A device and method for measuring the number of turns of an air gap magnetic ring coil

Abstract

The present invention provides a device and method for measuring the number of turns of an air gap magnetic ring coil, and relates to the field of magnetic ring coil testing. The device comprises: a base, a support base arranged at both ends of the base, a conductive rod arranged at both ends on the support base, a fixing base arranged in the middle of the base, and a fixing member arranged on one side of the fixing base, wherein the fixing base is used to set the air gap magnetic ring coil so that the air gap magnetic ring coil is sleeved on the conductive rod, and the fixing member is used to fix a magnetic field detection probe so that the magnetic field detection probe is placed in the air gap of the air gap magnetic ring coil. The present invention solves the problem that there is a lack of a device and method for accurately measuring the number of turns of an air gap magnetic ring coil in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic ring coil turns testing, and in particular to a device and method for measuring the turns of an air gap magnetic ring coil. Background Art

[0002] The magnetic ring coil consists of a magnetic core and a coil winding. The coil is wound on the magnetic ring manually or by machine. The accuracy of the number of coil turns is crucial to the performance of the magnetic ring coil. At present, the principle of electromagnetic induction is generally used to measure the number of coil turns. A current signal of a certain frequency is passed through a magnetic core coil to be measured, and the magnitude of the secondary current is measured from the secondary side of the coil. According to the electromagnetic induction principle of the transformer, the ratio of the amplitude of the secondary current signal on the secondary side of the coil to the magnitude of the primary current of a single-turn input is the reciprocal of the number of turns, that is, N = Ip / Is, N is the number of turns, Ip is the primary input current, and Is is the secondary current on the secondary side of the coil. This principle can be used to measure the value of the number of coil turns and display it.

[0003] However, this measurement method is only applicable to measuring the number of turns of a closed magnetic ring coil. There is currently no mature equipment or method for measuring the number of turns of a magnetic ring coil (non-closed) with an air gap. When using the traditional closed magnetic ring coil turn test method, due to the large leakage inductance of the magnetic core with an open air gap, the output and input of the secondary current on the secondary side of the coil no longer follow the inverse relationship of the turns ratio, the error is extremely large, and the test accuracy is poor, which is far from meeting the requirements for its turn accuracy. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a device and method for measuring the number of turns of an air gap magnetic ring coil, aiming to solve the problem in the prior art that there is a lack of a device and method for accurately measuring the number of turns of an air gap magnetic ring coil.

[0005] According to an embodiment of the present invention, a device for measuring the number of turns of an air gap magnetic ring coil comprises: a base, a support base arranged at both ends of the base, a conductive rod respectively arranged on the support base at both ends, a fixed base arranged in the middle of the base, and a fixing member arranged on one side of the fixed base, the fixed base is used to set the air gap magnetic ring coil so that the air gap magnetic ring coil is sleeved on the conductive rod, and the fixing member is used to fix a magnetic field detection probe so that the magnetic field detection probe is placed in the air gap of the air gap magnetic ring coil.

[0006] In addition, the device for measuring the number of turns of an air gap magnetic ring coil according to the above embodiment of the present invention may also have the following additional technical features:

[0007] Furthermore, the support seat includes a base plate and a vertical plate arranged on the base plate, the vertical plate is provided with a mounting hole adapted to the conductive rod, the mounting hole and the conductive rod are gap-matched, a copper bus is also provided on the outer side of the vertical plate and is located on the base plate, and the support seat is a conductor so that the conductive rod can be energized through the copper bus.

[0008] Furthermore, a limit piece is provided on one side of any of the vertical plates, and the limit piece includes a main body, a limit pin and a spring. The main body is provided with a through hole adapted to the mounting hole so that the conductive rod is at least partially placed in the through hole. A limit hole connected to the through hole is provided at the top of the through hole, and a spring and a limit pin arranged on the spring are provided at the bottom of the limit hole. An arc groove is provided on the side of the conductive rod close to the limit piece, and the limit pin includes a hemispherical portion adapted to the arc groove.

[0009] Furthermore, the fixing seat includes a fixing block, the fixing block is provided with an arc groove adapted to the air gap magnetic ring coil, elastic parts are provided on both sides of the arc groove, and the air gap magnetic ring coil is fixed in the arc groove.

[0010] Furthermore, the fixing member includes a fixing plate, a movable block arranged on the fixing plate and a fastener arranged on the movable block. When in use, the magnetic field detection probe is clamped between the fixing block and the fixing plate and fixed by the fastener.

[0011] Furthermore, the fixed plate is provided with a step hole, the step hole includes a top hole and a bottom hole, the bottom hole is a threaded hole, a cylinder extends outward from the bottom of the movable block, and a through hole is provided on the top of the movable block that passes through the cylinder, the outer contour of the cylinder is adapted to the top hole, and the fastener cooperates with the bottom hole through the through hole.

[0012] Another object of the present invention is to provide a method for measuring the number of turns of an air gap magnetic ring coil, based on the above-mentioned air gap magnetic ring coil number of turns measuring device, for testing the number of turns of an air gap magnetic ring coil, the method comprising:

[0013] The correction air gap magnetic ring coil is arranged on a fixing member, a conductive rod is fixed on a supporting seat, so that the middle part of the conductive rod is located in the correction air gap magnetic ring coil, and a magnetic field detection probe is fixed on the fixing member, so that the magnetic field detection probe is located in the air gap of the correction air gap magnetic ring coil;

[0014] A first current is passed through the conductive rod, and a second current is passed through the two ends of the secondary side of the correction air gap magnetic ring coil, and it is determined whether the real-time magnetic field intensity value detected by the magnetic field detection probe is zero;

[0015] If not, the first current or the second current is adjusted so that the real-time magnetic field strength value is zero, and the corresponding first correction current and second correction circuit are determined, and then the measuring device is disassembled and reset;

[0016] The air gap magnetic ring coil to be tested is arranged on a fixing member, a conductive rod is fixed on a supporting seat, so that the middle part of the conductive rod is located in the air gap magnetic ring coil to be tested, and a magnetic field detection probe is fixed on the fixing member, so that the magnetic field detection probe is located in the air gap of the air gap magnetic ring coil to be tested;

[0017] The first correction current is passed through the conductive rod, and the second correction current is passed through both ends of the secondary side of the air gap magnetic ring coil to be tested;

[0018] After a preset time, the value detected by the magnetic field detection probe is recorded as the second magnetic field intensity;

[0019] The number of turns of the air gap magnetic ring coil to be tested is confirmed according to the comparison table of the second magnetic field strength and the number of magnetic field turns.

[0020] Furthermore, before the step of setting the correction air gap magnetic ring coil on the fixing member, the step includes:

[0021] Determine the first current and the second current according to a preset formula, that is, determine a first current value and a first direction corresponding to the first current, and determine a second current value and a second direction corresponding to the second current;

[0022] The preset formula is:

[0023]

[0024] Wherein, H is the magnetic field intensity, the magnitude of I1 is the first current value, the positive and negative of I1 is the first direction, the magnitude of I2 is the second current value, the positive and negative of I2 is the second direction, N1 is the number of turns of the conductive rod, N2 is the number of turns of the air gap magnetic ring coil, here the number of turns of the correction air gap magnetic ring coil is taken, and r is the core diameter of the air gap magnetic ring coil;

[0025] When determining the first current and the second current, the value of H is 0 and the value of N1 is 1.

[0026] Furthermore, after the step of determining the first current and the second current according to a preset formula, the step includes:

[0027] The value of N2 is reduced or increased in sequence, and a plurality of theoretical magnetic field strength values ​​obtained according to the preset formula are determined with other parameters unchanged, and the magnetic field circle number comparison table is determined according to the theoretical magnetic field strength values.

[0028] Compared with the prior art, the present invention fixes the air gap magnetic ring coil by setting a fixing seat, and sets a conductive rod passing through the air gap magnetic ring coil, the two ends of the conductive rod are supported and fixed by the support seat, and the magnetic field detection probe is set in the air gap by the fixing piece, and then the magnetic field conditions of the air gap magnetic ring coil and the conductive rod under the initial current conduction condition are first detected and corrected, and then the initial current is adjusted to obtain a specific current, so that the magnetic field intensity at the air gap is zero, and the magnetic field intensity conditions at the air gap corresponding to different numbers of turns under the specific current condition are promoted to determine the magnetic field number comparison table, and then according to the specific current, the air gap magnetic ring coil to be detected is The conductive rod is energized to obtain the magnetic field strength condition at the air gap at this time, and then the corresponding number of turns of the air gap magnetic ring coil to be detected is determined according to the magnetic field turn number comparison table. Since the device of this method detects the coil through the corresponding relationship of the magnetic field condition, and firstly calibrates the air gap magnetic ring coil for detection and calibration, the corresponding relationship between the magnetic field strength at the air gap and the number of coils under a specific current condition is determined, that is, the leakage magnetic condition, the environment or other deviation conditions in the actual test have been considered, and then the corresponding number of turns of the air gap magnetic ring coil to be detected can be accurately determined through the change of the magnetic field strength. Therefore, the present invention solves the problem of the lack of a device and method for accurately measuring the number of turns of the air gap magnetic ring coil in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a device for measuring the number of turns of an air gap magnetic ring coil in one embodiment of the present invention;

[0030] Figure 2 It is a cross-sectional schematic diagram of the assembled stopper, conductive rod and support base in one embodiment of the present invention;

[0031] Figure 3 is a cross-sectional schematic diagram of a fixing member in one embodiment of the present invention;

[0032] Figure 4 It is a flow chart of a method for measuring the number of turns of an air gap magnetic ring coil in one embodiment of the present invention;

[0033] Description of main component symbols:

[0034] Base 10 Support seat 20 Conductive rod 30 Fixed seat 40 Fixings 50 Base Plate 21 Vertical Board 22 Mounting holes 23 Copper busbar 24 Limiting parts 60 main body 61 Limit pin 62 spring 63 Through Hole 64 Limit hole 65 Arc groove 31 Hemisphere 621 Fixed block 41 Arc groove 42 Elastic parts 43 Fixed plate 51 Activity Block 52 fastener 53 Step hole 54 Top hole 541 Bottom hole 542 cylinder 521 Vias 522

[0035] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] See also Figures 1 to 3 , shown is an air gap magnetic ring coil turn number measuring device in one embodiment of the present invention, including a base 10, a support base 20 arranged at both ends of the base 10, a conductive rod 30 with both ends respectively arranged on the support base 20, a fixed base 40 arranged in the middle of the base 10, and a fixing member 50 arranged on one side of the fixed base 40, the fixed base 40 is used to set the air gap magnetic ring coil so that the air gap magnetic ring coil is sleeved on the conductive rod 30, and the fixing member 50 is used to fix the magnetic field detection probe so that the magnetic field detection probe is placed in the air gap of the air gap magnetic ring coil.

[0040] It can be understood that in specific use, the air gap magnetic ring coil is fixed by setting a fixing seat 40, and a conductive rod 30 passing through the air gap magnetic ring coil is set, and both ends of the conductive rod 30 are supported and fixed by the support seat 20, and the magnetic field detection probe is set in the air gap through the fixing member 50, and then the magnetic field conditions of the air gap magnetic ring coil and the conductive rod 30 under the initial current conduction condition are first detected and corrected, and then the initial current is adjusted to obtain a specific current, so that the magnetic field intensity at the air gap is zero, and the magnetic field intensity conditions at the air gap corresponding to different numbers of turns under the specific current condition are promoted to determine the magnetic field number comparison table, and then according to the specific current, the magnetic field to be detected is detected. The air gap magnetic ring coil and the conductive rod 30 are energized to obtain the magnetic field strength condition at the air gap at this time, and then the corresponding number of turns of the air gap magnetic ring coil to be detected is determined according to the magnetic field turn number comparison table. Since the device of this method detects the coil through the corresponding relationship of the magnetic field condition, and firstly calibrates the air gap magnetic ring coil to detect and calibrate, the corresponding relationship between the magnetic field strength at the air gap and the number of coils under a specific current condition is determined, that is, the leakage magnetic condition, the environment or other deviation conditions in the actual test have been considered, and then the corresponding number of turns of the air gap magnetic ring coil to be detected can be accurately determined through the change of the magnetic field strength. Therefore, the present invention solves the problem of the lack of a device and method for accurately measuring the number of turns of the air gap magnetic ring coil in the prior art.

[0041] In addition, the support seat 20 includes a bottom plate 21 and a vertical plate 22 arranged on the bottom plate 21, and a mounting hole 23 adapted to the conductive rod 30 is provided on the vertical plate 22, and the mounting hole 23 and the conductive rod 30 are clearance matched, and a copper bar 24 is also provided on the outside of the vertical plate 22 and is located on the bottom plate 21, and the support seat 20 is a conductor, so that the conductive rod 30 is energized through the copper bar 24. By setting the mounting hole 23 and the conductive rod 30 clearance matched, the conductive rod 30 can be separated by plugging and unplugging the conductive rod 30, so as to facilitate the replacement of the air gap magnetic ring coil sleeved on the outside of the conductive rod 30, and accelerate the measurement efficiency of the air gap magnetic ring coil.

[0042] Specifically, a stopper 60 is provided on one side of any vertical plate 22, and the stopper 60 includes a main body 61, a stopper pin 62 and a spring 63. A through hole 64 matching the mounting hole 23 is provided on the main body 61, so that the conductive rod 30 is at least partially placed in the through hole 64. A stopper hole 65 communicating with the through hole 64 is provided on the top of the through hole 64, and a spring 63 and a stopper pin 62 arranged on the spring 63 are provided at the bottom of the stopper hole 65. A circular arc groove 31 is provided on one side of the conductive rod 30 close to the stopper 60, and the stopper pin 62 includes a hemispherical portion 621 matching the circular arc groove 31. By providing the stopper 60, the conductive rod 30 can be stably fixed on the support seat 20 without shaking, which affects the detection accuracy. And in the specific implementation, when the air gap magnetic ring coil needs to be replaced, the conductive rod 30 is moved toward the side of the principle limit piece 60, and the arc groove 31 will squeeze the hemispherical portion 621, and then the hemispherical portion 621 drives the limit pin 62 to move toward the bottom of the limit hole 65 and squeeze the spring 63. When the conductive rod 30 is completely moved out, the limit pin 62 is reset under the action of the spring 63, and the air gap magnetic ring coil is replaced, and the conductive rod 30 is moved toward the limit piece 60 again, so that the conductive rod 30 squeezes the hemispherical portion 621 and then the hemispherical portion 621 drives the limit pin 62 to move toward the bottom of the limit hole 65 and squeeze the spring 63. When the conductive rod 30 moves to the preset position, the arc groove 31 corresponds to the limit hole 65. At this time, under the reset action of the spring 63, the limit pin 62 moves away from the limit hole 65, so that the hemispherical portion 621 is placed in the arc groove 31, thereby squeezing and fixing the conductive rod 30 and limiting the movement of the conductive rod 30. In addition, in a specific implementation, the bottom of the limit pin 62 can be connected to the spring 63 to limit the moving distance of the limit pin 62 by elasticity to prevent the limit pin 62 from falling from the limit hole 65. In addition, a ring edge can be set at the exit of the limit hole 65, and the limit pin 62 can be set to consist of a straight rod and a hemispherical part 621, and the diameter of the hemispherical part 621 is smaller than the diameter of the straight rod, so that only the hemispherical part 621 can extend out of the limit hole 65.

[0043] In addition, the fixing seat 40 includes a fixing block 41, on which an arc groove 42 adapted to the air gap magnetic ring coil is provided, elastic members 43 are provided on both sides of the arc groove 42, and the air gap magnetic ring coil is fixed in the arc groove 42. The arc groove 42 is provided so that the air gap magnetic ring coil can be fixed in the arc groove 42, and the air gap magnetic ring coil is limited and pressed by the elastic member 43 to prevent the air gap magnetic ring coil from shaking and affecting the measurement accuracy. In a specific implementation, the elastic member 43 can be made of rubber, silicone, polyester elastomer, etc.

[0044] Specifically, the fixing member 50 includes a fixing plate 51, a movable block 52 disposed on the fixing plate 51, and a fastener 53 disposed on the movable block 52. When in use, the magnetic field detection probe is clamped between the fixing block 41 and the fixing plate 51 and fixed by the fastener 53. By providing the fixing member 50, the fixing member 50 and the fixing seat 40 cooperate to ensure that the magnetic field detection probe is located at a specific position of the air gap during measurement, so as to ensure the accuracy of the measurement.

[0045] In addition, the fixed plate 51 is provided with a stepped hole 54, which includes a top hole 541 and a bottom hole 542, the bottom hole 542 is a threaded hole, a cylinder 521 extends outward from the bottom of the movable block 52, and a through hole 522 penetrating the cylinder 521 is provided at the top of the movable block 52, the outer contour of the cylinder 521 is adapted to the top hole 541, and the fastener 53 is matched with the bottom hole 542 through the through hole 522. In specific use, the magnetic field detection probe is set between the fixed plate 51 and the movable plate, and the fastener 53 is tightened to make the screw part at the bottom of the fastener 53 match the bottom hole 542, thereby pressing and fixing the magnetic field detection probe on the fixing member 50.

[0046] See also Figure 4 , shown is a method for measuring the number of turns of an air gap magnetic ring coil in one embodiment of the present invention, which is used to test the number of turns of an air gap magnetic ring coil according to the above-mentioned air gap magnetic ring coil number measuring device, and the method includes:

[0047] The correction air gap magnetic ring coil is arranged on a fixing member, the conductive rod is fixed on a supporting seat, the middle part of the conductive rod is located in the correction air gap magnetic ring coil, and the magnetic field detection probe is fixed on the fixing member, the magnetic field detection probe is located in the air gap of the correction air gap magnetic ring coil;

[0048] A first current is passed through the conductive rod, and a second current is passed through the two ends of the secondary side of the correction air gap magnetic ring coil, and it is determined whether the real-time magnetic field intensity value detected by the magnetic field detection probe is zero;

[0049] If not, the first current or the second current is adjusted so that the real-time magnetic field strength value is zero, and the corresponding first correction current and second correction circuit are determined, and then the measuring device is disassembled and reset;

[0050] The air gap magnetic ring coil to be measured is arranged on a fixing member, a conductive rod is fixed on a supporting seat, a middle part of the conductive rod is located in the air gap magnetic ring coil to be measured, and a magnetic field detection probe is fixed on the fixing member, a magnetic field detection probe is located in the air gap of the air gap magnetic ring coil to be measured;

[0051] A first correction current is passed through the conductive rod, and a second correction current is passed through both ends of the secondary side of the air gap magnetic ring coil to be measured;

[0052] After a preset time, the value detected by the magnetic field detection probe is recorded as the second magnetic field intensity;

[0053] Confirm the number of turns of the air gap magnetic ring coil to be tested according to the comparison table of the second magnetic field strength and the number of magnetic field turns.

[0054] In addition, before the step of setting the correction air gap magnetic ring coil on the fixing member, the method further comprises:

[0055] Determine the first current and the second current according to a preset formula, that is, determine a first current value and a first direction corresponding to the first current, and determine a second current value and a second direction corresponding to the second current;

[0056] The default formula is:

[0057]

[0058] Wherein, H is the magnetic field intensity, the magnitude of I1 is the first current value, the positive and negative of I1 is the first direction, the magnitude of I2 is the second current value, the positive and negative of I2 is the second direction, N1 is the number of turns of the conductive rod, N2 is the number of turns of the air gap magnetic ring coil, here the number of turns of the correction air gap magnetic ring coil is taken, and r is the core diameter of the air gap magnetic ring coil;

[0059] When determining the first current and the second current, the value of H is 0 and the value of N1 is 1.

[0060] In addition, the step of determining the first current and the second current according to the preset formula includes: reducing or increasing the value of N2 in sequence, determining multiple theoretical magnetic field strength values ​​obtained according to the preset formula when other parameters remain unchanged, and determining a magnetic field circle number comparison table according to the theoretical magnetic field strength values.

[0061] It should be noted that the correction air gap magnetic ring coil is an air gap magnetic ring coil prepared by the same process as the air gap magnetic ring coil to be tested, but the number of coil turns has been confirmed to meet the production requirements. By way of example and not limitation, in some optional embodiments, the number of turns of the correction air gap magnetic ring coil is 2000Ts, the rated current of the primary side of the coil product is 300A, and according to the turns ratio, the rated current of the secondary side of the coil is 0.15A, and the current directions of the two are opposite. The gaussmeter is calibrated so that the reading of the gaussmeter is 0. At this time, the rated current of the primary side of the coil product is 299.7A. According to the turns ratio, the rated current of the secondary side of the coil is 0. The number of coil turns is determined to be 1999Ts and the air gap magnetic ring coil prepared by the same process is adopted, and the rated current of the primary side of the coil product is 299.7 A, the rated current of the secondary side of the coil is 0.15A, and the parameters are tested. The magnetic field reading on the Gauss meter device is observed to determine that the reading is -1.1937Gs. The above steps are repeated in sequence to determine the number of coil turns, and the air gap magnetic ring coil with a different number of turns from the correction air gap magnetic ring coil is measured, and then it is determined that when the test is performed, the reading within ±1.1937Gs means that the number of turns accuracy 2000±1Ts is met. When the value exceeds ±1.1937Gs, each phase difference of 1.1937Gs represents a phase difference of 1 turn. A positive reading represents multiple turns, and a negative reading represents fewer turns. Thus, a magnetic field turn comparison table is obtained. Then, the air gap magnetic ring coil to be tested is tested by this method to determine the exact number of turns of the air gap magnetic ring coil to be tested, avoiding measurement errors. In addition, experiments have shown that this method can ensure that the error of the measured number of turns is within ±1Ts, which meets production requirements, by accurately judging and calculating the magnetic field strength. However, when the traditional closed magnetic ring coil is used for the turns test, the test value is very unstable and the test accuracy is poor. Taking a coil with a specification of 2000Ts as an example, the measurement error is ±30Ts, which is far from meeting the requirements for its number of turns accuracy.

[0062] The testing method of the present invention first detects the correction air gap magnetic ring coil to determine the magnetic field strength at the air gap, and then confirms the relationship between the current passing through the air gap magnetic ring coil, the number of turns of the air gap magnetic ring coil and the current passing through the conductive copper rod through a formula, and then adjusts the current so that the magnetic field strength at the air gap is 0, thereby determining the parameter conditions of the first current and the second current that need to be passed when testing the air gap magnetic ring coil and the conductive rod, and then using a preset formula and reducing the number of turns of the air gap magnetic ring coil in the formula in turn, thereby determining the magnetic field strength conditions under the current condition at different theoretical numbers of turns, that is, the difference value of the magnetic field strength between the air gap magnetic ring coils with different numbers of turns and the standard number of turns, thereby determining the corresponding relationship between the difference value and the number of turns, that is, Determine the magnetic field circle number comparison table, and then in actual detection, first calibrate it through the correction air gap magnetic ring coil to ensure that the correction air gap magnetic ring coil is under the action of the first correction current and the second correction current. The magnetic field strength at the air gap is zero, that is, the influence between the environmental parameters under the synchronous experimental conditions and the experimental parameters under the actual test conditions, thereby avoiding the influence of the test environment on the test accuracy during the actual test. After the verification is completed, the first correction current and the second correction current are used to measure the air gap magnetic ring coil to be tested, and the difference between the magnetic field strength at the air gap of the air gap magnetic ring coil to be tested and the air gap magnetic field strength of the correction air gap magnetic ring coil is determined, and then the actual coil number of the air gap magnetic ring coil to be tested is determined based on the difference value and the magnetic field circle number comparison table.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A device for measuring the number of turns of an air gap magnetic ring coil, characterized in that: The device comprises: Base; Support seats, arranged at both ends of the base; A conductive rod, both ends of which are respectively arranged on the support seat, and the conductive rod is used to be sleeved on the air gap magnetic ring coil; A fixing seat, arranged in the middle of the base, for fixing the air gap magnetic ring coil sleeved on the conductive rod; A fixing member is arranged on one side of the fixing seat and is used for fixing a magnetic field detection probe so that the magnetic field detection probe is placed in the air gap of the air gap magnetic ring coil.

2. The air gap magnetic ring coil turns measuring device according to claim 1, characterized in that: The support seat includes a base plate and a vertical plate arranged on the base plate, the vertical plate is provided with a mounting hole adapted to the conductive rod, the mounting hole and the conductive rod are loosely matched, a copper bus is also provided on the outer side of the vertical plate and is located on the base plate, and the support seat is a conductor so that the conductive rod can be energized through the copper bus.

3. The air gap magnetic ring coil turns measuring device according to claim 2, characterized in that: A limit piece is provided on one side of at least one of the vertical plates, and the limit piece includes a main body, a limit pin and a spring. A through hole adapted to the mounting hole is provided on the main body so that the conductive rod is at least partially placed in the through hole. A limit hole connected to the through hole is provided on the top of the through hole, and a spring and a limit pin arranged on the spring are provided at the bottom of the limit hole. An arc groove is provided on one side of the conductive rod close to the limit piece, and the limit pin includes a hemispherical portion adapted to the arc groove.

4. The air gap magnetic ring coil turns measuring device according to claim 1, characterized in that: The fixing seat comprises a fixing block, the fixing block is provided with an arc groove adapted to the air gap magnetic ring coil, elastic parts are provided on both sides of the arc groove, and the air gap magnetic ring coil is fixed in the arc groove.

5. The air gap magnetic ring coil turns measuring device according to claim 1, characterized in that: The fixing member includes a fixing plate, a movable block arranged on the fixing plate and a fastener arranged on the movable block. When in use, the magnetic field detection probe is clamped between the fixing block and the fixing plate and fixed by the fastener.

6. The device for measuring the number of turns of an air gap magnetic ring coil according to claim 5, characterized in that: The fixing plate is provided with a stepped hole, which includes a top hole and a bottom hole, the bottom hole is a threaded hole, a cylinder extends outward from the bottom of the movable block, and a through hole is provided on the top of the movable block that passes through the cylinder, the outer contour of the cylinder is adapted to the top hole, and the fastener cooperates with the bottom hole through the through hole.

7. A method for measuring the number of turns of an air gap magnetic ring coil, characterized in that: The method is implemented based on the air gap magnetic ring coil turns measuring device according to any one of claims 1 to 6, and is used to test the air gap magnetic ring coil turns, and the method comprises: The correction air gap magnetic ring coil is arranged on a fixing member, a conductive rod is fixed on a supporting seat, so that the middle part of the conductive rod is located in the correction air gap magnetic ring coil, and a magnetic field detection probe is fixed on the fixing member, so that the magnetic field detection probe is located in the air gap of the correction air gap magnetic ring coil; A first current is passed through the conductive rod, and a second current is passed through the two ends of the secondary side of the correction air gap magnetic ring coil, and it is determined whether the real-time magnetic field intensity value detected by the magnetic field detection probe is zero; If not, the first current or the second current is adjusted so that the real-time magnetic field strength value is zero, and the corresponding first correction current and second correction circuit are determined, and then the measuring device is disassembled and reset; The air gap magnetic ring coil to be tested is arranged on a fixing member, a conductive rod is fixed on a supporting seat, so that the middle part of the conductive rod is located in the air gap magnetic ring coil to be tested, and a magnetic field detection probe is fixed on the fixing member, so that the magnetic field detection probe is located in the air gap of the air gap magnetic ring coil to be tested; The first correction current is passed through the conductive rod, and the second correction current is passed through both ends of the secondary side of the air gap magnetic ring coil to be tested; After a preset time, the value detected by the magnetic field detection probe is recorded as the second magnetic field intensity; The number of turns of the air gap magnetic ring coil to be tested is confirmed according to the comparison table of the second magnetic field strength and the number of magnetic field turns.

8. The device for measuring the number of turns of an air gap magnetic ring coil according to claim 7, characterized in that: The step of setting the correction air gap magnetic ring coil on the fixing member includes: Determine the first current and the second current according to a preset formula, that is, determine a first current value and a first direction corresponding to the first current, and determine a second current value and a second direction corresponding to the second current; The preset formula is: Wherein, H is the magnetic field intensity, the magnitude of I1 is the first current value, the positive and negative of I1 is the first direction, the magnitude of I2 is the second current value, the positive and negative of I2 is the second direction, N1 is the number of turns of the conductive rod, N2 is the number of turns of the air gap magnetic ring coil, here the number of turns of the correction air gap magnetic ring coil is taken, and r is the core diameter of the air gap magnetic ring coil; When determining the first current and the second current, the value of H is 0 and the value of N1 is 1.

9. The device for measuring the number of turns of an air gap magnetic ring coil according to claim 8, characterized in that: The step of determining the first current and the second current according to a preset formula includes: The value of N2 is reduced or increased in sequence, and a plurality of theoretical magnetic field strength values ​​obtained according to the preset formula are determined with other parameters unchanged, and the magnetic field circle number comparison table is determined according to the theoretical magnetic field strength values.

Images