EP3008475A1 - Système de détection de courant - Google Patents

Système de détection de courant

Info

Publication number
EP3008475A1
EP3008475A1 EP14733105.2A EP14733105A EP3008475A1 EP 3008475 A1 EP3008475 A1 EP 3008475A1 EP 14733105 A EP14733105 A EP 14733105A EP 3008475 A1 EP3008475 A1 EP 3008475A1
Authority
EP
European Patent Office
Prior art keywords
current
planar
measuring
coil
measuring coil
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP14733105.2A
Other languages
German (de)
English (en)
Inventor
Peter Scholz
Elmar Schaper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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 Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP3008475A1 publication Critical patent/EP3008475A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
    • 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
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F2017/0073—Printed inductances with a special conductive pattern, e.g. flat spiral

Definitions

  • the invention relates to the field of inductive current measurement.
  • assignment type 1 contactors or solid-state switching devices, for example, may be destroyed if they pose no danger such as fire or open live parts.
  • assignment type 2 the downstream devices must remain functional, with a
  • Rogowski coils also called Rogowski current transformer can be used.
  • a Rogowski coil includes a torroid coil with an air core.
  • a current of leading conductors is enclosed by the Rogowski coil, wherein due to the current flowing in the conductor current flowing in the measuring coil an electrical voltage is generated.
  • the invention relates to a current sensor arrangement having a measuring inductance, wherein the measuring inductance comprises the following features: a first planar measuring coil with first windings, which are arranged in a first plane; a second planar measuring coil having second turns arranged in a second plane; and a winding-free connection section electrically connecting the first planar measuring coil to the second planar measuring coil.
  • the measuring coils of the measuring inductance for example, spatially spaced from each other and form a gap, which by means of the winding-free
  • connection section is bridged.
  • the gap serves to receive a current-carrying conductor whose current is to be detected.
  • the current-carrying conductor thus crosses the winding-free connection section, which runs above or below the current-carrying conductor.
  • the measuring inductance can according to a
  • Embodiment thus be interpreted as a modified Rogowski coil.
  • the winding-free section electrically connects the first planar measuring coil and the second planar measuring coil in series. As a result, a composite measuring inductance is realized.
  • the first turns are helically or meander-shaped or spirally formed in the first plane planar, for example wound
  • the second turns are helically or meander-shaped or spirally formed in the second plane planar, for example wound.
  • the respective measuring coil Expansion, in particular the permeable by a magnetic flux surface, the respective measuring coil. This can be in a particularly advantageous manner induction-effective overall cross section of the respective planar measuring coil can be generated.
  • the first windings and the second windings are formed in opposite directions, for example wound. This simulates the operation of a Rogowski coil.
  • the first measuring coil and the second measuring coil can be arranged on both sides of a conductor carrying a current.
  • the current-carrying conductor is thus not enclosed by the measuring inductance, but runs, for example, in the same plane as the planar measuring coils arranged on both sides.
  • the current sensor arrangement comprises a connection terminal having a first measurement connection, which is connected to the first planar measurement coil, and a second measurement connection, which is electrically connected to the second planar measurement coil via a second, no-twist connection section.
  • the second winding-free connection section thus bridges the distance between the planar measuring coils.
  • the current-carrying conductor can be arranged above or below the respective winding-free connection section.
  • the length of the respective winding-free connection portion thus corresponds at least to the width of the current-carrying conductor.
  • the first plane and the second plane are arranged parallel to each other, i. they do not intersect or lie in the same plane, or they run at a predetermined angle, for example 10 °, 30 °, 45 ° or 90 ° to each other.
  • the measuring inductance is arranged on or in a printed circuit board, wherein the first windings, the second windings and the respective winding-free connecting section are formed by strip lines, in particular by printed strip lines.
  • a printed circuit board measuring arrangement is advantageously provided.
  • the first planar measuring coil and the second planar measuring coil have different properties, in particular different inductances, different number of turns or different ones
  • Winding diameter on.
  • the effect of an incident magnetic interference field is reduced in an advantageous manner, which in particular in a
  • the current sensor arrangement comprises a second one
  • a measuring inductance and a third measuring inductance wherein the second measuring inductance, a third planar measuring coil having first windings, which are arranged in the first plane, a fourth planar measuring coil with second windings, which are arranged in the second plane, and a winding-free connecting portion, which the third planar measuring coil electrically connected to the fourth planar measuring coil, wherein the third measuring inductance a fifth planar measuring coil having first windings, which are arranged in the first plane, a sixth planar measuring coil with second windings, which are arranged in the second plane, and a winding-free connection section, which electrically connects the fifth planar measuring coil to the sixth planar measuring coil, and wherein the respective measuring inductance for detecting a current is provided in each case in a current-carrying conductor of a multi-phase conductor system.
  • the measuring coils of the second measuring inductance and of the third measuring inductance may comprise the features of the corresponding planar measuring coils of the first measuring inductance.
  • the measuring inductances can be planar in or on a common
  • the first planar sensing coil and the second planar sensing coil are disposed on both sides of a first current carrying conductor of the polyphase ladder system, the third planar sensing coil and the fourth planar sensing coil being disposed on both sides of a second current carrying conductor of the multiphase ladder system, and wherein the fifth planar measuring coil and the sixth planar measuring coil on both sides of a third current-carrying conductor of the multiphase Ladder system are arranged.
  • a planar measuring arrangement for detecting currents in a multi-phase printed circuit board system is realized.
  • the second planar measuring coil and the third planar measuring coil are arranged side by side at different distances from the first current-carrying conductor or the second current-carrying conductor, wherein the fourth planar measuring coil and the fifth planar measuring coil are arranged side by side in FIG.
  • the measuring inductances are thus adjacent to each other and aligned in a row. Between the respective planar
  • Measuring coils of the measuring inductors run the current-carrying conductors. Due to the increased distances between the measuring inductances, the disturbing influences of currents in adjacent current-carrying conductors are reduced.
  • the measuring inductances are thus arranged laterally one behind the other. This allows a particularly space-saving arrangement of the measuring inductances.
  • the third planar measuring coil are arranged directly next to the first current-carrying conductor and the fourth planar measuring coil is arranged directly next to the third current-carrying conductor. In this meadow can the planar
  • Measuring coils are arranged even at narrower adjacent current-carrying conductors, for example on a circuit board.
  • the current-carrying conductors of the multiphase conductor system pass through the corners of a geometric triangle.
  • the second measuring inductance and the third measuring inductance are arranged at the corners of the imaginary planar geometric triangle.
  • the measuring inductances are arranged symmetrically with respect to one another, so that an efficient suppression of disturbing influences, which can each originate from other current-carrying conductors, can be effected.
  • the geometric extent and / or number of turns of the second, fourth and sixth planar measuring coil, which are arranged within the imaginary triangle can be reduced.
  • the second planar sensing coil has a smaller turn diameter or fewer turns than the first planar sensing coil
  • the fourth planar sensing coil has a smaller turn diameter or fewer turns than the third planar sense coil
  • the sixth planar sense coil has a smaller turn diameter or fewer turns as the fifth planar measuring coil.
  • the respective measuring inductance is formed
  • Output signal in particular an output voltage or an output current output, which in each case depends on a current in the respective current-carrying conductor, wherein the current sensor arrangement further comprises a
  • Monitoring device which is designed to monitor an exceeding of a current threshold by an electric current in the respective current-carrying conductor on the basis of the output signal of the respective measuring inductance.
  • the monitoring device comprises the following:
  • a first monitoring path for receiving the output signal of the measuring inductance with a first threshold detector and one of the first
  • Threshold detector downstream first diode; a second monitoring path for receiving the output signal of the second measuring inductor with a second threshold detector and a second diode connected downstream of the second threshold detector; a third monitoring path for receiving the output signal of the third measuring inductance with a third threshold detector and a third diode connected downstream of the third threshold detector; and a control terminal to which the cathode of the first diode, the cathode of the second diode and the cathode of the third diode are electrically connected; wherein the respective threshold value detector is designed to generate an output current when a threshold value is exceeded by a current represented by the respective output signal.
  • the current sensor arrangement comprises a short-circuit generating device which is connected downstream of the control terminal and designed, in response to an output current at the control terminal, at least one of the current-carrying conductors, in particular for a predetermined one
  • Short circuit interval short circuit.
  • Fig. 1A, 1B current sensor arrangements
  • FIGS. 2A, 2B current sensor arrangements
  • FIG. 1A shows a current sensor arrangement 100 with a measuring inductance 103, wherein the measuring inductance 103 comprises a first planar measuring coil 105 with first windings 106 arranged in a first plane, a second planar measuring coil 107 with second windings 108, which in a second Level are arranged; and a winding-free connecting portion 109 electrically connecting the first planar measuring coil 105 to the second planar measuring coil 107 in series.
  • the first level and the second level are parallel, i. the planar measuring coils 105, 107 are arranged in the same plane.
  • the measuring inductance 103 may be arranged planar on a printed circuit board 101.
  • the winding-free connection portion 109 is, for example, a straight or bent conductor piece, but does not include turns.
  • the windings 106, 108 of the planar measuring coils 105, 107 are helical and designed in the opposite sense, for example wound.
  • the windings 106, 108 may have the same or different diameters and / or the same or different number of turns.
  • a current-carrying conductor 1 15 can be arranged between the planar measuring coils 105, 107, so that the planar measuring coils 105, 107 are arranged on both sides of the current-carrying conductor 1 15.
  • the current of leading conductors 15 further crosses the winding-free connection portion 109 which connects the measuring coils 105, 107.
  • FIG. 1 B shows a current sensor arrangement 102 with a measuring inductance 1 17, wherein the measuring inductance 1 17 a first planar measuring coil 1 19 with first windings 120, which are arranged in a first plane, a second planar measuring coil 121 with second windings 122, which in a second plane, and a winding-free connection portion 123 which connects the first planar measuring coil 1 19 with the second planar measuring coil 121 electrically in series.
  • the first level and the second level are parallel, i. the planar measuring coils 1 19, 121 are arranged in the same plane.
  • the winding-free connection portion 123 is, for example, a straight or bent conductor piece, but does not include turns.
  • the windings 120, 122 of the planar measuring coils 1 19, 121 are formed in a spiral shape and in the opposite sense, for example wound.
  • the windings 120, 122 may have the same or different diameters and / or the same or different number of turns.
  • a current-carrying conductor 1 15 can be arranged between the planar measuring coils 105, 107, so that the planar measuring coils 105, 107 are arranged on both sides of the current-carrying conductor 1 15.
  • the current-carrying conductor 1 15 further crosses the winding-free connection portion 109, which connects the planar measuring coils 105, 107.
  • the measuring inductance 201 comprises a first planar measuring coil 203 with windings 204 and a second planar measuring coil 205 with windings 206 which are formed as conductor tracks, for example strip lines, of a printed circuit board 209.
  • the radii of the windings 204, 206 and / or the number of turns of the windings 204, 206 may be the same or different.
  • the planar measuring coils 203, 205 are for example helical or spiral-shaped, for example wound and by means of a winding-free
  • the current sensor arrangement 200 comprises a connection terminal 213 with a first measuring connection 215, which is connected to the first planar measuring coil 203, and with a second measuring connection 217, which with the second planar
  • Measuring coil 205 is electrically connected via a second winding-free connection portion 219.
  • the winding-free connection portions 217 and 219 bridge a gap between the planar measuring coils 203, 203, in which a current leading conductor 221 can be arranged.
  • the winding-free connection section 21 1 can be arranged above or, as shown in FIG. 2B, below the current-carrying conductor 221.
  • the second winding-free connection section 219 may also be arranged above or below the current-carrying conductor 221.
  • Connection portions 21 1, 219 contribute much less to a magnetic coupling than turns 204, 206 due to the freedom from turns.
  • the influence of the non-winding connection sections 21 1, 219 can therefore be neglected in current detection, in particular if these are perpendicular or nearly perpendicular to the current leading conductors are arranged.
  • the measuring inductances 109, 117, 201 illustrated in FIGS. 1A, 1B, 2A and 2B provide a measuring voltage u (t) which according to the law of induction corresponds to a time derivative of a measuring current i (t) in the current-carrying conductor 221.
  • Measuring inductances 109, 17, 201 can therefore be regarded as modified Rogowski coils.
  • an integrator may be connected downstream of the respective measuring inductance in order to produce an output signal which is proportional to the measuring current.
  • the integrator can by a known circuit with a feedback operational amplifier with a parallel RC element in the
  • FIG. 3 shows a current sensor arrangement 300 with a measuring inductance 301, a second measuring inductance 303 and with a third measuring inductance 305.
  • the measuring inductance 301 comprises a first planar measuring coil 307 with first turns
  • non-winding connection section 306 connects the planar measuring coils 307 and
  • the second measuring inductance 303 comprises a third planar measuring coil 31 1 with first windings 312, a fourth planar measuring coil 313 with second windings 314, and a winding-free connecting section 315, which connects the planar measuring coils 31 1 and 313 in series.
  • the third measuring inductor 305 comprises a fifth planar measuring coil 317 with first windings 318, a sixth planar measuring coil 319 with second windings 320, and a winding-free connecting section 321, which electrically connects the fifth planar measuring coil 317 to the sixth planar measuring coil 319.
  • the current sensor arrangement 300 is provided to detect electrical currents in the current-carrying conductors 325, 327 and 329 of a multi-phase conductor system 323.
  • the current-carrying conductors 325, 327 and 329 for example, extend in a circular arc through the corners 331, 333, 335 of an imaginary, geometric triangle 337.
  • the measuring inductance 301 is arranged at the corner 331 and provided for current detection in the first current-carrying conductor 325.
  • the second measuring inductance 303 is arranged at the corner 333 and provided for current detection in the first current-carrying conductor 327.
  • the third sense inductor 305 is disposed at the corner 335 and provided for current sensing in the first current carrying conductor 329.
  • the second planar sensing coil 309 has a smaller one
  • the fourth planar measuring coil 313 has a smaller turn diameter or fewer turns than the third planar measuring coil 31 1 and the sixth planar measuring coil 319 has a smaller turn diameter or fewer turns than the fifth measuring coil 317.
  • Winding numbers of the measuring coils can be achieved.
  • the geometry optimization illustrated in FIG. 4 makes it possible to achieve the magnetic coupling of the current 11 through the conductor 325 in the third planar measuring coil 31 1 and in the fourth planar measuring coil 313, in the fifth planar measuring coil 315 and in the sixth planar measuring coil 319 is reduced or almost zero.
  • the area of the third planar measuring coil 31 1 can be selected larger than the area of the fourth planar measuring coil 313, which in turn is positioned spatially closer to the conductor 325.
  • FIG. 4 shows a current sensor arrangement 400 with a measuring inductance 401, a second measuring inductance 403 and with a third measuring inductance 405.
  • the measuring inductance 401 comprises a first planar measuring coil 407 with first windings and a second planar measuring coil 409 with second windings.
  • Measuring coils 407, 409 are connected in series.
  • the second measuring inductance 403 comprises a third planar measuring coil 41 1 with first windings and a fourth planar measuring coil 413 with second windings.
  • the planar measuring coils 41 1, 413 are connected in series.
  • the third measuring inductance 405 comprises a third planar measuring coil 415 with first windings and a fourth planar measuring coil 417 with second windings.
  • the planar measuring coils 415, 417 are connected in series.
  • planar measuring coils 407, 409, 41 1, 413, 415, 417 shown in FIG. 4 may be, for example, helical or spiral planar measuring coils with the features described above or below.
  • the current sensor arrangement 400 is intended to detect electrical currents in the current-carrying conductors 419, 421 and 423 of a multiphase conductor system.
  • the current-carrying conductors 419, 421 and 423 are arranged, for example, in parallel.
  • the planar measuring coils 407, 409, 41 1, 413, 415, 417 of the measuring inductors 401, 403 and 405 are each arranged laterally of the current-carrying conductors 419, 421 and 423 ,
  • the measuring inductances 401, 403 and 405 are at least partially displaced laterally along the direction of the current-carrying conductor.
  • the second measuring inductance 403 is laterally offset with respect to the measuring inductance 401 and with respect to the third measuring inductance.
  • the measurement can also be carried out in closely adjacent conductors 419, 421 and 423.
  • the interference can be reduced thereby.
  • the current sensor arrangement 400 may be arranged, for example, together with the current-carrying conductors 419, 421 and 423, on a printed circuit board 425.
  • the planar measuring coils 407, 409, 41 1, 413, 415, 417 shown in FIG. 4 are designed in opposite directions, for example wound, in the directions indicated by arrows in FIG. 4, for example. This can be reduced by adjacent current-carrying conductors 419, 421 and 423 originating interference.
  • the current-carrying conductors 419, 421, 423 are primary conductors and may lead, individually or simultaneously and with any sign-related short-circuit currents.
  • the planar measuring coils 407, 409 and 41 1, 413 and 415, 417 measure the currents (measuring currents) in the conductors 419, 421, 423 by induction.
  • planar measuring coils 407, 409 are connected in series in opposite directions and the induced voltages of the current-carrying primary conductor 419 are superimposed constructively, since the sign of the magnetic field of the conductor 419 in the planar measuring coils 407, 409 is in opposite directions.
  • the field of the primary conductor 419 couples into the planar measuring coils 41 1, 413.
  • the inverse series connection of the planar measuring coils 41 1, 413 subtracts the induced voltages, since the sign of the magnetic field in the second measuring inductance 401 with the planar measuring coils 41 1, 413 is the same and, ideally, no voltage signal remains at the second measuring inductance 401 with the planar measuring coils 41 1, 413.
  • the same explanations also apply to the primary conductors 421 and 423, so that the primary conductor 419 essentially acts only on the planar measuring coils 407, 409, the primary conductor 421 substantially only substantially only on the planar measuring coils 41 1, 413 and the primary conductor 423 the planar measuring coils 415, 416 of the third measuring inductance 405.
  • the different currents can be measured and detected.
  • FIG. 5 shows a current sensor arrangement 500 with a measuring inductance 501, a second measuring inductance 503 and with a third measuring inductance 505.
  • the measuring inductance 501 comprises a first planar measuring coil 507 with first windings and a second planar measuring coil 509 with second windings.
  • Measuring coils 507, 509 are connected in series.
  • the second measuring inductor 503 comprises a third planar measuring coil 51 1 with first
  • the planar measuring coils 51 1, 513 are connected in series.
  • the third measuring inductor 505 comprises a third planar measuring coil 515 with first
  • the planar measuring coils 515, 517 are connected in series.
  • planar measuring coils 507, 509, 51 1, 513, 515, 517 shown in FIG. 5 may be, for example, helical or spiral planar measuring coils with the features described above or below.
  • the current sensor arrangement 500 is provided to detect electrical currents in the current-carrying conductors 519, 521 and 523 of a multi-phase conductor system.
  • the current-carrying conductors 519, 521 and 523 are arranged, for example, in parallel.
  • the measuring inductors 501, 503, 505 with the planar measuring coils 507, 509, 51 1, 513, 515, 517 are arranged in a row in contrast to the exemplary embodiment illustrated in FIG. 4.
  • the second planar measuring coil 509 and the third planar measuring coil 51 1 are arranged directly adjacent to one another at different distances from the first current-carrying conductor 519 or the second current-carrying conductor 521.
  • the fourth planar measuring coil 513 and the fifth planar measuring coil 515 are arranged analogously next to one another at different distances from the second current-carrying conductor 521 or to the third current-carrying conductor 523.
  • planar measuring coils 507, 509, 51 1, 513, 515, 517 shown in FIG. 5 are designed in opposite directions, for example wound, in the directions indicated by arrows in FIG. 4, for example. As a result, interference from adjacent current-carrying conductors 519, 521 and 523 can be reduced.
  • FIG. 6 shows a current sensor arrangement 600 with a measuring inductance 601, a second measuring inductance 603 and a third measuring inductance 605.
  • the measuring inductances 601, 603 and 605 each have planar measuring coils, which on both sides of the respective current-carrying conductor 607, 609 and 61 1 of a polyphase Conductor system are arranged.
  • the measuring inductances 601, 603, 605 each have an impedance Z, for example.
  • the measuring inductors 601, 603, 605 are followed by a monitoring device 613 which is configured to exceed a current threshold value by a current in the respective current-carrying conductor 607, 609 and 61 1 on the basis of the output signal, for example a current or a voltage respective measuring inductance 601, 603 and 605 to monitor.
  • the monitoring device comprises a first monitoring path 615 for receiving the output signal of the measuring inductance 601 with a first
  • the respective diode is generally representative of a rectifier or a rectifier circuit.
  • the measuring inductors 601, 603, 605 are provided to detect measuring currents in the current-carrying conductors 607, 609 and 61 1.
  • Threshold detectors 617, 623, and 629 may include upstream integrators to provide the output signals of
  • Measuring inductances 601, 603, 605 by integration into output signals, which are proportional to the measuring currents.
  • the threshold value detectors 617, 623, 629 are each designed to generate an output current when a threshold value is exceeded by a current represented by the respective output signal.
  • the diodes 619, 625 and 631 are connected on the cathode side to a control terminal 633, whereby an "OR" connection of the output currents of the
  • Threshold detectors 617, 623, 629 is realized.
  • the "OR" operation ensures that the maximum output current is output at the control connection.
  • the threshold detectors 617, 623 and 629 for example, compare
  • a single threshold detection may also be arranged at the control terminal 633. This may be particularly advantageous if it is irrelevant at which primary conductor 607, 609, 61 1 an excessive current occurs.
  • the individual threshold detectors may be omitted in 617, 623, 629, and stages 617, 623, 629 may include, for example, only integration and gain stages.
  • the current sensor arrangement 600 shown in FIG. 6 can therefore be used according to an embodiment for a short-circuit detection.
  • FIG. 7 shows a current sensor arrangement 700 extended for this purpose with, for example, the current sensor arrangement 600 illustrated in FIG. 6.
  • the current sensor arrangement 600 is connected downstream of a short-circuit generation device 701.
  • Short circuit generating device 701 is provided, in response to an output current at the control terminal 633 of the current sensor array 600, in particular in response to an output current at the control terminal 633, at least one of the current carrying conductors 607, 609 and 61 1 or some of the current carrying conductors 607, 609 and 61 1 or all current-carrying conductors 607, 609 and 61 1 short-circuit.
  • the short circuit can be realized, for example, by an electrical connection between at least two of the current-carrying conductors 607, 609 and 61 1 (phase short circuit) or by an electrical connection between at least two of the current-carrying conductors 607, 609 and 61 1 and a ground potential.
  • the short-circuit generating device 701 comprises, for example, an ignition pulse device 703 for generating an ignition pulse for the short circuit, and a short-circuit device 705 connected downstream of the ignition pulse device 703 for generating the short circuit in response to the ignition pulse.
  • the short-circuiting device 705 is connected to the current-carrying conductors 607, 609 and 61 1.
  • the ignition pulse device 703 may include an external power source or be powered by the short-circuit current.
  • an ignitable auxiliary short circuit can be generated efficiently to relieve the current-carrying conductors 607, 609 and 61 1 in the event of a current increase.
  • features of the enhanced current sensor array 700 form a stand-alone short circuit generation system.
  • the extended current sensor arrangement 700 may be preceded by a short-circuit protection device 705, which may comprise fuses or load protection switches in a manner known per se.
  • a supply voltage 707 can also be provided, which supplies, for example, a three-phase supply voltage of 400 V and 50 Hz, with or without a neutral conductor.
  • the extended current sensor arrangement 700 can also be followed by a switching device 709, which can be designed, for example, as a frequency converter, a contactor or a semiconductor motor switching device.
  • the switching device 709 may be an electrical load 71 1, for example, a motor, heating elements or lamps, connected downstream.
  • the detection of the short circuit can be carried out according to an embodiment so that earth faults are detected.
  • any current value as switching threshold for the detection of the short circuit.
  • This can also relatively small short-circuit currents, z. B. 10 to 20 times the rated current of a drive or a motor detected and the auxiliary short circuit are generated.
  • conventional short-circuit devices which are typically critical, especially for small short-circuit currents, can achieve their full performance (as with a nominal short circuit).
  • the measuring arrangements for example the current sensor arrangements, can be used to measure short-circuit currents in a three-phase network.
  • a Rogowski coil may serve as a basis for current measurement. This can be realized compressed to form an 8-shaped basic structure on a printed circuit board. This can reduce precision but allow a cost effective implementation.
  • a threefold embodiment of the measuring coil for the simultaneous measurement of up to 3 short-circuit currents is possible.
  • various arrangements for example an offset arrangement, a side-by-side arrangement and / or a symmetrical arrangement, may be possible.
  • each measuring coil perceives its associated short-circuit current significantly stronger than the currents of the adjacent conductors.
  • the factor can be 2 to several orders of magnitude. This may be due to the Rogowski structure, for example the 8-form as well as the enclosed conductor.
  • the current sensor arrangement comprises three measurement signals which can be integrated and rectified. According to one embodiment, the current sensor arrangement comprises an electronic circuit which compares the measurement signals.
  • the current sensor arrangement comprises an electronic circuit which is fed by the strongest measurement signal for evaluation of a short circuit.
  • an evaluation signal switches on an auxiliary short circuit.
  • the entire circuit for example the current sensor arrangement, can be designed to be passive or active.
  • a passive design can be realized by RC-element integration and simple diodes or by a simple link.
  • an active design may include integration by an operational amplifier or a microprocessor or ⁇ P.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un dispositif de détection de courant, comportant une inductance de mesure qui présente les caractéristiques suivantes : une première bobine de mesure planaire (105) pourvue de premiers enroulements (106) placés dans un premier plan ; une deuxième bobine de mesure planaire (107) pourvue de deuxièmes enroulements (108) placés dans un deuxième plan ; et une partie de liaison (109), exempte d'enroulements, qui connecte électriquement la première bobine de mesure planaire (105) et la deuxième bobine de mesure planaire (107).
EP14733105.2A 2013-06-12 2014-06-04 Système de détection de courant Withdrawn EP3008475A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013106099.4A DE102013106099A1 (de) 2013-06-12 2013-06-12 Stromsensoranordnung
PCT/EP2014/061557 WO2014198601A1 (fr) 2013-06-12 2014-06-04 Système de détection de courant

Publications (1)

Publication Number Publication Date
EP3008475A1 true EP3008475A1 (fr) 2016-04-20

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Application Number Title Priority Date Filing Date
EP14733105.2A Withdrawn EP3008475A1 (fr) 2013-06-12 2014-06-04 Système de détection de courant

Country Status (7)

Country Link
US (1) US20160131682A1 (fr)
EP (1) EP3008475A1 (fr)
KR (1) KR20160014020A (fr)
CN (1) CN105518471A (fr)
DE (1) DE102013106099A1 (fr)
RU (1) RU2015148054A (fr)
WO (1) WO2014198601A1 (fr)

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RU2015148054A (ru) 2017-07-17
DE102013106099A1 (de) 2014-12-18
US20160131682A1 (en) 2016-05-12
CN105518471A (zh) 2016-04-20
WO2014198601A1 (fr) 2014-12-18

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