Printed circuit board Rogowski coil adjacent conductor interference resistance wire turn device and design method

Abstract

The invention discloses a printed circuit board Rogowski coil adjacent conductor interference resisting wire turn device and a design method. A boss of a printed circuit board forms a Rogowski coil by arranging wire turns; a third group of wire turns is arranged between the left boss and the right boss, and the winding direction of the third group of wire turns is opposite to that of the first group of wire turns; the winding direction of the third group of wire turns is the same as that of the second group of wire turns; the third group of wire turns comprises a first section of wire turn, a second section of wire turn and a third section of wire turn; the number of turns of the first section of wire turn is 1, the number of turns of the second section of wire turn and the number of turns of the third section of wire turn are equal and are both smaller than or equal to # imgabs0 #, and the second section of wire turn and the third section of wire turn are symmetrically arranged on the two sides of the first section of wire turn; wherein k is the number of turns of the first group of wire turns and is a positive odd number greater than or equal to 3; and during arrangement, the first section of wire turn is aligned with a circle of wire turn in the middle of the first group of wire turns. Mutual inductance between the adjacent conductors and the whole Rogowski coil is reduced, and therefore the Rogowski coil can resist interference of the adjacent conductors.

Description

Technical Field

[0001] The invention belongs to the technical field of current measuring equipment, and relates to a Rogowski coil turn device for a printed circuit board to resist interference from adjacent conductors and a design method. Background Art

[0002] High-power press-fit insulated gate bipolar transistors (IGBTs) are core components of flexible DC transmission equipment such as modular multilevel converters and high-voltage DC circuit breakers. The operating reliability of IGBTs directly affects the safety of power equipment. In press-fit IGBTs, the current sharing and aging characteristics of a large number of parallel chips are key issues that have received widespread attention for their operating reliability.

[0003] The printed circuit board Rogowski coil (PCBRC) is used as an intuitive detection method for the current sharing and aging characteristics of IGBT multi-chips by measuring the didt during the on-off transient process. However, the current-carrying conductors of the press-fit IGBT chip are highly adjacent, and the magnetic field interference of the adjacent conductors on the RC must be carefully considered. The prior art proposes an anti-interference method for designing tighter windings at the corners of the rectangular coil, but its optimization design principle has not been revealed, lacks specific design standards, and the tighter windings at the corners are limited by the corner space and do not have good universality. Similar problems exist for current measurement of ball grid array (BGA) packaged devices such as field programmable gate array test boards. However, since the current is at the milliampere level, the measurement results naturally show an acceptable shielding effect on the stray field caused by adjacent balls or power supplies. In contrast, in high-power arc furnaces, the current borne by multi-branch conductors can reach hundreds of kiloamperes (300kA). The distance between parallel conductors can be as large as 160mm, which provides a wider space for structural parameter design. Thanks to various possibilities and the optimized design of RC structure parameters, the magnetic field interference of adjacent conductors to RC can also be reduced to a fairly low level. In press-fit IGBTs, the measurement current in parallel chips is much larger than that in BGA packaged devices, and the distance between parallel adjacent conductors is much smaller than that in high-power arc furnaces. Therefore, the magnetic field interference of adjacent conductors to RC cannot be naturally accepted. The RC parameter design method in high-power arc furnaces is also not suitable for transient current measurement of parallel chips in press-fit IGBTs. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device and design method, which reduces the mutual inductance between the adjacent conductors and the Rogowski coil as a whole, thereby realizing the Rogowski coil anti-adjacent conductor interference.

[0005] The present invention adopts the following technical solution.

[0006] The present invention provides a Rogowski coil anti-interference wire turn device for a printed circuit board. The Rogowski coil is formed by arranging wire turns on a boss of the printed circuit board. In the adjacent left boss and right boss, the inner side of the left boss faces the inner side of the right boss, and the inner sides of the left boss and the right boss are both arranged with a first group of wire turns, and the remaining three sides of the left boss and the remaining three sides of the right boss are both arranged with a second group of wire turns, and the winding direction of the first group of wire turns is opposite to the winding direction of the second group of wire turns.

[0007] A third group of turns is arranged between the left boss and the right boss, and the winding direction of the third group of turns is opposite to that of the first group of turns; and the winding direction of the third group of turns is the same as that of the second group of turns;

[0008] The third group of turns includes the first section of turns, the second section of turns, and the third section of turns; the number of turns of the first section of turns is 1, and the number of turns of the second section of turns and the third section of turns is equal and less than or equal to The second segment of wire turns and the third segment of wire turns are symmetrically arranged on both sides of the first segment of wire turns; wherein k is the number of turns of the first group of wire turns, which is a positive odd number greater than or equal to 3;

[0009] When arranging, the first section of wire turns is aligned with the circle of wire turns in the middle of the first group of wire turns.

[0010] Preferably, the distance between the third group of turns and the first group of turns in the right boss is greater than the distance between the third group of turns and the first group of turns in the left boss;

[0011] Alternatively, the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss.

[0012] Preferably, the first group of turns, the second group of turns and the third group of turns all include a plurality of inner through holes and outer through holes, the direction of the current in the outer through holes is from bottom to top, and the direction of the current in the inner through holes is from top to bottom.

[0013] The present invention also proposes a design method for a printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device, comprising:

[0014] Step 1, obtaining specification parameters of the first group of turns and the second group of turns in the Rogowski coil; wherein the specification parameters of the turns include: the number of turns k, the winding direction, the distance between the inner through hole and the outer through hole, and the height of the inner through hole and the outer through hole;

[0015] Step 2, a third group of turns is arranged between the left boss and the right boss, the winding direction of the third group of turns is opposite to the winding direction of the first group of turns; the winding direction of the third group of turns is the same as the winding direction of the second group of turns;

[0016] Step 3, with the goal of minimizing the interference mutual inductance of the Rogowski coil when adjacent conductors are energized, determine the design parameters of the third group of turns, the design parameters of the third group of turns including: the number of turns and the spatial position of each turn.

[0017] Preferably, in step 2, a third group of turns is arranged between the left boss and the right boss, including:

[0018] Alternatively, the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss.

[0019] Preferably, step 3 comprises:

[0020] Step 3.1, divide the third group of turns into the first section of turns, the second section of turns, and the third section of turns; the number of turns of the first section of turns is 1, and the number of turns of the second section of turns and the third section of turns is equal and less than or equal to The second section of wire turns and the third section of wire turns are symmetrically arranged on both sides of the first section of wire turns; wherein k is the number of turns of the first group of wire turns, which is a positive odd number greater than or equal to 3.

[0021] Preferably, step 3 also includes:

[0022] Step 3.2, align the first section of turns with the turn in the middle of the first group of turns, and then calculate the first mutual inductance ΔM ( 1 ), record the first interference mutual inductance ΔM( 1 ) The number of turns of the first segment and the spatial position of the turns are used as the first set of design parameters G1 of the third set of turns; wherein the middle turn of the first set of turns is numbered l,

[0023] Step 3.3, select a circle of turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected circle of turns, and at the same time, select a circle of turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected circle of turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the circle of turns in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the second group of design parameters G2 of the third group of turns; calculate the second mutual interference ΔM( 2 ), and from multiple second interference mutual inductances ΔM( 2 ) to extract the second minimum value of mutual inductance minΔM( 2);

[0024] When minΔM( 2 ) is greater than ΔM( 1 ), output the first set of design parameters G1 of the third set of turns, and go to step 3.8;

[0025] When minΔM (2) No more than ΔM (1) When , go to step 3.4;

[0026] Step 3.4, using the first set of design parameters G1 and the second set of design parameters G2 of the third set of turns as the third set of design parameters G3 of the third set of turns, respectively calculate the third mutual interference inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the third set of design parameters (3) and the mutual inductance ΔM from multiple third interference (3) Extract the minimum value of the third interference mutual inductance minΔM( 3 );

[0027] When minΔM( 3 ) is greater than minΔM( 2 ), the second set of design parameters of the third set of turns are outputted with minΔM (2) Corresponding design parameter G2 min , and proceed to step 3.8;

[0028] When minΔM( 3 ) is not greater than minΔM( 2 ), go to step 3.5;

[0029] Step 3.5, select two turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected two turns, and at the same time, select two turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected two turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the turn in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the fourth group of design parameters G4 of the third group of turns; calculate the fourth mutual interference ΔM( 4 ), and from multiple 4th interference mutual inductance ΔM( 4 ) to extract the minimum value of the fourth mutual inductance minΔM( 4 );

[0030] When minΔM( 4 ) is greater than minΔM( 3), the third set of design parameters of the third set of turns are outputted with minΔM (3) Corresponding design parameter G3 min , and proceed to step 3.8;

[0031] When minΔM( 4 ) is not greater than minΔM( 3 ), go to step 3.6;

[0032] Wherein, two turns are selected from the turns numbered 1, 2, ..., 1-1 in the first group of turns, including selecting two adjacent turns and two non-adjacent turns.

[0033] Step 3.6, using the first set of design parameters G1 and the fourth set of design parameters G4 of the third set of turns as the fifth set of design parameters G5 of the third set of turns, respectively calculate the interference mutual inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the fifth set of design parameters (5) and the mutual inductance ΔM from multiple 5th interference (5) Extract the minimum value of the fifth mutual inductance minΔM( 5 );

[0034] When minΔM (5) Greater than minΔM (4) When the fourth set of design parameters of the third set of turns is output, the minΔM (4) Corresponding design parameter G4 min , and proceed to step 3.8;

[0035] When minΔM( 5 ) is not greater than minΔM( 4 ), go to step 3.7;

[0036] Step 3.7, increasing the number of turns w selected from the turns numbered 1, 2, ..., l-1 in the first group of turns and the number of turns w selected from the turns numbered l+1, l+2, ..., k in the first group of turns by a step of 1, repeating steps 3.5 and 3.6 to obtain the design parameters corresponding to the minimum value of the mutual inductance in each group of design parameters of the third group of turns, and proceeding to step 3.8;

[0037] Step 3.8, using the output design parameters as the design parameters of the third group of turns.

[0038] Preferably, the interference mutual inductance of the adjacent conductors to the Rogowski coil when they are energized is calculated using the following relationship:

[0039]

[0040] Where ΔM is the mutual inductance of the adjacent conductors when they are energized; n is the total number of internal and external through holes in the Rogowski coil, which is the sum of the number of internal and external through holes in the first group of turns and the number of internal and external through holes in the second group of turns; M i is the mutual inductance between the adjacent conductor and the i-th through hole in the Rogowski coil, M Q1 is the mutual inductance between the adjacent conductor and the first turn, M Q2 is the mutual inductance between the adjacent conductor and the second turn, M Q3 is the mutual inductance between the adjacent conductor and the third segment of wire turns that is powered;

[0041] In each step, according to the design parameters corresponding to the minimum value of the interference mutual inductance in each group of design parameters of the third group of turns, the number of inner and outer through holes of the first group of turns, the number of inner and outer through holes of the second group of turns, the mutual inductance value between the adjacent conductors that are energized and the first section of turns, the mutual inductance value between the adjacent conductors that are energized and the second section of turns, and the mutual inductance value between the adjacent conductors that are energized and the third section of turns are determined respectively.

[0042] A terminal comprises a processor and a storage medium; the storage medium is used to store instructions; the processor is used to operate according to the instructions to execute the steps of the method.

[0043] A computer-readable storage medium stores a computer program, which implements the steps of the method when executed by a processor.

[0044] The beneficial effects of the present invention are that, compared with the prior art, at least the method proposed by the present invention realizes the optimized arrangement of the number of turns of the anti-interference printed circuit board Rogowski coil, and generates a reverse mutual inductance by setting the counter-winding balance turns to offset the mutual inductance between the adjacent conductor and the positive winding turns, thereby greatly reducing the mutual inductance between the adjacent conductor and the Rogowski coil, thereby reducing the influence of parallel magnetic field interference. By this method, the magnetic interference of adjacent conductors can be reduced to 0.56%. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of the effect of the parallel interference magnetic field generated by the equivalent adjacent conductors on the rectangular Rogowski coil in an embodiment of the present invention; Figure 1 In (b) and (c) are the numbers of the measured boss on the left and the measured boss on the right, respectively, and S1 and S2 are the first group of turns and the second group of turns, respectively;

[0046] Figure 2 is a schematic diagram of the arrangement of the third group of turns in an embodiment of the present invention;

[0047] Figure 3 It is a flowchart of solving the design parameters of the third group of turns in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0049] The convex platform of the printed circuit board is provided with a Rogowski coil by arranging turns of wires. The Rogowski coil includes but is not limited to a rectangular Rogowski coil, such as Figure 1 As shown, in the adjacent left and right bosses, the left side is the boss with position number (b), and the right side is the boss with position number (c), the inner side of the left boss faces the inner side of the right boss, and the inner side of the left boss and the inner side of the right boss are both arranged with the first group of turns S1, and the remaining three sides of the left boss and the remaining three sides of the right boss are both arranged with the second group of turns S2, and the winding direction of the first group of turns is opposite to that of the second group of turns. In a non-limiting preferred embodiment, as Figure 1 and 2 As shown, the two measured bosses are equivalent adjacent conductors.

[0050] According to the right-hand rule, the equivalent adjacent conductors will form a circle around the conductor. Figure 1 The concentric magnetic field lines shown in the figure have a tangent direction to the concentric circles. Therefore, the direction of the magnetic flux generated by the equivalent adjacent conductors in the first group of turns S1 is opposite to the direction of the magnetic flux generated in the second group of turns S2. Figure 1 The magnitude of the magnetic flux generated by the adjacent conductor (one measured boss) in the rectangular Rogowski coil (the other measured boss) is Ψ S1 -Ψ S2 To reduce the interference magnetic field effect of adjacent conductors in the rectangular Rogowski coil, it is necessary to make Ψ S1 -Ψ S2 The value of is close to 0. Figure 1 From the magnetic density cloud diagram in the figure, it can be seen that for the area outside any boss, the closer the distance to another boss is, the greater the magnetic induction intensity B is, and the greater the influence of magnetic field interference is, satisfying Ψ S1 >Ψ S2 , therefore, by reducing Figure 1 The interfering magnetic field can be reduced by reducing the number of turns of the first group of turns or increasing the number of turns of the second group of turns. However, both methods will significantly affect the symmetry of the rectangular Rogowski coil and the transfer parameters between the conductor under test and the rectangular Rogowski coil.

[0051] Therefore, the present invention provides a printed circuit board Rogowski coil anti-interference adjacent conductor turn device, such as Figure 1and 2 As shown, including:

[0052] A third group of turns S3 is arranged between the left boss and the right boss, the winding direction of the third group of turns S3 is opposite to that of the first group of turns S1, and the winding direction of the third group of turns S3 is the same as that of the second group of turns S2; wherein the distance between the third group of turns and the first group of turns in the right boss is greater than the distance between the third group of turns and the first group of turns in the left boss, or the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss;

[0053] The present invention proposes a method of arranging a counter-winding balance wire turn beside the left boss or the right boss. Since the winding direction of the third group of wire turns is opposite to that of the first group of wire turns, a Ψ S1 The magnetic flux Ψ in the opposite direction S3 To make the total magnetic flux approximately equal to 0, so that the magnetic flux generated by the adjacent conductor in the Rogowski coil is approximately 0, in a non-limiting preferred embodiment, the counter-wound balance turns are Figure 2 The third group of turns S3 in the right side of the convex platform is a rectangular Rogowski coil with counter-wound balance turns. At this time, the total magnetic flux generated by the adjacent conductors in the Rogowski coil is Ψ S1 -Ψ S2 -Ψ S3 , by reasonably setting the number of turns and spatial position of the third group of turns to change Ψ S3 The size of the total magnetic flux is close to 0. Figure 2 When the adjacent conductors shown are energized, the mutual inductance of the interference to the Rogowski coil is ΔM = M S1 -M S2 -M S3 .

[0054] The third group of turns includes a first section of turns Q1, a second section of turns Q2, and a third section of turns Q3; the number of turns of the first section is 1, and the number of turns of the second section and the third section is equal and less than or equal to The second section of wire turns and the third section of wire turns are symmetrically arranged on both sides of the first section of wire turns; wherein the number of turns of the first group of wire turns is k, and k is a positive odd number greater than or equal to 3; when arranged, the first section of wire turns is aligned with a circle of wire turns in the middle of the first group of wire turns.

[0055] In order to ensure the symmetry of the arrangement of the number of turns, the present invention proposes to divide the third group of turns into the following Figure 2 The three parts shown are the first section of wire turns Q1, the second section of wire turns Q2, and the third section of wire turns Q3; the turns in the first group of wire turns are numbered 1, 2, ..., k in sequence, and the middle turn of the first group of wire turns is numbered l, The first section of turns Q1 is aligned with the lth turn of the first group of turns.

[0056] The first group of turns, the second group of turns and the third group of turns each include a plurality of inner through holes and outer through holes, Figure 1 and Figure 2 The hollow circle in the figure represents the inner through hole, and the hollow circle represents the outer through hole. The direction of the current i in the outer through hole is from bottom to top, and the direction of the current i in the inner through hole is from top to bottom.

[0057] The counter-wound balancing turns proposed by the present invention do not affect the symmetry of the rectangular Rogowski coil, nor do they change the transfer parameters between the conductor to be measured and the rectangular Rogowski coil.

[0058] The present invention also provides a design method for a printed circuit board Rogowski coil anti-interference wire turn device, such as Figure 3 As shown, including:

[0059] Step 1, obtaining specification parameters of the first group of turns and the second group of turns in the Rogowski coil;

[0060] The specification parameters of the wire turns include but are not limited to: the number of wire turns k, the winding direction, the distance between the inner through hole and the outer through hole, and the height of the inner through hole and the outer through hole.

[0061] In a non-limiting preferred embodiment, the specification parameters of the turns are determined according to the size parameters of the internal bosses of the crimp-type IGBT.

[0062] Step 2, a third group of turns is arranged between the left boss and the right boss, the winding direction of the third group of turns is opposite to the winding direction of the first group of turns; the winding direction of the third group of turns is the same as the winding direction of the second group of turns;

[0063] Among them, the distance between the third group of turns and the first group of turns in the right boss is greater than the distance between the third group of turns and the first group of turns in the left boss, or the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss.

[0064] Step 3, with the goal of minimizing the interference mutual inductance of the Rogowski coil when adjacent conductors are energized, determine the design parameters of the third group of turns, the design parameters of the third group of turns including: the number of turns and the spatial position of each turn.

[0065] Specifically, step 3 includes:

[0066] Step 3.1, divide the third group of turns into the first section of turns, the second section of turns, and the third section of turns; the number of turns of the first section of turns is 1, and the number of turns of the second section of turns and the third section of turns is equal and less than or equal to The second segment of wire turns and the third segment of wire turns are symmetrically arranged on both sides of the first segment of wire turns; wherein k is the number of turns of the first group of wire turns, which is a positive odd number greater than or equal to 3;

[0067] Step 3.2, align the first section of turns with the turn in the middle of the first group of turns, and then calculate the first mutual inductance ΔM ( 1 ), record the first interference mutual inductance ΔM( 1 ) The number of turns of the first segment and the spatial position of the turns are used as the first set of design parameters G1 of the third set of turns; wherein the middle turn of the first set of turns is numbered l,

[0068] Specifically, during arrangement, the first section of wire turns is directly opposite to a circle of wire turns in the middle of the first group of wire turns.

[0069] Step 3.3, select a circle of turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected circle of turns, and at the same time, select a circle of turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected circle of turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the circle of turns in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the second group of design parameters G2 of the third group of turns; calculate the second mutual interference ΔM( 2 ), and from multiple second interference mutual inductances ΔM( 2 ) to extract the second minimum value of mutual inductance minΔM( 2 );

[0070] When minΔM( 2 ) is greater than ΔM( 1 ), output the first set of design parameters G1 of the third set of turns, and go to step 3.8;

[0071] When minΔM( 2 ) is not greater than ΔM( 1 ), go to step 3.4;

[0072] Step 3.4, using the first set of design parameters G1 and the second set of design parameters G2 of the third set of turns as the third set of design parameters G3 of the third set of turns, respectively calculate the third mutual interference inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the third set of design parameters (3) and the mutual inductance ΔM from multiple third interference (3) Extract the minimum value of the third interference mutual inductance minΔM( 3 );

[0073] When minΔM( 3 ) is greater than minΔM(2 ), the second set of design parameters of the third set of turns are outputted with minΔM (2) Corresponding design parameter G2 min , and proceed to step 3.8;

[0074] When minΔM( 3 ) is not greater than minΔM( 2 ), go to step 3.5;

[0075] Step 3.5, select two turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected two turns, and at the same time, select two turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected two turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the turn in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the fourth group of design parameters G4 of the third group of turns; calculate the fourth mutual interference ΔM( 4 ), and from multiple 4th interference mutual inductance ΔM( 4 ) to extract the minimum value of the fourth mutual inductance minΔM( 4 );

[0076] When minΔM( 4 ) is greater than minΔM( 3 ), the third set of design parameters of the third set of turns are outputted with minΔM (3) Corresponding design parameter G3 min , and proceed to step 3.8;

[0077] When minΔM( 4 ) is not greater than minΔM( 3 ), go to step 3.6;

[0078] Wherein, two turns are selected from the turns numbered 1, 2, ..., 1-1 in the first group of turns, including selecting two adjacent turns and two non-adjacent turns.

[0079] Step 3.6, using the first set of design parameters G1 and the fourth set of design parameters G4 of the third set of turns as the fifth set of design parameters G5 of the third set of turns, respectively calculate the interference mutual inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the fifth set of design parameters (5) and the mutual inductance ΔM from multiple 5th interference (5) Extract the minimum value of the fifth mutual inductance minΔM( 5 );

[0080] When minΔM( 5 ) is greater than minΔM( 4 ), the fourth set of design parameters of the third set of turns are outputted with minΔM (4) Corresponding design parameter G4 min , and proceed to step 3.8;

[0081] When minΔM( 5 ) is not greater than minΔM( 4 ), go to step 3.7;

[0082] Step 3.7, increasing the number of turns w selected from the turns numbered 1, 2, ..., l-1 in the first group of turns and the number of turns w selected from the turns numbered l+1, l+2, ..., k in the first group of turns by a step of 1, repeating steps 3.5 and 3.6 to obtain the design parameters corresponding to the minimum value of the mutual inductance in each group of design parameters of the third group of turns, and proceeding to step 3.8;

[0083] Step 3.8, using the output design parameters as the design parameters of the third group of turns.

[0084] In the embodiment, the mutual inductance of interference to the Rogowski coil when adjacent conductors are energized is calculated using the following relationship:

[0085]

[0086] Where ΔM is the mutual inductance of the adjacent conductors when they are energized; n is the total number of internal and external through holes in the Rogowski coil, which is the sum of the number of internal and external through holes in the first group of turns and the number of internal and external through holes in the second group of turns; M i is the mutual inductance between the adjacent conductor and the i-th through hole in the Rogowski coil, M Q1 is the mutual inductance between the adjacent conductor and the first turn, M Q2 is the mutual inductance between the adjacent conductor and the second turn, M Q3 is the mutual inductance between the adjacent conductor and the third segment of wire turns that is powered;

[0087] In steps 3.2 to 3.7, the number of inner and outer through holes of the first group of turns, the number of inner and outer through holes of the second group of turns, the mutual inductance value between the adjacent conductors that are energized and the first section of turns, the mutual inductance value between the adjacent conductors that are energized and the second section of turns, and the mutual inductance value between the adjacent conductors that are energized and the third section of turns are determined respectively according to the design parameters corresponding to the minimum value of the interference mutual inductance in each group of design parameters of the third group of turns.

[0088] The program flowchart for solving the design parameters of the third group of turns by implementing the contents of step 3 in a programmatic manner is as follows: Figure 3 shown.

[0089] The present disclosure may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0090] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0091] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0092] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A Rogowski coil device for resisting interference from adjacent conductors on a printed circuit board, wherein the Rogowski coil is formed by arranging turns on the boss of the printed circuit board; in the adjacent left boss and right boss, the inner side of the left boss faces the inner side of the right boss, and the inner side of the left boss and the inner side of the right boss are both arranged with a first group of turns, and the remaining three sides of the left boss and the remaining three sides of the right boss are both arranged with a second group of turns, and the winding direction of the first group of turns is opposite to the winding direction of the second group of turns; characterized in that: A third group of turns is arranged between the left boss and the right boss, and the winding direction of the third group of turns is opposite to that of the first group of turns; and the winding direction of the third group of turns is the same as that of the second group of turns; The third group of turns includes the first section of turns, the second section of turns, and the third section of turns; the number of turns of the first section of turns is 1, and the number of turns of the second section of turns and the third section of turns is equal and less than or equal to The second segment of wire turns and the third segment of wire turns are symmetrically arranged on both sides of the first segment of wire turns; wherein k is the number of turns of the first group of wire turns, which is a positive odd number greater than or equal to 3; When arranging, the first section of wire turns is aligned with the circle of wire turns in the middle of the first group of wire turns.

2. The printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 1, characterized in that: The distance between the third group of turns and the first group of turns in the right boss is greater than the distance between the third group of turns and the first group of turns in the left boss; Alternatively, the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss.

3. The printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 1, characterized in that: The first group of turns, the second group of turns and the third group of turns all include a plurality of inner through holes and outer through holes. The direction of the current in the outer through holes is from bottom to top, and the direction of the current in the inner through holes is from top to bottom.

4. A design method for a Rogowski coil turn device for a printed circuit board to prevent interference from adjacent conductors, characterized in that: include: Step 1, obtaining specification parameters of the first group of turns and the second group of turns in the Rogowski coil; wherein the specification parameters of the turns include: the number of turns k, the winding direction, the distance between the inner through hole and the outer through hole, and the height of the inner through hole and the outer through hole; Step 2, a third group of turns is arranged between the left boss and the right boss, the winding direction of the third group of turns is opposite to the winding direction of the first group of turns; the winding direction of the third group of turns is the same as the winding direction of the second group of turns; Step 3, with the goal of minimizing the interference mutual inductance of the Rogowski coil when adjacent conductors are energized, determine the design parameters of the third group of turns, the design parameters of the third group of turns including: the number of turns and the spatial position of each turn.

5. The design method of the printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 4 is characterized in that: In step 2, a third group of turns is arranged between the left boss and the right boss, including: Alternatively, the distance between the third group of turns and the first group of turns in the left boss is greater than the distance between the third group of turns and the first group of turns in the right boss.

6. The design method of the printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 5, characterized in that: Step 3 includes: Step 3.1, divide the third group of turns into the first section of turns, the second section of turns, and the third section of turns; the number of turns of the first section of turns is 1, and the number of turns of the second section of turns and the third section of turns is equal and less than or equal to The second section of wire turns and the third section of wire turns are symmetrically arranged on both sides of the first section of wire turns; wherein k is the number of turns of the first group of wire turns, which is a positive odd number greater than or equal to 3.

7. The design method of the printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 6, characterized in that: Step 3 also includes: Step 3.2, align the first section of turns with the turn in the middle of the first group of turns, and then calculate the first mutual inductance ΔM ( 1 ), record the first interference mutual inductance ΔM( 1 ) The number of turns of the first segment and the spatial position of the turns are used as the first set of design parameters G1 of the third set of turns; wherein the middle turn of the first set of turns is numbered l, Step 3.3, select a circle of turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected circle of turns, and at the same time, select a circle of turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected circle of turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the circle of turns in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the second group of design parameters G2 of the third group of turns; calculate the second mutual interference ΔM( 2 ), and from multiple second interference mutual inductances ΔM( 2 ) to extract the second minimum value of mutual inductance minΔM( 2 ); When minΔM( 2 ) is greater than ΔM( 1 ), output the first set of design parameters G1 of the third set of turns, and go to step 3.8; When minΔM( 2 ) is not greater than ΔM( 1 ), go to step 3.4; Step 3.4, using the first set of design parameters G1 and the second set of design parameters G2 of the third set of turns as the third set of design parameters G3 of the third set of turns, respectively calculate the third mutual interference inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the third set of design parameters (3) and the mutual inductance ΔM from multiple third interference (3) Extract the minimum value of the third interference mutual inductance minΔM( 3 ); When minΔM( 3 ) is greater than minΔM( 2 ), the second set of design parameters of the third set of turns are outputted with minΔM (2) Corresponding design parameter G2 min , and proceed to step 3.8; When minΔM( 3 ) is not greater than minΔM( 2 ), go to step 3.5; Step 3.5, select two turns from the turns numbered 1, 2, ..., l-1 in the first group of turns, align the second section of turns with the selected two turns, and at the same time, select two turns from the turns numbered l+1, l+2, ..., k in the first group of turns, align the third section of turns with the selected two turns, wherein the aligned second section of turns and the third section of turns are symmetrically arranged with the turn in the middle of the first group of turns as the center, record the number of turns of the second section of turns and the spatial position of the turns, and the number of turns of the third section of turns and the spatial position of the turns under different turn selection methods as the fourth group of design parameters G4 of the third group of turns; calculate the fourth mutual interference ΔM( 4 ), and from multiple 4th interference mutual inductance ΔM( 4 ) to extract the minimum value of the fourth mutual inductance minΔM( 4 ); When minΔM( 4 ) is greater than minΔM( 3 ), the third set of design parameters of the third set of turns are outputted with minΔM (3) Corresponding design parameter G3 min , and proceed to step 3.8; When minΔM (4) No more than minΔM (3) When , go to step 3.6; Wherein, two turns are selected from the turns numbered 1, 2, ..., 1-1 in the first group of turns, including selecting two adjacent turns and two non-adjacent turns. Step 3.6, using the first set of design parameters G1 and the fourth set of design parameters G4 of the third set of turns as the fifth set of design parameters G5 of the third set of turns, respectively calculate the interference mutual inductance ΔM of the Rogowski coil when the adjacent conductors are energized under the fifth set of design parameters (5) and the mutual inductance ΔM from multiple 5th interference (5) Extract the minimum value of the fifth mutual inductance minΔM( 5 ); When minΔM( 5 ) is greater than minΔM( 4 ), the fourth set of design parameters of the third set of turns are outputted with minΔM (4) Corresponding design parameter G4 min , and proceed to step 3.8; When minΔM( 5 ) is not greater than minΔM( 4 ), go to step 3.7; Step 3.7, increasing the number of turns w selected from the turns numbered 1, 2, ..., l-1 in the first group of turns and the number of turns w selected from the turns numbered l+1, l+2, ..., k in the first group of turns by a step of 1, repeating steps 3.5 and 3.6 to obtain the design parameters corresponding to the minimum value of the mutual inductance in each group of design parameters of the third group of turns, and proceeding to step 3.8; Step 3.8, using the output design parameters as the design parameters of the third group of turns.

8. The design method of the printed circuit board Rogowski coil anti-adjacent conductor interference wire turn device according to claim 7, characterized in that: The mutual inductance of the interference to the Rogowski coil when the adjacent conductor is energized is calculated using the following relationship: Where ΔM is the mutual inductance of the adjacent conductors when they are energized; n is the total number of internal and external through holes in the Rogowski coil, which is the sum of the number of internal and external through holes in the first group of turns and the number of internal and external through holes in the second group of turns; M i is the mutual inductance between the adjacent conductor and the i-th through hole in the Rogowski coil, M Q1 is the mutual inductance between the adjacent conductor and the first turn, M Q2 is the mutual inductance between the adjacent conductor and the second turn, M Q3 is the mutual inductance between the adjacent conductor and the third segment of wire turns that is powered; In each step, according to the design parameters corresponding to the minimum value of the interference mutual inductance in each group of design parameters of the third group of turns, the number of inner and outer through holes of the first group of turns, the number of inner and outer through holes of the second group of turns, the mutual inductance value between the adjacent conductors that are energized and the first section of turns, the mutual inductance value between the adjacent conductors that are energized and the second section of turns, and the mutual inductance value between the adjacent conductors that are energized and the third section of turns are determined respectively.

9. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 4 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 4 to 8 are implemented.

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