WO2014163318A1 - 다중 부스바용 간섭 보정식 일점감지 전류센서 - Google Patents
다중 부스바용 간섭 보정식 일점감지 전류센서 Download PDFInfo
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- WO2014163318A1 WO2014163318A1 PCT/KR2014/002529 KR2014002529W WO2014163318A1 WO 2014163318 A1 WO2014163318 A1 WO 2014163318A1 KR 2014002529 W KR2014002529 W KR 2014002529W WO 2014163318 A1 WO2014163318 A1 WO 2014163318A1
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- interference
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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
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/207—Constructional details independent of the type of device used
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
Definitions
- the present invention relates to a one-point sensing current sensor, and more particularly to an interference correction type one-point sensing current sensor for multiple busbars.
- Non-contact measurement of the amount of current in the distribution panel and switchboard there is a method using a current transformer and a magnetic sensor.
- a current transformer and a magnetic sensor In the method of using an annular core like a current transformer, an induction magnetic flux is formed in the core itself, and thus a magnitude of current is measured through the induced electromotive force. Since the induction magnetic flux is formed by circulating the core, there is relatively little interference with other power lines, but it requires a lot of installation space, and is vulnerable to mechanical deformation by vibration or mechanical shock, and insulation such as bus bar In non-environmental environments, safety issues arise between installation and control systems.
- the magnetic sensor method is a method of measuring a magnetic flux amount directly by placing a sensor capable of measuring magnetic flux, such as a Hall sensor, in the vicinity of the busbar and converting it into a magnitude of current (Patent application No. 10-2009- 0075419, Patent Application No. 10-2012-0028306).
- a sensor capable of measuring magnetic flux such as a Hall sensor
- the one-point sensing current sensor that acquires the current information flowing at one point of the wire or busbar by using the magnetic sensor has the advantage of easy installation of the equipment, but the sensor itself is affected by the environment such as temperature and distance. In an environment in which busbars connected to high-power loads are multi-dense, there is a problem in that interference between lines is severely generated and errors in measured values are severely generated.
- the present inventors have measured the amount of current in a plurality of busbar dense environments (multi-busbars), and have tried to develop a current sensor having improved measurement accuracy by removing interference generated between busbars while maintaining the advantages of the magnetic sensor method. .
- the present invention has been proposed to solve the above problems of the conventionally proposed methods, and includes a signal interference correction module that calculates the interference amount between the plurality of busbars to derive the correction current value from which the interference is removed, It is an object of the present invention to provide an interference corrected one-point sensing current sensor for multiple busbars, in which the interference between the two is removed and the accuracy of the current amount measurement is significantly improved.
- the present invention is configured so that the signal interference correction module includes an interference coefficient matrix generator, an interference coefficient derivation unit, and a correction current value calculation unit, thereby deriving a correction current value from which interference is simply removed according to the interference coefficient matrix and the calculation. It is another object of the present invention to provide an interference corrected one-point sensing current sensor for multiple busbars.
- the present invention is configured to generate and store a plurality of interference coefficient matrices for each distance between the temperature, the amount of current, and the measurement position and the busbar, to use the interference coefficient matrix suitable for the temperature, the amount of current and the distance.
- Another object of the present invention is to provide an interference corrected one-point sensing current sensor for multiple busbars, which minimizes an error caused by a variable.
- an interference correction type one-point detection current sensor for multiple busbars is installed in an insulating contact or adjacent to each of a plurality of busbars, and outputs the current flowing through the busbars by using a magnetic sensor.
- a plurality of magnetic sensor modules A signal collection module for collecting measurement signals output by the plurality of magnetic sensor modules; And a signal interference correction module that calculates an amount of interference between the plurality of busbars to a signal collected by the signal collection module to derive a correction current value from which the interference is removed.
- the magnetic sensor module the magnetic sensor is installed in the insulating contact or adjacent to the busbar to collect the magnetic force lines generated by the current flowing in the busbar; And a signal analysis circuit that analyzes a signal collected from the magnetic sensor and inverts current information flowing through the busbar.
- the signal interference correction module the interference coefficient matrix generator for generating an interference coefficient matrix;
- An interference coefficient derivation unit for deriving an interference coefficient for the corresponding busbar using the interference coefficient matrix or interpolation method;
- a correction current value calculator for deriving a correction current value using the derived interference coefficient.
- the signal interference correction module further includes an interference correction memory for storing an indirect coefficient matrix generated by the interference coefficient matrix generator and an interference correction equation for deriving a correction current value using the indirect coefficient.
- the interference coefficient deriving unit and the correction current value calculating unit may calculate a correction current value by reading a value required for interference correction of the measurement signal from the interference correction memory.
- a plurality of interference coefficient matrices may be generated per predetermined unit within a predetermined range of at least one variable selected from the group including temperature, current, and the distance between the measurement position and the busbar. Can be.
- the interference coefficient matrix may be generated by modeling according to the following equation.
- B magnetic flux density
- u 0 permeability in vacuum
- I current
- r distance from the conductor (distance from the busbar or adjacent busbar)
- dl loading in the current direction
- r ⁇ r direction
- the one-point sensing current sensor further comprises a temperature measuring module
- the interference coefficient matrix is generated and stored in a plurality of units per predetermined unit within a predetermined temperature range
- the signal interference correction module is the temperature measuring module
- the correction current value can be derived by using the interference coefficient matrix corresponding to the measured temperature.
- the one-point sensing current sensor calculates a measurement error correction value for each sensor by calculating an environment variable including a temperature, a distance from a busbar, and a magnetic flux intensity, to the measurement signal output by the magnetic sensor module.
- the apparatus may further include a measurement error correction module, and the signal interference correction module may derive the correction current value based on the measurement error correction value derived from the measurement error correction module.
- the interference between lines is included by including a signal interference correction module that calculates the amount of interference between a plurality of busbars and derives a correction current value from which interference is removed. This is eliminated and the accuracy of the current amount measurement is significantly improved.
- the signal interference correction module is configured to include an interference coefficient matrix generator, an interference coefficient derivation unit, and a correction current value calculation unit, thereby deriving a correction current value from which interference is simply removed according to the interference coefficient matrix and the calculation. can do.
- the present invention by generating and storing a plurality of interference coefficient matrix for each distance between the temperature, the current amount and the measurement position and the busbar to use a suitable interference coefficient matrix according to the temperature and the current amount and distance, The occurrence of errors due to variables can be minimized.
- FIG. 1 is a diagram illustrating the configuration of an interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating a process of measuring current through an interference correction type one-point sensing current sensor for multiple busbars according to one embodiment of the present invention
- FIG. 3 is a diagram illustrating a current measurement method of a magnetic sensor module in an interference correction type one-point sensing current sensor for multiple busbars according to an embodiment of the present invention.
- FIG. 4 is a diagram illustrating a case where interference occurs due to a current flowing in a busbar adjacent to one busbar in an interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention.
- FIG. 5 is a diagram illustrating a specific configuration of a signal interference correction module in an interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating a structural diagram for modeling an interference equation in an interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention
- FIG. 7 is a diagram illustrating a configuration of an interference correction type one-point sensing current sensor for multiple busbars according to another embodiment of the present invention.
- an interference correction type one-point detection current sensor for multiple busbars includes a magnetic sensor module 100, a signal collection module 200, and a signal interference correction module 300. It can be configured to include. More specifically, the interference correction type one-point sensing current sensor for multiple busbars according to an embodiment of the present invention, as shown in FIG. 2, has N magnetic sensor modules installed adjacent to N busbars 10, respectively.
- the 100 measures the amount of current I 0 , I 1 , ..., I n , ..., I N at each position, and the signal collection module 200 collects the measured amount of current (measurement signal) to correct the signal interference correction module. And a correction current value I ' 0 , I' 1 , ..., I ' n , ..., I' N from which the interference is removed by calculating the amount of interference between the busbars in the signal interference correction module 300. ) Can be derived.
- each configuration of the one-point sensing current sensor proposed by the present invention will be described in detail.
- the magnetic sensor module 100 may be provided at each of the plurality of busbars 10 in an insulating contact or adjacent to each other, and may measure and output a current flowing through the busbars 10 with a magnetic sensor. Since each bus bar is installed, the number of the magnetic sensor module 100 and the bus bar 10 may be the same. The magnetic sensor module 100 may play a role of converting a magnetic force line generated by a current flowing through the multiple busbars 10 into an electrical signal.
- 3 is a diagram illustrating a current measuring method of a magnetic sensor module in an interference correction type one-point sensing current sensor for multiple busbars according to an embodiment of the present invention. As shown in FIG. 3, when a current flows through the busbar 10, a magnetic force line is formed by a right screw law, and the magnetic sensor module 100 converts the magnetic force line into an electrical signal to convert the current flowing through the busbar 10. It can be measured.
- the magnetic sensor module 100 is installed in the insulating contact or adjacent to the busbar 10, the magnetic sensor and the magnetic to collect the magnetic force lines generated by the current flowing in the busbar 10 It may be configured to include a signal analysis circuit for inverting the current information flowing through the busbar 10 by analyzing the signal collected from the sensor.
- the magnetic sensor may use a hall sensor, but is not limited thereto. Various sensors may be used.
- FIG. 4 is a diagram illustrating a case in which interference occurs due to a current flowing in a busbar adjacent to one busbar in an interference correction type one-point sensing current sensor for multiple busbars according to an exemplary embodiment of the present invention.
- the magnetic sensor module 101 mounted on the busbar 11 to measure the amount of current is actually applied. Not only the current flowing through the busbar 11, but also the influence of the magnetic field interfered by the current flowing in the adjacent busbar 12 is affected.
- the present inventors include the signal collection module 200 and the signal interference correction module 300, so that the interference coefficients modeled from the measured values measured by the respective busbars 10 or previously measured values. We propose to derive the corrected correction current value without interference by using.
- the signal collection module 200 may serve to collect measurement signals output from the plurality of magnetic sensor modules 100 and transmit them to the signal interference correction module 300.
- the signal interference correction module 300 may derive the correction current value from which the interference is removed by calculating the amount of interference between the plurality of busbars 10 with respect to the signals collected by the signal collection module 300.
- FIG. 5 is a diagram illustrating a specific configuration of a signal interference correction module in an interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention.
- the signal interference correction module 300 in the interference correction type one-point detection current sensor for multiple busbars according to an embodiment of the present invention the interference coefficient matrix generator 310, the interference coefficient derivation unit ( 320) and a correction current value calculator 330.
- the interference correction memory 340 may be further included.
- the interference coefficient matrix generator 310 may generate an interference coefficient matrix.
- the interference coefficient may be expressed as h n, m , which means an amount of interference of the current flowing in the n-th busbar 10 with the m-th busbar 10.
- FIG. 6 is a diagram illustrating a structural diagram for modeling an interference equation in an interference correction type one-point sensing current sensor for multiple busbars according to an exemplary embodiment of the present invention. As illustrated in FIG. 6, the amount of interference current measured by the n + 1 th magnetic sensor module 100 due to the current I ′ n flowing in the n th busbar 10 is h n, n + 1 * I ′. It can be represented by n .
- the current In measured at the n-th busbar 10 is actually the amount of current I'n flowing through the n-th busbar 10 and the currents I ' 0 , I' 1 , I 'flowing in the adjacent busbar 10.
- n-1 the amount of current interrupted from I'n + 1 h 0, n * I ' 0 + h 1, n * I' 1 + h 2, n * I ' 2 . It can be represented as
- the interference coefficient matrix H may be defined in a table by measuring the temperature and distance by experiment.
- I ' can be calculated by iteratively converging.
- h 00 , h 11 , h 22 , h NN is the ratio of the busbar 10 to be measured affecting itself, and may be 1. However, 1 may be 1 depending on variables such as temperature, current, distance, and the like. It may not.
- the above-described interference coefficient matrix may be derived mathematically according to the physical shape of the busbar 10 and the magnetic sensor module 100, or may be derived by measurement in an actual environment. In addition, it can be characterized according to environmental variables such as temperature, distance to busbars, magnetic flux strength, and the value in the unmeasured environment can be estimated through interpolation or the like.
- I 0 h 0,0 * I ' 0 + h 1,0 * I' 1 + h 2,0 * I ' 2 +... + h n, 0 * I ' n +... + h N, 0 * I ' N.
- I current measured by the magnetic sensor measurement module
- h n, m interference coefficient where the current flowing through the nth busbar interferes with the mth busbar
- I ' actual current
- n sequence number of the busbar to be measured
- I 0 h 1,0 * I ′ 1 . That is, when the actual current 1A flows in the first busbar 10, if the current of 0.1A is measured in the 0 busbar 10, the 0 busbar 10 is driven by the 1st busbar 10. 10% interference, and the interference coefficient h 1.0 is 0.1.
- the interference coefficient may vary depending on the temperature, the magnetic flux intensity (current amount), the distance between the measurement position and the busbar 10, and the like, the distance between the temperature, the current amount and the measurement position and the busbar 10 is preferable.
- a plurality of interference coefficient matrices may be generated for each predetermined unit within a predetermined range of at least one variable selected from a group including a.
- the generated plurality of interference coefficient matrices may be stored in the interference correction memory 340 or other separate memory.
- the interference coefficient can be measured according to the temperature and the magnetic flux intensity, respectively. Physically, the amount of interference is proportional to the amount of current, but this may vary depending on the arrangement of busbars and the degree of interference shielding. If necessary, the coefficients can be extracted using interpolation. Therefore, a plurality of H matrices may exist for temperature and current values.
- Inputs to select the actual coefficients are temperature and current strength.
- the temperature values measured using a temperature sensor or the like can be used to refer to the coefficient corresponding to the correct temperature value in the H matrix.
- the matrix value for the strength of the current may be selected based on the current I measured after the temperature value has been determined.
- the above experiment is measured for current bus 1A, 10A, 25A, and 50A for a busbar 10 having a 50A standard, and the temperature is -40 degrees, -20 degrees, 0 degrees, 20 degrees, 40 degrees. It is a case where a matrix is measured at 60 degrees and 80 degrees, and it is expressed as H (T, C) for convenience, and T is a temperature and C is an amount of current.
- the influence of the distance and the amount of current among these interference coefficients is a physical phenomenon, so mathematical modeling is possible. Since the magnetic flux density B is inversely proportional to the distance and proportional to the amount of current, the magnetic flux density B can be modeled through the distance of the busbar and the measured amount of current.
- the interference coefficient matrix may be generated by modeling according to the following equation.
- B magnetic flux density
- u 0 permeability in vacuum
- I current
- r distance from the conductor (distance from the busbar or adjacent busbar)
- dl loading in the current direction
- r ⁇ r direction
- each element h n, m of the H matrix can be viewed as a function of distance, current, shielding, temperature, etc., and measured by temperature, current, distance, or with the busbar 10 installed. Or by modeling.
- the interference coefficient deriving unit 320 may derive an interference coefficient for the corresponding busbar 10 by using an interference coefficient matrix or interpolation, and the correction current value calculator 330 uses the derived interference coefficient to correct the current.
- the value can be derived.
- the interference correction memory 340 may store an indirect coefficient matrix generated by the interference coefficient matrix generator and an interference correction equation for deriving a correction current value using the indirect coefficients.
- the correction current value calculator 330 may calculate a correction current value by reading a value necessary for interference correction of the measurement signal from the interference correction memory 340.
- the actual interference coefficient can obtain sufficient accuracy even by considering only interference with the second adjacent busbar. Therefore, it can also be expressed more simply, such as the following equation and matrix.
- I current measured by the magnetic sensor measurement module
- h n, m interference coefficient where the current flowing through the nth busbar interferes with the mth busbar
- I ' actual current
- n sequence number of the busbar to be measured
- the above example shows the interference cancellation of the sampled signal on the time axis. If the interference of the current is kept constant for a short time, the current I 'and I are converted into a complex number considering the phase and not calculated for each current sampling value. The total amount of computation can be reduced by calculating
- the interference correction type one-point sensing current sensor for multiple busbars may further include a temperature measuring module 400, and the interference coefficient matrix may be a predetermined temperature.
- the signal interference correction module 300 may derive a correction current value by using an interference coefficient matrix corresponding to the temperature measured by the temperature measuring module 400.
- the one-point sensing current sensor calculates an environment variable including temperature, distance from busbars, and magnetic flux intensity, to a measurement signal output by the magnetic sensor module, and derives a measurement error correction value for each sensor.
- the signal interference correction module 300 may further derive a correction current value based on the measurement error correction value 500 derived from the measurement error correction module. Since each magnetic sensor module 100 may have an error depending on environmental variables such as temperature, distance, and magnetic flux intensity, the environment of temperature, distance, and the like may be compared by comparing the measured current amount and the actual current amount measured in a single bus bar without interference.
- the measurement error correction variable by the variable can be derived. Such measurement error correction parameters may also be stored and used in a separate memory.
- Busbar 11 Busbar to measure
- interference coefficient matrix generator 320 interference coefficient derivation unit
- correction current value calculation unit 340 interference correction memory
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Claims (8)
- 일점감지 전류센서로서,복수 개의 부스바 각각에 절연 접촉 또는 인접하여 설치되어, 부스바에 흐르는 전류를 자기 센서로 계측하여 출력시키는 복수 개의 자기 센서 모듈;상기 복수 개의 자기 센서 모듈이 출력한 계측 신호를 수집하는 신호 수집 모듈; 및상기 신호 수집 모듈에서 수집된 신호에, 상기 복수 개의 부스바 상호 간의 간섭량을 연산하여, 간섭이 제거된 보정 전류 값을 도출하는 신호 간섭 보정 모듈을 포함하는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제1항에 있어서, 상기 자기 센서 모듈은,상기 부스바에 절연 접촉 또는 인접하여 설치되어 상기 부스바에 흐르는 전류에 의해 발생되는 자기력선을 수집하는 자기 센서; 및상기 자기 센서로부터 수집되는 신호를 해석하여 상기 부스바에 흐르는 전류 정보를 역산하는 신호 해석 회로를 포함하여 구성되는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제1항에 있어서, 신호 간섭 보정 모듈은,간섭 계수 행렬을 생성하는 간섭 계수 행렬 생성부;상기 간섭 계수 행렬 또는 보간법을 이용하여 해당 부스바에 대한 간섭 계수를 도출하는 간섭 계수 도출부; 및상기 도출된 해당 간섭 계수를 이용하여 보정 전류 값을 도출하는 보정 전류 값 연산부를 포함하여 구성되는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제3항에 있어서, 상기 신호 간섭 보정 모듈은,상기 간섭 계수 행렬 생성부에서 생성된 간접 계수 행렬 및 상기 간접 계수를 이용하여 보정 전류 값을 도출하는 간섭 보정 방정식을 저장하는 간섭 보정 메모리를 더 포함하고,상기 간섭 계수 도출부 및 상기 보정 전류 값 연산부는,상기 간섭 보정 메모리로부터 상기 계측 신호의 간섭 보정에 필요한 값을 읽어들여 보정 전류 값을 연산하는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제3항에 있어서, 상기 간섭 계수 행렬은,온도, 전류, 및 측정 위치와 상기 부스바 사이의 거리를 포함하는 군에서 선택된 적어도 하나 이상의 변수의 미리 정해진 범위 내에서 미리 정해진 단위별로 복수 개가 생성되는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제1항에 있어서,상기 일점감지 전류센서는 온도 측정 모듈을 더 포함하고,간섭 계수 행렬은 미리 정해진 온도 범위 내에서 미리 정해진 단위별로 복수 개가 생성 및 저장되며, 상기 신호 간섭 보정 모듈은 상기 온도 측정 모듈을 통해 측정된 온도에 부합되는 간섭 계수 행렬을 이용하여 보정 전류 값을 도출하는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
- 제1항에 있어서, 상기 일점감지 전류센서는,상기 자기 센서 모듈이 출력한 계측 신호에, 온도, 부스바와의 거리, 및 자속 세기를 포함하는 환경 변수를 연산하여, 센서별로 측정 오차 보정 값을 도출하는 측정 오차 보정 모듈을 더 포함하고,상기 신호 간섭 보정 모듈은, 상기 측정 오차 보정 모듈에서 도출된 측정 오차 보정 값을 기초로 상기 보정 전류 값을 도출하는 것을 특징으로 하는, 다중 부스바용 간섭 보정식 일점감지 전류센서.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14780184.9A EP2982994B1 (en) | 2013-04-04 | 2014-03-25 | Interference compensating single point detecting current sensor for a multiplex busbar |
CA2895974A CA2895974A1 (en) | 2013-04-04 | 2014-03-25 | Interference compensating single point detecting current sensor for a multiplex busbar |
CN201480003363.9A CN104854461B (zh) | 2013-04-04 | 2014-03-25 | 多重汇流条用干扰校正方式单点检测电流传感器 |
JP2016506226A JP6399415B2 (ja) | 2013-04-04 | 2014-03-25 | 多重バスバー用干渉補正式一点検出電流センサー |
AU2014250331A AU2014250331A1 (en) | 2013-04-04 | 2014-03-25 | Interference compensating single point detecting current sensor for a multiplex busbar |
US14/404,256 US9494621B2 (en) | 2013-04-04 | 2014-03-25 | Interference compensating single point detecting current sensor for a multiplex busbar |
Applications Claiming Priority (2)
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EP (1) | EP2982994B1 (ko) |
JP (1) | JP6399415B2 (ko) |
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CN (1) | CN104854461B (ko) |
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US11940470B2 (en) | 2022-05-31 | 2024-03-26 | Allegro Microsystems, Llc | Current sensor system |
CN114966160B (zh) * | 2022-07-29 | 2022-10-25 | 浙江大学 | 一种基于隧道磁电阻的叠层母排及功率器件电流检测装置 |
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- 2014-03-25 AU AU2014250331A patent/AU2014250331A1/en not_active Abandoned
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CN104854461B (zh) | 2019-02-19 |
JP2016515707A (ja) | 2016-05-30 |
CA2895974A1 (en) | 2014-10-09 |
JP6399415B2 (ja) | 2018-10-03 |
EP2982994B1 (en) | 2021-03-10 |
AU2014250331A1 (en) | 2015-07-02 |
KR101297200B1 (ko) | 2013-08-29 |
EP2982994A4 (en) | 2016-11-30 |
US20160011239A1 (en) | 2016-01-14 |
EP2982994A1 (en) | 2016-02-10 |
US9494621B2 (en) | 2016-11-15 |
CN104854461A (zh) | 2015-08-19 |
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