CN218675117U - Universal integrated current sensing controller - Google Patents
Universal integrated current sensing controller Download PDFInfo
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- CN218675117U CN218675117U CN202121024868.7U CN202121024868U CN218675117U CN 218675117 U CN218675117 U CN 218675117U CN 202121024868 U CN202121024868 U CN 202121024868U CN 218675117 U CN218675117 U CN 218675117U
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Abstract
The application provides a universal integrated current sensing controller, which comprises a Rogowski coil and a magnetic resistance sensor, wherein the magnetic resistance sensor comprises at least one magnetic resistance sensing chip; the Rogowski coil and the magnetic resistance sensor are both electrically connected with the control unit. According to the method, the Rogowski coil is added into the current sensing controller by utilizing the instant reaction capability of the Rogowski coil to current change, when direct-current fault current occurs, pulse current is formed relative to direct current, and an abrupt magnetic field generated by the pulse current can be captured by the Rogowski coil, so that the measurement of the fault current is realized, the measurement range of the direct-current sensing controller is expanded, a control unit can conveniently judge and act, and the application scene of the direct-current sensor controller is further expanded; the addition of the Rogowski coil enlarges the measurement range of the alternating current.
Description
Technical Field
The application relates to the technical field of circuit breakers, in particular to a universal integrated current sensing controller.
Background
The direct current sensor of the existing circuit breaker can not simultaneously meet the measurement of high-precision small current (A) and large current (kA), and an auxiliary power supply is required to be used to work in some application occasions of large current protection; the existing direct current sensor is sensitive to the temperature of the use environment, and the accuracy of measurement is influenced; the control circuit is complex, and the calibration and test during production are also complex.
The conventional magnetoresistive sensor applying the magnetoresistive sensing chip is limited by the measurement range of the magnetoresistive sensing chip, so that the high-precision measurement of the small current (A) and the high current (kA) can not be realized.
The rogowski coil is an alternating current sensor, is suitable for measuring alternating current in a wide frequency range, has quick instant response capability, and is widely applied to alternating current measurement.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above technical problems, the present application proposes a general integrated current sense controller.
A general integrated current sensing controller comprises a Rogowski coil and a magnetic resistance sensor, wherein the magnetic resistance sensor comprises at least one magnetic resistance sensing chip; the Rogowski coil and the magnetic resistance sensor are both electrically connected with the control unit; the control unit is used for receiving the current values measured by the Rogowski coil and the magnetic resistance sensor and judging and controlling the current values.
In some embodiments, the rogowski coil is used to measure fault current in the event of a dc short circuit; the magnetoresistive sensor is used for measuring direct current under normal operation. Therefore, the Rogowski coil is added into the current sensing controller by utilizing the instant reaction capability of the Rogowski coil to current change, when direct current fault current occurs, pulse current is formed relative to direct current, and an abrupt magnetic field generated by the pulse current can be captured by the Rogowski coil, so that the measurement of the fault current is realized, the measurement range of the direct current sensing controller is expanded, a control unit can conveniently perform judgment and action, and the application scene of the direct current sensor controller is further expanded.
In some embodiments, the rogowski coil is used to measure alternating current outside of the measurement range of the magnetoresistive sensor; the magnetoresistive sensor is used for measuring alternating current in a measuring range of the magnetoresistive sensor. Therefore, the Rogowski coil is added, so that the situation that the measuring range of the alternating current is small due to the fact that the measuring range of the magnetic resistance sensing chip is limited is avoided, and the measuring range of the alternating current is expanded.
In some embodiments, the magnetic sensor further comprises a current transformer, and the current transformer is electrically connected with the control unit and the magnetic sensor respectively through the power taking unit. Therefore, when a direct current short circuit occurs, the winding on the secondary side of the current transformer generates induced current, the induced current supplies power to the magnetic resistance sensor and the control unit through the power taking unit, an external power supply is not needed, and the application scene of the current sensing controller is expanded.
In some embodiments, the rogowski coil is electrically connected to the control unit through an integration unit. Thus, the integrating unit converts the differential voltage signal of the measured current output by the Rogowski coil into the voltage signal of the measured current.
In some embodiments, the rogowski coil comprises a support made of a non-magnetic material and a coil wound on the support.
In some embodiments, the support is a printed circuit board, and the magnetoresistive sensor, the control unit, the power taking unit and the integrating unit are all disposed on the support. Therefore, the magnetic resistance sensor, the control unit, the power taking unit and the integrating unit are all arranged on the PCB of the Rogowski coil, the size and the cost of the current sensing controller are reduced, and the current sensing controller can be applied to more fields and scenes.
In some embodiments, the rogowski coil is a flexible rogowski coil.
In some embodiments, the control unit is electrically connected to the mechanical trip unit. Therefore, the functions which need to be finished by the traditional release are integrated in the current sensing controller, the integration level is improved, the functions of the current sensing controller are enriched, and the production cost is reduced.
In some embodiments, a trip signal unit is disposed on the support of the rogowski coil, and the trip signal unit is electrically connected with the mechanical trip unit. Therefore, the mechanical tripping unit is directly controlled by directly arranging the tripping signal unit on the PCB, the design difficulty of the control unit is reduced, and the applicability of the current sensing controller is improved.
The current sensing controller has the advantages that the Rogowski coil is added into the current sensing controller by utilizing the instant response capability of the Rogowski coil to current change, when direct current fault current occurs, pulse current is formed relative to direct current, and an abrupt change magnetic field generated by the pulse current can be captured by the Rogowski coil, so that the measurement of the fault current is realized, the measurement range of the direct current sensing controller is expanded, a control unit can conveniently judge and act, and the application scene of the direct current sensor controller is further expanded. Meanwhile, the Rogowski coil is added, so that the phenomenon that the measuring range of the magnetic resistance sensing chip is limited to cause that the measuring range of the alternating current is small is avoided, and the measuring range of the alternating current is expanded.
In addition, in the technical solutions of the present application, the technical solutions can be implemented by adopting a conventional means in the art, unless otherwise specified.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a general integrated current sense controller according to an embodiment of the present application.
Fig. 2 is a schematic circuit control diagram of a general integrated current sense controller according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a general integrated current sense controller according to another embodiment of the present application.
Fig. 4 is a schematic circuit control diagram of a general integrated current sense controller according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are illustrative of some, but not all embodiments of the invention, and are not to be construed as limiting the invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example (b):
referring to the specification and the drawings, fig. 1 shows a general integrated current sensing controller provided by an embodiment of the present application, which includes a rogowski coil 1 and a magnetic resistance sensor 2, where the magnetic resistance sensor 2 includes at least one magnetic resistance sensing chip 3; the Rogowski coil 1 and the magnetic resistance sensor 2 are both electrically connected with the control unit 4; the control unit 4 is used for receiving the current values measured by the rogowski coil 1 and the magnetic resistance sensor 2 and performing judgment and control.
In an alternative embodiment, the rogowski coil 1 is used to measure fault current in case of a dc short circuit; the magneto resistive sensor 2 is used to measure a direct current in normal operation. Therefore, the Rogowski coil is added into the current sensing controller by utilizing the instant reaction capability of the Rogowski coil to current change, when direct current fault current occurs, pulse current is formed relative to direct current, and an abrupt magnetic field generated by the pulse current can be captured by the Rogowski coil, so that the measurement of the fault current is realized, the measurement range of the direct current sensing controller is expanded, a control unit can conveniently perform judgment and action, and the application scene of the direct current sensor controller is further expanded.
In an alternative embodiment, the rogowski coil 1 is used for measuring alternating current outside the measuring range of the magnetoresistive sensor 2; the magnetoresistive sensor 2 is used to measure an alternating current within a measurement range of the magnetoresistive sensor 2. Therefore, the Rogowski coil is added, so that the situation that the measuring range of the magnetic resistance sensing chip is limited to cause a small measuring range of the alternating current is avoided, and the measuring range of the alternating current is expanded.
The working principle of the application is that in direct current measurement, when the direct current measurement works normally, the direct current flows through the electric conductor 13, and the magnetic resistance sensor 2 acquires a current value and transmits the current value to the control unit 4; when a short-circuit fault occurs, the current suddenly changes, and the secondary output side of the rogowski coil 1 induces a corresponding short-circuit current signal and transmits the short-circuit current signal to the control unit 4. In the alternating current measurement, when the alternating current exceeds the measurement range of the magnetic resistance sensor 2, the Rogowski coil 1 measures the alternating current, and the measurement range of the alternating current is expanded.
According to the method, the Rogowski coil 1 is added into the current sensing controller by utilizing the instant reaction capability of the Rogowski coil 1 to current change, in direct current measurement, when a short-circuit fault occurs, a fault current forms a pulse current relative to a direct current, and a sudden change magnetic field generated by the pulse current can be captured by the Rogowski coil 1, so that the measurement of a large current during the fault is realized, the measurement range of the current sensing controller is expanded, and the control unit 4 can conveniently perform judgment and action; meanwhile, the current is measured in the normal working process by matching with the magnetoresistive sensor 2, so that more application scenes are met, and the adaptability of the current sensing controller is improved; the magneto-resistive sensing chip has low temperature sensitivity and a simple control circuit, so that the adaptability of the current sensing controller to various application occasions is further improved, and the measurement precision is improved. In the alternating current measurement, the Rogowski coil solves the problem that the measuring range of the alternating current measurement is small due to the fact that the measuring range of the magnetic resistance sensing chip is limited, and the measuring range of the alternating current is expanded.
In alternative embodiments, the magnetoresistive sensing chip 3 may be any one of an Anisotropic Magnetoresistive (AMR) magnetoresistive chip, a Giant Magnetoresistive (GMR) magnetoresistive chip, or a Tunneling Magnetoresistive (TMR) magnetoresistive chip.
Referring to fig. 2 and 3 of the specification, in an alternative embodiment, the current sensing controller further includes a current transformer 5, and the current transformer 5 is electrically connected to the control unit 4 and the magnetic resistance sensor 2 through a power-taking unit 6. Therefore, when a direct current short circuit occurs, the winding on the secondary side of the current transformer generates induced current, the induced current supplies power to the control unit 4 and the magnetic resistance sensor 2 through the power taking unit 6, an external power supply is not needed, and the application scene of the current sensing controller is enlarged.
In an alternative embodiment, the magnetoresistive sensing chip 3 in the magnetoresistive sensor 2 may be electrically connected to the control unit 4 via the conditioning unit 31. Specifically, the conditioning unit 31 may be connected to the power supply unit 6, and when a fault occurs, the power supply unit 6 supplies power.
In an alternative embodiment, if the conditioning unit 31 is integrated in the magnetic resistance sensing chip 3, the magnetic resistance sensing chip 3 may also be directly electrically connected to the control unit 4.
In an alternative embodiment, the magnetic resistance sensor 2 is disposed on a PCB, and in this case, the conditioning unit 31 and the control unit 4 can be disposed on the PCB on which the magnetic resistance sensor 2 is disposed. Therefore, the control unit is integrated on the magnetic resistance sensor, the integration level is improved, the size and the cost of the current sensing controller are reduced, and the current sensing controller can be applied to more fields and scenes.
In an alternative embodiment, when the current transformer 5 is included in the current sensing controller, the magneto-resistive sensing chip 3 in the magneto-resistive sensor 2 may be placed in the magnetic ring of the current transformer 5. Therefore, the volume of the current sensing controller is further reduced, and the integration level is improved.
In an alternative embodiment, the rogowski coil 1 is electrically connected to the control unit 4 via an integration unit 7. Thereby, the integrating unit 7 converts the differential voltage signal of the current to be measured output from the rogowski coil 1 into the voltage signal of the current to be measured, and the measurement accuracy is improved.
In an alternative embodiment, the rogowski coil 1 comprises a support 11 made of a non-magnetic material and a coil 12 wound on the support 11. In particular, the coil 12 is wound around a support 11 with a central opening in which the electrical conductor 13 is received.
In an alternative embodiment, the support 11 may be a printed circuit board, and the magnetoresistive sensor 2, the control unit 4, the power taking unit 6 and the integrating unit 7 are all disposed on the support 11. Therefore, the magnetic resistance sensor 2, the control unit 4, the power taking unit 6 and the integrating unit 7 are all arranged on the PCB of the Rogowski coil, the size and the cost of the current sensing controller are reduced, and the current sensing controller can be applied to more fields and scenes.
In an alternative embodiment, the integration unit 7 may be an integrator, or may be an integration program loaded in the control unit 4.
In an alternative embodiment, the rogowski coil 1 is a flexible rogowski coil.
In an alternative embodiment, the current transformer 3 may be a current transformer with an iron core.
In an alternative embodiment, the control unit 4 is electrically connected to the mechanical trip unit 8. Therefore, the functions which need to be finished by the traditional release are integrated in the current sensing controller, the integration level is improved, the functions of the current sensing controller are enriched, and the production cost is reduced.
Referring to fig. 4 of the specification, in an alternative embodiment, a trip signal unit 9 is arranged on the support 11 of the rogowski coil 1, and the trip signal unit 9 is electrically connected with the mechanical trip unit 8. Therefore, the mechanical tripping unit is directly controlled by directly arranging the tripping signal unit on the PCB, the design difficulty of the control unit 4 is reduced, and the applicability of the current sensing controller is improved.
In an alternative embodiment, at least one of the secondary side of the rogowski coil 1 and the magnetic resistance sensor 2 passing through the conditioning unit 31 is electrically connected with the trip signal unit 9. And after receiving the secondary side signal of the Rogowski coil 1 or the signal of the magnetic resistance sensor 2, the tripping signal unit 9 directly controls the mechanical tripping unit 8 to act according to a set threshold value. Therefore, the tripping action time is greatly shortened, the reaction speed of the circuit breaker is improved, meanwhile, the dependence of the tripping action on the control unit 4 is reduced, and tripping protection can be realized without passing through the control unit 4.
In an alternative embodiment, the trip signal unit 9 is electrically connected to the control unit 4 and sends a signal of a fault trip to the control unit 4. Therefore, the control unit can record the fault type and the fault current according to the measurement signals of the Rogowski coil 1 and the magnetic resistance sensor 2 and the tripping signal of the tripping signal unit 9, and the backtracking of the fault condition is facilitated.
The utility model provides a general integrated current sense controller can be applied to frame circuit breaker and moulded case circuit breaker, through utilizing the instant reaction ability of rogowski coil 1 to the current change, add rogowski coil 1 into current sense controller, in direct current measurement, when short circuit trouble takes place, the fault current forms impulse current for direct current, the abrupt change magnetic field that impulse current produced can be caught by rogowski coil 1, thereby realize the measurement of heavy current during the trouble, enlarged current sense controller's measuring range, so that control unit 4 judges and acts; meanwhile, the current is measured in the normal working process by matching with the magnetoresistive sensor 2, so that more application scenes are met, and the adaptability of the current sensing controller is improved; the magnetic resistance sensing chip has low temperature sensitivity and simple control circuit, thereby further improving the adaptability of the current sensing controller to various application occasions and improving the measurement precision. In the alternating current measurement, the Rogowski coil solves the problem that the measuring range of the alternating current measurement is small due to the fact that the measuring range of the magnetic resistance sensing chip is limited, and the measuring range of the alternating current is expanded.
The present invention is not limited to the above embodiments, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A universal integrated current sensing controller, characterized by comprising a rogowski coil (1) and a magnetoresistive sensor (2), the magnetoresistive sensor (2) comprising at least one magnetoresistive sensing chip (3); the Rogowski coil (1) and the magnetic resistance sensor (2) are both electrically connected with a control unit (4); the control unit (4) is used for receiving the current values measured by the Rogowski coil (1) and the magnetic resistance sensor (2) and judging and controlling the current values.
2. A generic integrated current sense controller according to claim 1,
the Rogowski coil (1) is used for measuring fault current under the condition of direct current short circuit;
the magnetic resistance sensor (2) is used for measuring direct current under normal operation.
3. A generic integrated current sense controller according to claim 1,
the Rogowski coil (1) is used for measuring alternating current outside the measuring range of the magnetic resistance sensor (2);
the magnetic resistance sensor (2) is used for measuring alternating current in a measuring range of the magnetic resistance sensor (2).
4. A universal integrated current sensing controller according to claim 1, further comprising a current transformer (5), said current transformer (5) being electrically connected to said control unit (4) and said magneto resistive sensor (2) respectively by a current taking unit (6).
5. A universal integrated current sensing controller according to claim 4, characterized in that the Rogowski coil (1) is electrically connected to the control unit (4) through an integration unit (7).
6. A universal integrated current sensing controller according to claim 5, characterized in that the Rogowski coil (1) comprises a support (11) made of a non-magnetic material and a coil (12) wound on the support (11).
7. A universal integrated current sensing controller according to claim 6, wherein the support (11) is a printed circuit board, the magneto resistive sensor (2), the control unit (4), the current taking unit (6) and the integrating unit (7) being arranged on the support (11).
8. A universal integrated current sensing controller according to claim 1, characterized in that the rogowski coil (1) is a flexible rogowski coil.
9. A universal integrated current sensing controller according to claim 1, characterized in that the control unit (4) is electrically connected to a mechanical trip unit (8).
10. A universal integrated current sensing controller according to claim 6, characterized in that a trip signal unit (9) is arranged on the support (11) of the Rogowski coil (1), said trip signal unit (9) being electrically connected to the mechanical trip unit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121024868.7U CN218675117U (en) | 2021-05-13 | 2021-05-13 | Universal integrated current sensing controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121024868.7U CN218675117U (en) | 2021-05-13 | 2021-05-13 | Universal integrated current sensing controller |
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| CN218675117U true CN218675117U (en) | 2023-03-21 |
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- 2021-05-13 CN CN202121024868.7U patent/CN218675117U/en active Active
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