WO2023112438A1 - Résistance shunt et dispositif de détection de courant - Google Patents

Résistance shunt et dispositif de détection de courant Download PDF

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Publication number
WO2023112438A1
WO2023112438A1 PCT/JP2022/037221 JP2022037221W WO2023112438A1 WO 2023112438 A1 WO2023112438 A1 WO 2023112438A1 JP 2022037221 W JP2022037221 W JP 2022037221W WO 2023112438 A1 WO2023112438 A1 WO 2023112438A1
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WO
WIPO (PCT)
Prior art keywords
voltage
shunt resistor
detection section
resistor
voltage detection
Prior art date
Application number
PCT/JP2022/037221
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English (en)
Japanese (ja)
Inventor
正樹 北川
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Koa株式会社
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Filing date
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Application filed by Koa株式会社 filed Critical Koa株式会社
Publication of WO2023112438A1 publication Critical patent/WO2023112438A1/fr

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/144—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals or tapping points being welded or soldered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids

Definitions

  • the present invention relates to shunt resistors and current detection devices.
  • Shunt resistors are widely used for current sensing applications.
  • Such a shunt resistor comprises a resistor and electrodes joined across the resistor.
  • resistors are made of resistance alloys such as copper-nickel alloys, copper-manganese alloys, iron-chromium alloys, and nickel-chromium alloys
  • electrodes are made of highly conductive metals such as copper. It is configured.
  • a voltage detection section is provided on the electrode, and the voltage generated at both ends of the resistor is detected by connecting a conducting wire (for example, an aluminum wire) to the voltage detection section.
  • the temperature coefficient of resistance (TCR) characteristics are important in order to enable current detection under conditions where the influence of temperature fluctuations is small.
  • the temperature coefficient of resistance is an index that indicates the rate of change in resistance value due to temperature, and the smaller the absolute value, the smaller the change in resistance value.
  • an object of the present invention is to provide a shunt resistor and a current detection device capable of reducing the absolute value of the temperature coefficient of resistance.
  • a shunt resistor used for current sensing comprises a resistor and a pair of electrodes connected across the resistor in a first direction.
  • the shunt resistor has a first protrusion formed on a first side surface of the shunt resistor parallel to the first direction, and the shunt resistor a surface opposite to the first side surface.
  • a second protrusion formed on a second side surface of the second protrusion, the first protrusion having a portion of the resistor and a portion of the pair of electrodes;
  • the projecting portion has a portion of the resistor and a portion of the pair of electrodes.
  • the first protrusion includes a first voltage detection section and a second voltage detection section connected to both ends of the resistor in the first direction
  • the second protrusion includes the It has a third voltage detection section and a fourth voltage detection section connected to both ends of the resistor in the first direction
  • the first voltage detection section and the third voltage detection section are arranged on the same electrode.
  • the second voltage detection section and the fourth voltage detection section are arranged on the same electrode.
  • the first protrusion has a first corner and a second corner connected to the pair of electrodes
  • the second protrusion has a second corner connected to the pair of electrodes.
  • the shunt resistor has a first recess formed in the first side surface and a second recess formed in the second side surface, and the first protrusion is formed in the It is arranged in the first recess, and the second protrusion is arranged in the second recess.
  • a current detection device in one aspect, includes the shunt resistor and a current detection circuit board having a voltage signal wiring that transmits a voltage signal from the shunt resistor.
  • the voltage signal wiring is electrically connected to the first voltage detection section and the second voltage detection section of the first protrusion, and the third voltage detection section and the fourth voltage detection section of the second protrusion. ing.
  • the current detection circuit board further includes a voltage terminal pad, and the voltage terminal pad comprises the first voltage detection section, the second voltage detection section, the third voltage detection section, It is connected to the fourth voltage detection section and the voltage signal wiring.
  • the current detection device includes a voltage calculator connected to the shunt resistor, the voltage calculator measuring between the first voltage detector and the second voltage detector. and the voltage value measured between the third voltage detection unit and the fourth voltage detection unit are averaged, and the averaged voltage value is a detected voltage value. to decide.
  • the current detection device includes a voltage calculator connected to the shunt resistor, the voltage calculator measuring between the first voltage detector and the fourth voltage detector. or the voltage value measured between the second voltage detector and the third voltage detector is determined as the detected voltage value.
  • the current detection device includes a voltage calculator connected to the shunt resistor, the voltage calculator measuring between the first voltage detector and the fourth voltage detector. and the voltage value measured between the second voltage detection unit and the third voltage detection unit are averaged, and the averaged voltage value is a detected voltage value. to decide.
  • the shunt resistor has a first protrusion and a second protrusion.
  • a shunt resistor having such a structure can reduce the absolute value of its temperature coefficient of resistance.
  • FIG. 11 illustrates one embodiment of a shunt resistor; It is a figure which shows the shunt resistor to which the wiring member was connected. It is an enlarged view of a 1st protrusion part. It is an enlarged view of a 2nd protrusion part.
  • FIG. 5A is a diagram showing corners formed on the first protrusion.
  • FIG. 5B is a diagram showing a corner formed on the second protrusion.
  • FIG. 6A is a diagram showing another embodiment of the corner.
  • FIG. 6B is a diagram showing another embodiment of the corner.
  • FIG. 3 illustrates a current sensing device with a shunt resistor according to one embodiment.
  • FIG. 8A is a diagram showing, as a comparative example, a wiring member connected to a conventional shunt resistor having protrusions on only one side.
  • FIG. 8B is a diagram showing, as a comparative example, a wiring member connected to a conventional shunt resistor having protrusions on only one side.
  • FIG. 8C is a diagram showing, as a comparative example, a wiring member connected to a conventional shunt resistor having protrusions on only one side.
  • FIG. 8D is a diagram showing, as a comparative example, a wiring member connected to a conventional shunt resistor having protrusions on only one side.
  • FIG. 9A is a diagram showing a wiring member connected to a shunt resistor according to one embodiment
  • 9B is a diagram illustrating wiring members connected to a shunt resistor according to one embodiment
  • FIG. 9C is a diagram showing wiring members connected to a shunt resistor according to one embodiment
  • FIG. 9D is a diagram illustrating a wiring member connected to a shunt resistor according to one embodiment
  • FIG. 5 is a graph showing the rate of change in resistance value with temperature change of a conventional shunt resistor having a protrusion on only one side as a comparative example
  • FIG. 5 is a graph showing the rate of change in resistance value of the shunt resistor according to the embodiment with temperature change.
  • FIG. 11 illustrates another embodiment of a shunt resistor;
  • FIG. 1 is a diagram showing one embodiment of a shunt resistor.
  • the shunt resistor 1 includes a resistor 5 made of a resistor alloy plate material having a predetermined thickness and a predetermined width, and both ends of the resistor 5 in the first direction (that is, both side connection surfaces).
  • a pair of electrodes 6,7 composed of a highly conductive metal connected to 5a,5b.
  • the electrode 6 has a contact surface 6a that contacts one end (one connection surface) 5a of the resistor 5, and the electrode 7 has a contact surface that contacts the other end (other connection surface) 5b of the resistor 5. 7a.
  • Bolt holes 8 and 9 for fixing the shunt resistor 1 with screws or the like are formed in the electrodes 6 and 7, respectively.
  • FIG. 2 is a diagram showing a shunt resistor to which wiring members are connected.
  • the electrodes 6 are connected to wiring members (busbars) 40 and the electrodes 7 are connected to wiring members (busbars) 41 .
  • Each of the wiring members 40 and 41 is made of a conductive metal.
  • a bolt hole 48 communicating with the bolt hole 8 is formed in the wiring member 40
  • a bolt hole 49 communicating with the bolt hole 9 is formed in the wiring member 41 .
  • the first direction is the length direction of the resistor 5 and corresponds to the length direction of the shunt resistor 1.
  • the length direction of the shunt resistor 1 is the direction in which the electrode 6, the resistor 5, and the electrode 7 are arranged in this order.
  • the direction perpendicular to this first direction is the second direction.
  • the second direction is the width direction of the shunt resistor 1 .
  • electrodes 6 and 7 have the same structure and are arranged symmetrically with respect to resistor 5 .
  • Both ends 5a and 5b of the resistor 5 are connected (joined) to electrodes 6 and 7 by means of welding (for example, electron beam welding, laser beam welding, brazing, or soldering).
  • An example of the material of the resistor 5 is a low-resistance alloy material such as a Cu--Mn alloy.
  • An example of the material of the electrodes 6 and 7 is copper (Cu).
  • the resistor 5 has a higher resistivity than the electrodes 6,7.
  • the shunt resistor 1 has a first protrusion 11 formed on its first side S1 and a second protrusion 11 formed on a second side S2 opposite to the first side S1. and a projecting portion 12 .
  • the first side surface S1 and the second side surface S2 are surfaces parallel to the first direction.
  • the first protrusion 11 extends outward from the first side surface S1
  • the second protrusion 12 extends outward from the second side surface S2.
  • the first protrusion 11 and the second protrusion 12 are arranged symmetrically with respect to the center of the shunt resistor 1 .
  • FIG. 3 is an enlarged view of the first protrusion.
  • the first projecting portion 11 has a portion of the resistor 5 and a portion of the electrodes 6 and 7 .
  • the first projecting portion 11 has voltage detecting portions 21 and 22 for measuring voltages generated across the resistor 5 at both ends 5a and 5b.
  • the voltage detection unit 21 is connected to the connection surface 5b of the resistor 5, and the voltage detection unit 22 is connected to the connection surface 5a of the resistor 5.
  • Voltage detector 21 is part of electrode 7 and voltage detector 22 is part of electrode 6 .
  • the electrode 7 has the voltage detection section 21 and the electrode 6 has the voltage detection section 22 .
  • FIG. 4 is an enlarged view of the second protrusion.
  • the second protrusion 12 has the same shape as the first protrusion 11 .
  • the second projecting portion 12 has a portion of the resistor 5 and a portion of the electrodes 6 and 7 .
  • the second projecting portion 12 has voltage detecting portions 23 and 24 for measuring voltages generated across the resistor 5 at both ends 5 a and 5 b.
  • the voltage detection section 23 is connected to the connection surface 5b of the resistor 5, and the voltage detection section 24 is connected to the connection surface 5a of the resistor 5.
  • Voltage detector 23 is part of electrode 7 and voltage detector 24 is part of electrode 6 .
  • the electrode 7 has the voltage detection section 23 and the electrode 6 has the voltage detection section 24 .
  • the voltage detection section 21 and the voltage detection section 23 are arranged on the same electrode 7 , and the voltage detection section 22 and the voltage detection section 24 are arranged on the same electrode 6 .
  • Voltage detection unit 23 is arranged in the same direction as voltage detection unit 21 in the second direction, and voltage detection unit 24 is arranged in the same direction as voltage detection unit 22 in the second direction.
  • FIG. 5A is a diagram showing corners formed on the first protrusion
  • FIG. 5B is a diagram showing corners formed on the second protrusion.
  • the first projecting portion 11 has a corner portion 53 connected to the electrode 6 and a corner portion 54 connected to the electrode 7
  • the second projecting portion 12 has a corner portion 55 connected to the electrode 6 and a corner portion 56 connected to the electrode 7 .
  • the corner portion 53 is disposed between the side surface 11a of the first protrusion 11 and the side surface 6c of the electrode 6, and the corner portion 54 is located between the side surface 11b of the first protrusion 11 and the electrode 7. It is arranged between the side surface 7c.
  • the corner portion 55 is disposed between the side surface 12a of the second protrusion 12 and the side surface 6b of the electrode 6, and the corner portion 56 is located between the side surface 12b of the second protrusion 12 and the electrode 7. It is arranged between the side surface 7b.
  • each of the corners 53, 54, 55, 56 has a curved shape.
  • at least one of corners 53, 54, 55, 56 may have a curvilinear shape.
  • the corners 53, 54, 55, 56 may have the same curvature (or radius of curvature) or may have different curvatures (or radius of curvature).
  • the rate of change of the resistance value with temperature rise can be changed to the positive side.
  • the rate of change in resistance value with temperature rise can be changed to the negative side.
  • the temperature coefficient of resistance of the shunt resistor 1 can be adjusted.
  • FIGS. 6A and 6B are diagrams showing other embodiments of corners. As shown in Figures 6A and 6B, at least one of the corners 53, 54, 55, 56 may have an obtuse or rectilinear shape. In the embodiment shown in FIG. 6A, angle ⁇ 1 of corner 53 is greater than 90 degrees and less than 180 degrees (ie obtuse). In the embodiment shown in FIG. 6B, angle ⁇ 2 of corner 53 is 180 degrees (ie, linear shape). With such a configuration, the temperature coefficient of resistance of the shunt resistor 1 can also be adjusted.
  • FIG. 7 is a diagram showing a current detection device with a shunt resistor according to one embodiment.
  • the current detection device 30 includes a shunt resistor 1 and a voltage output device 31 that outputs the voltage of the resistor 5 to the outside.
  • a voltage output device 31 is connected to the shunt resistor 1 .
  • the voltage output device 31 has an output connector (output terminal) 35 for outputting a voltage signal (voltage of the resistor 5) from the shunt resistor 1.
  • FIG. 7 is a diagram showing a current detection device with a shunt resistor according to one embodiment.
  • the current detection device 30 includes a shunt resistor 1 and a voltage output device 31 that outputs the voltage of the resistor 5 to the outside.
  • a voltage output device 31 is connected to the shunt resistor 1 .
  • the voltage output device 31 has an output connector (output terminal) 35 for outputting a voltage signal (voltage of the resistor 5) from the shunt resistor 1.
  • the voltage output device 31 further includes a current detection circuit board 34.
  • the current detection circuit board 34 has voltage signal wirings 46A, 46B, 46C, and 46D for transmitting the voltage signal (voltage of the resistor 5) from the shunt resistor 1 to the output connector 35, and ground wirings 50 and 51. are doing.
  • the voltage signal wirings 46A, 46B, 46C, and 46D are wired on the voltage detection circuit board 34 so as to be line symmetrical.
  • a current detection circuit board 34 is arranged on the shunt resistor 1 .
  • the current detection circuit board 34 further includes voltage terminal pads (more specifically, copper foil portions) 36A, 36B, 36C, and 36D.
  • One end of the voltage signal wiring 46 A is connected to the voltage terminal pad 36 A, and the other end is connected to the output connector 35 .
  • One end of the voltage signal wiring 46 B is connected to the voltage terminal pad 36 B, and the other end is connected to the output connector 35 .
  • One end of the voltage signal wiring 46C is connected to the voltage terminal pad 36C, and the other end is connected to the output connector 35.
  • One end of the voltage signal wiring 46D is connected to the voltage terminal pad 36D, and the other end is connected to the output connector 35.
  • One end of the ground wiring 50 is connected to the voltage terminal pad 36D (or voltage terminal pad 36C), and the other end is connected to the output connector 35 .
  • One end of the ground wiring 51 is connected to the voltage terminal pad 36C (or the voltage terminal pad 36D).
  • the voltage terminal pad 36A is electrically connected to the voltage detection position 16A of the voltage detection portion 21 of the first projecting portion 11 via internal wiring (not shown) of the current detection circuit board 34.
  • the voltage terminal pad 36B is electrically connected to the voltage detection position 16B of the voltage detection portion 23 of the second projecting portion 12 via internal wiring (not shown) of the current detection circuit board 34 .
  • the voltage terminal pad 36 ⁇ /b>C is electrically connected to the voltage detection position 16 ⁇ /b>C of the voltage detection portion 24 of the second projecting portion 12 via internal wiring (not shown) of the current detection circuit board 34 .
  • the voltage terminal pad 36 ⁇ /b>D is electrically connected to the voltage detection position 16 ⁇ /b>D of the voltage detection portion 22 of the first projecting portion 11 via internal wiring (not shown) of the current detection circuit board 34 .
  • the internal wiring and the voltage detection units 21, 22, 23, and 24 are connected by means such as soldering.
  • voltage detection terminals (vertically extending conductive pins) are provided on the voltage detection units 21, 22, 23, and 24 by means of soldering or the like, and the voltage detection terminals are connected to conductive wires (eg, aluminum wires). or a means for inserting the voltage detection terminal into a through hole formed in the circuit board.
  • current detection circuit board 34 may include an operational amplifier (amplifier) for amplifying the voltage signal from shunt resistor 1, an A/D converter, and/or a temperature sensor.
  • the current detection device 30 includes a voltage calculator 65 connected to the shunt resistor 1 via the output connector 35 and the current detection circuit board 34 .
  • the voltage calculation section 65 is a calculation device that determines the detected voltage value of the shunt resistor 1, and an example of the voltage calculation section 65 is a microcomputer or a voltage calculation circuit. In one embodiment, the voltage calculator 65 may be provided on the current detection circuit board 34 .
  • Voltage calculation unit 65 calculates a voltage obtained by combining the voltage value measured between voltage detection unit 21 and voltage detection unit 22 and the voltage value measured between voltage detection unit 23 and voltage detection unit 24. It is configured to average the values and determine the averaged voltage value as the detected voltage value. In this way, the voltage calculator 65 may determine the average value of the voltages measured by the voltage detectors arranged along the first direction of the shunt resistor 1 as the detected voltage value.
  • the voltage calculation unit 65 can output a more stable detected voltage even if the temperature coefficient of resistance is affected by variations in the material, shape, etc. of the shunt resistor 1 .
  • the voltage calculation unit 65 calculates the voltage value measured between the voltage detection unit 21 and the voltage detection unit 24 and the voltage value measured between the voltage detection unit 22 and the voltage detection unit 23. , are averaged, and the averaged voltage value is determined as the detected voltage value. In this way, the voltage calculator 65 may determine the average value of the voltages measured by the voltage detectors arranged on the diagonal line in the second direction of the shunt resistor 1 as the detected voltage value.
  • the voltage calculation unit 65 calculates the voltage value measured between the voltage detection unit 21 and the voltage detection unit 24 or the voltage value measured between the voltage detection unit 22 and the voltage detection unit 23. It is configured to determine the detected voltage value. In this way, the voltage calculation section 65 may determine the voltage value measured by the voltage detection section arranged diagonally in the second direction of the shunt resistor 1 as the detected voltage value.
  • FIGS. 8A to 8D are diagrams showing a wiring member connected to a conventional shunt resistor having a protrusion on only one side as a comparative example.
  • 9A-9D illustrate wiring members connected to a shunt resistor according to one embodiment. Arrows in FIGS. 8A to 8D and arrows in FIGS. 9A to 9D indicate the direction of current flow.
  • 9A, wiring members 40, 41 are connected to electrodes 6, 7 along the first direction of shunt resistor 1. In FIG.
  • the arrangement shown in FIG. 9A may be referred to as a serial arrangement.
  • the wiring members 40 and 41 are connected to the electrodes 6 and 7 along the second direction so as to extend toward the first protrusion 11 side.
  • the arrangement shown in FIG. 9B may be referred to as a U-shaped arrangement.
  • the wiring members 40 and 41 are connected to the electrodes 6 and 7 along the second direction so as to extend toward the second projection 12 side.
  • the arrangement shown in FIG. 9C may be referred to as an inverted U-shaped arrangement.
  • the wiring member 40 is connected to the electrode 6 along the second direction so as to extend toward the first projecting portion 11, and the wiring member 41 extends toward the second projecting portion 12. It is connected to the electrode 7 along the second direction.
  • the arrangement shown in FIG. 9D may be referred to as an S-shaped arrangement.
  • the shunt resistor does not have a protrusion corresponding to the protrusion 12 of the shunt resistor 1 according to this embodiment.
  • the shunt resistors are arranged in series
  • the shunt resistors are arranged in a U shape
  • the shunt resistors are arranged in an inverted U shape.
  • the shunt resistors are arranged in an S-shape.
  • FIG. 10 is a graph showing the rate of change in resistance value with temperature change of a conventional shunt resistor having a protrusion on only one side as a comparative example.
  • FIG. 11 is a graph showing the rate of change in resistance value of the shunt resistor according to this embodiment with temperature change.
  • the horizontal axis indicates the temperature of the shunt resistor
  • the vertical axis indicates the change rate of the resistance value of the shunt resistor.
  • the voltage value obtained by combining the voltage value measured between the voltage detection unit 21 and the voltage detection unit 24 and the voltage value measured between the voltage detection unit 22 and the voltage detection unit 23 is The change rate of the resistance value is shown when the averaged voltage value is used as the detected voltage value.
  • a curve connecting points x indicates the rate of change in the resistance value of the shunt resistor when the wiring members 40 and 41 are arranged in series
  • a curve connecting points ⁇ indicates the rate of change in the resistance value of the wiring members 40 and 41 when the wiring members 40 and 41 are arranged in a U shape.
  • the curve connecting the circles shows the rate of change in the resistance value of the shunt resistor when the wiring members 40 and 41 are arranged in an inverted U shape.
  • the rate of change in the resistance value of the shunt resistor is low.
  • the rate of change of resistance of the shunt resistor is very high.
  • the rate of change in resistance varies depending on the direction in which the wiring members 40 and 41 are connected to the shunt resistor. It may be a design restriction such as restricting the mounting position.
  • the rate of change in the resistance value of the shunt resistor 1 is It is significantly lower than the rate of change of resistance of a shunt resistor with protrusions on only one side.
  • the change rate of the resistance value of the shunt resistor 1 is remarkably low.
  • the change rate of the resistance value of the shunt resistor 1 is remarkably low.
  • the shunt resistor 1 since the shunt resistor 1 has the first projecting portion 11 and the second projecting portion 12, the shunt resistor 1 does not change depending on the arrangement of the wiring members 40 and 41. Resistance can be measured. In other words, the shunt resistor 1 can measure the resistance value without being changed by the current path through itself.
  • the shunt resistor 1 can reduce the change rate of its own resistance value as a whole.
  • stable current detection is possible regardless of the connection direction of the wiring members 40 and 41 to the shunt resistor 1.
  • the mounting position of the shunt resistor 1 Increased design freedom.
  • the change rate of the resistance value of the shunt resistor 1 can be significantly reduced.
  • the shunt resistance even if the contact positions of the wiring members 40 and 41 with the shunt resistor 1 change due to thermal expansion or contraction due to temperature change, and the current path changes, the shunt resistance The influence on the temperature coefficient of resistance of the device 1 can be reduced.
  • FIG. 12 is a diagram showing another embodiment of the shunt resistor.
  • the shunt resistor 1 has a first recess 71 formed on the first side S1 and a second recess 72 formed on the second side S2.
  • the first projection 11 is arranged in the first recess 71 and the second projection 12 is arranged in the second recess 72 .
  • a slit 71b is formed between the first projecting portion 11 and the electrode 6, and a slit 71a is formed between the first projecting portion 11 and the electrode 7.
  • a slit 72 b is formed between the second projecting portion 12 and the electrode 6 and a slit 72 a is formed between the second projecting portion 12 and the electrode 7 .
  • the shunt resistor 1 has the first projecting portion 11 and the second projecting portion 12, so that the same effect as the embodiment described above can be achieved.
  • the present invention can be used for shunt resistors and current detection devices.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Details Of Resistors (AREA)

Abstract

La présente invention se rapporte à une résistance shunt et à un dispositif de détection de courant. Une résistance shunt (1) comprend une première saillie (11) et une seconde saillie (12). La première saillie (11) comprend une partie d'un corps résistif (5) et une partie d'une paire d'électrodes (6, 7). La seconde saillie (12) comprend une partie du corps résistif (5) et une partie de la paire d'électrodes (6, 7).
PCT/JP2022/037221 2021-12-14 2022-10-05 Résistance shunt et dispositif de détection de courant WO2023112438A1 (fr)

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JP2021-202160 2021-12-14
JP2021202160A JP2023087721A (ja) 2021-12-14 2021-12-14 シャント抵抗器および電流検出装置

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WO2023112438A1 true WO2023112438A1 (fr) 2023-06-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016514841A (ja) * 2013-04-05 2016-05-23 イザベレンヒュッテ ホイスラー ゲー・エム・ベー・ハー ウント コンパニー コマンデイトゲゼルシャフト 測定用抵抗器、および対応する測定方法
DE202021105281U1 (de) * 2021-02-11 2021-10-12 Isabellenhütte Heusler Gmbh & Co. Kg Strommesswiderstand
JP2021174802A (ja) * 2020-04-20 2021-11-01 Koa株式会社 シャント抵抗器
JP2021176195A (ja) * 2020-04-27 2021-11-04 Koa株式会社 シャント抵抗器、シャント抵抗器の製造方法、および電流検出装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016514841A (ja) * 2013-04-05 2016-05-23 イザベレンヒュッテ ホイスラー ゲー・エム・ベー・ハー ウント コンパニー コマンデイトゲゼルシャフト 測定用抵抗器、および対応する測定方法
JP2021174802A (ja) * 2020-04-20 2021-11-01 Koa株式会社 シャント抵抗器
JP2021176195A (ja) * 2020-04-27 2021-11-04 Koa株式会社 シャント抵抗器、シャント抵抗器の製造方法、および電流検出装置
DE202021105281U1 (de) * 2021-02-11 2021-10-12 Isabellenhütte Heusler Gmbh & Co. Kg Strommesswiderstand

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