CN108896818A - A method of current detecting is realized using fuse - Google Patents
A method of current detecting is realized using fuse Download PDFInfo
- Publication number
- CN108896818A CN108896818A CN201810790725.3A CN201810790725A CN108896818A CN 108896818 A CN108896818 A CN 108896818A CN 201810790725 A CN201810790725 A CN 201810790725A CN 108896818 A CN108896818 A CN 108896818A
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- Prior art keywords
- fuse
- temperature
- impedance
- range
- real time
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/32—Compensating for temperature change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The present invention relates to power electronics fields, a kind of method for realizing current detecting using fuse are specifically disclosed, including inputting stable electric current i to fuse at normal temperature1, detect the voltage V of fuse1Establish impedance RfuseEquation calculates fuse impedance Rfuse, and storage of noting down；Temperature acquisition range is divided into multiple temperature ranges, calculates fuse in the weighted value of impedance R in different temperatures sectiont, and formulate the interpolation table in different temperatures section；Real-time measurement insures filament voltage VIn real time, obtain the weighted value of impedance R in corresponding interpolation tablet, and calculate the real-time current value i of circuit systemIn real time.The present invention calculates the electric current of circuit system, to save the device for detecting electric current, saves circuit space, and can also improve the current precision of detection by rejecting influence of the temperature to fuse impedance.
Description
Technical field
The present invention relates to power electronics fields, specifically disclose a kind of side that current detecting is realized using fuse
Method.
Background technique
In the common circuit system for having fuse, when electric current of detection system need using Hall current sensor, point
The devices such as device, resistance are flowed, both occupy circuit space in this way, and these devices are easy malfunction and failure, so as to cause electric current survey
Amount inaccuracy.Therefore, it is necessary to a kind of methods that can solve the above problem.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, fuse is utilized the purpose of the present invention is to provide a kind of
The method for realizing current detecting.
To achieve the above object, the present invention uses following scheme.
Stable electric current i is inputted to fuse at normal temperature1, detect the voltage V of fuse1, establish fuse under room temperature and hinder
Anti- RfuseEquation Rfuse=(V ÷ i), calculates fuse impedance Rfuse, and storage of noting down；
Temperature acquisition range is divided into multiple temperature ranges, calculates fuse in the weighted value of impedance in different temperatures section
Rt, and formulate the interpolation table in different temperatures section；
Real-time measurement insures filament voltage VIn real time, the weighted value of impedance R in corresponding interpolation table is obtained according to fuse temperaturet, and
According to VIn real time, RtAnd RfuseCalculate the real-time current value i of circuit systemIn real time, wherein iIn real time=VIn real time÷(Rfuse+Rt)。
Further, described that temperature acquisition range is divided into multiple temperature ranges, fuse is calculated in different temperatures section
Weighted value of impedance Rt, and the interpolation table in different temperatures section is formulated, including：
It puts fuse into thermostatic equipment, different temperature is set, and measure the impedance of fuse under different temperatures, formulate
Fuse impedance parameter table；
The temperature acquisition range (- x, y) of parameter list is divided into multiple temperature ranges by certain temperature siding-to-siding block length m, and
Calculate the weighted value of impedance R of each temperature rangetAnd RtCorresponding temperature value Tx, wherein Rt=(Rtmax+RtMin) 2 ÷,
RtMax indicates the maximum impedance of fuse in temperature range, RtMin indicates the smallest impedance of fuse in temperature range；Tx=
(Tmax+Tmin) 2 ÷, Tmax indicate highest temperature in temperature range, and Tmin indicates temperature minimum in temperature range；
According to the R of each temperature rangetAnd corresponding Tx formulates interpolation table.
Further, for the temperature range length m minimum with 0.1 DEG C for unit length, maximum is long as unit of 180 DEG C
Degree.
Further, interpolation number n=(x+y) the ÷ m in temperature acquisition range.
Beneficial effects of the present invention：A kind of method for realizing current detecting using fuse is provided, by utilizing fuse
Temperature characterisitic calculate the electric current of circuit system, to save the device for detecting electric current, save circuit space, and
The current precision of detection can also be improved.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
A method of current detecting is realized using fuse, including：A certain size is inputted to fuse at normal temperature
Stabling current i detects voltage V of the fuse when being passed through electric current i, establishes under room temperature fuse impedance R when being passed through electric current ifuse
Equation, Rfuse=V ÷ i calculates fuse impedance Rfuse, and storage of noting down.
Put fuse into thermostatic equipment, regulating thermostatic device temperature measures the impedance of fuse under different temperatures, formulates
Fuse impedance parameter table；The temperature acquisition range (- x, y) of parameter list is divided into multiple temperature by certain temperature siding-to-siding block length m
Section is spent, and calculates the weighted value of impedance R of each temperature rangetAnd RtCorresponding temperature value Tx, wherein Rt=(Rtmax+
RtMin) 2, R ÷tMax indicates the maximum impedance of fuse in temperature range, RtMin indicates that fuse is the smallest in temperature range
Impedance；Tx=(Tmax+Tmin) ÷ 2, Tmax indicate highest temperature in temperature range, and Tmin indicates minimum in temperature range
Temperature；According to the R of each temperature rangetAnd corresponding Tx formulates interpolation table.
Real-time measurement insures filament voltage VIn real time, according to fuse temperature, corresponding weighted value of impedance is obtained from interpolation table
Rt, and according to VIn real time, RtAnd RfuseThe real-time current value i of counting circuit systemIn real time, wherein iIn real time=VIn real time÷(Rfuse+Rt)。
The method for realizing current detecting using fuse through this embodiment, saves the device for detecting electric current, saves
Circuit space, is conducive to the miniaturization of equipment, while being additionally contemplates that fuse impedance at different temperatures can be changed
It influences, so that the real-time current value measured is more accurate.
In the present embodiment, temperature range length m minimum is with 0.1 DEG C for unit length, and maximum is with 180 DEG C for unit length.
M value size can be chosen according to the actual situation, and the interpolation number in temperature acquisition range is preferably n, wherein n=(x+y) ÷
m。
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (4)
1. a kind of method for realizing current detecting using fuse, which is characterized in that including：
Stable electric current i is inputted to fuse at normal temperature1, detect the voltage V of fuse1, establish fuse impedance under room temperature
RfuseEquation Rfuse=(V ÷ i), calculates fuse impedance Rfuse, and storage of noting down；
Temperature acquisition range is divided into multiple temperature ranges, calculates fuse in the weighted value of impedance R in different temperatures sectiont, and make
Determine the interpolation table in different temperatures section；
Real-time measurement insures filament voltage VIn real time, the weighted value of impedance R in corresponding interpolation table is obtained according to fuse temperaturet, and according to
VIn real time, RtAnd RfuseCalculate the real-time current value i of circuit systemIn real time, wherein iIn real time=VIn real time÷(Rfuse+Rt)。
2. it is according to claim 1 it is a kind of using fuse realize current detecting method, which is characterized in that it is described will be warm
It spends acquisition range and divides multiple temperature ranges, calculate fuse in the weighted value of impedance R in different temperatures sectiont, and formulate difference
The interpolation table of temperature range, including：
It puts fuse into thermostatic equipment, different temperature is set, and measure the impedance of fuse under different temperatures, formulate insurance
Silk impedance parameter table；
The temperature acquisition range (- x, y) of parameter list is divided into multiple temperature ranges by certain temperature siding-to-siding block length m, and is calculated
The weighted value of impedance R of each temperature rangetAnd RtCorresponding temperature value Tx, wherein Rt=(Rtmax+RtMin) 2, R ÷tMax table
The maximum impedance of fuse, R in temperature displaying function sectiontMin indicates the smallest impedance of fuse in temperature range；Tx=(Tmax+
Tmin) 2 ÷, Tmax indicate highest temperature in temperature range, and Tmin indicates temperature minimum in temperature range；
According to the R of each temperature rangetAnd corresponding Tx formulates interpolation table.
3. a kind of method for realizing current detecting using fuse according to claim 2, which is characterized in that the temperature
Siding-to-siding block length m minimum is with 0.1 DEG C for unit length, and maximum is with 180 DEG C for unit length.
4. a kind of method for realizing current detecting using fuse according to claim 2, which is characterized in that temperature acquisition
Interpolation number n=(x+y) ÷ m in range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790725.3A CN108896818A (en) | 2018-07-18 | 2018-07-18 | A method of current detecting is realized using fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790725.3A CN108896818A (en) | 2018-07-18 | 2018-07-18 | A method of current detecting is realized using fuse |
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| Publication Number | Publication Date |
|---|---|
| CN108896818A true CN108896818A (en) | 2018-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810790725.3A Pending CN108896818A (en) | 2018-07-18 | 2018-07-18 | A method of current detecting is realized using fuse |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329295A (en) * | 2007-06-22 | 2008-12-24 | 中芯国际集成电路制造(上海)有限公司 | Method for measuring resistance temperature coefficient |
| CN103558445A (en) * | 2013-11-13 | 2014-02-05 | 丹纳赫（上海）工业仪器技术研发有限公司 | Current detection circuit and measuring device |
| CN105868439A (en) * | 2016-03-22 | 2016-08-17 | 深圳市赛尔美电子科技有限公司 | Resistance wire resistance value fitting method |
| CN205786956U (en) * | 2016-06-21 | 2016-12-07 | 浙江方圆电气设备检测有限公司 | A kind of fuse transient current circulation test device used for electric vehicle |
| WO2017078884A1 (en) * | 2015-07-20 | 2017-05-11 | Cooper Technologies Company | Electric fuse current sensing systems and monitoring methods |
-
2018
- 2018-07-18 CN CN201810790725.3A patent/CN108896818A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329295A (en) * | 2007-06-22 | 2008-12-24 | 中芯国际集成电路制造(上海)有限公司 | Method for measuring resistance temperature coefficient |
| CN103558445A (en) * | 2013-11-13 | 2014-02-05 | 丹纳赫（上海）工业仪器技术研发有限公司 | Current detection circuit and measuring device |
| WO2017078884A1 (en) * | 2015-07-20 | 2017-05-11 | Cooper Technologies Company | Electric fuse current sensing systems and monitoring methods |
| CN105868439A (en) * | 2016-03-22 | 2016-08-17 | 深圳市赛尔美电子科技有限公司 | Resistance wire resistance value fitting method |
| CN205786956U (en) * | 2016-06-21 | 2016-12-07 | 浙江方圆电气设备检测有限公司 | A kind of fuse transient current circulation test device used for electric vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 石颉等: "熔断器老化状态多因子检测系统", 《电子技术应用》 * |
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Application publication date: 20181127 |