CN208902785U - A kind of current sensor with automatic short circuit function - Google Patents
A kind of current sensor with automatic short circuit function Download PDFInfo
- Publication number
- CN208902785U CN208902785U CN201820800189.6U CN201820800189U CN208902785U CN 208902785 U CN208902785 U CN 208902785U CN 201820800189 U CN201820800189 U CN 201820800189U CN 208902785 U CN208902785 U CN 208902785U
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- current sensor
- short circuit
- circuit function
- automatic short
- air switch
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Abstract
The utility model discloses a kind of current sensors with automatic short circuit function, the current sensor with automatic short circuit function includes firm banking, support base and annular core, the support base is fixedly connected on the firm banking, the annular core has an input perforation, the described input perforation for penetrating a current bus bar, on the current bus bar on be passed through electric current；The annular core has an opening, a hall device is provided in the opening, the both ends of the hall device are respectively connected to the input port of an amplifier, the current sensor with automatic short circuit function of the utility model, when excessive by the electric current of the current sensor, in order to avoid burning out the current sensor, first air switch and second air switch automatically turn on or closure, to select suitable outlet line, suitable for various occasions, it is easy to operate, effectively reduce the impaired probability of current sensor.
Description
Technical field
The utility model relates to current detecting equipment technical field, specially a kind of electric current with automatic short circuit function is passed
Sensor.
Background technique
Current sensor is a kind of detection device, can experience the information of tested electric current, and can will test the letter experienced
Breath is for conversion into the information output of the electric signal or other required forms that meet certain standard needs, according to certain rules to meet
The requirement such as transmission, processing, storage, display, record and control of information.Current sensor is also referred to as Magnetic Sensor, can be in household
Electric appliance, smart grid, electric vehicle, wind-power electricity generation etc. all use many Magnetic Sensors in we live, such as computer is hard
Disk, compass, household electrical appliance etc..
Current sensor is different according to measuring principle, can be divided mainly into: current divider, electromagnetic current transducer, electronic type
Current transformer etc..Electronic current mutual inductor includes Hall current sensor, Rogowski current sensor and is exclusively used in
AnyWay variable-frequency power sensor (can be used for voltage, electric current and power measurement) of frequency conversion electrical measurement etc..With electromagnetic type electric current
Sensor compares, and electronic current mutual inductor does not have ferromagnetic saturation, and transmission frequency bandwidth, secondary load capacity is small, size is small, again
Amount is light, is the developing direction of current sensor from now on.Fibre optic current sensor is based on Faraday magnetooptical effect, with optical fiber
For the New type of current sensor of medium.
But existing current sensor does not have automatic short circuit function, when power transmission line, which powers on, flows through big, is easy to
Burn current sensor.
Utility model content
The purpose of this utility model is to provide a kind of current sensors with automatic short circuit function, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the utility model provides the following technical solutions: one kind of the utility model has automatic short
The current sensor of road function, the current sensor with automatic short circuit function include firm banking, support base and ring
Shape iron core, the support base are fixedly connected on the firm banking, and the annular core has an input perforation, institute
The input perforation stated has been passed through electric current on the current bus bar for penetrating a current bus bar；
The annular core has an opening, is provided with a hall device, the hall device in the opening
Both ends be respectively connected to the input port of an amplifier, the output end of the amplifier is respectively connected to a N-type triode and P
The emitter of the base stage of type triode, the N type triode is connected with the collector of p-type triode, three pole of N-type
The collector of pipe and the cathode of power supply connect, and the emitter of the p-type triode is connect with the anode of the power supply, described
Annular core outside be wound with wire, one end of the wire is connect with the collector of the p-type triode, described
The other end of wire be connected with one first air switch, first air switch passes through a first resistor device and baseline
It connects, is also parallel with a second resistor on first air switch and the first resistor device and the second air is opened
It closes, exactly the opposite, the described second resistor of the switch state of second air switch and first air switch
Resistance value compared with the first resistor device is big.
Preferably, the both ends of the firm banking are provided with screw mounting hole, and the screw mounting hole is for pacifying
A screw is filled, the firm banking is fixed in a plane by the screw, convenient for fixed at any time and disassembly.
Preferably, zero degree adjusting knob and full scale adjusting knob are provided on the support base, for adjust zero degree and
Full scale.
Preferably, a parameter nameplate is additionally provided at the top of the annular core, for show it is described have it is automatic
The parameters of the current sensor of short-circuit function, to show the parameter situation of the current sensor of automatic short circuit function.
Preferably, the both ends of the hall device pass through the input terminal that a 3rd resistor device accesses an amplifier respectively
Mouthful, it plays a protective role.
Preferably, one end of the wire is connect with the emitter of the N-type triode.
Preferably, when second air switch is opened, first air switch is closed, second air
When switch is closed, first air switch is opened, and realizes a circuit conducting, the effect that a circuit disconnects.
Compared with prior art, the utility model has the beneficial effects that the utility model with automatic short circuit function
Current sensor, when excessive by the electric current of the current sensor, in order to avoid burning out the current sensor, institute
The first air switch and second air switch stated automatically turn on or closure is applicable in selecting suitable outlet line
It is easy to operate in various occasions, effectively reduce the impaired probability of current sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the current sensor provided by the utility model with automatic short circuit function；
Fig. 2 is the another structural schematic diagram of the current sensor provided by the utility model with automatic short circuit function；
In figure: 1 annular core, 2 wires, 3 current bus bars, 4 support bases, 5 zero degree adjusting knobs, 6 full scale adjusting knobs,
7 firm bankings, 8 screws, 9 screw mounting holes, 10 hall devices, 11 amplifiers, 12 3rd resistor devices, 13P type triode, 14N
Type triode, 15 first air switches, 16 first resistor devices, 17 second resistors, 18 second air switches.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As depicted in figs. 1 and 2, a kind of current sensor with automatic short circuit function of the utility model, the tool
The current sensor for having automatic short circuit function includes firm banking 7, support base 4 and annular core 1, and the support base 4 is fixed
It is connected on the firm banking 7, the annular core 1 has an input perforation, and the input is perforated for penetrating
One current bus bar 3 has been passed through electric current on the current bus bar 3；
The annular core 1 has an opening, is provided with a hall device 10, the Hall in the opening
The both ends of device 10 are respectively connected to the input port of an amplifier 11, and the output end of the amplifier 11 is respectively connected to a N
The base stage of type triode 14 and p-type triode 13, the emitter of the N-type triode 14 and the collector of p-type triode 13
Connection, the collector of the N-type triode 14 and the cathode of power supply connect, the emitter of the p-type triode 13 and institute
The anode connection for the power supply stated, is wound with wire 2 outside the annular core 1, one end of the wire 2 with it is described
P-type triode 13 collector connection, the other end of the wire 2 is connected with one first air switch 15, described
First air switch 15 is connect by a first resistor device 16 with baseline, first air switch 15 and first electricity
A second resistor 17 and the second air switch 18 are also parallel on resistance device 16, second air switch 18 and described
The switch state of first air switch 15 is exactly the opposite, the resistance of the relatively described first resistor device 16 of the second resistor 17
Value is big.
The both ends of the firm banking 7 are provided with screw mounting hole 9, and the screw mounting hole 9 is for installing one
The firm banking 7 is fixed in a plane by screw 8 by the screw 8.
Zero degree adjusting knob 5 and full scale adjusting knob 6 are provided on the support base 4.
The top of the annular core 1 is additionally provided with a parameter nameplate, described has automatic short-circuit function for showing
The parameters of the current sensor of energy.
The both ends of the hall device 10 pass through the input port that a 3rd resistor device 12 accesses an amplifier 11 respectively.
One end of the wire 2 is connect with the emitter of the N-type triode 14.
When second air switch 18 is opened, first air switch 15 is closed, and second air is opened
When closing 18 closing, first air switch 15 is opened.
Working principle: in use, the output interface to be connected in parallel on to first air switch 15 and first first
On resistor 16, the first air switch 15 is opened, the second air switch 18 disconnects at this time, normal inspection electric current, and when in route
When electric current is excessive, first air switch 15 jumps disconnected, described the second air switch 18 closure, due to second electricity
It is big compared with the resistance value of the first resistor device 16 to hinder device 17, can protect current sensor and be not burned.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (7)
1. a kind of current sensor with automatic short circuit function, it is characterised in that: the electricity with automatic short circuit function
Flow sensor includes firm banking (7), support base (4) and annular core (1), and the support base (4) is fixedly connected on described
Firm banking (7) on, the annular core (1) has an input perforation, and the input is perforated for penetrating an electric current
Bus (3), the current bus bar have been passed through electric current on (3)；
The annular core (1) has an opening, is provided with a hall device (10) in the opening, the Hall device
The both ends of part (10) are respectively connected to the input port of an amplifier (11), and the output end of the amplifier (11) is respectively connected to
The base stage of one N-type triode (14) and p-type triode (13), the emitter and p-type triode of the N-type triode (14)
(13) collector connection, the collector of the N-type triode (14) and the cathode of power supply connect, the p-type triode
(13) emitter is connect with the anode of the power supply, is wound with wire (2) outside the annular core (1), described
One end of wire (2) is connect with the collector of the p-type triode (13), the other end connection of the wire (2)
There is one first air switch (15), first air switch (15) is connect by a first resistor device (16) with baseline, institute
The first air switch (15) for stating and a second resistor (17) and second empty is also parallel in the first resistor device (16)
The switch state of air cock (18), second air switch (18) and first air switch (15) is exactly the opposite,
The second resistor (17) is big compared with the resistance value of the first resistor device (16).
2. the current sensor according to claim 1 with automatic short circuit function, it is characterised in that: the fixation bottom
The both ends of seat (7) are provided with screw mounting hole (9), and the screw mounting hole (9) passes through institute for installing a screw (8)
The firm banking (7) is fixed in a plane by the screw (8) stated.
3. the current sensor according to claim 2 with automatic short circuit function, it is characterised in that: the support base
(4) zero degree adjusting knob (5) and full scale adjusting knob (6) are provided on.
4. the current sensor according to claim 3 with automatic short circuit function, it is characterised in that: the annular iron
A parameter nameplate is additionally provided at the top of core (1), for showing each of the current sensor with automatic short circuit function
Item parameter.
5. the current sensor according to claim 1 with automatic short circuit function, it is characterised in that: the Hall device
The both ends of part (10) pass through the input port of a 3rd resistor device (12) access one amplifier (11) respectively.
6. the current sensor according to claim 1 with automatic short circuit function, it is characterised in that: the wire
(2) one end is connect with the emitter of the N-type triode (14).
7. the current sensor according to claim 1 with automatic short circuit function, it is characterised in that: described second is empty
When air cock (18) is opened, first air switch (15) is closed, described when second air switch (18) is closed
The first air switch (15) open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820800189.6U CN208902785U (en) | 2018-05-25 | 2018-05-25 | A kind of current sensor with automatic short circuit function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820800189.6U CN208902785U (en) | 2018-05-25 | 2018-05-25 | A kind of current sensor with automatic short circuit function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208902785U true CN208902785U (en) | 2019-05-24 |
Family
ID=66566240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820800189.6U Active CN208902785U (en) | 2018-05-25 | 2018-05-25 | A kind of current sensor with automatic short circuit function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208902785U (en) |
-
2018
- 2018-05-25 CN CN201820800189.6U patent/CN208902785U/en active Active
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