JP2012119617A - Reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor in which a yoke contains a gap, with a reduced loss, with no increase in size.SOLUTION: A reactor 1 includes a loop-like yoke 2 provided with a first magnetic leg 2a and a second magnetic leg 2b containing a gap respectively, and a first coil 4 and a second coil 5 of multilayer winding which are arranged to enclose the first magnetic leg 2a or the second magnetic leg 2b respectively. A first layer winding of the first coil 4 and a second layer winding of the second coil 5 are connected in series for inter-coil connection. A second layer winding of the first coil 4 and a first layer winding of the second coil 5 are connected in series for inter-coil connection. An end part on such side as no inter-coil connection is made, at the first layer and second layer windings of the first coil 4, is subjected to interlayer connection, which acts as a connection part to an external electric circuit. The first layer and second layer windings of the first coil 4 are bale-piled, and the first layer and second layer windings of the second coil 5 are bale-piled.

Description

  The present invention relates to a reactor having a gap in a yoke that is connected to or incorporated in a power converter.

  The reactor connected or incorporated in the power converter is used to connect the power converter to a voltage source such as a system power supply or a solar battery. When a voltage type power converter is directly connected to another voltage source, a large current flows due to the potential difference, and the power converter is damaged or an abnormality occurs in the voltage source. Therefore, the voltage type power converter is connected to a voltage source via a reactor. Accordingly, a high-frequency current generated by the power conversion device flows through the winding of the reactor.

  Generally, a magnetic body constituting a reactor yoke connected to or incorporated in a power converter is provided with a gap in order to prevent magnetic saturation, thereby increasing magnetic flux leakage from the yoke in the vicinity of the gap.

  In the conventional reactor element with an air gap, in order to prevent an increase in eddy current loss in the winding due to the influence of the magnetic flux leakage, a winding-less area in which no winding is provided in the vicinity of the air gap is provided. . In this winding-less area, the winding of each magnetic leg of the yoke is divided into an outer winding 1 and an inner winding 2 connected in parallel with the same number of turns, and the inner winding 2 is turned into the winding 1. This is ensured by using a thinner wire diameter. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 2008-210998 (pages 6-7, FIG. 7)

  In a conventional reactor element with an air gap, the inner winding 2 needs to have a thin wire diameter in order to provide a winding-less area. When a high-frequency current flows through the winding, the effective conductor cross-sectional area of the winding is reduced due to the skin effect. Thus, there is a problem that the Joule loss is greatly increased in the winding with such a thin wire diameter.

  Further, if the conductor cross-sectional area of the winding is designed so that the Joule loss of the winding having the thin wire diameter becomes an allowable value, there is a problem that the reactor element is greatly increased in size.

  In addition, it is effective to use litz wire to reduce the effect of the skin effect, but the litz wire has a larger wire diameter than a single wire having the same conductor cross-sectional area, and therefore cannot be applied without an increase in size. was there.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a reactor having a gap in a yoke with reduced loss without increasing the size.

  A reactor according to the present invention includes a loop-shaped yoke provided with a first magnetic leg having a first gap and a second magnetic leg having a second gap, and a multilayer winding disposed so as to surround the first magnetic leg. And a second coil having a multi-layer winding arranged so as to surround the second magnetic leg, the first layer winding and the second coil of the first coil The second layer winding of the first coil is connected in series between the coils, the second layer winding of the first coil and the first layer winding of the second coil are connected in series between the coils, The ends of the windings of the first layer and the second layer that are not connected to each other are connected to each other to be connected to an external electric circuit, and the first layer and the second layer of the first coil are wound. Wires are stacked and the first and second layer windings of the second coil are stacked.

  Since the present invention is configured in this way, the filling rate of the winding is increased, and a large-diameter electric wire that can reduce the influence of the skin effect can be applied as the winding, so that the loss is reduced without increasing the size. The reactor used for the power converter can be obtained.

It is a perspective view of the reactor which concerns on Embodiment 1 of this invention. It is sectional drawing in the cross section S of FIG. 1 of Embodiment 1 of this invention. It is a circuit diagram for demonstrating the connection state of each layer winding of the reactor which concerns on Embodiment 1 of this invention. It is a circuit diagram for demonstrating the connection state of each layer winding of the conventional reactor. It is explanatory drawing for demonstrating the alignment winding of the conventional winding. It is a circuit diagram for demonstrating the connection state of each layer winding of the reactor which concerns on Embodiment 2 of this invention. FIG. 7 is a connection diagram showing an example of a specific connection for realizing the circuit of the circuit diagram of FIG. 6 according to Embodiment 2 of the present invention. It is explanatory drawing which shows the cross section of the part corresponding to the cross section S of FIG. 1, and the connection state of each layer winding of the reactor which concerns on Embodiment 3 of this invention. It is sectional drawing of the part corresponded to the cross section S of FIG. 1 of the reactor which concerns on Embodiment 4 of this invention. It is a circuit diagram for demonstrating the connection state of each layer winding of the reactor which concerns on Embodiment 5 of this invention. It is a connection diagram which shows an example of the concrete connection which implement | achieves the circuit of the circuit diagram of FIG. 10 which concerns on Embodiment 5 of this invention. It is sectional drawing of the part corresponded to the cross section S of FIG. 1 of the reactor which concerns on Embodiment 5 of this invention. It is a circuit diagram for demonstrating the connection state of each layer winding of the reactor which concerns on Embodiment 6 of this invention. It is a connection diagram which shows an example of the specific connection which implement | achieves the circuit of the circuit diagram of FIG. 13 concerning Embodiment 6 of this invention. It is explanatory drawing for demonstrating the connection state of the coil | winding pair of the reactor which concerns on Embodiment 7 of this invention.

Embodiment 1 FIG.
In FIG. 1, the perspective view of the reactor 1 which shows Embodiment 1 of this invention is shown. A loop-shaped yoke 2 formed of laminated steel plates is provided with a first magnetic leg 2a having a first gap 3a and a second magnetic leg 2b having a second gap 3b. The first gap 3a and the second gap 3b are provided to prevent the yoke 2 from being saturated. The first coil 4 is disposed so as to surround the first magnetic leg 2a, and the second coil 5 is disposed so as to surround the second magnetic leg 2b. Between the first coil 4 and the second coil 5, there is provided an inter-coil insulator 6 having a predetermined insulating function such as insulating paper, insulating film, molded resin plate, or injected epoxy resin. It has been.

FIG. 2 is a cross-sectional view of the cross section S in FIG. 1 as seen from the side of the white arrow in the figure. The upper side of FIG. 2 is referred to as “A side” and the lower side is referred to as “B side”. In the coil the first coil 4 having a winding of two layers, the winding 4L ₁ of the first layer on the inside near the yoke 2, the winding 4L ₂ outside the second layer are disposed, respectively. Similarly, the second coil 5 is a coil having two layers of windings, and the first layer winding 5L ₁ is disposed inside the yoke 2 and the second layer winding 5L ₂ is disposed outside the second coil 5. ing. Between the windings 4L ₁ yoke 2 and the first layer, and between the yoke 2 and the winding 5L ₁ of the first layer, respectively interlayer insulator 7 is provided. The interlayer insulator 7 may have any predetermined insulating function such as insulating paper, insulating film, molded resin plate, or injected epoxy resin. Between the winding 4L ₂ of the second layer winding 5L ₂ of the second layer, is provided between the coils insulation 6 above.

Not providing the interlayer insulator 7 is provided between the first winding of the layer 4L ₁ and winding 4L ₂ of the second layer of the first coil 4, the recess between the lines of the winding 4L ₁ of the first layer together will wound winding 4L ₂ of the second layer, so-called bale stacking have been made. Similarly, not providing the interlayer insulator 7 also between the winding 5L ₂ first layer winding 5L ₁ and of the second layer second coil 5, a line winding 5L ₁ of the first layer go wound winding 5L ₂ of the second layer in accordance with the concave portions between so-called bale stacking have been made.

FIG. 3 is a circuit diagram for illustrating the interlayer connection and inter-coil connection state of each layer winding of first coil 4 and second coil 5 of reactor 1 according to the first embodiment of the present invention. The reactor 1 is connected to a power source 8 that generates a high frequency on the A side of the first coil 4 and the A side of the second coil 5. Winding 4L ₁ of the first layer first coil 4 and the winding 5L ₂ of the second layer of the second coil 5, electrically form a first circuit 10 is connected between the coils in series with the B side is doing. Similarly, the winding 4L ₂ of the second layer of the first coil 4 and the winding 5L ₁ of the first layer of the second coil 5 is electrically connected between the coils in series B side second circuit 20 is constituted. The end portion of the first first layer of windings 4L ₁ and the second layer of windings 4L ₂ of the side where the inter-coil connections is not made of the coil 4 (A side), the interlayer-connected to external electrical It is a connection part with a circuit (power supply 8 in FIG. 3). Similarly, the end of the second first-layer winding 5L ₁ and the second layer of windings 5L ₂ of the inter-coil connections is not made side of the coil 5 (A side), the interlayer connection to an external It is another connection part with an electric circuit (power supply 8 in FIG. 3). That is, the first circuit 10 and the second circuit are electrically connected to the power supply 8 in parallel.

  Here, before describing the operation and effect of the reactor of the present invention, another conventional reactor with a gap will be described with reference to FIGS. 4 and 5 for comparison.

FIG. 4 is a circuit diagram showing an example of the state of interlayer connection and inter-coil connection of each layer winding of the first coil 4 and the second coil 5 of the conventional reactor, and FIG. It is explanatory drawing for demonstrating. Winding 4L ₁ of the first layer of the first coil 4 and the winding 4L ₂ of the second layer electrically constitute the first circuit 10 are interlayer connected in series with the B side, similarly, the second winding 5L ₁ of the first layer of the coil 5 and the winding 5L ₂ of the second layer constitutes an electrically second circuit 20 are interlayer connected in series on the B side. Further, the winding 4L ₁ of the first layer first coil 4 and the winding 5L ₁ of the first layer of the second coil 5 is connected between the coil A side to one terminal of the power source 8 that generates a high-frequency Similarly, the second layer winding 4L _{2 of} the first coil 4 and the second layer winding 5L _{2 of} the second coil 5 are connected between the coils on the A side and connected to the other terminal of the power source 8. ing. That is, the first circuit 10 and the second circuit are electrically connected in parallel, and the first coil 4 and the second coil 5 are respectively connected from the inner first layer to the outer second layer on the B side. It has a folded structure. Therefore, the first layer of windings 4L ₁ and between the ends of the winding 4L ₂ on the A side of the second layer, and the first layer winding 5L ₁ and the second layer of the second coil 5 of the first coil 4 between the ends of the windings 5L ₂ on the a side, the high voltage since the total voltage of the respective power supply 8 is applied.

  As described above, in an example of a conventional reactor, a high voltage is applied between the first layer and the second layer of each of the first coil 4 and the second coil 5, so that the first layer, the second layer, It is necessary to provide an interlayer insulator 7, such as an interlayer paper, between them. When the interlayer insulator 7 is provided, the so-called stacking, in which the second layer winding is wound in accordance with the recesses between the first layer windings, cannot be performed, as shown in FIG. The second layer winding is wound in accordance with the convex portion of the first layer winding, so-called aligned winding. In this way, since the winding rate of the wire is reduced as compared with the stacking, the Joule loss in the winding due to the skin effect due to the high frequency current generated by the power supply 8 is reduced without increasing the size. For this reason, it has been impossible to use a winding having a larger wire diameter, such as a single wire or a litz wire having an increased conductor cross-sectional area.

  A litz wire is a wire whose conductor surface area is increased by twisting a plurality of thin enameled wires, etc., and the actual cross-section of the conductor is reduced by the skin effect of high-frequency current. It has a function of preventing an increase in joule loss. By subdividing the conductor, it is possible to obtain a larger surface area increase than simply increasing the conductor diameter of the single wire (increasing the peripheral length of the wire), so in the high frequency region compared to a single wire of the same diameter Joule loss can be greatly reduced. Further, since the subdivided thin wires are twisted, an increase in eddy current loss due to the influence of magnetic flux from the outside of the litz wires can be reduced. Since the conductors of the litz wire are subdivided in this way, the wire diameter is larger than that of a single wire having the same conductor cross section.

In the first embodiment of the present invention, unlike the above-described example of the conventional reactor, between the opposing portions of the first layer winding 4L ₁ and the second layer winding 4L _{2 of} the first coil 4 are arranged. the potential difference is not generated, it does not require inter-layer insulator 7 between the winding 4L ₁ of the first layer of the first coil 4 and the winding 4L ₂ of the second layer. Similarly, a potential difference also between the opposite portions of the winding of the first layer of the second coil 5 5L ₁ and winding 5L ₂ of the second layer does not occur, the winding of the first layer of the second coil 5 It does not require the interlayer insulator 7 between the winding 5L ₂ lines 5L ₁ and the second layer. Thus, not only can the winding with a diameter as large as possible to omit the interlayer insulator 7 be used, but also the winding rate can be increased, and the filling rate of the winding is improved, and the winding with a larger diameter is possible. A wire can be used and Joule loss can be reduced. When a wire in which insulated thin wires are bundled is used, the wire becomes thick because of the insulation portion of the thin wires, but the eddy current loss of the wire in the winding due to the skin effect due to the high-frequency current generated by the power supply 8 Can be reduced.

  Further, when a wire in which insulated thin wires having a small diameter are bundled can be used as a winding, an increase in eddy current loss due to a skin effect due to a high frequency can be further prevented, and the first gap 3a of the yoke 2 can be prevented. And the increase in the eddy current loss in the winding | winding resulting from the magnetic flux leakage from the vicinity of the 2nd gap 3b can be prevented. Furthermore, when using a wire called a litz wire in which a bundle of fine wires is twisted, the circulating current loss between the strands can be reduced.

  If all of the windings cannot be Litz wires, use them for the first winding, which is the innermost layer of the first coil 4 or the second coil 5, so that the effect of the skin effect and the leakage of magnetic flux can be reduced. The impact can be reduced.

  By the way, in Embodiment 1 of the present invention, a potential difference is generated between the outermost layer winding of the first coil 4 and the outermost layer winding of the second coil 5, so that insulation is maintained between them. When a sufficient separation distance cannot be provided, it is necessary to use the inter-coil insulator 6. On the other hand, in the above-described conventional reactor, since the outermost layer winding of the first coil 4 and the outermost layer winding of the second coil 5 have the same potential, the first coil 4 and the second coil 5 There is no need to insert the inter-coil insulator 6 between them. However, in the first embodiment of the present invention, two interlayer insulators 7 can be reduced as compared with the conventional reactor, so the total number of required inter-coil insulators 6 and interlayer insulators 7 is The number of Embodiment 1 of the present invention is reduced by one. As will be described later, this difference increases as the number of winding layers of the first coil 4 and the second coil 5 increases. That is, in this invention, it can be said that as the number of layers in the windings of the first coil 4 and the second coil 5 increases, an electric wire having a larger diameter can be used as the winding, and the loss reduction effect becomes more remarkable.

As described above, in the reactor 1 according to the present invention, the loop-shaped yoke 2 provided with the first magnetic leg 2a having the first gap 3a and the second magnetic leg 2b having the second gap 3b, and the first magnetic leg 2a are provided. A reactor 1 including a first coil 4 having a multi-layer winding arranged so as to surround, and a second coil 5 having a multi-layer winding arranged so as to surround the second magnetic leg 2b, winding 4L ₁ of the first layer first coil 4 and the winding 5L ₂ of the second layer of the second coil is connected between the coils in series, the winding 4L ₂ of the second layer of the first coil second The coil 5L ₁ of the first layer of the coil is connected between the coils in series, and the end of the first coil 4 on the side where the inter-coil connection of the first layer 4 and the second layer of the windings 4L ₁ , 4L ₂ is not made The first layer of the first coil 4 and the first layer of the first coil 4 Since the two layers of windings 4L ₁ and 4L ₂ are stacked and the first layer and the second layer of windings 5L ₁ and 5L ₂ of the second coil 5 are stacked, the filling rate of the windings is increased, Since an electric wire bundled with small diameter wires that can reduce the influence of the skin effect can be applied as a winding, it is possible to obtain a reactor used in a power conversion device with reduced loss without increasing the size.

  In the reactor 1 according to the present invention, the winding in the layer one inner side from the outermost layer of the first coil 4 and the winding in the outermost layer of the second coil 5 are connected in series between the coils, and the first coil 4 The winding of the outermost layer of the second coil 5 and the winding of the innermost layer of the second coil 5 are connected in series between the coils, and the winding of the innermost layer of the second coil 5 and the outermost layer of the second coil 5 are connected. The end of the outer layer winding on the side where the inter-coil connection is not made is interlayer connected to make another connection with an external electric circuit, and the winding of the layer one layer inside the outermost layer of the first coil 4 And the outermost layer windings are stacked, the windings of the innermost layer and the outermost layer windings are stacked, and the first coil 4 and the second coil 5 are stacked. Since the inter-coil insulator 6 is provided in between, the filling rate of the winding is increased, and a large diameter electric wire that can reduce the influence of the skin effect is used as the winding. Since the possible use, and reduce the loss without increasing the size of, it is possible to obtain a reactor used in the power converter.

  In addition, since the winding is constituted by an electric wire twisted with a thin wire such as a litz wire, an increase in Joule loss due to the skin effect due to high frequency can be further prevented, and the winding caused by magnetic flux leakage from the yoke 2 can be prevented. An increase in eddy current loss in the wire can be prevented.

In the above description, the ends of the first and second windings 4L ₁ and 4L ₂ of the first coil 4 on the side where the inter-coil connection is not made are connected to each other with an external electric circuit. As a connecting portion, the winding on the innermost layer of the second coil 5 and the end of the outermost winding on the side where the inter-coil connection is not made are interlayer connected to the external electric circuit. Although it was set as another connection part, it cannot be overemphasized that the said connection part and said another connection part may be replaced.

  In the first embodiment of the present invention, no winding-less area is provided in the vicinity of the first gap 3a and the second gap 3b of the yoke 2, but the interlayer insulator 7 is omitted and the windings are stacked. A space secured by doing so may be used as a winding-less area.

Embodiment 2. FIG.
FIG. 6 is a circuit diagram for illustrating the state of interlayer connection and inter-coil connection of each layer winding of first coil 4 and second coil 5 of reactor 1 according to the second embodiment of the present invention. FIG. 7 is a connection diagram showing an example of a specific connection for realizing the circuit of the circuit diagram of FIG. The first embodiment shown in FIGS. 1 to 3 is that the reactor 1 is connected to the power source 8 on the A side of the first coil 4 and the B side of the second coil 5, and the first layer of the first coil 4. the B side of the winding 4L ₁ and a second layer a side of the winding 5L ₂ of the second coil 5 is electrically connected between the coils in series, the winding of the second layer of the first coil 4 The B side of the wire 4L ₂ and the A side of the first layer winding 5L ₁ of the second coil 5 are electrically connected in series between the coils, and the first layer winding 5L of the second coil 5 end of the _first and second layer winding 5L ₂ of B side are different that are interlayer connection.

  When the windings are connected in this way, the end on the high potential side of the outermost layer winding of the first coil 4 and the end on the high potential side of the winding on the outermost layer of the second coil 5 are insulated between the coils. It can arrange | position so that the body 6 may be pinched | interposed in the same direction. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

The connection pattern of each winding of the first embodiment shown in FIGS. 2 and 3, the first end and the second coil winding 4L ₂ of B side of the coil 4 facing in the same direction across the coil between the insulator 6 Although the potential difference between the ends of the winding 5L ₂ of the B side of 5 is substantially zero, just as the a-side of the winding 4L ₂ of the first coil 4 facing in the same direction across the coil between the insulator 6 the end of the potential difference between the ends of the a-side of the winding 5L ₂ of the second coil 5, both ends of the reactor 1 voltage (voltage across the series connected two windings, that is the power source 8 It can be seen that it is equal to the power supply voltage. On the other hand, in the connection pattern of each winding shown in FIGS. 6 and 7 of the second embodiment, the end portion of the 1 A side of the winding 4L _second coil 4 facing in the same direction across the coil between the insulator 6 the potential difference between the ends of the a-side of the winding 5L ₂ of the second coil 5, that is half of the voltage across Akutoru 1 (the voltage across the series connected one winding) I understand. Similarly, the potential difference between the first end portion of the B-side of the winding 4L ₂ of the coil 4 and the end of the winding 5L ₂ of the B side of the second coil 5 which faces in the same direction across the coil between the insulator 6 Also, it can be seen that the voltage at both ends of the reactor 1 is 1/2 of the voltage at both ends of one winding connected in series.

  Since the dielectric strength required for the inter-coil insulator 6 is determined by the highest potential difference between the outermost windings of the first coil 4 and the second coil 5, each winding of the second embodiment shown in FIG. By using this connection pattern, the required dielectric strength can be halved compared to the connection pattern of each winding in the first embodiment shown in FIG. As a result, the inter-coil insulator 6 can be made thinner, and if that portion is used to reduce the size of the yoke 2, the magnetic path length is shortened, and eddy current loss and hysteresis loss, that is, iron loss in the yoke 2 can be reduced. Further, if that amount is used to increase the conductor cross-sectional area of the innermost winding of the first coil 4 or the second coil 5 or both, the Joule loss in the winding can be reduced.

Embodiment 3 FIG.
FIG. 8 is an explanatory diagram showing a cross section of a portion corresponding to the cross section S of FIG. 1 of the reactor 1 according to the third embodiment of the present invention and a connection state of each layer winding of the first coil 4 and the second coil 5. . In the third embodiment, a method of stacking windings in the first coil 4 and the second coil 5 will be described.

In FIG. 8, the coil includes two layers of windings 4L ₁ and 4L ₂ of the first coil 4 and two layers of windings 5L ₁ and 5L _{2 of} the second coil. If you stacked bales in each coil, the windings 4L ₂ of the second layer to one turn less wind than the winding 4L ₁ of the first layer in the first coil 4. Similarly, the winding 5L ₂ of the second layer to one turn less wind than the winding 5L ₁ of the first layer in the second coil 5. Furthermore, in the first circuit 10 connected to the winding 4L ₁ of the first layer first coil 4 and the winding 5L ₂ of the second layer of the second coil 5 via the connecting portion 9a (Fig, white The winding of the coating is equivalent). During Similarly, connected to the winding 4L ₂ of the second layer of the first coil 4 and the winding 5L ₁ of the first layer of the second coil 5 via the connecting portion 9b second circuit 20 (FIG., Gray winding is equivalent). The first circuit 10 and the second circuit 20 are connected to the power supply 8 in parallel. In FIG. 8, since the first layer windings 4L ₁ and 5L ₁ each have 6 turns and the second layer windings 4L ₂ and 5L ₂ each have 5 turns, the first circuit 10 and the second circuit Both circuits 20 have a total of 11 turns.

  Further, since the first coil 4 and the second coil 5 are disposed so as to surround the magnetic leg 3a and the magnetic leg 3b of the loop-shaped yoke 2, respectively, the connection of the windings by the connecting portions 9a and 9b is the above loop. It is constructed so that it can be performed outside, making it easy to assemble.

  Normally, in the case of aligned winding, the windings of the first layer and the second layer have the same number of turns, but in the case of stacking, as the winding layer advances, It is preferable that the number of turns of the windings of the matching layers be increased or decreased by one turn.

  In FIG. 8, the total number of turns of the first coil 4 and the second coil 5 is the same. However, if the total number of turns is the same in the first circuit 10 and the second circuit 20, the first coil 4 4 and the total number of turns of the second coil 5 may be different. Thus, by making the first circuit 10 and the second circuit 20 have the same total number of turns, the inductances of the first circuit 10 and the second circuit 20 are more uniform, and the first circuit 10 and the second circuit 20 have the same number of turns. Since the currents of the second circuit 20 are the same, the circulating current loss becomes zero and the loss can be reduced.

  In FIG. 8, the number of turns is changed by one turn for the first layer winding and the second layer winding. However, the number of turns is not limited to one, and the first coil 4 and the second coil 5 are each composed of two layers. However, it may be an N-layer coil having a larger number of layers. In short, if the first circuit 10 and the second circuit 20 have the same turn, the same effect can be obtained.

Embodiment 4 FIG.
FIG. 9 is a cross-sectional view of a portion corresponding to cross section S of FIG. 1 of reactor 1 according to Embodiment 4 of the present invention. In the third embodiment, when the windings are stacked in the first coil 4 and the second coil 5, the connection portions 9 a and 9 b are provided between the windings of the first coil 4 and the second coil 5. Although used, this Embodiment 4 demonstrates the method of stacking a winding by continuous winding, without using the connection parts 9a and 9b.

  All the windings cannot be continuously wound while maintaining the number of turns of each layer and the connection pattern between the windings of each layer of the first coil 4 and the second coil 5 of the third embodiment shown in FIG. . Therefore, suppose a case in which continuous winding is performed while maintaining only the number of turns of each layer without considering the maintenance of the connection pattern.

First, the winding 4L ₁ of the first layer of the first coil 4 wound to form a first circuit 10 by turning the winding 5L ₁ of the first layer of the second coil 5 continuously wound to the next. The winding end portion of the first circuit 10 is a connection portion with the power source 8. Subsequently, the second layer winding 4L ₂ of the first coil 4 is wound, and then the second layer winding 5L ₂ of the second coil 5 is wound to constitute the second circuit 20. The winding end portion of the second circuit 20 and the winding start portion of the first circuit 10 are connected to form a connection portion with the power source 8. At this time, the number of turns of the first circuit 10 is the sum of 6 + 6 = 12 turns of winding 4L ₁ and the winding 5L _1, the number of turns of the second circuit 20 from the winding 4L ₂ and winding 5L ₂ The total of 5 + 5 = 10 turns. Accordingly, the number of turns of the first circuit 10 is increased by two turns compared to the second circuit 20. Here, if the first circuit 10 and the second circuit 20 are connected in parallel to the power supply 8, a large amount of current flows through the second circuit 20 due to the difference in the number of turns, and a circulating current loss occurs.

In order to avoid the problem that the circulating current loss occurs, in the fourth embodiment, winding is performed as shown in FIG. First winding 4L ₁ of the first layer of the first coil 4 likewise wound and 9, next to the winding one turn less than in the example illustrated one layer of winding 5L ₁ in Figure 9 of the second coil 5 Turn to configure the first circuit 10 (corresponding to a gray winding in the figure). The winding end portion of the first circuit 10 is a connection portion with the power source 8. Subsequently winding 4L ₂ of the second layer the first coil 4 likewise wound and 8, next to the second 1-turn more than the example shown the second layer winding 5L ₂ in FIG. 8 of the coil 5 The second circuit 20 (corresponding to white winding in the figure) is formed by winding. The winding end portion of the second circuit 20 and the winding start portion of the first circuit 10 are connected to form a connection portion with the power source 8. Space for a minute to 1 turn many winding the second layer winding 5L ₂ of the second coil 5 one turn less wound windings 5L ₁ of the first layer of the second coil 5 of the above Use the free space that was created. Accordingly, as shown in FIG. 9, the second layer winding 5L ₂ of the second coil 5 is positioned alongside the first layer winding 5L ₁ and the outer periphery of the first layer. And have a part.

  When continuous winding is performed in this way, the number of turns of the first circuit 10 is 6 + 5 = 11 turns, and the number of turns of the second circuit 20 is 5 + 5 + 1 = 11 turns. The number of turns of the circuit 20 can be made equal, and the occurrence of circulating current loss due to the difference in the number of turns between the circuits can be prevented. Further, by performing continuous winding, the connecting portions 9a and 9b shown in FIG. 8 can be omitted, so that the number of parts can be reduced and the process of assembling them can be omitted.

  In FIG. 9, the number of turns of the first circuit 10 and the number of turns of the second circuit 20 are made the same by adjusting the number of turns of the winding of each layer of the second coil 5. Needless to say, the number of turns of each layer of the coil 4 may be adjusted.

Embodiment 5 FIG.
In the fourth embodiment shown in FIG. 9, a method of winding all the windings in a continuous winding by using a winding connection pattern different from that of the third embodiment shown in FIG. 8. explained. In the fifth embodiment, a method of introducing continuous winding while maintaining the connection pattern of the winding of the third embodiment shown in FIG. 8 will be described.

If the one wire for winding of the first circuit 10 and the other wire for winding of the second circuit are first separated when winding the winding, the implementation shown in FIG. In the connection pattern of the winding of the third form, partial continuous winding is possible. Using said one of the wire first, winding a wire 4L ₁ of the first layer of the first coil 4. Next to using the other wire, winding a wire 5L ₁ of the first layer of the second coil 5. Subsequently, constituting the first circuit 10 by winding a winding wire 5L ₂ of the second layer of the second coil 5 in the one wire. Thereafter, constituting the second circuit 20 by winding the winding wire 4L ₂ of the second layer of the first coil 4 in the other wire. Next, the winding start portion of the first circuit 10 and the winding opening end portion of the second circuit 20 are connected to form a connection portion with the power source 8, and the winding opening end portion of the first circuit 10 and the The winding start portion of the second circuit 20 is connected to form a connection portion with the power source 8.

  If the winding operation is performed in such a process, partial but continuous winding is possible, and since the connecting portions 9a and 9b shown in FIG. 9 can be omitted, the number of parts can be reduced and the process of assembling them can be omitted. .

Embodiment 6 FIG.
In the above embodiment, an example in which the first coil 4 and the second coil 5 have two layers has been described. In the sixth embodiment, a case will be described in which the number of turns is increased in order to obtain a larger inductance.

FIG. 10 is a circuit diagram for illustrating the state of interlayer connection and inter-coil connection of the respective layer windings of the first coil 4 and the second coil 5 of the reactor according to the sixth embodiment of the present invention. FIG. 12 is a connection diagram showing an example of a specific connection for realizing the circuit of the circuit diagram of FIG. FIG. 13 is a cross-sectional view of a portion corresponding to cross section S of FIG. 1 of reactor 1 according to Embodiment 6 of the present invention. In the example shown in FIGS. 10 to 12, the windings of the first coil 4 are the first layer winding 4L ₁ , the second layer winding 4L ₂ , the third layer winding 4L ₃ , It has a four-layer winding structure of four-layer winding 4L ₄ . The windings of the second coil 5 are the first layer winding 5L ₁ , the second layer winding 5L ₂ , the third layer winding 5L ₃ , the fourth layer winding 5L ₄ , from the yoke 2 side. This is a four-layer winding structure.

As shown in FIG. 10, the first layer winding 4L ₁ of the first coil, the second layer winding 5L _{2 of} the second coil, the third layer winding 4L ₃ of the first coil, and the second coil fourth layer winding 5L ₄ of configure electrically the first circuit 10 are connected in series, the winding 4L 2 of the second layer of the first _coil, the first layer of windings of the second coil 5L ₁ , the fourth coil 4L ₄ of the first coil and the third coil 5L ₃ of the second coil are electrically connected in series to form the second circuit 20.

  Subsequently, the first layer winding, which is the innermost layer of the first coil 4, and the second layer winding are interlayer-connected to form a connection portion with an external electric circuit (power source 8 in FIG. 11). The winding of the innermost layer and the winding of the outermost layer from the outermost layer of the coil 5 are interlayer-connected to form a connection portion with an external electric circuit (power source 8 in FIG. 11).

  The windings of the first coil 4 and the second coil 5 are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is , 1 to N, and N = 2 in the examples of FIGS. 10 to 12), the number of turns of the windings in the same order layers of the first coil 4 and the second coil 5 are equal. It is wound to become. Further, the total number of turns of the windings of the first circuit 10 and the total number of turns of the windings 20 of the second circuit are made equal so that the circulating current loss due to the difference in the number of turns does not occur. Such electrical connection can be realized by a specific connection shown in FIG. 11, for example.

With this configuration, the (2 × n−1) layer winding and the (2 × n) layer winding of the same coil have the same potential. For example, the winding 4L ₂ of the first layer winding 4L ₁ and the second layer of the first coil 4, a third layer of windings 4L ₃ and the fourth layer winding 4L ₄ of the first coil 4, a second winding 5L ₂ first layer winding 5L ₁ and of the second layer coil 5, winding 5L ₄ of the third layer coil 5L ₃ of the fourth layer a second coil 5 have the same potential, respectively. Therefore, as shown in FIG. 13, it is not necessary to provide an interlayer insulator 7 between the (2 × n−1) layer windings and the (2 × n) layer windings of the same coil. It is possible to stack 2 × n−1) layer windings and (2 × n) layer windings.

  In the example shown in FIGS. 10 to 12, the number of turns of the windings of the same order layers of the first coil 4 and the second coil 5 is made completely equal, but the winding of the (2 × n−1) layer is made. When the potential difference between the wire and the (2 × n) layer winding (n is a positive integer from 1 to N) can be suppressed to a level corresponding to the potential difference that can be withstood by the insulation coating of the winding. Does not need to match the number of turns completely.

  In this way, a winding having a diameter large enough to eliminate the interlayer insulator 7 between the winding of the (2 × n−1) layer and the winding of the (2 × n) layer of the same coil is used. Not only can the winding be performed as described above, the winding filling rate is improved, and windings with a larger diameter can be used. Accordingly, for example, a single wire or a litz wire having an increased conductor cross-sectional area can be used without increasing the size, and the Joule loss in the winding due to the skin effect due to the high-frequency current generated by the power supply 8 can be reduced.

  In addition, when the insulated thin wire having a small diameter is bundled and a wire having the same conductor cross-sectional area as that of the single wire can be used as the winding, it is possible to further prevent an increase in Joule loss due to the skin effect due to the high frequency, An increase in eddy current loss in the winding due to magnetic flux leakage from the vicinity of the first gap 3a and the second gap 3b of the yoke 2 can be prevented.

  If all of the windings cannot be Litz wires, use them for the first winding, which is the innermost layer of the first coil 4 or the second coil 5, so that the effect of the skin effect and the leakage of magnetic flux can be reduced. The impact can be reduced.

  By the way, in this invention, since a potential difference is generated between the outermost layer winding of the first coil 4 and the outermost layer winding of the second coil 5, a sufficient separation distance is maintained to maintain insulation therebetween. When it cannot be provided, it is necessary to use the inter-coil insulator 6 which is not necessary in the conventional reactor shown in FIG. However, in the connection pattern of the sixth embodiment of the present invention, the number of interlayer insulators 7 that can be omitted increases as the number of layers of the first coil 4 and the second coil 5 increases. As the number of layers in the winding of the second coil 5 increases, the above-described effect becomes remarkable.

  As described above, the reactor according to the present invention surrounds the first magnetic leg 2a and the loop-shaped yoke 2 provided with the first magnetic leg 2a having the first gap 3a and the second magnetic leg 2b having the second gap 3b. A first coil 4 having a multi-layer winding arranged in such a manner and a second coil 5 having a multi-layer winding arranged so as to surround the second magnetic leg 2b. The windings of the coil 4 and the second coil 5 are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is 1 ~ N), the winding of the (2 × n−1) layer of the first coil 4 and the winding of the (2 × n) layer of the second coil 5 are coiled in series. The windings of the (2 × n) layer of the first coil 4 and the windings of the (2 × n−1) layer of the second coil 5 are connected in series between the coils. The windings of the (2 × n−1) layer and the (2 × n) layer of the first coil 4 are stacked, and the (2 × n−1) layer and the (2 ×) of the second coil 5 are stacked. n) layer windings are stacked, when n = 1, between the (2 × n−1) layer windings of the first coil 4 and the yoke 2, and when n ≠ 1, the first Since the interlayer insulator 7 is provided between the winding of the (2 × n−1) layer and the winding of the (2 × n−2) layer of the coil 4, the number of interlayer insulators 7 to be used is This makes it possible to stack the windings of adjacent layers. As a result, the filling rate of the winding is increased, and an electric wire having a large diameter can be employed as the winding. Therefore, the reactor 1 having a gap in the yoke 2 with reduced loss can be obtained without increasing the size.

  Further, the reactor according to the present invention is a first circuit in which any N layers of the first coil 4 and any N layers of the second coil 5 are all connected in series. 10 and a second circuit 20 in which windings other than any N layers of the first coil 4 and windings other than any N layers of the second coil 5 are all connected in series. The first circuit 10 and the second circuit 20 are connected in parallel, and the total number of turns of the winding of the first circuit 10 and the total number of turns of the winding of the second circuit 20 are Since they are the same, the circulating current caused by the difference in the number of turns does not flow through the winding, and the circulating current loss caused by the difference in the number of turns can be reduced.

  In the sixth embodiment of the present invention, no winding-less area is provided in the vicinity of the first gap 3a and the second gap 3b of the yoke 2, but the interlayer insulator 7 is omitted and the windings are stacked. A space secured by doing so may be used as a winding-less area.

Embodiment 7 FIG.
In the sixth embodiment, the innermost layer of the first coil 4, the first layer winding and the second layer winding are interlayer-connected to form a connection portion with an external electric circuit, and the second coil 5 is the innermost layer. The winding of the inner layer and the winding of the outermost layer are connected to each other by connecting the windings of the innermost layer and the outermost layer to the external electric circuit. The first coil 4 is provided at a portion where the innermost layer winding and the outermost layer winding are connected to each other between the outermost layers of the first coil 4.

FIG. 13 is a circuit diagram for illustrating the state of interlayer connection and inter-coil connection of the respective layer windings of first coil 4 and second coil 5 of reactor 1 according to the seventh embodiment of the present invention. FIG. 14 is a connection diagram showing an example of a specific connection for realizing the circuit of the circuit diagram of FIG. 13 and 14, the windings of the first coil 4 are the first layer winding 4L ₁ , the second layer winding 4L ₂ , the third layer winding 4L ₃ , and the fourth layer winding from the yoke 2 side. It has a four-layer winding structure of winding 4L ₄ . The windings of the second coil 5 are the first layer winding 5L ₁ , the second layer winding 5L ₂ , the third layer winding 5L ₃ , and the fourth layer winding 5L ₄ from the yoke 2 side. It has a four-layer winding structure.

As shown in FIG. 13, the first layer winding 4L ₁ of the first coil, the second layer winding 5L ₂ of the second coil, the third layer winding 5L ₃ of the second coil, and the first coil winding The fourth layer winding 4L ₄ is electrically connected in series to form the first circuit 10, and the second layer winding 4L ₂ of the first coil, the first layer winding 5L of the second coil. ₁ , the second layer winding 5L _{4 of} the second coil and the third layer winding 4L ₃ of the first coil are electrically connected in series to form the second circuit 20.

  Subsequently, the first layer winding, which is the innermost layer of the first coil 4, and the second layer winding are interlayer-connected to form a connection portion with an external electric circuit (power source 8 in FIG. 13). The winding on the innermost layer of the coil 4 and the winding on the outermost layer are layer-connected to form another connection with an external electric circuit (power source 8 in FIG. 13).

  The windings of the first coil 4 and the second coil 5 are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is , 1 to N, and N = 2 in the examples of FIGS. 13 and 14), the number of turns of the windings in the same order layer of the first coil 4 and the second coil 5 is equal. It is wound to become. Further, the total number of turns of the windings of the first circuit 10 and the total number of turns of the windings 20 of the second circuit are made equal so that the circulating current loss due to the difference in the number of turns does not occur. Such an electrical connection can be realized by a specific connection shown in FIG. 14, for example.

With this configuration, the (2 × n−1) layer winding and the (2 × n) layer winding of the same coil have the same potential. For example, the winding 4L ₂ of the first layer winding 4L ₁ and the second layer of the first coil 4, a third layer of windings 4L ₃ and the fourth layer winding 4L ₄ of the first coil 4, a second winding 5L ₂ first layer winding 5L ₁ and of the second layer coil 5, winding 5L ₄ of the third layer coil 5L ₃ of the fourth layer a second coil 5 have the same potential, respectively. Therefore, as shown in FIG. 14, it is not necessary to provide an interlayer insulator 7 between the (2 × n−1) layer winding and the (2 × n) layer winding of the same coil. It is possible to stack 2 × n−1) layer windings and (2 × n) layer windings.

  In FIGS. 13 and 14, the number of turns of the windings of the same order layers of the first coil 4 and the second coil 5 is made completely equal, but the (2 × n−1) layer windings and the ( 2 × n) when the potential difference between the windings of the layer (n is a positive integer from 1 to N) can be suppressed to a level corresponding to the potential difference that can be withstood by the insulation coating of the winding, the number of turns There is no need to completely match.

  In this way, a winding having a diameter large enough to eliminate the interlayer insulator 7 between the winding of the (2 × n−1) layer and the winding of the (2 × n) layer of the same coil is used. Not only can the winding be performed as described above, the winding filling rate is improved, and windings with a larger diameter can be used. Accordingly, for example, a single wire or a litz wire having an increased conductor cross-sectional area can be used without increasing the size, and the Joule loss in the winding due to the skin effect due to the high-frequency current generated by the power supply 8 can be reduced.

  In addition, when insulated thin wires with a diameter smaller than a single wire having the same conductor cross-sectional area are bundled and a wire having the same conductor cross-sectional area as that of a single wire can be used as a winding, the Joule loss due to the skin effect due to high frequency is further increased. , And an increase in eddy current loss in the winding due to magnetic flux leakage from the vicinity of the first gap 3a and the second gap 3b of the yoke 2 can be prevented.

  If all of the windings cannot be Litz wires, use them for the first winding, which is the innermost layer of the first coil 4 or the second coil 5, so that the effect of the skin effect and the leakage of magnetic flux can be reduced. The impact can be reduced.

  By the way, in this invention, since a potential difference is generated between the outermost layer winding of the first coil 4 and the outermost layer winding of the second coil 5, a sufficient separation distance is maintained to maintain insulation therebetween. When it cannot be provided, it is necessary to use the inter-coil insulator 6 which is not necessary in the conventional reactor shown in FIG. However, in the connection pattern of the seventh embodiment of the present invention, the number of interlayer insulators 7 that can be omitted increases as the number of layers of the first coil 4 and the second coil 5 increases. As the number of layers in the winding of the second coil 5 increases, the above-described effect becomes remarkable.

  Further, when the connection pattern of each winding of the seventh embodiment is used, the end on the high potential side of the outermost layer winding of the first coil 4 and the high potential side of the outermost layer winding of the second coil 5 are used. It can arrange | position so that an edge part may oppose in the same direction on both sides of the insulator 6 between coils. When the ends on the high potential side of the two windings facing each other across the inter-coil insulator 6 are set in the same direction, the ends on the high potential side of the two windings are in different directions. Compared with, the maximum potential difference between the two windings can be reduced. As a result, the inter-coil insulator 6 can be made thinner, and if that portion is used to reduce the size of the yoke 2, the magnetic path length is shortened, and the iron loss, which is an eddy current loss and hysteresis loss in the yoke 2, can be reduced. Further, if this amount is used to increase the cross-sectional area of the innermost layer winding of the first coil 4 and / or the second coil 5, it is possible to reduce Joule loss in the winding.

  In the seventh embodiment of the present invention, no winding-less area is provided in the vicinity of the first gap 3a and the second gap 3b of the yoke 2, but the interlayer insulator 7 is omitted and the windings are stacked. A space secured by doing so may be used as a winding-less area.

Embodiment 7 FIG.
FIG. 15 is an explanatory diagram for explaining a connection state of the winding pair of the first coil and the winding pair of the second coil of the reactor according to the seventh embodiment of the present invention. Except for the number of windings of each layer of the first coil 4 and the second coil 5 and the connection state thereof, the description is omitted because it is the same as the above-described embodiment.

  In FIG. 15, the windings of the respective layers constituting the first coil 4 (not shown) are arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the second (2 Xn) layers (n is a positive integer from 1 to N), and windings of each layer constituting the second coil 5 (not shown) are arranged from the inner layer to the first layer, the second layer,. .. (2 × n−1) layer, (2 × n) layer (n is a positive integer from 1 to N). Further, a pair of the (2 × n−1) layer winding and the (2 × n) layer winding of the first coil 4 is defined as the nth winding pair of the first coil 4, and the second coil 5 The pair of the (2 × n−1) layer winding and the (2 × n) layer winding is defined as the nth winding pair of the second coil 5. At this time, any one winding of the n-th winding pair of the first coil 4 and any one winding of the n-th winding pair of the second coil 5 are arranged in any order from n = 1 to N. Are connected in series to form a first circuit 10 (not shown). The other winding paired with the one of the n-th winding pair of the first coil 4 and the other winding paired with the one of the n-th winding pair of the second coil 5 are n = 1 to 1. The second circuit 20 (not shown) is configured in series in any order up to N.

In FIG. 15, the first winding pair of the first coil 4 configured by the first layer winding 4L ₁ and the second layer 4L _{2 of} the first coil 4 is provided on the connection portion side with the power source 8. Arranged on the side of another connection portion with the power source 8, the second coil 5 is composed of the second (2 × N−1) layer winding 5L _2N-1 and the second (2 × N) layer 5L _2N . Although the Nth winding pair of the second coil 5 is arranged, the order is not limited to this. The one winding and the other winding of each winding pair have substantially the same number of turns.

  The total number of turns of the first circuit 10 and the total number of turns of the second circuit 20 are configured to be the same, and the first circuit 10 and the second circuit 20 are connected to the previous connection part and another connection part. Connected in parallel. Although not shown, the one winding and the other winding of the n-th winding pair of the first coil 4 are stacked in at least a part of the winding pairs. Similarly, The one winding and the other winding of the n-th winding pair of the second coil 5 are stacked in at least a part of the winding pairs.

  Further, when n = 1, when n ≠ 1 between the first winding pair of the first coil 4 and the yoke 2 and between the first winding pair of the second coil 5 and the yoke 2, , Between the nth winding pair and the (n−1) th winding pair of the first coil 4 and between the nth winding pair and the (n−1) th winding pair of the second coil 5, Interlayer insulators 7 (not shown) are provided respectively.

  With such a configuration, not only the number of interlayer insulators 7 to be used can be reduced, but also the windings can be stacked, so that the filling rate of the windings can be improved and windings with a larger diameter can be used. Accordingly, for example, a single wire or a litz wire having an increased conductor cross-sectional area can be used without increasing the size, and the Joule loss in the winding due to the skin effect due to the high-frequency current generated by the power supply 8 can be reduced.

  Also, since the total number of turns of the windings of the first circuit 10 connected in parallel and the total number of turns of the windings of the second circuit 20 are made the same, the circulating current due to the difference in the number of turns is generated in the windings. The circulating current loss caused by the difference in the number of turns without flowing can be reduced.

DESCRIPTION OF SYMBOLS 1 Reactor, 2 yoke, 2a 1st magnetic leg, 2b 2nd magnetic leg, 3a 1st gap, 3b 2nd gap, 4 1st coil, 4L ₁ 1st layer winding, 4L ₂ 2nd layer winding 4L ₃ winding of 3rd layer, 4L ₄ winding of 4th layer, 4L _2n-1 winding of (2 × n-1) layer, 4L _2n winding of (2 × n) layer, 4L _2N-1 second (2 × n-1) layers of windings, _{4L 2N} first (2 × n) layer of windings, 4P ₁ first winding pair, the n winding pair 4P _n, 4P _n n-th winding Line pair, 5 second coil, 5L ₁ first layer winding, 5L ₂ second layer winding, 5L ₃ third layer winding, 5L ₄ fourth layer winding, 5L _2n-1 first ( 2 × n−1) layer winding, 5L _2n th (2 × n) layer winding, 5L _2N−1 th (2 × N−1) layer winding, 5L _2N th (2 × N) layer winding, 5P _1-to-first winding, the n winding pair 5P _n, 5P _n n-th winding Pair, 6 Insulator between coils, 7 Interlayer insulator, 8 Power supply, 9a connection part, 9b connection part, 10 1st circuit, 20 2nd circuit.

Claims (8)

A loop-shaped yoke provided with a first magnetic leg having a first gap and a second magnetic leg having a second gap;
A first coil having a multi-layer winding disposed so as to surround the first magnetic leg;
A reactor including a second coil having a multi-layer winding disposed so as to surround the second magnetic leg,
A first layer winding of the first coil and a second layer winding of the second coil are connected in series between the coils;
Connecting the second layer winding of the first coil and the first layer winding of the second coil in series between the coils;
An end portion of the first coil of the first coil and the second layer winding on the side where the connection between the coils is not made is interlayer-connected to form a connection portion with an external electric circuit,
Stacking the first layer and second layer windings of the first coil;
A reactor in which the first layer and second layer windings of the second coil are stacked. A winding in the layer one inner side than the outermost layer of the first coil and a winding in the outermost layer of the second coil are connected between the coils in series,
The outermost layer winding of the first coil and the innermost layer winding of the second coil are connected in series between the coils,
The winding on the innermost layer of the first coil and the end of the outermost winding on the side where the inter-coil connection is not made, or the innermost layer of the second coil Any one of the ends of the windings of the outermost layer and the windings of the outermost layer where the connection between the coils is not made, is a connection portion with an external electric circuit by interlayer connection,
Stacking the winding of the layer one inner side and the winding of the outermost layer from the outermost layer of the first coil;
Stacking the winding of the inner layer and the winding of the outermost layer from the outermost layer of the second coil;
The reactor according to claim 1, wherein an inter-coil insulator is provided between the first coil and the second coil. The windings of the first coil and the second coil are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is 1 To a positive integer from ~ N),
The winding of the (2 × n−1) layer of the first coil and the winding of the (2 × n) layer of the second coil are connected between the coils in series,
A winding of the (2 × n) layer of the first coil and a winding of the (2 × n−1) layer of the second coil are connected in series between the coils;
Stacking the (2 × n−1) and (2 × n) layer windings of the first coil;
Stacking the (2 × n−1) and (2 × n) layer windings of the second coil;
When n = 1, between the winding of the (2 × n−1) layer of the first coil and the yoke, and when n ≠ 1, the (2 × n−1) layer of the first coil. 3. The reactor according to claim 1, wherein an interlayer insulator is provided between the first and second (2 × n−2) layer windings. The windings of the first coil and the second coil are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is 1 To a positive integer from ~ N),
A first circuit in which the windings of any N layers of the first coil and the windings of any N layers of the second coil are all connected in series;
A second circuit in which windings other than any N layers of the first coil and windings other than any N layers of the second coil are all connected in series;
The first circuit and the second circuit are connected in parallel;
The total number of turns of the windings of the first circuit and the total number of turns of the windings of the second circuit are the same. The high potential end of the outermost winding of the first coil and the high potential end of the outermost winding of the second coil are opposed in the same direction across the inter-coil insulator. The reactor according to any one of claims 1 to 4. The winding of the innermost layer of the first coil and the winding of the innermost layer of the second coil are formed by a twisted wire. The reactor described in. The reactor according to claim 4, wherein the winding of the first circuit and the winding of the second circuit are each continuously wound. A loop-shaped yoke provided with a first magnetic leg having a first gap and a second magnetic leg having a second gap;
A first coil having a multi-layer winding disposed so as to surround the first magnetic leg;
A reactor including a second coil having a multi-layer winding disposed so as to surround the second magnetic leg,
The windings of the first coil and the second coil are respectively arranged from the inner layer to the first layer, the second layer,... The (2 × n−1) layer, the (2 × n) layer (n is , A positive integer from 1 to N),
A pair of (2 × n−1) layer windings and (2 × n) layer windings of the first coil is an n-th winding pair of the first coil,
A pair of (2 × n−1) layer windings and (2 × n) layer windings of the second coil is defined as an nth winding pair of the second coil,
Any one winding of the n-th winding pair of the first coil and any one winding of the n-th winding pair of the second coil are serially arranged in an arbitrary order from n = 1 to N. Connected to form a first circuit,
The other winding paired with any one of the n-th winding pair of the first coil and the other winding paired with any one of the n-th winding pair of the second coil, n = 1 to N are connected in series in any order to form the second circuit,
Configuring the total number of turns of the first circuit and the total number of turns of the second circuit to connect the first circuit and the second circuit in parallel;
Stacking one winding and the other winding of the n-th winding pair of the first coil with at least some winding pairs;
Stacking one winding and the other winding of the n-th winding pair of the second coil with at least a part of the winding pairs;
When n = 1, between the n-th winding pair of the first coil and the yoke and between the n-th winding pair of the second coil and the yoke, when n ≠ 1, Between the n-th winding pair and the (n-1) winding pair of the first coil and between the n-th winding pair and the (n-1) winding pair of the second coil, A reactor characterized by providing an insulator.

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