JP6486610B2 - Wire impedance matching device - Google Patents

Description

  The present invention relates to a wire impedance matching device for matching the impedance of each wire of a multi-laying wire.

  Generally, a bus duct or the like is used in a low-voltage and large-capacity electric circuit. Moreover, it may replace with a bus duct and may lay many low voltage | pressure cables (electric wire) from the surface of workability | operativity or cost-saving (for example, refer patent document 1). In this case, the allowable current is calculated on the assumption that the current is distributed evenly over the multiple wires, but in reality, the load current is not evenly distributed over the wires of each line due to the difference in the layout of the electric circuit and the contact resistance. In some cases, the load current concentrates on the wires and flows into an overheated state. This is presumably because impedance variation occurs due to the influence of the contact resistance of each wire laid in multiple lines and the mutual inductance from other lines.

  If an imbalance occurs in the load current flowing through the wires of each line, the current of the specific wire may increase and the wire may burn out. Therefore, even if an imbalance occurs in the load currents of the electric wires of the respective strips, electric wires having a large current capacity are employed so that the electric wires do not burn out.

JP 2002-122627 A

  However, if an electric wire with a large current capacity is adopted, the cost becomes high, and the electric wire becomes thick, so that the installation work becomes difficult. In addition, when the load current increases due to the addition of a load, etc., a wire (strip) with insufficient current capacity will be added to the multi-strip laying wire. In addition to the wires having the same current capacity, wires having different current capacities may be added. Even in such cases, it is necessary to prevent unbalance in the load current flowing through the wires of each line.

  Therefore, the present applicant has developed an application that can suppress the unbalance of the current flowing through each electric wire by matching the impedance of each electric wire so that the current flowing through each electric wire is balanced, and filed as Japanese Patent Application No. 2013-105833. .

As shown in claim 5 of Japanese Patent Application No. 2013-105833, a closed iron core that has a through hole at the center and forms a magnetic circuit by the current of an electric wire that has passed through the through hole is provided. 2, 3, 4,...) Always select at least n−1 combinations including each of the n strips from the combination _n C ₂ of the two strips of wires. Each set is made to penetrate through a through hole of a separate iron core in a direction in which the magnetic fluxes generated by the currents of the two electric wires are canceled out.

  In this Japanese Patent Application No. 2013-105833, two wires are passed through the through-hole of the iron core, and the two wires are passed through in a direction in which the magnetic flux generated by the current of the two wires is canceled out. Two electric wires must be passed through the through-holes of the iron core from opposite directions. Therefore, there is room for improvement in workability.

  An object of the present invention is to provide an electric wire impedance matching device that can suppress an imbalance of currents flowing through each of multiple wires laid and can improve workability.

The wire impedance matching device of the present invention has two through holes when viewed from the side through which the electric wires are penetrated, and the two through holes when electric wires having the same current direction are penetrated from the same direction in the two through holes, respectively. A closed iron core is formed to form a magnetic circuit in which magnetic fluxes generated by the electric currents of the respective electric wires in the holes are canceled out , and the iron core is formed by combining a plurality of constituent members, and n (n = 2, 3) as the electric wires. 4, ...) Always select at least n-1 combinations including the wires of each of the n strips from the combination of the two wires nC2 of the strips of wires, It is characterized by penetrating through a through hole of another iron core for each set in the same direction.

  According to the present invention, the iron core has two through holes when viewed from the side through which the electric wires are penetrated, and even if the two electric wires are penetrated from the same direction, the magnetic fluxes generated by the electric currents of the respective electric wires are canceled out. Thus, a magnetic circuit is formed in which the magnetic fluxes cancel each other even if the two electric wires are not passed through the through-holes of the iron core from opposite directions. Therefore, since two electric wires can be penetrated from the same direction and a magnetic flux can be negated mutually, workability is improved significantly.

And at least n-1 combinations including each wire of n strips are selected from the combination _n C ₂ of two wires of n (n = 2, 3, 4,...) Strips, Since the two selected wires are paired and the direction of the current is passed in the same direction through each core through-hole of another iron core, the impedance of each laid wire can be matched, and the current flowing through each wire Can be suppressed.

Explanatory drawing of Example 1 of the iron core used for the electric wire impedance matching apparatus which concerns on embodiment of this invention. Explanatory drawing of Example 2 of the iron core used for the electric wire impedance matching apparatus which concerns on embodiment of this invention. Explanatory drawing of Example 3 of the iron core used for the wire impedance matching apparatus which concerns on embodiment of this invention. Explanatory drawing of Example 4 of the iron core used for the wire impedance matching apparatus which concerns on embodiment of this invention. The lineblock diagram at the time of applying the electric wire impedance matching device concerning the embodiment of the present invention to the electric circuit which has the 1-phase electric wire. The lineblock diagram at the time of applying the electric wire impedance matching device concerning the embodiment of the present invention to the electric circuit whose 1 phase electric wire is three strips. The lineblock diagram at the time of applying the electric wire impedance matching device concerning the embodiment of the present invention to the electric circuit whose 1 phase electric wire is four strips. The lineblock diagram of other examples at the time of applying the electric wire impedance matching device concerning the embodiment of the present invention to the electric circuit whose 1 phase electric wire is four strips. Explanatory drawing of the imbalance suppression of an electric current at the time of applying the wire impedance matching apparatus which concerns on embodiment of this invention to the electrical circuit whose 1 phase electric wire is 4 articles | strands.

  Embodiments of the present invention will be described below. 1A and 1B are explanatory views of Example 1 of an iron core used in a wire impedance matching device according to an embodiment of the present invention, in which FIG. 1A is a plan view, FIG. 1B is a perspective view, and FIG. c) is a front view.

  In FIG. 1, the iron core 11 has two through holes 12a and 12b when viewed from the side through which the electric wire passes, and the two electric wires 13a and 13b forming a pair are connected to the two through holes 12a and 12b in the direction of current. It penetrates in the same direction. In FIG. 1, the direction of the current flowing through the electric wires 13a and 13b is indicated by arrows.

  The iron core 11 is generated by the electric currents of the electric wires 13a and 13b of the two through holes 12a and 12b when the electric wires 13a and 13b having the same current direction are passed through the two through holes 12a and 12b from the same direction. It is configured to form a magnetic circuit in which magnetic fluxes cancel each other.

  As shown in FIG. 1 (b), the through holes 12a and 12b are formed in a quadrilateral shape when viewed from the side through which the electric wire passes, and the three sides of the through holes 12a and 12b are located on the same plane and the rest One side is three-dimensionally configured to be located on another plane. That is, three sides of the four sides of the through holes 12a and 12b are located on the front side, and the other side is located on the back side. Thereby, the iron core 11 becomes the shape twisted in three dimensions.

  The electric current of the electric wire 13a passing through the through hole 12a generates a magnetic flux in the direction of the arrow Xa in the iron core 11. On the other hand, the electric current of the electric wire 13b penetrating the through hole 12b generates a magnetic flux in the arrow Xb direction in the iron core 11. The magnetic flux in the direction of the arrow Xa and the magnetic flux in the direction of the arrow Xb are magnetic fluxes that cancel each other. This is because the iron core 11 has a twisted shape. The iron core 11 of the first embodiment shown in FIG. 1 is called an L-shaped iron core because the right side shape of the plan view is L-shaped.

  FIG. 2 is an explanatory diagram of Example 2 of the iron core used in the wire impedance matching device according to the embodiment of the present invention, and FIG. 2A is a plan view of an annular member that is a constituent member of the iron core. FIG. 2B is a perspective view of the iron core according to the second embodiment, and FIG. 2C is a plan view of the iron core according to the second embodiment.

  As shown in FIG.2 (b), the iron core 11 is comprised from four semi-annular members 14a-14d. The semi-annular members 14a to 14d are obtained by preparing two annular members 14 shown in FIG. 2A and dividing the two annular members 14 into two.

  Of the four semi-annular members 14a to 14d, the semi-annular members 14a and 14c are connected with the arc side facing up, and the semi-annular members 14b and 14d facing down, and FIG. As shown, the iron core 11 is formed so that the planar shape is a square. That is, the other end of the semi-annular member 14b is connected to one end of the semi-annular member 14a, the other end of the semi-annular member 14c is connected to one end of the semi-annular member 14b, and The other end of the semi-annular member 14d is connected to one end, and the other end of the semi-annular member 14a is connected to one end of the semi-annular member 14d.

  Thereby, the iron core 11 becomes the twisted shape which has the two through-holes 12a and 12b seeing from the side which penetrates an electric wire. Since the shape seen from the direction of the arrow Y1 in FIG. 2C is U-shaped, the iron core 11 of Example 2 is referred to as a U-type iron core.

  As shown in FIG. 2B, the electric current of the electric wire 13 a penetrating through the through hole 12 a generates a magnetic flux in the arrow Xab direction in the iron core 11. On the other hand, the electric current of the electric wire 13b penetrating the through hole 12b generates a magnetic flux in the arrow Xcd direction in the iron core 11. The magnetic flux in the direction of the arrow Xab and the magnetic flux in the direction of the arrow Xcd are magnetic fluxes that cancel each other. This is because the iron core 11 has a twisted shape. As a result, the magnetic fluxes generated by the currents of the respective wires 13a and 13b are canceled out by simply passing through the two wires 13a and 13b forming a pair in the two through holes 12a and 12b in the same direction. .

  FIG. 3 is an explanatory diagram of Example 3 of the iron core used in the wire impedance matching device according to the embodiment of the present invention, and FIG. 3A is a plan view of an annular member that is a constituent member of the iron core. FIG. 3B is a perspective view of the iron core according to the third embodiment, and FIG. 3C is a plan view of the iron core according to the third embodiment. The iron core 11 of the third embodiment is obtained by forming the iron core 11 so that the planar shape is a rhombus with respect to the U-shaped iron core 11 of the second embodiment shown in FIG.

  Two annular members 14 shown in FIG. 3A are prepared, and the two annular members 14 are divided into two to obtain four semi-annular members 14a to 14d. And as shown in FIG.3 (b), among the four semi-annular members 14a-14d, the arc side of the semi-annular members 14a, 14c is turned up, and the arc side of the semi-annular members 14b, 14d is As shown in FIG. 3C, the iron core 11 is formed so that the planar shape is a rhombus.

  That is, the other end of the semi-annular member 14b is connected to one end of the semi-annular member 14a, the other end of the semi-annular member 14c is connected to one end of the semi-annular member 14b, and The other end of the semi-annular member 14d is connected to one end, and the other end of the semi-annular member 14a is connected to one end of the semi-annular member 14d.

  Thereby, the iron core 11 becomes the twisted shape which has the two through-holes 12a and 12b seeing from the side which penetrates an electric wire. Since the shape seen from the direction of the arrow Y2 in FIG. 3C is an ∞ shape, the iron core 11 of Example 3 is referred to as an ∞ type iron core.

  As shown in FIG. 3B, the electric current of the electric wire 13 a penetrating the through hole 12 a generates a magnetic flux in the arrow Xab direction in the iron core 11. On the other hand, the electric current of the electric wire 13b penetrating the through hole 12b generates a magnetic flux in the arrow Xcd direction in the iron core 11. The magnetic flux in the direction of the arrow Xab and the magnetic flux in the direction of the arrow Xcd are magnetic fluxes that cancel each other. This is because the iron core 11 has a twisted shape. As a result, the magnetic fluxes generated by the currents of the respective wires 13a and 13b are canceled out by simply passing through the two wires 13a and 13b forming a pair in the two through holes 12a and 12b in the same direction. .

  FIG. 4 is an explanatory diagram of Example 4 of the iron core used in the wire impedance matching device according to the embodiment of the present invention. FIG. 4A is a front view of the iron core according to Example 4, and FIG. These are the perspective views of the iron core which concerns on Example 4. FIG.

  The iron core 11 according to the fourth embodiment is different from the L-shaped iron core 11 according to the first embodiment shown in FIG. 1 in that three of the four sides of the through holes 12a and 12b are located on different planes. One side is located on the plane on which the three sides of the other through hole are located.

As shown to Fig.4 (a), the through-holes 12a and 12b are formed in a quadrilateral seeing from the side which penetrates an electric wire. Further, as shown in FIG. 4B, three sides of the four sides of the through holes 12a and 12b are located on another same plane, and the other side is located on a plane on which the three sides of the other through hole are located. To do.

  Thereby, when the electric wires 13a and 13b having the same current direction are passed through the two through holes 12a and 12b from the same direction, the magnetic flux generated by the electric currents of the electric wires 13a and 13b of the two through holes 12a and 12b, respectively. Are configured to form magnetic circuits that cancel each other. In FIG. 4, the direction of the current flowing through the electric wires 13a and 13b is indicated by arrows.

  That is, the electric current of the electric wire 13 a penetrating the through hole 12 a generates a magnetic flux in the direction of the arrow Xa in the iron core 11. On the other hand, the electric current of the electric wire 13b penetrating the through hole 12b generates a magnetic flux in the arrow Xb direction in the iron core 11. The magnetic flux in the direction of the arrow Xa and the magnetic flux in the direction of the arrow Xb are magnetic fluxes that cancel each other. The iron core 11 of the fourth embodiment shown in FIG. 4 is called an X-type iron core because the shape where one piece of the through holes 12a and 12b intersects at the center of the plan view is an X shape.

  Thus, the iron core 11 used in the wire impedance matching device according to the embodiment of the present invention has two through-holes when wires having the same current direction are passed through the two through-holes 12a and 12b from the same direction. 12a and 12b are closed iron cores forming a magnetic circuit in which magnetic fluxes generated by the currents of the respective electric wires of the wires 12a and 12b cancel each other.

  Next, the wire impedance matching device according to the embodiment of the present invention will be described. FIG. 5: is a block diagram at the time of applying the electric wire impedance matching apparatus which concerns on embodiment of this invention to the electrical circuit which is 1 line of electric wires.

  The wires 13 from the power source 15 to the load 16 are two wires 13a and 13b, and the wires 13a and 13b have inductances La and Lb and resistors Ra and Rb. The wire impedance matching device uses any one of the iron cores 11 shown in FIGS. That is, when the electric wires 13a and 13b having the same current direction are passed through the two through holes 12a and 12b of the iron core 11ab from the same direction, they are generated by the electric currents of the electric wires 13a and 13b of the two through holes 12a and 12b. Magnetic fluxes canceling each other out.

  The load current I0 from the power supply 15 is divided into a current Ia flowing through the electric wire 13a and a current Ib flowing through the electric wire 13b. In this case, a difference ΔI (= Ia−Ib) is generated between the current Ia flowing through the electric wire 13a and the current Ib flowing through the electric wire 13b due to the influence of the inductances La and Lb and the resistors Ra and Rb of the electric wires 13a and 13b. However, since the magnetic fluxes generated by the currents of the two electric wires 13a and 13b cancel each other, the difference ΔI (= Ia−Ib) finally approaches zero. Therefore, the impedance of each electric wire can be matched so that the currents flowing through the electric wires 13a and 13b are balanced, and the unbalance of the currents Ia and Ib flowing through the electric wires 13a and 13b can be suppressed.

  Next, FIG. 6 is a configuration diagram in the case where the wire impedance matching device according to the embodiment of the present invention is applied to an electric circuit in which a single-phase electric wire has three strips, and FIG. 6A shows two iron cores 11ab, When 11bc is provided, FIG. 6B shows a case where three iron cores 11ab, 11bc, and 11ca are provided.

  In FIG. 6A, the wires 13 from the power source 15 to the load 16 are three wires 13a, 13b, 13c, and the wires 13a, 13b, 13c are inductances La, Lb, Lc, resistors Ra, Rb, Rc. have. The wire impedance matching device includes two iron cores 11ab and 11bc. The iron core 11ab has through holes 12a and 12b, and the iron core 11bc has through holes 12b and 12c.

An electric wire 13a passes through the through hole 12a of the iron core 11ab, and an electric wire 13b passes through the through hole 12b. Similarly, the electric wire 13b penetrates the through hole 12b of the iron core 11bc, and the electric wire 13c penetrates the through hole 12c. Namely, Article 3 of the electric wire 13a, 13b, 2 two combinations of wire _13c, due 3 _{C 2,} and consists of three combinations (13a and 13b, 13b and 13c, 13c and 13a). Of these three combinations (13a and 13b, 13b and 13c, 13c and 13a), two combinations are selected.

  FIG. 6A shows a case where two combinations (13a and 13b, 13b and 13c) are selected. Of the combination of the two selected electric wires, the electric wire 13a is passed through the through hole 12a of the iron core 11ab, the electric wire 13b is passed through the through hole 12b, and similarly, the electric wire 13b is inserted into the through hole 12b of the iron core 11bc. The electric wire 13c is passed through the through hole 12c. The combination of the two electric wires may be a combination of (13a and 13b, 13c and 13a) or (13c and 13a, 13b and 13c) instead of (13a and 13b, 13b and 13c).

  The two electric wires 13a and 13b (13b and 13c) are generated by the electric current of the two electric wires 13a and 13b (13b and 13c) by passing through the through holes 12a and 12b (12b and 12c) of the iron core 11ab (11bc). Magnetic fluxes canceling each other out. The load current I0 from the power supply 15 is divided into a current Ia flowing through the electric wire 13a, a current Ib flowing through the electric wire 13b, and a current Ic flowing through the electric wire 13c. In this case, due to the influence of the inductances La, Lb, Lc of the wires 13a, 13b, 13c, resistors Ra, Rb, Ra, etc., the current Ia flowing through the wire 13a, the current Ib flowing through the wire 13b, and the current Ic flowing through the wire 13c Difference ΔIab (= Ia−Ib) {ΔIca (= Ic−Ia)} is generated, but the magnetic fluxes generated by the currents of the two electric wires 13a and 13b (12a and 12c) cancel each other. = Ia−Ib) {ΔIca (= Ic−Ia)} finally approaches zero. Therefore, the impedance of each electric wire can be matched so that the currents flowing through the electric wires 13a, 13b, and 13c are balanced, and the unbalance of the currents Ia, Ib, and Ic flowing through the electric wires 13a, 13b, and 13c can be suppressed.

  In FIG. 6 (b), the three wires 13a, 13b, 13c from the power source 15 to the load 16 have inductances La, Lb, Lc, resistors Ra, Rb, Rc. The wire impedance matching device includes iron cores 11ab, 11bc, and 11ca. The iron core 11ab has through holes 12a and 12b. The iron core 11bc has through holes 12b and 12c. The iron core 11ca has through holes 12c and 12a. have.

  An electric wire 13a passes through the through hole 12a of the iron core 11ab, and an electric wire 13b passes through the through hole 12b. The electric wire 13b penetrates the through hole 12b of the iron core 11bc, and the electric wire 13c penetrates the through hole 12c. Similarly, the electric wire 13c penetrates the through hole 12c of the iron core 11ca, and the electric wire 13a penetrates the through hole 12a.

  As described above, the combination of the two wires of the three wires 13a, 13b, and 13c is three combinations (13a and 13b, 13b and 13c, and 13c and 13a). In FIG. These three combinations (13a and 13b, 13b and 13c, and 13c and 13a) are selected. The two electric wires 13a, 13b {(13b, 13c), (13a, 13c)} are through holes 12a, 12b {(12b, 12c), (12c, 12a) of the iron core 11ab {(11bc), (11ca)}. }, The magnetic fluxes generated by the currents of the two electric wires 13a, 13b {(13b, 13c), (13c, 13a)} cancel each other.

  The load current I0 from the power supply 15 is divided into a current Ia flowing through the electric wire 13a, a current Ib flowing through the electric wire 13b, and a current Ic flowing through the electric wire 13c. In this case, each of the current Ia flowing through the electric wire 13a, the current Ib flowing through the electric wire 13b, and the current Ic flowing through the electric wire 13c due to the influences of the inductances La, Lb, Lc, the resistors Ra, Rb, Ra, etc. A difference occurs between the two electric wires 13a, 13b {(13b, 13c), (13c, 13a)}, and the magnetic fluxes generated by the currents cancel each other. . Therefore, the impedance of each electric wire can be matched so that the currents flowing through the electric wires 13a, 13b, and 13c are balanced, and the unbalance of the currents Ia, Ib, and Ic flowing through the electric wires 13a, 13b, and 13c can be suppressed.

  FIG. 7 is a configuration diagram in the case where the wire impedance matching device according to the embodiment of the present invention is applied to an electric circuit having four lines of one-phase electric wires. FIG. 7A shows three iron cores 11ab, 11ac, 11ad. When the specific electric wire 13a is made to penetrate the through hole 12a in common, in FIG. 7B, the two electric wires selected in the order of the annular ring are made to penetrate the through holes 12 of the three iron cores 11ab, 11bc, and 11cd. Shows the case.

  In FIG. 7A, the electric wires 13 from the power source 15 to the load 16 are four electric wires 13a, 13b, 13c, 13d, and the electric wires 13a, 13b, 13c, 13d are inductances La, Lb, Lc, Ld, Resistors Ra, Rb, Rc, and Rd are provided. The wire impedance matching device includes three iron cores 11ab, 11ac, and 11ad. The iron core 11ab has through holes 12a and 12b. The iron core 11ac has through holes 12a and 12c. The iron core 11ad has a through hole 12a. , 12d.

  A common electric wire 13a passes through the through hole 12a of the iron core 11ab, and an electric wire 13b passes through the through hole 12b. A common electric wire 13a passes through the through hole 12a of the iron core 11ac, and an electric wire 13c passes through the through hole 12c. Similarly, the common electric wire 13a passes through the through hole 12a of the iron core 11ad, and the electric wire 13d passes through the through hole 12d. That is, the electric wire 13a penetrates through the through hole 12a of the iron core 11ab, the through hole 12a of the iron core 11ac, and the through hole 12a of the iron core 11ad.

Article 4 of the wire 13a, 13b, 13c, 2 two combinations of wire 13d _is the 4 _{C 2,} 6 pieces of the combination (13a and 13b, 13a and 13c, 13a and 13d, 13b and 13c, 13b and 13d, 13c However, FIG. 7A shows a case where three combinations (13a and 13b, 13a and 13c, and 13a and 13d) through which the wire 13a penetrates in common are selected. . The two electric wires 13a, 13b {(13a, 13c), (13a, 13d)} are connected to the through holes 12a, 12b {(12a, 12c), (12a, 12d)}, the magnetic fluxes generated by the currents of the two electric wires 13a, 13b {(13a, 13c), (13a, 13d)} cancel each other.

  The load current I0 from the power source 15 is divided into a current Ia flowing through the electric wire 13a, a current Ib flowing through the electric wire 13b, a current Ic flowing through the electric wire 13c, and a current Id flowing through the electric wire 13d. In this case, due to the influence of the inductances La, Lb, Lc, Ld, resistors Ra, Rb, Rc, Rd of the wires 13a, 13b, 13c, 13d, the current Ia that flows through the wire 13a, the current Ib that flows through the wire 13b, and the wire 13c A difference occurs between the current Ic flowing through the wire Id and the current Id flowing through the wire 13d, but the magnetic fluxes generated by the currents of the two wires 13a, 13b {(13a, 13c), (13a, 13d)} cancel each other. As a result, their difference eventually approaches zero. Therefore, the impedances of the electric wires can be matched so that the currents flowing through the electric wires 13a, 13b, 13c, and 13d are balanced, and the currents Ia, Ib, Ic, and Id flowing through the electric wires 13a, 13b, 13c, and 13d are unbalanced. Can be suppressed.

  In FIG.7 (b), the electric wire 13a penetrates the through-hole 12a of the iron core 11ab, and the electric wire 13b penetrates the through-hole 12b. The electric wire 13b penetrates the through hole 12b of the iron core 11bc, and the electric wire 13c penetrates the through hole 12c. Similarly, the electric wire 13c penetrates the through hole 12c of the iron core 11cd, and the electric wire 13d penetrates the through hole 12d. That is, in the through holes 12a and 12bb of the iron core 11ab, the through holes 12b and 12c of the iron core 11bc, and the through holes 12c and 12d of the iron core 11cd, two electric wires 13a and 13b {(13b and 13c) selected in the order of the ring are provided. , (13c, 13d)} penetrates.

  As described above, the combination of the two wires of the four wires 13a, 13b, 13c, and 13d includes six combinations (13a and 13b, 13a and 13c, 13a and 13d, 13b and 13c, 13b and 13d, and 13c. FIG. 7 (b) shows a case where two electric wires 13a and 13b {(13b, 13c), (13c, 13d)} selected in the order of the ring are selected from among them. ing.

  The two electric wires 13a, 13b {(13b, 13c), (13c, 13d)} are connected to the through holes 12a, 12b {(12b, 12c), (12c, 12d) of the iron core 11ab {(11bc), (11cd)}. }, The magnetic fluxes generated by the currents of the two electric wires 13a, 13b {(13b, 13c), (13c, 13d)} cancel each other, so that the difference between them finally approaches zero. Therefore, the impedances of the electric wires can be matched so that the currents flowing through the electric wires 13a, 13b, 13c, and 13d are balanced, and the currents Ia, Ib, Ic, and Id flowing through the electric wires 13a, 13b, 13c, and 13d are unbalanced. Can be suppressed.

  In the above description, three combinations of two wires common to one wire 13a (13a and 13b, 13a and 13c, 13a and 13d), and three combinations of two wires selected in the order of the ring ( 13a and 13b, 13b and 13c, and 13c and 13d) have been described, but three combinations of two wires including the four wires 13a, 13b, 13c, and 13d must be selected.

  For example, two combinations of the four wires 13a, 13b, 13c, and 13d are six combinations (13a and 13b, 13a and 13c, 13a and 13d, 13b and 13c, 13b and 13d, 13c and Of these, for example, three combinations of two electric wires (13b and 13c, 13b and 13d, and 13c and 13d) do not include the electric wire 13a, so this combination is excluded. Similarly, the combination not including the electric wire 13b (13a and 13c, 13a and 13d, 13c and 13d), the combination not including the electric wire 13c (13a and 13b, 13a and 13d, 13b and 13d), and the electric wire 13d Combinations (13a and 13b, 13a and 13c, and 13b and 13c) that are not included are excluded and not selected.

  In the above description, the case where three combinations of two electric wires are selected has been described. However, instead of the three combinations, four combinations may be selected. FIG. 8: is a block diagram of another example at the time of applying the electric wire impedance matching apparatus which concerns on embodiment of this invention to the electrical circuit whose 1 phase electric wire is 4 strip | lines. FIG. 8 shows a case where four combinations of two electric wires including the four electric wires 13a, 13b, 13c, and 13d are always selected. Four combinations (13a and 13b, 13b and 13c, 13c and 13d, 13d and 13a) of two electric wires selected in the order of the ring are selected.

In this way, the combination of two wires of n (n = 2, 3, 4,...) Is always a combination of at least n−1 pieces including each wire of n items out of _n C _2. Is selected, and the selected two electric wires are assembled into a set, and the iron core 11 shown in FIGS. 1 to 4 is passed through the through-holes of the other iron cores for each set in the same direction of current. As a result, the magnetic fluxes generated by the currents of the two wires cancel each other.

  FIG. 9 is an explanatory diagram of current unbalance suppression when the wire impedance matching device according to the embodiment of the present invention is applied to an electric circuit having four lines of one-phase electric wires. FIG. 9 is a current waveform diagram when the L-type iron core 11 shown in FIG. 1 is used, and FIG. 9B is a current waveform diagram when the wire impedance matching device according to the embodiment of the present invention is not used.

  As shown in FIG. 9 (b), when the wire impedance matching device according to the embodiment of the present invention is not used, the currents flowing through the four wires are shifted in magnitude and phase. When the wire impedance matching device according to the embodiment is used, it can be seen that the current flowing in each of the four wires has almost the same magnitude and phase, and the unbalance of the current flowing in each wire can be suppressed.

  Here, when four wires were arranged in a row for each phase and a current was passed through each wire, almost no current imbalance occurred. This is presumably because the impedance of each of the electric wires 13a to 13d is dominated by the resistance, the reactance is small, and the impedance hardly changed by the change of the reactance due to some electromagnetic induction.

  Therefore, in the embodiment of the present invention, considering that the cause of current imbalance in multi-laying is the influence of slight inductance due to the relationship of the arrangement of each wire, the iron core 11 is generally a common inserted in the power supply. The same function as the mode choke coil (ferrite core) was applied. If the current direction is reversed by reversing the direction of the in-phase current, the magnetic flux cancels out unlike the zero-phase current transformer as in the case of a zero-phase current transformer. This is a function in which magnetic flux is generated and current is suppressed by the core.

  In developing a current balancer iron core having the same function as a ferrite core, it has been found that the inductance is proportional to the cross-sectional area of the iron core 11, so that the cross-sectional area may be increased to increase the leveling accuracy. An iron-type current balancer simply inserts the iron core without connecting the electrical circuit. Normally, the two wires to be inserted are inserted from different directions so that the generated magnetic flux in the iron core cancels each other. However, in the embodiment of the present invention, wires having the same current direction are penetrated from the same direction. The closed iron core 11 forms a magnetic circuit in which the magnetic fluxes generated by the currents of the respective electric wires are canceled each other. Specifically, the iron core 11 shown in FIGS. 1 to 4 was used.

  As a result, since the magnetic fluxes cancel each other simply by passing the electric wires having the same direction of current through the iron core 11 from the same direction, the electric current is balanced, so that the workability of the electric wires is greatly improved. Further, since there is no magnetic flux in the iron core 11, there is almost no loss for excitation. Furthermore, it has high workability and almost no risk of accidents, and can be significantly reduced in weight and size.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 11 ... Iron core, 12 ... Through-hole, 13 ... Electric wire, 14 ... Semi-annular member, 15 ... Power supply, 16 ... Load

Claims (4)

There are two through holes when viewed from the side through which the electric wires are penetrated, and when electric wires having the same direction of current are passed through the two through holes from the same direction, they are generated by the electric currents of the respective electric wires in the two through holes. A closed iron core that forms a magnetic circuit in which magnetic fluxes that cancel each other out,
The through hole of the iron core is formed in a quadrilateral shape when viewed from the side through which the electric wire is penetrated, three sides of the four sides of the through hole are located on the same plane, and the other side is on another plane on the back side. The three-sided of the four sides of the through hole is located on the front side, and the other side is located on the back side, so that the iron core is three-dimensionally formed.
As the electric wire, at least n-1 combinations including n wires are always selected from the combination nC2 of two wires of n (n = 2, 3, 4,...) And selected. An electric wire impedance matching device characterized in that two electric wires are assembled into a set and the current direction is the same in the same direction, and each set is passed through another through hole of the iron core. There are two through holes when viewed from the side through which the electric wires are penetrated, and when electric wires having the same direction of current are passed through the two through holes from the same direction, they are generated by the electric currents of the respective electric wires in the two through holes. A closed iron core that forms a magnetic circuit in which magnetic fluxes that cancel each other out,
The iron core is prepared with four semi-annular members, the arc sides of the two semi-annular members are up, the arc sides of the other two semi-annular members are down, and the arc side is up One end of the first semi-annular member with the arc side down is connected to the other end of the first semi-annular member with the arc side down to one end of the first semi-annular member The second half ring member with the arc side up is connected to the other end of the second half ring member with the arc side up, and the second half ring member with the arc side up The other end of the first semi-annular member with the arc side up is connected to one end of the second semi-annular member with the arc side down. The two through holes are formed under the first semi-annular member with the arc side up and under the first semi-annular member with the arc side down. The second one between the top and the arc side up The lower the arc side of the annular member are formed between the top of the two eyes of the semi-annular member in the lower,
As the electric wire, at least n-1 combinations including n wires are always selected from the combination nC2 of two wires of n (n = 2, 3, 4,...) And selected. An electric wire impedance matching device characterized in that two electric wires are assembled into a set and the current direction is the same in the same direction, and each set is passed through another through hole of the iron core. The combination of two wires selected from the combination nC2 of the two wires n (n = 2, 3, 4,...) always includes the wires of each of the n items, and the first to nth items. The wire impedance matching device according to claim 1 or 2 , wherein the wire impedance matching device includes two wires of n-1 or n combinations in which two wires are selected in the order of the ring. The combination of two wires selected from the combination nC2 of the two wires n (n = 2, 3, 4,...) always includes the wires of each of the n items, and the first to nth items. The wire impedance matching device according to claim 1 , wherein the wire impedance matching device is an n−1 combination of two wires in which the wires of any of the above items are selected in common.

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