board 21 with the both ends of the surface of coil 23, with viscose magnetic circuit 24 is fixed on the back side of circuit board 21 again.In addition, magnetic detecting element 22 is the encapsulation shape, and other circuit component then all is plugged on the circuit board 21.
Compared with prior art, the utlity model has following effect:
By the above as can be known, current detector provided by the utility model can be arranged on the small-sized circuit board fully, and its thickness depends on the magnetic circuit 24 that is wound with coil 23 fully, no matter how many numbers of turn of coil 23 is, the neither thickness that increases this current detector that causes is so the utility model can fully be realized compact advantage.In addition, because the most of area of back of circuit board all covers with copper foil layer 215,, influence minimum to the measured result of the utility model from the magnetic field of current detector place environment so the utility model possesses splendid electric shield.
Foregoing is to utilize embodiment that technical characterictic of the present utility model is described, is not to be used to limit protection domain of the present utility model, even there is the people to change slightly on the basis of the utility model design, must belong in the protection domain of the present utility model.
Claims (4)
1, a kind of current sensing means comprises:
A circuit board that is provided with circuit component;
A magnetic detecting element that is located on the circuit board;
One is wound with coil and is located at magnetic circuit on the circuit board, and it is the middle rectangle magnetic circuit that is hollow form, and one section of this magnetic circuit has a gap, and magnetic detecting element is arranged in this gap;
It is characterized in that:
The vertical placement mutually of magnetic circuit and circuit board, the unfilled corner that is provided with this magnetic circuit of arrangement of this circuit board;
Circuit board is provided with the perforate that two leads of being convenient to coil pass;
Insulate with an insulating sleeve between coil and magnetic circuit;
One section that is wound with coil on the magnetic circuit is fixed on and circuit board installing circuit component homonymy simultaneously;
The most of area in the back side that circuit board is not provided with circuit component covers a copper foil layer, this copper foil layer ground connection.
2, current sensing means according to claim 1 is characterized in that, described magnetic detecting element is a Hall element.
3, current sensing means according to claim 1 is characterized in that, described magnetic detecting element is the encapsulation shape, and other element on the described circuit board all is plugged on the circuit board with inserting mode.
According to each described current sensing means in the claim 1～3, it is characterized in that 4, described coil is to fix with solder joint at the back side of described circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01200841 CN2470832Y (en) | 2001-02-09 | 2001-02-09 | Current testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01200841 CN2470832Y (en) | 2001-02-09 | 2001-02-09 | Current testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2470832Y true CN2470832Y (en) | 2002-01-09 |
Family
ID=33623039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01200841 Expired - Fee Related CN2470832Y (en) | 2001-02-09 | 2001-02-09 | Current testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2470832Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7626376B2 (en) | 2006-09-20 | 2009-12-01 | Tokai Rika Co., Ltd. | Electric current detector having magnetic detector |
| CN101238378B (en) * | 2005-08-12 | 2011-11-30 | 机电联合股份有限公司 | Three-phase current sensor |
| CN105324674A (en) * | 2013-04-30 | 2016-02-10 | 艾思玛太阳能技术股份公司 | Method and device for monitoring and measuring a current on a magnetically biased choke |
| CN105866722A (en) * | 2016-06-17 | 2016-08-17 | 重庆所罗门智跑机械有限公司 | Current detection device and motor driving system |
| CN107390003A (en) * | 2017-08-21 | 2017-11-24 | 浙江中凯科技股份有限公司 | A kind of Hall electric current detecting apparatus |
-
2001
- 2001-02-09 CN CN 01200841 patent/CN2470832Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101238378B (en) * | 2005-08-12 | 2011-11-30 | 机电联合股份有限公司 | Three-phase current sensor |
| US7626376B2 (en) | 2006-09-20 | 2009-12-01 | Tokai Rika Co., Ltd. | Electric current detector having magnetic detector |
| CN105324674A (en) * | 2013-04-30 | 2016-02-10 | 艾思玛太阳能技术股份公司 | Method and device for monitoring and measuring a current on a magnetically biased choke |
| CN105324674B (en) * | 2013-04-30 | 2018-09-14 | 艾思玛太阳能技术股份公司 | Method and apparatus for monitoring and current measurement at magnetic bias choke |
| CN105866722A (en) * | 2016-06-17 | 2016-08-17 | 重庆所罗门智跑机械有限公司 | Current detection device and motor driving system |
| CN107390003A (en) * | 2017-08-21 | 2017-11-24 | 浙江中凯科技股份有限公司 | A kind of Hall electric current detecting apparatus |
| CN107390003B (en) * | 2017-08-21 | 2023-09-01 | 浙江中凯科技股份有限公司 | Hall current detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6545456B1 (en) | Hall effect current sensor package for sensing electrical current in an electrical conductor | |
| EP2965096B1 (en) | Method for sensing current in a conductor | |
| EP2965105B1 (en) | Sensing electrical current in a conductor | |
| US7977934B2 (en) | High bandwidth open-loop current sensor | |
| JP2011080970A (en) | Detection device of multiphase current | |
| CN1957261A (en) | Current sensor | |
| CN2470832Y (en) | Current testing device | |
| JP2024533846A (en) | Current Sensors | |
| ES2769379T3 (en) | Electric current measuring device, current measuring apparatus and manufacturing procedure of current measuring device | |
| CN100443903C (en) | Open-loop electric current sensor and a power supply circuit provided with such sensors | |
| US20220099708A1 (en) | Current transducer with magnetic field detector module | |
| JP5630633B2 (en) | Multiphase current detector | |
| Liu et al. | An online monitoring method for single aluminum electrolytic capacitor in the DC bank of single-phase inverter based on the Rogowski coil | |
| CN109799380B (en) | Integrated current sensor and packaging method thereof | |
| JP2014085248A (en) | Current sensor and current detection method | |
| US20200182913A1 (en) | Current sensor for measuring alternating electromagnetic wave and a current breaker using the same | |
| CN112630503A (en) | Device structure with direct current and arc discharge current detection, sensor and processing system | |
| CN206059301U (en) | The Wiring structure of chopper | |
| JP2020148640A (en) | Current detector | |
| CN2489343Y (en) | A.C. sensor | |
| JP2011209256A (en) | Device for detecting polyphase current | |
| CN219201749U (en) | Digital voltage sensor | |
| JPH01240867A (en) | Current detector | |
| CN117269584B (en) | Current detection module | |
| CN211206605U (en) | Hall current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |