CN111175558A - Rogowski coil sensor and winding method thereof - Google Patents

Rogowski coil sensor and winding method thereof Download PDF

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Publication number
CN111175558A
CN111175558A CN201910854111.1A CN201910854111A CN111175558A CN 111175558 A CN111175558 A CN 111175558A CN 201910854111 A CN201910854111 A CN 201910854111A CN 111175558 A CN111175558 A CN 111175558A
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CN
China
Prior art keywords
framework
secondary winding
winding
wound
layer
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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Withdrawn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
CN201910854111.1A
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Chinese (zh)
Inventor
何嘉杰
何忠华
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Shanghai Jiayi Electrical Equipment Co ltd
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Shanghai Jiayi Electrical Equipment Co ltd
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Priority to CN201910854111.1A priority Critical patent/CN111175558A/en
Publication of CN111175558A publication Critical patent/CN111175558A/en
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/064—Winding non-flat conductive wires, e.g. rods, cables or cords
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers

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

Abstract

The invention provides a Rogowski coil sensor and a winding method thereof, wherein the method comprises the following steps: a bobbin and at least one secondary winding; the top surface and the bottom surface of skeleton all are equipped with the recess. The secondary winding is an even number of layers, and the number of turns of each layer is the same. The framework is provided with an initial end and a terminating end; each odd layer of the secondary winding starts from the starting end, is wound for a circle clockwise along the framework and then ends at the terminating end; each even layer of the secondary winding starts from the termination end, winds along the framework in the anticlockwise direction for one circle, and then terminates at the starting end. The round groove can adjust the voltage of an anti-interference output signal and can conveniently adjust the precision of a rated control point of the coil; in addition, the invention can improve the control precision of the small current by multi-turn and multi-layer manufacturing, has good linear characteristics, small volume and light weight, and is an ideal sensor for collecting the current.

Description

Rogowski coil sensor and winding method thereof
Technical Field
The invention relates to the technical field of current detection, in particular to a Rogowski coil current sensor.
Background
The current of the Rogowski coil has the characteristics of real-time measurement, high response speed, no saturation and almost no phase error, so that the Rogowski coil can be applied to the field of control of power circuit breakers, and occasions with serious signal distortion, such as relay protection, silicon controlled rectifier, variable frequency speed regulation, resistance welding and the like. However, because the coil frame is a non-magnetic core substance, the generated potential is weak, and the output power is at mv level, so the resistance is generally very large, such as 100K Ω -1M Ω, and the like, and generally considered to be suitable for measuring large current above 400A, and when the current measurement value is small, the problem of low measurement accuracy exists.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a rogowski coil sensor and a winding method thereof, which are used to solve the problem of low measurement accuracy of the low current of the rogowski coil in the prior art.
To achieve the above and other related objects, the present invention provides a rogowski coil sensor, comprising: a bobbin and at least one secondary winding;
the secondary winding is uniformly wound on the framework;
the top surface and the bottom surface of skeleton all are equipped with the recess.
In an embodiment of the invention, the frame is a circular ring, and the groove is circular and located at the center of the circular ring.
In an embodiment of the present invention, the frame is provided with an initiating end and a terminating end, and a gap is left between the initiating end and the terminating end.
In an embodiment of the present invention, the secondary winding includes a plurality of sets of wires, each set of wires includes an inner wire and an outer wire;
the outer lead is matched with the inner lead and wound on the outer side of the inner lead;
the turn density of the inner lead and the outer lead is the same.
In an embodiment of the present invention, the inner conductor starts from the start end of the framework, winds around the framework clockwise for a circle, and then ends at the termination end of the framework;
the outer conductor starts from the termination end of the framework, winds the framework in the anticlockwise direction for a circle, and then terminates at the starting end of the framework.
The invention also provides a winding method of the Rogowski coil sensor, which comprises the following steps:
(1) the inner lead of the secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework, and the winding of the first layer is completed;
(2) and the outer conductor of the secondary winding starts from the terminal end of the framework, is wound for a circle along the framework in the anticlockwise direction, and then is terminated at the starting end of the framework to complete the winding of the second layer.
The invention provides a winding method of a Rogowski coil sensor, which further comprises the following steps:
(1) the inner wire of the second secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework to complete the winding of the first layer;
(2) and the second outer conductor of the secondary winding is wound for a circle along the anticlockwise direction of the framework from the terminal end of the framework and then is terminated at the initial end of the framework, so that the winding of the second layer is completed.
As described above, the rogowski coil sensor and the winding method thereof of the present invention have the following beneficial effects:
1. the top surface and the bottom surface of the framework are provided with circular grooves, the covering area of the secondary winding can be adjusted by 360 degrees, the voltage of the anti-interference output signal is adjusted, and the precision of the rated control point of the coil can be conveniently adjusted.
2. The sensor has the advantages of improving the control precision of small current by multi-turn and multi-layer manufacturing, having good linear characteristics, small volume and light weight, and being an ideal sensor for collecting current.
Drawings
FIG. 1 is a schematic diagram of the skeleton structure of the present invention.
Fig. 2 shows a schematic diagram of the inner wire winding of the secondary winding of the present invention.
Fig. 3 is a schematic diagram of the winding of the outer conductor of the secondary winding of the present invention.
Fig. 4 shows a schematic diagram of the inner wire winding of the second secondary winding of the present invention.
Fig. 5 is a schematic diagram of the outer wire winding of the second secondary winding of the present invention.
Element number description:
1. a framework; 2. a secondary winding;
101. a groove; 201. an inner lead; 202. an outer lead; 203. a starting end; 204. and a terminating end.
Detailed Description
Referring to fig. 1-5, embodiments of the present invention are described below with specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 2, the present invention provides a rogowski coil sensor and a winding method thereof, including: a bobbin 1 and a secondary winding 2;
the secondary winding 2 is uniformly wound on the framework 1;
the framework 1 is a circular ring type and is made of special plastic with the temperature resistance level of 200 ℃, small thermal expansion coefficient, small injection molding deformation and 30% of glass fiber content;
the framework 1 is produced by injection molding or pressure injection, so that the framework 1 is accurate in size and uniform in sectional area, and a foundation is provided for uniform winding of the coil and perpendicular to the magnetic flux direction. The coil density (N) and the coil section (S) are uniform technically, the manufactured hollow coil is of an unoriented structure, the measured current can be accurately measured under a complex external magnetic field, errors caused by the change of the relative position of a bus in the coil are small enough, a primary current-carrying lead and the coil form an angle of 90 degrees, and the more the deviation of the angle, the more sensitive the coil is to external interference.
Referring to fig. 1, grooves 101 are formed in the top surface and the bottom surface of the bobbin 1, the grooves 101 are circular and located in the center of the bobbin, and the secondary windings 2 are uniformly wound on the grooves 101.
The design of the groove can adjust the covering area of the secondary winding 2 on the circular framework by 360 degrees, so that the Rogowski coil sensor can adjust the voltage of an anti-interference output signal and can conveniently adjust the precision of a rated control point of the coil.
The secondary winding 2 is made of high-quality enameled wires with stable quality and uniform density. When winding, the average radius of the coil is far larger than the section radius of the coil to approximate that the magnetic field intensity H in the whole coil is equal everywhere.
Referring to fig. 2-5, in order to achieve maximum interference rejection capability, the secondary winding 2 has at least two layers, or may have multiple layers, but it must have an even number of layers; the number of turns per layer is the same and the spacing between the wires of each layer must be uniform.
Referring to fig. 2 and 3, the secondary winding 2 includes a plurality of sets of conductive wires, each set of conductive wires includes an inner conductive wire 201 and an outer conductive wire 202; the outer lead 202 is matched with the inner lead 201 and wound outside the inner lead 201; the number of turns of the inner wire 201 and the outer wire 202 is the same.
The framework is provided with a starting end 203 and a terminating end 204, and a gap is reserved between the starting end 203 and the terminating end 204.
Referring to fig. 2-5, as the number of the secondary windings 2 increases, the circumference of the inner ring of the coil gradually decreases, and in order to accommodate the coil in a sufficient space, the required gap size needs to be calculated according to parameters such as the size of the skeleton ring, the output voltage value, the specific number of turns, and the wire diameter of the enameled wire; the calculated gap size should be as large as possible to seal the wound coil to achieve the best induction effect.
The inner conductor 201 starts from the starting end 203 of the framework, winds around the framework 1 clockwise for a circle, and then ends at the ending end 204 of the framework;
the outer conductor 202 starts from the terminal end 204 of the bobbin, and ends at the starting end 203 of the bobbin after being wound around the bobbin 1 in the counterclockwise direction for one turn.
Referring to fig. 4, the inner wire 201 of the second secondary winding starts from the start end 203 of the bobbin, and after being wound clockwise for one turn along the bobbin 1, ends at the end 204 of the bobbin;
referring to fig. 5, the outer conductor 202 of the second secondary winding starts from the terminal end 204 of the bobbin and is wound along the bobbin 1 in a counterclockwise direction for one turn and then ends at the starting end 203 of the bobbin.
The invention also provides a winding method of the Rogowski coil sensor, which comprises the following steps:
(1) the inner lead of the secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework, and the winding of the first layer is completed;
(2) and the outer conductor of the secondary winding starts from the terminal end of the framework, is wound for a circle along the framework in the anticlockwise direction, and then is terminated at the starting end of the framework to complete the winding of the second layer.
The invention provides a winding method of a Rogowski coil sensor, which further comprises the following steps:
(1) the inner wire of the second secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework to complete the winding of the first layer;
(2) and the second outer conductor of the secondary winding is wound for a circle along the anticlockwise direction of the framework from the terminal end of the framework and then is terminated at the initial end of the framework, so that the winding of the second layer is completed.
In conclusion, the circular grooves are arranged on the top surface and the bottom surface of the framework, so that the covering area of the secondary winding can be adjusted by 360 degrees, the voltage of an anti-interference output signal can be adjusted, and the precision of a rated control point of a coil can be conveniently adjusted; in addition, the invention can improve the control precision of the small current by multi-turn and multi-layer manufacturing, has good linear characteristics, small volume and light weight, and is an ideal sensor for collecting the current. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. A rogowski coil sensor, comprising: a bobbin and at least one secondary winding;
the secondary winding is uniformly wound on the framework;
the top surface and the bottom surface of skeleton all are equipped with the recess.
2. A rogowski coil sensor, as claimed in claim 1, wherein: the skeleton is the ring, the recess is circular, and is located the center of ring.
3. A rogowski coil sensor, as claimed in claim 2, wherein: the framework is provided with an initial end and a termination end, and a gap is reserved between the initial end and the termination end.
4. A rogowski coil sensor, as claimed in claim 1, wherein: the secondary winding comprises a plurality of groups of conducting wires, and each group of conducting wires comprises an inner conducting wire and an outer conducting wire;
the outer lead is matched with the inner lead and wound on the outer side of the inner lead;
the turn density of the inner lead and the outer lead is the same.
5. A Rogowski coil sensor according to claim 4, wherein: the inner lead is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework;
the outer conductor starts from the termination end of the framework, winds the framework in the anticlockwise direction for a circle, and then terminates at the starting end of the framework.
6. A method of winding a Rogowski coil sensor as claimed in any one of claims 1-5, comprising the steps of:
(1) the inner lead of the secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework, and the winding of the first layer is completed;
(2) and the outer conductor of the secondary winding starts from the terminal end of the framework, is wound for a circle along the framework in the anticlockwise direction, and then is terminated at the starting end of the framework to complete the winding of the second layer.
7. The method of claim 6, further comprising the steps of:
(1) the inner wire of the second secondary winding is wound for a circle clockwise along the framework from the starting end of the framework and then is terminated at the terminating end of the framework to complete the winding of the first layer;
(2) and the second outer conductor of the secondary winding is wound for a circle along the anticlockwise direction of the framework from the terminal end of the framework and then is terminated at the initial end of the framework, so that the winding of the second layer is completed.
CN201910854111.1A 2019-09-10 2019-09-10 Rogowski coil sensor and winding method thereof Withdrawn CN111175558A (en)

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Application Number Priority Date Filing Date Title
CN201910854111.1A CN111175558A (en) 2019-09-10 2019-09-10 Rogowski coil sensor and winding method thereof

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Application Number Priority Date Filing Date Title
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11354351A (en) * 1998-06-03 1999-12-24 Sanyo Denki Kogyo Kk Air-core rectifier
CN201478108U (en) * 2009-07-29 2010-05-19 河北理工大学 Sampling coil of electronic current transformer
CN204087962U (en) * 2014-07-11 2015-01-07 上海品研测控技术有限公司 A kind of Luo-coil for arc fault detection device
US20170170645A1 (en) * 2015-12-15 2017-06-15 Schneider Electric Industries Sas Sensor for measuring current of the rogowski-torus type, protecting and measuring device and electric circuit breaker including such a sensor
US20180059152A1 (en) * 2016-08-31 2018-03-01 Schneider Electric Industries Sas Rogowski coil type sensor for measuring current, measuring device and electrical circuit breaker including such a sensor, and method for winding such a sensor
CN109782043A (en) * 2017-11-10 2019-05-21 许继集团有限公司 Outer card-type current sensor and preparation method thereof, auxiliary production tooling
CN210863860U (en) * 2019-09-10 2020-06-26 上海嘉益电器设备有限公司 Rogowski coil sensor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11354351A (en) * 1998-06-03 1999-12-24 Sanyo Denki Kogyo Kk Air-core rectifier
CN201478108U (en) * 2009-07-29 2010-05-19 河北理工大学 Sampling coil of electronic current transformer
CN204087962U (en) * 2014-07-11 2015-01-07 上海品研测控技术有限公司 A kind of Luo-coil for arc fault detection device
US20170170645A1 (en) * 2015-12-15 2017-06-15 Schneider Electric Industries Sas Sensor for measuring current of the rogowski-torus type, protecting and measuring device and electric circuit breaker including such a sensor
CN107015045A (en) * 2015-12-15 2017-08-04 施耐德电器工业公司 Rogowski coil type current metering sensor, protection and measurement apparatus and breaker
US20180059152A1 (en) * 2016-08-31 2018-03-01 Schneider Electric Industries Sas Rogowski coil type sensor for measuring current, measuring device and electrical circuit breaker including such a sensor, and method for winding such a sensor
CN109782043A (en) * 2017-11-10 2019-05-21 许继集团有限公司 Outer card-type current sensor and preparation method thereof, auxiliary production tooling
CN210863860U (en) * 2019-09-10 2020-06-26 上海嘉益电器设备有限公司 Rogowski coil sensor

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Application publication date: 20200519