JP4258722B2 - Reactor device - Google Patents

Description

  The present invention relates to a reactor device, and more particularly to a reactor device that forms a main transformer and a feedback transformer and extracts an output from a secondary winding when the primary winding is energized and de-energized.

For example, in the known transformer (50) shown in Patent Document 1 and FIG. 9, the core is assembled by a first E-type ferrite core (51) and a second E-type ferrite core (52). As shown in FIG. 10, for example, the first E-shaped ferrite core (51) includes a middle leg part (53) and a pair of outer leg parts (54, 55) arranged on both sides of the middle leg part (53). The middle leg portion (53) and the outer leg portions (54, 55) arranged in parallel with each other are integrally held by the base portion (56) at each end. After winding the coil (57) around the middle leg (53) via the bobbin (58), the second leg is placed on the other end of the middle leg (53) and the pair of outer legs (54, 55). The transformer (50) is assembled by mounting the E-shaped ferrite core (52).
The cross-sectional area of the conventional E-core middle leg and the pair of outer legs located on both sides of the middle leg is generated at the middle leg by winding the primary and secondary windings around the middle leg. Since the magnetomotive force to be split is divided by half into a pair of outer legs (13, 14) arranged on both sides of the middle leg (12), theoretically it is arranged on both sides compared to the cross-sectional area of the middle leg. The cross-sectional areas of the pair of outer legs are each ½.

Japanese Utility Model Publication No. 59-109121 (Japanese Utility Model Application No. 58-2434)

By the way, in the E-type ferrite core (50, 51) used as the core for the reactor device, when the primary winding and the secondary winding are wound around the middle leg portion (53) and used as the reactor device, Power is supplied to the primary winding by the reactor device, and energy is supplied to the middle leg (53) as the first leg and one outer leg (55) as the third leg (6). Simultaneously with the accumulation, energy is taken out from the secondary winding wound around the other outer leg portion (54) as the saturated leg. Further, when the current flowing through the primary winding wound around the middle leg portion (53) is stopped, the energy accumulated in the reactor device is taken out from the secondary winding wound around the middle leg portion (53). In this case, since the reactor device is used by being DC-biased, the cross-sectional area of one outer leg portion (55) for extracting the energy stored in the reactor device is smaller than the cross-sectional area of the middle leg portion (53). And one of the outer legs (55) may saturate or saturate quickly, and cannot store sufficient energy, so that the reactor device can be turned on and off to form one switching cycle. There is a problem that the reactor device is not suitable for obtaining output from the secondary winding.
The present invention provides a reactor device suitable for obtaining a predetermined amount of energy from each of the first secondary winding and the second secondary winding both when the switching cycle is turned on and off. Objective.

A reactor device according to the present invention includes a core device (2) and a coil device (3) wound around the core device (2). The core device (2) includes a first leg (4), a second leg (5), a third leg (6), a first leg (4), The base part (7) which forms a magnetic circuit by connecting the two leg parts (5) and the third leg part (6) is provided. The coil device (3) includes a primary winding (N _p ) wound around the first leg (4) and a first secondary winding wound around the second leg (5). (N _s ) and a second secondary winding (N _f ) wound around the first leg (4) or the third leg (6). Primary winding one end of the (N _p) connected to one end of the DC power source (E _i), the other end of the leakage inductance (L _s) and the primary winding via the main switch (Q _m) (N _p) Is connected to the other end of the DC power supply (E _i ), and the connection point between the leakage inductance (L _s ) and the main switch (Q _m ) is connected to the DC power supply via the auxiliary switch (Q _s ) and snubber capacitor (C _s ). Connect to one end of (E _i ). Second leg (5), Ru with a small small section portion than the cross sectional area of the third leg (6) (11). In auxiliary switch (Q _s) is off, when the main switch (Q _m) is turned on, the primary winding from a DC power supply _{(E i) (N p)} , leakage inductance (L _s) and a main switch (Q _A current flows through _m ) and energy is stored in the leakage inductance (L _s ) by the current flowing through the primary winding (N _p ) . When the main switch (Q _m ) is turned off and the auxiliary switch (Q _s ) is turned on , the snubber capacitor (C _s ) is charged by a part of the energy stored in the leakage inductance (L _s ), and the snubber capacitor The energy charged in (C _s ) concentrates the magnetic flux formed in the core device (2) on the small cross section (11) of the second leg (5), and the second leg (5) After magnetic saturation, the auxiliary switch (Q _s ) is turned off.

When the main switch (Q _m ) is turned on and a current flows through the primary winding (N _p ), the second leg (5) is connected via the first leg (4) and the base (7). And magnetic flux (F1, F2) separated into the third leg (6) is generated in the core device (2). A second leg for winding a first secondary winding (N _s ) that extracts energy from the first secondary winding (N _s ) during a period in which voltage is applied to the primary winding (N _p ) Since the part (5) does not need to store energy in the second leg (5), the sectional area of the second leg (5) is the first leg (4) and the third leg. A half cross section of the portion (6) is sufficient, and a reduction in size and weight and cost reduction can be achieved. The magnetic flux density when energy is stored in the third leg (6) that stores sufficient energy in the core device (2) is sufficiently lower than the saturation magnetic flux density, and the main switch (Q _m ) is turned off. Then , after the current flowing through the primary winding (N _p ) stops, the second secondary winding (N _f ) wound around the first leg (4) or the third leg (6) ) Can extract the energy stored in the core device (2). A small cross section (11) smaller than the cross section of the third leg (6) is provided in the second leg (5), the main switch (Q _m ) is turned off, and the auxiliary switch (Q _s ) is turned on. sometimes, the flux portion of the energy stored in the leakage inductance (L _s) is charged to a snubber capacitor (C _s), the energy charged in the snubber capacitor (C _s), which is formed in the core unit (2) Are concentrated on the small cross section (11) of the second leg (5) and the second leg (5) is magnetically saturated, and then the auxiliary switch (Q _s ) is turned off. Thus, just before the auxiliary switch (Q _s) is turned off, the second leg (5) is magnetically saturated, to increase the amount of current flowing through the primary winding of the (N _p), auxiliary switch (Q _s ) Is turned off, soft switching can be achieved. Furthermore, by limiting the saturation location of the second leg (5), it is possible to control changes in saturation magnetism due to variations in the shape and characteristics of the core device (2) and changes in inductance during saturation.

  A predetermined amount of energy can be obtained from each of the first secondary winding and the second secondary winding of the reactor device even when one switching cycle is on and off.

Hereinafter, an embodiment of a reactor device according to the present invention will be described with reference to FIGS.
FIG. 3 is a cross-sectional view of a reactor device according to an embodiment of the present invention. As shown in the figure, this reactor device includes a first leg portion (4), a second leg portion (5), a third leg portion (6), and a magnetic circuit that are connected to each other in parallel. The base part (7) which comprises is provided. The coil device (3) includes a primary winding (N _p ) wound around the first leg (4) and a first secondary winding wound around the second leg (5). (N _s ) and a second secondary winding (N _f ) wound around the first leg (4) or the third leg (6). The second leg (5) has a small cross section (11) smaller than the cross section of the third leg (6). FIG. 4 shows an equivalent circuit (1) of the reactor device according to the present invention and an electric circuit of a switching power source to which the equivalent circuit of the reactor device is applied.

The reactor device (1) includes a transformer (T) having a primary winding (N _p ) and a secondary winding (N). One end of the primary winding (N _p ) is connected to the positive terminal of the DC power source (E _i ), and the other end of the primary winding (N _p ) is connected to the main switch (L _s ) via the leakage inductance (L _s ). Q _m ) is connected to one end. The other end of the main switch (Q _m ) is connected to the negative terminal of the DC power supply (E _i ), and the control terminal (gate) of the main switch (Q _m ) is connected to the control circuit (40). One end of the main switch (Q _m ) is connected to the positive terminal of the DC power supply (E _i ) via the auxiliary switch (Q _s ) and the snubber capacitor (C _s ), and controls the auxiliary switch (Q _s ). The terminal is connected to the control circuit (40).

The first leg (4) which is the main leg, the primary winding (N _p ) wound around the first leg (4), the second leg (5) which is the saturated leg, the second leg The first secondary winding (N _s ) and the base part (7) wound around the leg part (5) of the main part constitute the main transformer (T1), and the first leg part (4), the first leg part (5) The primary winding (N _p ) wound around the leg (4), the second secondary winding (feedback winding) (N _f ), and the base (7) constitute a feedback transformer (T2). . This means that when the second leg (5) is magnetically saturated, an equivalent circuit is formed in which a saturable reactor (SL) is connected in parallel to the first secondary winding (N _s ). Therefore, when this equivalent circuit is formed, the first secondary winding (N _s ) and the saturable reactor (SL) are passed through the output rectifier diode (D _o1 ) and the capacitor (C _o ) and the load (R _o ) and connected. The second secondary winding (N _f ) is connected to the capacitor (C _o ) and the load (R _o ) via the output rectifier diode (D _o2 ). The output voltage detection circuit (41) shown in FIG. 4 monitors the output voltage to the load (R _o ) and sends a detection signal corresponding to the output voltage to the control circuit (40) through the photocoupler (42). Thus, the control circuit (40) can control the pulse width of the drive signal to the main switch (Q _m ) and the auxiliary switch (Q _s ) according to the level of the detection voltage of the output voltage detection circuit (41).

  A perspective view of the reactor device (1) including the main transformer (T1) and the return transformer (T2) shown in FIG. 4 is shown in FIG. 1, and an exploded perspective view is shown in FIG.

The reactor device (1) includes a core device (2) and a coil device (3) wound around the core device (2), and the coil device (3) is integrally formed of an insulating resin. The first bobbin (22), the second bobbin (25), and the third bobbin (28) are provided. A first leg (4) is disposed in the first bobbin (22), and a primary winding (N _p ) is wound around the first bobbin (22). A second leg (5) is disposed in the second bobbin (25), and a first secondary winding (N _s ) is wound around the second bobbin (25). The first bobbin (22) is disposed in the third bobbin (28), and the second secondary winding (N _f ) is wound around the third bobbin (28). The core device (2) includes a first leg (4), a second leg (5), a third leg (6) that is a shunt leg, and a first leg that are arranged in parallel to each other. (4) A pair of E shapes in which the second leg portion (5) and the third leg portion (6) are connected to each other and the base portion (7) forming a magnetic circuit is formed symmetrically with each other. Has a core. In the present embodiment, the first leg portion (4) has a circular cross section, and is formed so as to protrude from a substantially central portion of the base portion (7). The second leg portion (5) and the third leg portion (6) respectively formed at one end and the other end of the base portion (7) have rectangular cross sections, but the second leg portion (5) is cut off. The area is in a range of 30% to 70% of the first leg (4) or the third leg (6), for example, approximately half of the third leg (6), and the first leg ( 4) has substantially the same cross-sectional area as the third leg (6).

  2 and 3 are a perspective view and a cross-sectional view taken along line AA showing an embodiment of the core for a reactor device according to the first embodiment of the present invention. The reactor device core (1) of this embodiment has, for example, a middle leg portion (2) made of a ferrite core and a pair of outer leg portions (3, 4) disposed on both sides of the middle leg portion (2). The leg portions (2, 3, 4) are arranged in parallel to each other.

As shown in FIG. 3, a small cross section (11) that is likely to cause magnetic saturation due to concentration of magnetic flux is formed by a notch (10) at the tip of each pair of second legs (5). As a whole, a small cross section (11) is formed at a substantially central portion in the length direction of the second leg portion (5). By limiting the saturation location of the second leg (5), it is possible to control the change in saturation time and the change in inductance during saturation due to variations in the shape and characteristics of the core device (2). Since the gap (12) is formed in the central portion of the third leg (6), the gap (12) gives the third leg (6) a characteristic that is difficult to saturate with respect to the DC magnetization. Energy can be stored in the third leg (6) by the magnetic flux diverted to the leg (6) of the first leg (6), and the gap (12) of the third leg (6) is connected to the primary winding (N _p ) Leakage inductance. Further, even if a gap (12) to the third leg (6), leaking out of the reactor apparatus by winding a second secondary winding (N _f) on the gap (12) Magnetic flux can be reduced to reduce external influences.

As shown in FIG. 2, the first bobbin (22) forms an inner cavity (20) and an inner cavity (20) for housing the first leg (4) and the primary winding (N _p ). An inner cylinder part (21) around which is wound is formed. The inner cylinder part (21) is formed in a cylindrical shape, and the primary winding (N _p ) is wound around it. A bent portion (36) is formed on the flange (35) at one end in order to stably arrange the reactor device (1). The second bobbin (25) forms a side cavity (26) that houses the second leg (5) and has a substantially rectangular cross-section around which the first secondary winding (N _s ) is wound. A flange portion (37) is formed at both ends of the side tube portion (27). The third bobbin (28) forms an outer cavity (23) that houses the inner cylindrical part (21) around which the primary winding (N _p ) is wound, and the second secondary winding (N _f ). The outer cylinder part (24) formed in the cylindrical shape which winds is formed. The inner cylindrical part (21) of the first bobbin (22) wound with the primary winding (N _p ) and the second bobbin (25) wound with the second secondary winding (N _f ) The outer cylinder part (24) is arranged concentrically with respect to the first leg part (4). The primary bobbin (22), the second bobbin (25), and the third bobbin (28) are provided with a primary winding (N _p ), a first secondary winding (N _s ), and a second secondary. The winding (N _f ) can be reliably arranged at a predetermined position. Since the arc-shaped recess (32) is formed in the outer cylinder (24) and the magnetic body (31) is disposed in the recess (32), the magnetic body (31) is attached to the first leg (4). It is inserted between the wound primary winding (N _p ) and the second secondary winding (N _f ).

Two or more recesses (32) are formed in the outer cylindrical portion (24) of the third bobbin (28) around which the second secondary winding (N _f ) is wound, and each recess (32) is magnetic. A body (31) can be placed. For example, as shown in FIG. 6, it is 90 degrees on an oblique diagonal line on the same circumference of the outer cylindrical portion (24) of the third bobbin (28) around which the second secondary winding (N _f ) is wound. The leakage inductance (L _s ) is adjusted to a predetermined value by arranging the magnetic body (31) in each of the four or less recesses (32) formed at equal angular intervals and increasing or decreasing the number of magnetic bodies to be inserted. At the same time, by providing four recesses (32) on the diagonal diagonal line, the outer shape does not increase even when the winding is swollen by the magnetic material.

A gap or magnetic material is provided between the primary winding (N _p ) and the second secondary winding (N _f ), and the gap or / and the magnetic Since the resonance current is generated with the capacitive component outside the reactor device depending on the length, area, and number, it can be adjusted to a stable predetermined leakage inductance. Also, flanges (38) (FIG. 2) are formed at both ends of the outer cylindrical portion (24), and a plurality of metal pins (39) serving as leads are planted under the flanges (38). A fixed base (40) is attached. As shown in FIG. 3, the primary winding wound between the primary winding (N _p ) and the outer cylindrical portion (24) of the third bobbin (28), that is, the first leg portion (4). A gap (30) (FIG. 8) is formed in a radial direction between the line (N _p ) and the second secondary winding (N _f ), and the primary winding (N _p ) and the feedback winding (N _An appropriate leakage inductance (L _s ) is formed between _f ), and a resonance current can be generated with the capacitor (C _s ) when the main switch (Q _m ) is turned off. Instead of the gap (30), a separator having an appropriate thickness may be provided. Further, by providing the gap (30), the stray capacitance between the primary winding (N _p ) and the feedback winding (N _f ) is reduced, and the effect of noise reduction is obtained. Since the magnetic flux generated in the first leg (4) is divided approximately equally into the second leg (5) and the third leg (6), the core cross-sectional area of the second leg (5) Is 1/2 of the first leg (4). The second leg (5) operates in the third quadrant of the BH curve shown in FIG. The cross-sectional area of the third leg (6) for storing energy is 1, and the first leg (the sum of the magnetic flux from the second leg (5) and the magnetic flux of the third leg (6) ( The cross-sectional area of 4) is set to 1 equivalent to the third leg (6). Alternatively, an insulator (not shown) such as insulating paper is disposed in the gap 30 (FIG. 8), and the insulator is placed on the primary winding (N _p ) wound around the inner cylinder portion (21). The second secondary winding (N _f ) is wound via the magnetic material (31) between the insulators disposed between the primary winding (N _p ) and the secondary winding (N _f ). ) And a leakage inductance depending on the thickness, length, or number of magnetic bodies (31), gaps or insulators arranged between the primary winding (N _p ) and the secondary winding (N _f ). (L _s ) can be adjusted.

  In this way, the main transformer (T1) is constructed by the first leg (4) and the second leg (5), and the first leg (4) and the third leg (6) Thus, when the feedback transformer (T2) that is a reactor for storing energy is constructed, the main transformer (T1) is half of the normal and the feedback transformer (T2) is considered to be equivalent, so the relative volume is Compared to forward type transformers and reactors, it is 2/3, and more than 30% can be realized.

Since the leakage inductance (L _s ) is formed between the primary winding (N _p ) and the feedback winding (N _f ), and is resonated with the capacitor (C _s ), the surge voltage of the feedback transformer (T2) In a multi-output power source that reduces and generates a plurality of outputs, the mutual controllability (cross regulation) between the outputs is good. This prevents an increase in the number of secondary side parts required for improving controllability, and is effective in reducing the number of parts, mounting area, and loss. As shown in FIGS. 1 and 2, the reactor device of the present invention is configured by a fitting bobbin structure of a core device (2) and a coil device (3), and the primary winding (N _p ) is a first winding. The second secondary winding (feedback winding) (N _f ) is wound around a third bobbin (28) different from the first bobbin (22), and the first secondary winding (feedback winding) (N _f ) is wound around the first bobbin (22). An appropriate leakage inductance between the primary winding (N _p ) and the second secondary winding (N _f ) is obtained by fitting the bobbin (22) to the third bobbin (28). A feedback transformer (T2) having a small stray capacity can be created.

When the main switch (Q _m ) is turned on by the drive signal from the control circuit (40), the primary winding (N _p ), leakage inductance (L _s ) of the main transformer (T1) from the DC power source (E _i ) a main switch (Q _m) and as current flows through a primary winding (N _p) at the same time energy is stored in the leakage inductance (L _s) by the current flowing through the feedback transformer from the DC power supply (E _i) (T2 ) Primary winding (N _p ), leakage inductance (L _s ) and resonance current flows through the main switch (Q _m ), and the current flowing through the primary winding (N _p ) causes leakage inductance (L _s ). Energy is stored. When current flows through the primary winding (N _p ), the magnetic flux (F) generated in the first leg (4) is shown in the H-B graphs (A), (B), and (C) of FIG. Thus, one magnetic flux (F1) passing through the first leg (4), the base (7) and the second leg (5), the first leg (4), the base (7) and the first leg It is divided into the other magnetic flux (F2) passing through the three leg portions (6). One magnetic flux (F1) passing through the second leg (5) generates a forward current in the first secondary winding (N _s ) with respect to the output rectifier diode (D _o1 ). The current flowing through the secondary winding (N _s ) of the first rectifier is rectified by the output rectifier diode (D _o1 ), stored in the capacitor (C _o ), and flows to the load (R _o ). However, since a reverse current is generated in the second secondary winding (N _f ) with respect to the output rectifier diode (D _o2 ), no current flows in the second secondary winding (N _f ). .

Together with a control circuit (40) stops the drive signal to the main switch (Q _m), when sending a drive signal to the auxiliary switch (Q _s), auxiliary switch (Q _s) is turned on. When the main switch (Q _m ) is turned off, the energy stored in the third leg (6) is obtained from the second secondary winding (feedback winding) (N _f ) constituting the feedback transformer (T2). It is rectified by the output rectifier diode (D _o2 ), accumulated in the capacitor (C _o ), and flows to the load (R _o ). Also, during on of the auxiliary switch (Q _s), a portion of the energy stored in the leakage inductance (L _s), is charged to the snubber capacitor (C _s). Due to this energy, the second leg (5) is demagnetized in the saturation direction, and immediately before the auxiliary switch (Q _s ) is turned off , the second leg (5) is magnetically saturated, and the primary winding. After increasing the current flowing through the line (N _p ), the auxiliary switch (Q _s ) is turned off to achieve soft switching.

In the embodiment of the present invention, energy is extracted from the first secondary winding (N _s ) during a period in which a voltage is applied to the primary winding (N _p ), so there is no need to store energy. The cross-sectional area of the second leg (5) winding the secondary winding (N _s ) of the second leg (5) is half the cross section of the first leg (4) and the third leg (6). The size and weight can be reduced and the cost can be reduced. The magnetic flux density when energy is accumulated in the third leg (6) that accumulates sufficient energy in the core device (2) is sufficiently lower than the saturation magnetic flux density, and the primary winding (N _p ). After the current flowing in the core stops, it is accumulated in the core device (2) from the second secondary winding (N _f ) wound around the first leg (4) or the third leg (6). Energy can be extracted.

Further, when a current flows through the primary winding (N _p ) wound around the first leg (4), the current is taken out from the first secondary winding (N _s ), and 1 of the core device (2). When no current flows through the secondary winding (N _p ), the energy stored in the core device (2) is taken out from the second secondary winding (N _f ), so that it is wound around the second leg (5). Applied to the primary winding (N _p ) from the rotated first secondary winding (N _s ) and the second secondary winding (N _f ) wound around the first leg (4) One cycle of energy can be extracted.

The embodiment of the present invention can be modified. For example, instead of winding the second secondary winding (N _f ) around the first leg (4), it may be wound around the third leg (6). The first leg (4), the second leg (5), and the third leg (6) are not arranged in a straight line, but at the same or different angles or different circumferences at an angle of 120 degrees. You may arrange | position three-dimensionally on it.

  The present invention can be applied to a switching power supply in addition to a reactor device.

The perspective view which shows the reactor apparatus by this invention 1 is an exploded perspective view of the reactor device of FIG. Cross-sectional view of core device with coil device and graph showing HB characteristics The circuit diagram of the switching power supply which applies the reactor apparatus by this invention Sectional drawing of the 1st leg part of the reactor apparatus of this invention Sectional drawing of the 1st leg part which shows other embodiment of this invention The perspective view which shows other embodiment of the bobbin used for the reactor apparatus by this invention Sectional drawing which shows other embodiment of the coil | winding structure shown in FIG. Cross-sectional view of a conventional reactor device Perspective view of conventional core device

Explanation of symbols

(2) ・ ・ Core device, (3) ・ Coil device, (4) ・ ・ First leg, (5) ・ ・ Second leg, (6) ・ ・ Third leg, ( 7) ・ ・ Base, (N _p ) ・ ・ Primary winding, (N _s ) ・ ・ First secondary winding, (N _f ) ・ ・ Second secondary winding, (11) ・ ・Small section, (20) ・ ・ Internal cavity, (21) ・ ・ Inner cylinder, (22) ・ ・ First bobbin, (25) ・ ・ Second bobbin, (26) ・ ・ Internal cavity, ( 27) ・ ・ Inner cylinder, (28) ・ ・ Third bobbin, (30) ・ ・ Gap, (31) ・ ・ Magnetic material, (32) ・ ・ Recess, (34) ・ ・ Side cavity,

Claims (17)

A core device and a coil device wound around the core device;
The core device connects the first leg, the second leg, the third leg, and the first leg, the second leg, and the third leg that are arranged in parallel to each other. A base for forming a magnetic circuit,
The coil device includes a primary winding wound around the first leg, a first secondary winding wound around the second leg, and the first leg or first A second secondary winding wound around the leg 3;
One end of the primary winding is connected to one end of a DC power source, and the other end of the primary winding is connected to the other end of the DC power source via a leakage inductance and a main switch,
A connection point between the leakage inductance and the main switch is connected to one end of the DC power source via an auxiliary switch and a snubber capacitor,
The second leg has a small cross-sectional portion smaller than the cross-sectional area of the third leg,
When the main switch is turned on while the auxiliary switch is off, a current flows from the DC power source through the primary winding, leakage inductance, and main switch, and the leakage flows by the current flowing through the primary winding. Energy is stored in the inductance,
When the main switch is turned off and the auxiliary switch is turned on, the snubber capacitor is charged by a part of the energy stored in the leakage inductance, and the energy charged in the snubber capacitor is used for the core device. A reactor device , wherein the magnetic flux to be formed is concentrated on a small cross section of the second leg, and the second leg is magnetically saturated, and then the auxiliary switch is turned off .   The reactor device according to claim 1, wherein a cross-sectional area of the second leg portion is in a range of 30% to 70% of the first leg portion or the third leg portion.   The reactor device according to claim 1, wherein a small cross-sectional portion that is likely to cause magnetic saturation due to concentration of magnetic flux is formed in the second leg portion.   The reactor apparatus of any one of Claims 1-3 which provided the clearance gap in a part of said 3rd leg part.   The primary leg wound around the first leg, the second leg and the base, and the first leg, and the first secondary winding wound around the second leg are: A primary winding wound around the first leg, the third leg and the base, and the first leg constituting the main transformer, and the first leg or the third leg The reactor device according to claim 1, wherein the second secondary winding wound around the portion constitutes a feedback transformer. Winding the primary winding and the second secondary winding around the first leg,
Winding the first secondary winding around the second leg;
The reactor apparatus of Claim 1 which takes out the energy of 1 cycle applied to the said primary winding from the said 1st secondary winding and the said 2nd secondary winding.   The resonance current is generated by applying a predetermined leakage inductance to a gap formed between the primary winding and the second secondary winding wound around the first leg. Reactor device.   The reactor apparatus of Claim 7 which inserted the magnetic body between the primary winding wound by the said 1st leg part, and the 2nd secondary winding. The coil device includes an inner cavity that accommodates the first leg and a first bobbin that forms the inner cavity and forms an inner cylinder that winds the primary winding;
A second bobbin forming a side cavity for accommodating the second leg and having a side tube for winding the first secondary winding;
2. A third bobbin that forms an outer cavity that accommodates the inner cylindrical portion around which the primary winding is wound, and that forms an outer cylindrical portion around which the second secondary winding is wound. The reactor apparatus as described in.   The inner cylindrical portion of the first bobbin wound with the primary winding and the outer cylindrical portion of the third bobbin wound with the second secondary winding are the first leg portions. The reactor device according to claim 9, wherein both are arranged concentrically.   The reactor device according to claim 9 or 10, wherein a concave portion is formed in an outer cylindrical portion of the third bobbin around which the second secondary winding is wound, and a magnetic body is disposed in the concave portion.   The reactor device according to claim 11, wherein two or more concave portions are formed in an outer cylindrical portion of the third bobbin around which the second secondary winding is wound, and a magnetic body is disposed in each of the concave portions. .   Each of the four or less recesses formed at equal angular intervals of 90 degrees on the same circumferential diagonal of the outer cylindrical portion of the third bobbin that winds the second secondary winding The reactor apparatus of Claim 11 or 12 which has arrange | positioned the body. The coil device includes an inner cavity that accommodates the first leg and a first bobbin that forms the inner cavity and forms an inner cylinder that winds the primary winding;
A second bobbin forming a side cavity for accommodating the second leg and having a side cylinder for winding the first secondary winding; and a side for accommodating the third leg A third bobbin having a side tube portion forming a cavity and winding the second secondary winding;
The reactor apparatus according to claim 1, wherein one cycle of energy is extracted from the first secondary winding and the second secondary winding. The coil device includes an inner cavity that accommodates the first leg and a first bobbin that forms the inner cavity and forms an inner cylinder that winds the primary winding;
A second bobbin that forms a side cavity that accommodates the second leg and has a side cylinder that winds the first secondary winding;
The reactor apparatus of Claim 1 which wound the said 2nd secondary winding via the insulator on the said primary winding wound around the said inner side cylinder part.   The reactor apparatus of Claim 15 which has arrange | positioned the magnetic body between the insulators arrange | positioned between the said primary winding and the said secondary winding.   The reactor device according to claim 11 or 16, wherein a leakage inductance is adjusted by a thickness, a length, or a number of a magnetic body inserted between the primary winding and the secondary winding.

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