CN207081759U - A kind of electronic circuit breaker of electronic circuit breaker current sampling circuit and the application circuit - Google Patents
A kind of electronic circuit breaker of electronic circuit breaker current sampling circuit and the application circuit Download PDFInfo
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- CN207081759U CN207081759U CN201720897804.5U CN201720897804U CN207081759U CN 207081759 U CN207081759 U CN 207081759U CN 201720897804 U CN201720897804 U CN 201720897804U CN 207081759 U CN207081759 U CN 207081759U
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Abstract
The utility model discloses the electronic circuit breaker of a kind of electronic circuit breaker current sampling circuit and the application circuit, and the electronic circuit breaker current sampling circuit includes measurement resistance R1, battery positive voltage incoming end VCC, measurement resistance R2, the single-chip microcomputer incoming end Vout of electronic circuit breaker, sampling resistor Rc, operational amplifier U1, measurement resistance R3, electronic circuit breaker control terminal MG, measurement resistance R4 and power supply end+V.The utility model can be connected on electromobile battery positive terminal, be measured at positive terminal high voltage, obtain the loop current of positive terminal, avoid the occurrence of that positive pole is long-term powered and causes short circuit to burn car.The utility model makes electronic circuit breaker not only to be protected in negative loop to electric car, and electric car can be protected in positive pole loop, improves the grade of protection of the electronic circuit breaker to electric car, makes electric car more safe and reliable.The utility model is simple in construction, and cost is low, suitable popularization and application.
Description
Technical field
It the utility model is related to electronic circuit breaker field, more particularly to a kind of electronic circuit breaker current sampling circuit and application
The electronic circuit breaker of the circuit.
Background technology
In order that the energized circuit of electric car is more safe and reliable, electronic circuit breaker is applied and given birth to, and it substitutes pure machine now
The breaker of tool structure, greatly reduce the possibility of electric car spontaneous combustion.Electronic circuit breaker needs the electricity in acquisition circuit when working
Stream, current sampling circuit traditional at present are divided into two kinds：First, collection is connected on the sampling resistor on electromobile battery negative pole end
Voltage calculates electric current, as shown in figure 1, R is sampling resistor, UInputSampling resistor input terminal voltage, UOutputExported for sampling resistor
Terminal voltage, just must be it is to be understood that sampling resistor both end voltage can just be drawn i.e. because to gather the electric current by sampling resistor
(UInput-UOutput)/R, if sampling resistor is placed on positive terminal, due to being detection input voltage, UInputOr UOutputOnly know first,
The electric current for flowing through sampling resistor can not then be calculated, if being placed on negative pole, UOutput=0, so need to only test into terminal voltage UInput
Calculate the electric current for flowing through sampling resistor.If however, only protected in negative pole, positive pole it is long-term it is powered still have that short circuit burns car can
Energy；2nd, electric current is gathered using current transformer mode, as shown in Fig. 2 L is current transformer, VCC battery positive voltage incoming ends,
IReturnThe positive terminal loop current gathered for current transformer, although the positive terminal loop current which can be surveyed, its cost
Height, in electric car sector application, cost performance is relatively low, can not popularization and application.
Utility model content
The purpose of this utility model is the electronics by a kind of electronic circuit breaker current sampling circuit and the application circuit
Breaker, to solve the problems, such as that background section above is mentioned.
To use following technical scheme up to this purpose, the utility model：
A kind of electronic circuit breaker current sampling circuit, it includes measuring resistance R1, battery positive voltage incoming end VCC, measurement
Resistance R2, the single-chip microcomputer incoming end Vout of electronic circuit breaker, sampling resistor Rc, operational amplifier U1, measurement resistance R3, electronics break
Road device control terminal MG, measurement resistance R4 and power supply end+V；One end connection electronic circuit breaker control of the sampling resistor Rc
End MG processed, measurement resistance R1 one end, sampling resistor the Rc other end and battery positive voltage incoming end VCC, resistance R3 one end
Connection, the measurement resistance R1 other end is with measuring resistance R2 one end, operational amplifier U1 reverse input ends are connected, electronic broken circuit
Device control terminal MG connection electromobile batteries, the measurement resistance R2 other end and operational amplifier U1 output end, electronic broken circuit
The single-chip microcomputer incoming end Vout connections of device, resistance R3 other end connection measurement resistance R4 one end, operational amplifier U1 it is same
To input, the measurement resistance R4 other end is grounded with operational amplifier U1 negative pole end, operational amplifier U1 positive pole termination
Power supply end+V.
The invention also discloses a kind of electronic circuit breaker, and it includes electronic circuit breaker current sampling circuit, the electricity
Sub- circuit breaker current sample circuit includes measurement resistance R1, battery positive voltage incoming end VCC, measurement resistance R2, electronic circuit breaker
Single-chip microcomputer incoming end Vout, sampling resistor Rc, operational amplifier U1, measurement resistance R3, electronic circuit breaker control terminal MG, measurement
Resistance R4 and power supply end+V；One end connection electronic circuit breaker control terminal MG, the measurement resistance R1 of the sampling resistor Rc
One end, the sampling resistor Rc other end is connected with battery positive voltage incoming end VCC, resistance R3 one end, measurement resistance R1's
The other end is with measuring resistance R2 one end, operational amplifier U1 reverse input ends are connected, electronic circuit breaker control terminal MG connections electricity
Motor-car battery, the measurement resistance R2 other end and operational amplifier U1 output end, the single-chip microcomputer incoming end of electronic circuit breaker
Vout connections, resistance R3 other end connection measurement resistance R4 one end, operational amplifier U1 input in the same direction, measure resistance
The R4 other end is grounded with operational amplifier U1 negative pole end, operational amplifier U1 positive pole termination power supply end+V.
The utility model proposes electronic circuit breaker current sampling circuit and application the circuit electronic circuit breaker can connect
In electromobile battery positive terminal, measured at positive terminal high voltage, obtain the loop current of positive terminal, avoid positive pole from growing
Phase is powered and causes short-circuit the occurrence of burning car.The utility model makes electronic circuit breaker not only can be in negative loop to electronic
Car is protected, and electric car can be protected in positive pole loop, improves protection of the electronic circuit breaker to electric car
Grade, make electric car more safe and reliable.The utility model is simple in construction, and cost is low, suitable popularization and application.
Brief description of the drawings
Fig. 1 is the cathodal current sample circuit schematic diagram of conditional electronic breaker；
Fig. 2 is the circuit diagram that electric current is gathered using current transformer mode；
Fig. 3 is the electronic circuit breaker current sampling circuit structure chart that the utility model embodiment provides.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can come in fact in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
Open the more thorough and comprehensive of content understanding.It should be noted that when an element is considered as " connection " another element, it can
To be directly to another element or may be simultaneously present centering elements.Unless otherwise defined, institute used herein
Some technologies and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model are generally understood that.Herein
In term used in the description of the present utility model be intended merely to describe specific embodiment purpose, it is not intended that in
Limit the utility model.Term as used herein " and/or " include the arbitrary of one or more related Listed Items and
All combinations.
It refer to shown in Fig. 3, Fig. 3 is the electronic circuit breaker current sampling circuit structure that the utility model embodiment provides
Figure.In the present embodiment electronic circuit breaker current sampling circuit 100 specifically include measurement resistance R1, battery positive voltage incoming end VCC,
Measure resistance R2, the single-chip microcomputer incoming end Vout of electronic circuit breaker, sampling resistor Rc, operational amplifier U1, measurement resistance R3, electricity
Sub- breaker control end MG, measurement resistance R4 and power supply end+V；One end connection electronic broken circuit of the sampling resistor Rc
Device control terminal MG, measurement resistance R1 one end, the sampling resistor Rc other end and battery positive voltage incoming end VCC, resistance R3
One end connects, and the measurement resistance R1 other end is with measuring resistance R2 one end, operational amplifier U1 reverse input ends are connected, electronics
Breaker control end MG connection electromobile batteries, the measurement resistance R2 other end and operational amplifier U1 output end, electronics
The single-chip microcomputer incoming end Vout connections of breaker, resistance R3 other end connection measurement resistance R4 one end, operational amplifier U1
Input in the same direction, the measurement resistance R4 other end is grounded with operational amplifier U1 negative pole end, operational amplifier U1 positive pole
Terminate power supply end+V.
In the specific implementation, the electronic circuit breaker control terminal MG is connected with the grid of metal-oxide-semiconductor in electronic circuit breaker.It is described
The single-chip microcomputer incoming end Vout of electronic circuit breaker is connected with the single-chip microcomputer in electronic circuit breaker, and single-chip microcomputer performs electronic circuit breaker
Associated control duty.The measurement resistance R1 is identical with the resistance for measuring resistance R3 in the present embodiment, the measurement resistance R2
It is identical with the resistance for measuring resistance R4, the voltage V of the operational amplifier U1 output endsOutputThere can be connected single-chip microcomputer
Direct read-out voltage value size, therefore, the voltage at the sampling resistor Rc both endsFlow through the sampling resistor Rc
Electric current be the extreme loop current I=U/R of accumulator positive, wherein, R be sampling resistor Rc resistance value.
The present embodiment also discloses a kind of electronic circuit breaker, and it includes above-mentioned electronic circuit breaker current sampling circuit 100, adopts
With the loop current of above-mentioned electronic circuit breaker current sampling circuit 100 collection electromobile battery positive pole.
The technical solution of the utility model can be connected on electromobile battery positive terminal, be surveyed at positive terminal high voltage
Amount, the loop current of positive terminal is obtained, avoid the occurrence of that positive pole is long-term powered and causes short circuit to burn car.The utility model makes
Electronic circuit breaker can not only be protected in negative loop to electric car, and electric car can be protected in positive pole loop
Shield, improves the grade of protection of the electronic circuit breaker to electric car, makes electric car more safe and reliable.The letter of the utility model structure
Single, cost is low, suitable popularization and application.
Pay attention to, above are only preferred embodiment of the present utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carried out for a person skilled in the art various bright
Aobvious change, readjust and substitute without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (2)
1. a kind of electronic circuit breaker current sampling circuit, it is characterised in that including measurement resistance R1, battery positive voltage incoming end
VCC, measurement resistance R2, the single-chip microcomputer incoming end Vout of electronic circuit breaker, sampling resistor Rc, operational amplifier U1, measurement resistance
R3, electronic circuit breaker control terminal MG, measurement resistance R4 and power supply end+V；One end connection electronics of the sampling resistor Rc
Breaker control end MG, measurement resistance R1 one end, sampling resistor the Rc other end and battery positive voltage incoming end VCC, resistance
R3 one end connection, the measurement resistance R1 other end is with measuring resistance R2 one end, operational amplifier U1 reverse input ends are connected,
Electronic circuit breaker control terminal MG connection electromobile batteries, the measurement resistance R2 other end and operational amplifier U1 output end,
The single-chip microcomputer incoming end Vout connections of electronic circuit breaker, resistance R3 other end connection measurement resistance R4 one end, operation amplifier
Device U1 input in the same direction, the measurement resistance R4 other end are grounded with operational amplifier U1 negative pole end, operational amplifier U1's
Positive pole termination power supply end+V.
2. a kind of electronic circuit breaker, it is characterised in that the electronic circuit breaker includes the electronic circuit breaker electric current described in claim 1
Sample circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897804.5U CN207081759U (en) | 2017-07-21 | 2017-07-21 | A kind of electronic circuit breaker of electronic circuit breaker current sampling circuit and the application circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897804.5U CN207081759U (en) | 2017-07-21 | 2017-07-21 | A kind of electronic circuit breaker of electronic circuit breaker current sampling circuit and the application circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207081759U true CN207081759U (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720897804.5U Active CN207081759U (en) | 2017-07-21 | 2017-07-21 | A kind of electronic circuit breaker of electronic circuit breaker current sampling circuit and the application circuit |
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| CN (1) | CN207081759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108924A (en) * | 2019-05-30 | 2019-08-09 | 上海良信电器股份有限公司 | DC current measuring circuit, method and the breaker of breaker |
-
2017
- 2017-07-21 CN CN201720897804.5U patent/CN207081759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108924A (en) * | 2019-05-30 | 2019-08-09 | 上海良信电器股份有限公司 | DC current measuring circuit, method and the breaker of breaker |
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