WO2016002217A1 - Dispositif et procédé de détection de courant - Google Patents

Dispositif et procédé de détection de courant Download PDF

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Publication number
WO2016002217A1
WO2016002217A1 PCT/JP2015/003302 JP2015003302W WO2016002217A1 WO 2016002217 A1 WO2016002217 A1 WO 2016002217A1 JP 2015003302 W JP2015003302 W JP 2015003302W WO 2016002217 A1 WO2016002217 A1 WO 2016002217A1
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WO
WIPO (PCT)
Prior art keywords
current
detection
frequency
aliasing
unit
Prior art date
Application number
PCT/JP2015/003302
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English (en)
Japanese (ja)
Inventor
生島　剛
英司 岩見
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2016002217A1 publication Critical patent/WO2016002217A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • 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
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • 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

Definitions

  • the present invention generally relates to a current detection device and a current detection method, and more specifically, relates to a current detection device and a current detection method for detecting a current to be measured flowing through a conducting wire.
  • the determination unit 14 determines whether or not the current to be measured flowing through the conductor 40 is detected (leakage determination) based on the DC detection signal output from the detection circuit 102. When aliasing is not detected, the determination unit 14 performs the above determination based on a DC detection signal that is not affected by aliasing. Further, when aliasing is detected, switching from one frequency affected by aliasing to another frequency is performed. For this reason, the DC detection signal output from the detection circuit 102 after the frequency is switched is a signal in which the influence of aliasing is reduced. Therefore, when aliasing is detected, the determination unit 14 can make the above determination based on the DC detection signal in which the influence of aliasing is reduced by switching the frequency.
  • the current detection device 10 can reduce the possibility of erroneously detecting the AC component generated by aliasing as the current to be measured.
  • the sampling unit 130a samples the AC detection signal output from the second detection unit 12 with the sampling clock CL2 output from the clock generation unit 100.
  • the sampling unit 130 a outputs the sampling result to the first detection unit 11.
  • the aliasing detection unit 13 obtains a voltage signal having a frequency component twice the frequency of the reference clock CL1 by the sampling unit 130a. That is, the removal unit 103 removes a voltage signal having a frequency component twice the frequency of the reference clock CL1 from the direct current detection signal, thereby obtaining a direct current detection signal in which the influence of aliasing is reduced.
  • the sampling unit 130a samples the AC detection signal output from the second detection unit 12 with the sampling clock CL2 having a frequency twice the set frequency fa (step S115).
  • the current detection device 10 of the present embodiment does not require switching of the frequency of the reference clock when aliasing is detected, so that the detection time can be shortened.
  • the current detection device 10 according to the present embodiment will be described focusing on differences from the third embodiment.
  • the basic configuration of the current detection device 10 of the present embodiment is the same as that of the third embodiment, and the same components as those of the third embodiment are denoted by the same reference numerals and description thereof is omitted as appropriate.
  • the first detection unit 11 of the present embodiment includes a clock generation unit 100, a conversion circuit 101, a detection circuit 102, a removal unit 103, and a timing control unit 104.
  • the timing control unit 104 controls the timing at which the clock generation unit 100 outputs the sampling clock. Specifically, the timing control unit 104 shifts the timing at which the clock generation unit 100 outputs the sampling clock by a phase difference between current waveforms detected by the first detection unit 11 and the aliasing detection unit 13. The clock generation unit 100 is controlled.
  • the sampling unit 130a of the aliasing detection unit 13 outputs the sampling result in which the phase difference from the DC detection signal is adjusted to the first detection unit 11.
  • the first detection unit 11 removes the high-frequency component voltage signal, which is the sampling result, from the DC detection signal. That is, as in the second embodiment, the aliasing detector 13 of the present embodiment controls the first detector 11 so as to reduce the influence of aliasing by outputting a voltage signal of a high frequency component that is a sampling result.
  • the filter unit 105 is added to the first detection unit 11 of the first embodiment, but the first detection unit 11 of the second embodiment may be used. In this case, as shown in FIG. 12, the filter unit 105 is disposed between the conversion circuit 101 and the detection circuit 102. Further, the filter unit 105 is not limited to the first and second embodiments, and is disposed in the first detection unit 11 of any of the third to fifth embodiments between the conversion circuit 101 and the detection circuit 102. Also good.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

　L'invention concerne un dispositif de détection de courant, avec lequel il est possible de détecter l'occurrence de repliement. Ce dispositif de détection de courant (10) est pourvu d'une première unité de détection (11), d'une seconde unité de détection (12) et d'une unité de détection de repliement(13). La première unité de détection (11) utilise un courant d'excitation d'une fréquence prescrite pour détecter un courant mesuré. La seconde unité de détection (12) sort la composante de courant alternatif du courant mesuré sous la forme d'un signal de détection de courant alternatif. L'unité de détection de repliement (13) échantillonne le signal de détection de courant alternatif, au niveau d'une horloge d'échantillonnage ayant une fréquence obtenue en multipliant la fréquence prescrite par un nombre pair.
PCT/JP2015/003302 2014-07-04 2015-07-01 Dispositif et procédé de détection de courant WO2016002217A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014138774A JP2017150817A (ja) 2014-07-04 2014-07-04 電流検出装置および電流検出方法
JP2014-138774 2014-07-04

Publications (1)

Publication Number Publication Date
WO2016002217A1 true WO2016002217A1 (fr) 2016-01-07

Family

ID=55018790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/003302 WO2016002217A1 (fr) 2014-07-04 2015-07-01 Dispositif et procédé de détection de courant

Country Status (2)

Country Link
JP (1) JP2017150817A (fr)
WO (1) WO2016002217A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106405189A (zh) * 2016-08-14 2017-02-15 河北工业大学 一种具有温度稳定性的电流传感器及其测量方法
CN107656120A (zh) * 2017-10-20 2018-02-02 吉林大学 一种新型高精度低噪声直流大电流检测装置及方法
CN112737448A (zh) * 2020-12-29 2021-04-30 联合汽车电子有限公司 车用电机控制系统及控制方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0658377U (ja) * 1993-01-27 1994-08-12 横河電機株式会社 サンプリング式測定器
WO2008026276A1 (fr) * 2006-08-31 2008-03-06 Mitsubishi Electric Corporation Appareil de détection à courant à phase nulle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0658377U (ja) * 1993-01-27 1994-08-12 横河電機株式会社 サンプリング式測定器
WO2008026276A1 (fr) * 2006-08-31 2008-03-06 Mitsubishi Electric Corporation Appareil de détection à courant à phase nulle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106405189A (zh) * 2016-08-14 2017-02-15 河北工业大学 一种具有温度稳定性的电流传感器及其测量方法
CN107656120A (zh) * 2017-10-20 2018-02-02 吉林大学 一种新型高精度低噪声直流大电流检测装置及方法
CN107656120B (zh) * 2017-10-20 2020-01-07 吉林大学 一种高精度低噪声直流大电流检测装置及方法
CN112737448A (zh) * 2020-12-29 2021-04-30 联合汽车电子有限公司 车用电机控制系统及控制方法
CN112737448B (zh) * 2020-12-29 2023-03-03 联合汽车电子有限公司 车用电机控制系统及控制方法

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