ROGOWSKI CURRENT SENSOR
|Posted date||Mar 29, 2017|
|International application number||2016JP071542|
|International publication number||WO 2017014297|
|Date of international filing||Jul 22, 2016|
|Date of international publication||Jan 26, 2017|
|Title||ROGOWSKI CURRENT SENSOR|
|Abstract||Provided is a current sensor that, in a power semiconductor device, is capable of measuring current variations between chips and within a chip, defect discovery, and preventing failure. In a Rogowski current sensor having a return line path 2 that continuously connects a plurality of coils 1 along one closed line L and that is provided from the winding end of the last coil to the winding start side of the first coil of the plurality of coils 1, and detecting a voltage induced between the winding start side terminal of the first coil and the terminal of the return line path 2 as a function of the current in a circuit to be measured that is inserted inside the closed line L, each coil 1 that constitutes the plurality of coils 1 is formed on a plane perpendicular to the closed line L, among adjacent coils the space between the winding end of one coil and the winding start of the next coil is connected by an outbound line path 2 parallel to the closed line L, and the entire outbound line path 2 and the return line path 3 are arranged in proximity.|
|Outline of related art and contending technology||
The market of IGBT, industrial equipment, the on-vehicle equipment, consumer appliances roughly classified into a field 3. Is directed to large industrial devices, such as a train or an industrial robot, machine tool applications in the motor control inverter. In the in-vehicle equipment, a motor for driving a hybrid car, the air conditioner control inverter for large applications. In the household appliances and the air conditioning system for a camera flash predominates in inverter applications. In particular a hybrid vehicle or an electric vehicle has been increased in the market by the demand IGBT.
As the sensor for detecting the magnitude of the current, the prior art, the core is a ring-shaped coil is wound around the iron core to the center of the CT (current transformer) current is used, the use of the core cannot be miniaturized, the measurement of the magnetic saturation causes a high current to the drawbacks of such an error becomes large. On the other hand, the current sensor using a Rogowski coil, since there is no magnetic saturation in the air-core, the advantage that it can be miniaturized. Such as IGBT, high integration, is becoming a large current in the power device, Rogowski current sensor is believed to be suitable. The Rogowski coil, a plurality of coils, one closed line 1 is connected to a continuously, along the closed line 1 to compensate for the winding turns, the closed line having a line parallel with the condenser, the first one of the plurality of coils of the coil winding start terminal, the condensate line and a terminal of the output terminal according to the present invention. The Rogowski coil can be used as a current sensor, as described in Patent Document 1-4.
To Patent Document 5, the conductor or conductive wire wound around the core of a non-magnetic material and, disposed in the interior of the measured conductor, the conducting wire is a non-magnetic line passes through the center of the cross section in the direction perpendicular to the rolled along the Rogowski coil is described.
To Patent Document 6, the main circuit transforming apparatus is fed to detect an AC current, the amount of alternating current as an analog voltage signal output from the Rogowski coil, wherein the analog voltage signal into a digital electrical signal to an analog/digital converter, the digital electric signals into optical signals and electrical/optical converter and the sensor unit, the host system of the digital optical signal the optical transmission element according to the invention, the Rogowski coil, having an opening through the center of the conductor layer even for a printed substrate 4, both outer layer and the substrate surface of the inner layer 2 substantially around the center of the opening to each of a plurality of radially-extending metal foil is formed, one of the metal foil and the inner layer 2 of the substrate surface adjacent to the metal foil layer between the inner layer, and, and the metal foil on the other substrate surface 2 adjacent to the inner layer and the metal foil layer between the inner layer, the printed circuit board in the thickness direction are plated through hole is electrically connected to each other by the mirror images formed the two windings 2, 2 are mirror images of each of the two said winding current transformer connected in series have been described.
Patent Document 7 is, the first coil 1, the first coil 1 connected in series with the coil 2 of the first, is provided, wherein the first and the second between the coils of the 2 or 1, wherein the first or any one of the coils 2 and 1 disposed in the vicinity of the object to be measured can be detected by the current flowing through the current detection apparatus, wherein the first and the second coil 2 each of 1, which is provided on the surface of the substrate 1 of a conductor pattern, the first substrate 2 provided on the back surface of a conductor pattern, the first conductor 1 and the first conductor patterns 2 and the connection section, current detection device is described.
Patent Document 8 is, on the top layer of a multilayer printed circuit board of the first conductive trace, a second trace is provided on the bottom, extend in the lateral direction relative to the sensor coil is formed into the shape described.
To Patent Document 9, each of the multiple printed circuit boards formed of spiral coils, each of the through holes of the printed circuit board are connected by a multi-coil coil is described.
Is the non-patent document 1, the printed circuit board is not used an example of a Rogowski coil wiring line have been described.
|IPC(International Patent Classification)||
National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
※ Please contact us by E-mail or facsimile if you have any interests on this patent.
Contact Information for " ROGOWSKI CURRENT SENSOR "
- Kyushu Institute of Technology Organization for Promotion of Research and innovation
- URL: http://www.ccr.kyutech.ac.jp/
- Address: 1-1 Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, JAPAN , 804-8550
- Fax: 81-93-884-3531