JP2012080011A - High frequency transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency transformer in which the degree of coupling of a primary coil and a secondary coil is high.SOLUTION: The high frequency transformer comprises a plurality of primary coils 1A formed by performing edgewise winding of a rectangular wire a plurality of times, and a plurality of secondary coils 2A formed by performing edgewise winding of a rectangular wire a plurality of times. The plurality of primary coils 1A and the plurality of secondary coils 2A are connected, respectively, in series or parallel and arranged alternately so that the secondary coil 2A is inserted between the primary coils 1A concentrically thereto and the primary coils 1A are arranged at both ends.

Description

  It is an object of the present invention to provide a high-frequency transformer having a high degree of coupling between a primary coil and a secondary coil in a high-frequency transformer for high voltage or large current.

  A gap substantially equal to the thickness of the flat conductor is provided between the two edgewise coils 1a and 1b, and the flat conductor layers of the separate edgewise coils 1a and 1b are alternately inserted into the core in the gap. Thus, there is a transformer that reduces leakage inductance and improves coupling. In this transformer, insulation of the flat winding is enhanced (Patent Document 1).

  Further, spacers 2 provided with notches so as to be fitted to the corners of the core 1 on the side in contact with the core 1 are attached to the four corners of the core 1, and the primary winding 3 and the secondary winding 4 wound in a coil shape. There is a transformer formed by sandwiching a flat winding so that one of the spacers 2 in the longitudinal direction of the cross section is inserted into a comb-shaped recess provided on a side surface holding the winding (Patent Document 2).

  In the transformer, the primary winding 3 and the secondary winding 4 are held at a predetermined interval by the convex portion of the spacer 2, and the winding and the core 1 are insulated by the main body portion of the spacer 2, A gap is maintained. Furthermore, by causing cooling air to flow between the windings and between the windings and the core 1, the temperature rise of the transformer can be suppressed.

JP 2004-103624 A JP 2006-147927 A

  However, in the transformers described in Patent Documents 1 and 2, since the edgewise coils 1a and 1b are each composed of a rectangular wire having the same width and thickness, a high voltage alternating current is input to the primary coil. If you want to output a large current alternating current from the secondary coil, or if you want to output a high voltage alternating current from the secondary coil side by inputting a large current alternating current to the primary coil, it is difficult to respond. There is a problem that there is.

  In these transformers, it is conceivable to increase the thickness and width of the rectangular wires constituting the primary coil and the secondary coil to allow a large amount of current to flow. When a high-frequency current is passed through the primary coil and the secondary coil, There is a problem that current is difficult to flow due to the skin effect.

  In these transformers, the winding of the primary coil and the winding of the secondary coil are alternately inserted through the core, so that leakage inductance is large at both ends of the primary coil and the secondary coil. Become. Therefore, the degree of coupling between the primary coil and the secondary coil is significantly smaller than 1. Therefore, there is a problem that the energy transfer rate from the primary side to the secondary side is significantly smaller than 100%, and the loss at the time of energy transfer is large.

  The present invention has been made to solve the above problem, and since the leakage inductance is minimal and the coupling rate is as close to 1 as possible, the loss at the time of energy transfer from the primary side to the secondary side is minimal. An object is to provide a high-frequency transformer.

  The invention according to claim 1 includes a plurality of primary coils in which a rectangular wire is edgewise wound a plurality of times, and a plurality of secondary coils in which a rectangular wire is edgewise wound a plurality of times, and the plurality of primary coils The plurality of secondary coils are connected in series or in parallel, and the primary coil and the secondary coil are concentric with the primary coil between the primary coil and the secondary coil. The high frequency transformer is alternately arranged so as to be inserted, and both ends are the primary coil.

  The invention according to claim 2 relates to the high frequency transformer according to claim 1, wherein the number of primary coils is four or more and the number of secondary coils is three or more.

  The invention according to claim 3 relates to the high-frequency transformer according to claim 1 or 2, wherein the number of winding turns of the rectangular wire of the primary coil is larger than the number of winding turns of the secondary coil.

  The invention according to claim 4 includes a plurality of primary coils in which a rectangular wire is wound edgewise a plurality of times, and a plurality of secondary coils in which a rectangular wire is wound edgewise a plurality of times, and the plurality of primary coils The secondary coils are connected in series or in parallel, and the primary coil and the secondary coil are concentric with the secondary coil between the primary coil and the secondary coil. The high frequency transformer is alternately arranged so as to be inserted, and both ends thereof are the secondary coils.

  The invention according to claim 5 relates to the high-frequency transformer according to claim 4, wherein the number of primary coils is three or more and the number of secondary coils is four or more.

  The invention according to claim 6 relates to the high-frequency transformer according to claim 4 or 5, wherein the number of winding turns of the rectangular wire of the secondary coil is larger than the number of winding turns of the primary coil.

  The invention according to claim 7 relates to the high-frequency transformer according to any one of claims 1 to 6, wherein an insulating member is inserted between the primary coil and the secondary coil.

  The invention according to claim 8 relates to the high-frequency transformer according to claim 7, wherein the insulating member is an insulating piece, and the insulating piece is held at a predetermined interval in the thickness direction by an insulating piece holding member.

  According to a ninth aspect of the present invention, in the flat wire constituting the primary coil and the flat wire constituting the secondary coil, at least one of width and thickness is different from each other. The high frequency transformer described in 1.

  The invention according to claim 10 relates to the high-frequency transformer according to any one of claims 1 to 9, wherein both the primary coil and the secondary coil are inserted into the same ferrite core.

  The invention according to claim 11 relates to the high-frequency transformer according to claim 10, wherein the ferrite core is an outer iron type core.

  The invention according to claim 12 relates to the high-frequency transformer according to claim 10, wherein the ferrite core is an inner iron core.

  According to a thirteenth aspect of the invention, the ferrite core is formed of ferrite and is formed of ferrite that connects three columnar cores arranged at equal intervals on the circumference and one end of the columnar core. A top plate and a bottom plate made of ferrite that connects the other end of the columnar core, and a plurality of primary coils and a plurality of secondary coils are inserted through the columnar cores to form a primary coil assembly. 11. The high-frequency transformer according to claim 10, wherein the secondary coil assembly is configured and the primary coil assembly and the secondary coil assembly are respectively Y-connected or Δ-connected.

  In the high-frequency transformer according to claim 1, both the primary coil and the secondary coil are formed by edgewise winding a rectangular wire a plurality of times. The primary coils and the secondary coils are alternately arranged, and the primary coils are disposed at both ends. Accordingly, when a high-frequency current is passed through the primary coil, a uniform magnetic field formed by the primary coil passes through the secondary coil, so that the leakage inductance can be minimized. As a result, the degree of coupling between the primary coil and the secondary coil is as close to 1 as possible, so the energy transfer rate from the primary coil to the secondary coil is almost 100%, and energy is transferred from the primary coil to the secondary coil. The loss at the time of transition can be minimized.

  Further, since the primary coil and the secondary coil are connected in series or in parallel, respectively, when outputting a high voltage current with a low voltage and a large current and when outputting a high frequency current with a high voltage and a small current, Yes.

  The high-frequency transformer according to claim 2 is characterized in that it has two or three primary coil portions and is excellent in conversion efficiency as compared with a high-frequency transformer having one or two secondary coils.

  Since the number of turns of the primary coil is greater than the number of turns of the secondary coil, the high-frequency transformer according to claim 3 is suitable as a high-frequency transformer that outputs a high-frequency high-frequency current.

  Also in the high-frequency transformer according to claim 4, both the primary coil and the secondary coil are formed by edgewise winding a rectangular wire, and the primary coil and the secondary coil are alternately arranged. Has been. However, unlike the high frequency transformer of claim 1, secondary coils are arranged at both ends. However, it is considered that the magnetic field from the primary coil passes even through the secondary coils arranged at both ends by taking more turns of the secondary coil than the turns of the primary coil. The high-frequency transformer is preferably used for a purpose of outputting a high-voltage high-frequency current.

  The high-frequency transformer according to claim 5 is characterized in that the conversion efficiency is excellent as compared with a high-frequency transformer having one or two primary coils and two or three secondary coils.

  The high-frequency transformer according to claim 6 is suitable as a high-frequency transformer for outputting a high-frequency high-frequency current because the number of turns of the secondary coil is larger than the number of turns of the primary coil.

  In the high-frequency transformer according to claim 7, since the insulating member is inserted between the primary coil and the secondary coil, the high-frequency transformer in which the insulating member is not inserted between the primary coil and the secondary coil. Compared with the transformer, the insulation distance between the primary coil and the secondary coil is kept constant, and the insulation between the primary coil and the secondary coil becomes more reliable.

  In the high-frequency transformer according to claim 8, since the insulating member is an insulating piece and is held at a predetermined interval in the thickness direction by the insulating piece holding member, the insulation not held by the insulating piece holding member Compared with the case where a piece is used, the operation of inserting the insulating piece between the primary coil and the secondary coil is facilitated.

  In the high-frequency transformer according to claim 9, since the rectangular wire constituting the primary coil and the rectangular wire constituting the secondary coil are different in at least one of width and thickness, for example, the secondary coil Is larger than the current of the primary coil, at least one of the width and thickness of the rectangular wire of the secondary coil is made larger than the rectangular wire of the primary coil, and conversely Is larger than the current of the secondary coil, at least one of the width and thickness of the rectangular wire of the primary coil is made larger than the rectangular wire of the secondary coil. The width and thickness of the rectangular wire can be set according to the current flowing through the secondary coil. Thus, it can be set as the high frequency transformer adapted to various different input-output conditions.

  In the high frequency transformer of claim 10, since the ferrite core is used as the core, the loss when the core is used at a high frequency is small as compared with a transformer in a form in which silicon steel plates for transformers are laminated.

  In the high frequency transformer according to claim 11, since the ferrite core is an outer iron type core, the ratio of the core to the coil is larger than that of the high frequency transformer in which the ferrite core is an inner iron type core, and the property as an iron machine is increased. Becomes stronger. Therefore, it is suitable for an application in which the number of turns of the primary coil and the secondary coil is small, particularly for a high-frequency inverter (about 50 kHz to 1 MHz).

  In the high frequency transformer according to claim 12, since the ferrite core is an inner iron type core, the ratio of the core to the coil is smaller than that of the high frequency transformer in which the ferrite core is an outer iron type core, and the properties as a copper machine are obtained. Becomes stronger. Therefore, it is possible to increase the number of turns of the primary coil and the secondary coil. In particular, when frequency control is performed like a parallel resonance type inverter or a series resonance type inverter, there is a margin in the density of magnetic flux passing through the core. It is suitable for widening the control range up to a low frequency (about 10 kHz to 200 kHz).

  Since the high-frequency transformer of claim 13 is a three-phase high-frequency transformer, if the leg core into which the primary coil, the secondary coil, and the winding are inserted is the same, it has a capacity three times that of the single-phase high-frequency transformer. is doing. Therefore, it is suitable as a large-capacity power conversion device and a large-capacity power supply device. In the output of the secondary side rectifier circuit, the basic pulse rate is 48% for single-phase high-frequency transformers in the full-wave rectifier circuit, but 4.2% for single-phase high-frequency transformers in the three-phase high-frequency transformer. 1/10 or less. Therefore, the filter used for reducing the output ripple may be a small capacity filter.

  Since the filter can be made small in this way, the energy stored in the filter is also reduced. As a result, the discharge energy at the time of output short circuit becomes very small, so when used in a large capacity DC sputtering power supply device, it is possible to minimize damage to the product due to arc discharge that occurs during sputtering. The yield can be improved.

  Further, a primary coil assembly composed of a plurality of primary coils inserted through the columnar core and a secondary coil assembly composed of a plurality of secondary coils inserted through the columnar core are both Y-connection or Δ-connection can be made. Further, the primary coil assembly is Y-connected, the secondary coil assembly is Y-connected, the primary coil assembly is Δ-connected, and the secondary coil assembly is Y-connected, The primary coil assembly is Y-connected, the secondary coil assembly is Δ-connected, and the primary coil assembly and secondary coil assembly are both Δ-connected to the high-frequency transformer. Is included.

FIG. 1 is a front view, a side view, and a rear view of the high-frequency transformer according to the first embodiment. FIG. 2 is a plan view of the high-frequency transformer according to the first embodiment. FIG. 3 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the first embodiment. FIG. 4 is a front view, a side view, and a rear view of another example of the high-frequency transformer according to the first embodiment. FIG. 5 is a plan view of the high-frequency transformer shown in FIG. FIG. 6 is a wiring diagram showing the connection of the primary coil and the secondary coil in the high-frequency transformer shown in FIG. FIG. 7 is a front view, a side view, and a rear view of the high-frequency transformer according to the second embodiment. FIG. 8 is a plan view of the high-frequency transformer according to the second embodiment. FIG. 9 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the second embodiment. FIG. 10 is a front view, a side view, and a rear view showing another example of the high-frequency transformer according to the second embodiment. FIG. 11 is a plan view of the high-frequency transformer shown in FIG. 12 is a wiring diagram showing the connection of the primary coil and the secondary coil in the high-frequency transformer shown in FIG. FIG. 13 is a front view, a side view, and a rear view of the high-frequency transformer according to the third embodiment. FIG. 14 is a plan view of the high-frequency transformer according to the third embodiment. FIG. 15 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the third embodiment. FIG. 16 is a front view, a side view, and a rear view of the high-frequency transformer according to the fourth embodiment. FIG. 17 is a plan view of the high-frequency transformer according to the fourth embodiment. FIG. 18 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the fourth embodiment. FIG. 19 is a front view, a side view, and a rear view of the high-frequency transformer according to the fifth embodiment. FIG. 20 is a plan view of the high-frequency transformer according to the fifth embodiment. FIG. 21 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the fifth embodiment. FIG. 22 is a front view, a side view, and a rear view of the high-frequency transformer according to the sixth embodiment. FIG. 23 is a plan view of the high-frequency transformer according to the sixth embodiment. FIG. 24 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the sixth embodiment. FIG. 25 is a front view, a side view, and a rear view of the high-frequency transformer according to the seventh embodiment. FIG. 26 is a plan view of the high-frequency transformer according to the seventh embodiment. FIG. 27 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the seventh embodiment. FIG. 28 is a front view, a side view, and a rear view of the high-frequency transformer according to the eighth embodiment. FIG. 29 is a plan view of the high-frequency transformer according to the eighth embodiment. FIG. 30 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the eighth embodiment. FIG. 31 is a front view, a side view, and a rear view of the high-frequency transformer according to the ninth embodiment. FIG. 32 is a plan view of the high-frequency transformer according to the ninth embodiment. FIG. 33 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the ninth embodiment. FIG. 34 is a plan view of the high-frequency transformer according to the tenth embodiment. FIG. 35 is a side view of the high-frequency transformer according to the tenth embodiment as viewed from the direction of arrow D in FIG. FIG. 36 is a side view of the high-frequency transformer according to the tenth embodiment when viewed from the direction of arrow C in FIG. FIG. 37 is a side view of the high-frequency transformer according to the tenth embodiment as viewed from the direction of arrow B in FIG. FIG. 38 is a wiring diagram illustrating connections between the primary coil and the secondary coil in the high-frequency transformer according to the tenth embodiment.

1. Embodiment 1
First, an example of the high frequency transformer of the present invention having an inner iron type core will be described.
As shown in FIGS. 1 and 2, the high-frequency transformer 10 of the first embodiment includes two cylindrical cores 3 </ b> A, and an inner iron type ferrite core 3 that is configured in a square shape as a whole, and two Primary coil assembly 1 and secondary coil assembly 2 inserted into each of the cores 3A.

  The primary coil assembly 1 is configured by connecting four primary coils 1A in series, and the secondary coil is configured by connecting three secondary coils 2A in series. In the primary coil assembly 1, the primary coils 1 </ b> A are arranged so as to be spaced apart from each other so that the secondary coil 2 </ b> A can be inserted. In the secondary coil assembly 2, each of the secondary coils 2 </ b> A is arranged. The primary coil 1A is arranged so as to be separated by an interval at which the primary coil 1A can be inserted. The primary coil 1A and the secondary coil 2A are arranged such that the secondary coil 2A is inserted between the primary coils 1A.

  As shown in FIG. 1, the primary coil 1 </ b> A and the secondary coil 2 </ b> A are each configured by winding, for example, three turns edgewise on a rectangular wire whose surface is insulated. Here, edgewise winding refers to a winding method in which a flat wire is wound along its width direction. However, as shown in FIGS. 1 and 2, in the secondary coil 2A, a rectangular wire having a larger width and thickness than the primary coil 1A is used.

  Note that the number of turns of the primary coil 1A and the secondary coil 2A is not necessarily the same, and is based on the ratio of the high-frequency current input to the primary coil assembly 1 and the high-frequency current output from the secondary coil. Can be decided. When the high-frequency transformer 10 is for outputting a large current and high frequency, for example, the number of turns of the primary coil 1A may be 7 turns, and the number of turns of the secondary coil 2A may be 2 turns. The number of turns of the two primary coils 1A located at both ends of the coil is 6 turns, the number of turns of the two primary coils 1A located at the center is 8 turns, and the number of turns of the secondary coil 2A is 2 turns. It is good. In FIG. 1 and the following drawings, the primary coil 1A and the secondary coil 2A are both expressed so that the rectangular wires are in close contact with each other, but in reality, a gap is provided between adjacent rectangular wires. Yes. The same applies to the second and subsequent embodiments.

  As shown in FIGS. 1 and 2, the start and end portions of the primary coil 1A are drawn to the outside of the primary coil 1A to form a lead wire 1B, and similarly the start and end portions of the secondary coil 2A. Is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  Of the four primary coils 1A, the lead-out line 1B of the first stage from the top is connected to the lead-out line 1B of the start-end side of the first-stage primary coil 1A from the top, and two stages from the top The lead wire 1B on the terminal end side of the primary coil 1A of the eye is connected to the lead wire 1B on the start end side of the primary coil 1A in the third stage from the top. The lead-out line 1B on the terminal end side of the primary coil 1A at the third stage from the top is connected to the lead-out line 1B on the start end side of the primary coil 1A at the fourth stage from the top. Thereby, the four primary coils 1A are connected in series.

  Similarly, also in the secondary coil 2A, the lead-out line 2B on the terminal side of the secondary coil 2A in the first stage from the top is connected to the lead-out line 2B in the second stage from the top, and the second-stage coil 2A from the top. The lead wire 2B on the terminal end side of the secondary coil 2A is connected to the lead wire 2B of the secondary coil 2A in the third stage from the top. Thereby, the three secondary coils 2A are connected in series.

  The connection between the lead wires 1B in the primary coil 1A and the connection between the lead wires 2B in the secondary coil 2A can be performed by known means. Specific examples of such means include soldering, brazing, and rivet caulking.

  As shown in FIGS. 1 and 2, an insulating member 7 is inserted between the primary coil assembly 1 and the secondary coil assembly 2 and the core 3 </ b> A of the inner iron type ferrite core 3. An insulating piece 7A extends outward from the insulating member 7, and this insulating piece 7A is inserted between the primary coil 1A and the secondary coil 2A. In the high frequency transformer 1, the insulating member 7 may be inserted from the outside of the primary coil 1A and the secondary coil 2A.

  In the high frequency transformer 1 of the first embodiment, in the single core 3A, the primary coil 1A and the secondary coil 2A are alternately inserted through the core, and the primary coil 1A is disposed at both ends. The primary coil assembly 1 has a larger number of turns than the secondary coil assembly 2, and a high-frequency small current high-frequency current input to the primary coil assembly 1 is transferred from the secondary coil assembly 2 to a large current. Even when output as a high-frequency current, the primary coil 1A and the secondary coil 2A generate little heat.

  Further, since the primary coil 1A and the secondary coil 2A have the same inner diameter and are arranged concentrically, the primary coil 1A and the secondary coil 2A are arranged concentrically when the inner diameters are different. The degree of coupling between the primary coil assembly 1 and the secondary coil assembly 2 is high and the magnetic flux leakage is even smaller than when there is no magnetic flux. Therefore, it is more suitable for a large capacity power converter and a large capacity power supply.

  Further, compared with a high-frequency transformer in which two or three primary coils 1A are inserted in one core 3A and one or two secondary coils 2A are inserted in one core 3A. Excellent conversion efficiency.

  In addition, since the insulating piece 7A of the insulating member 7 is inserted between the primary coil 1A and the secondary coil 2A, the insulating member 7 is not inserted between the primary coil 1A and the secondary coil 2A. Insulation between the primary coil 1A and the secondary coil 2A is more reliable as compared with the high-frequency transformer.

  In the secondary coil 2A, a rectangular wire having a width and thickness larger than that of the primary coil 1A is used. Therefore, a secondary coil assembly is obtained by inputting a high-voltage small-current high-frequency current to the primary coil assembly 1. 2 is suitable as a high-frequency transformer for extracting a high-frequency current of a large current from 2.

  In addition, since the inner iron type ferrite core 3 is used as the core, the loss when used at a high frequency is reduced compared to the case of using an iron core made of a silicon steel plate or the like. Moreover, the ratio of the core with respect to the primary coil assembly 1 and the secondary coil assembly 2 becomes small, and the property as a copper machine becomes strong. Therefore, it is possible to increase the number of turns of the primary coil and the secondary coil. In particular, when frequency control is performed like a parallel resonance type inverter or a series resonance type inverter, there is a margin in the density of magnetic flux passing through the core. It is suitable for widening the control range up to a low frequency (about 10 kHz to 200 kHz).

2. Embodiment 2
Another example of a high-frequency transformer having an inner iron core will be described below.
In the high frequency transformer 20 of the second embodiment, as shown in FIGS. 7 to 9, all eight primary coils 1 </ b> A constituting the two sets of primary coil assemblies 1 are connected in series. On the other hand, all of the six secondary coils 2A constituting the two sets of secondary coil assemblies 2 are connected in parallel.

  As shown in FIGS. 7 and 8, the starting end and the terminating end of the primary coil 1A are drawn out to the outside of the primary coil 1A to become a lead wire 1B, and similarly the starting end and the terminating end of the secondary coil 2A Each part is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  In the inner iron type ferrite core 3, one of the lead wires 2B of the three secondary coils 2A inserted in each core 3A is the first crossing bar 2C, and the other lead wire 2B is the second crossing bar. Connected to 2C. The transition bars 2C are all plate-shaped conductors. The lead wire 2B may be connected to the crossover bar 2C by bending the end of the lead wire 2B upward as shown in FIGS. 7 and 8, and screwing the bent portion to the crossover bar 2C. A slit-like opening for inserting the lead wire 2B may be formed in the bar 2C, and the lead wire 2B may be inserted into the opening and fixed by soldering or brazing. As a result, all six secondary coils 2A are connected in parallel.

  Further, as shown in FIGS. 10 and 11, each of the lead wires 2B of the three secondary coils 2A inserted into one of the two cores 3A in the inner iron type ferrite core 3 is connected by a crossover bar 2D. By connecting each of the lead wires 2B of the three secondary coils 2A inserted into the other of the two cores 3A with a crossover bar 2E, first, three secondary coils 2A are connected in parallel, and the crossover bar 2D The upper end of one of the two crossing rods 2E is connected by a crossing bar 2F, and the other end of the crossing rod 2D and the bottom end of the crossing bar 2E are connected by a crossing bar 2G, and three secondary coils The secondary coil assembly 2 composed of 2A may be connected in parallel.

  The high-frequency transformer 20 is the same as the high-frequency transformer 10 of the first embodiment except for the above points. Accordingly, the eight primary coils 1A are connected in series by the lead wire 1B in the same manner as the high-frequency transformer 10 of the first embodiment. The primary coil 1A, the secondary coil 2A, the inner iron type ferrite core 3 and the insulating member 7 are as described in the first embodiment.

  In addition to the features of the high-frequency transformer 10 of the first embodiment, the high-frequency transformer 20 includes all eight primary coils 1A constituting the two primary coil assemblies 1 connected in series, and two secondary coil assemblies. Since the six secondary coils 2A constituting the body 2 are all connected in parallel, a high voltage high frequency current is input to the primary coil assembly 1 and a low voltage high current high frequency current is output from the secondary coil. It has the feature that it is particularly preferable for the application to be made.

3. Embodiment 3
Another example of the high frequency transformer having the inner iron core will be described below.
In the high-frequency transformer 30 of the third embodiment, as shown in FIGS. 13 to 15, the four primary coils 1 </ b> A constituting the primary coil assembly 1 and the three coils constituting the secondary coil assembly 2 are arranged. The secondary coils 2A are connected in parallel. Further, the primary coil assemblies 1 and the secondary coil assemblies 2 are also connected in parallel.

  As shown in FIG. 13 and FIG. 14, the starting end and the terminating end of the primary coil 1A are drawn out to the outside of the primary coil 1A to become a lead wire 1B, and similarly the starting end and the terminating end of the secondary coil 2A Each part is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  As shown in FIGS. 13 and 14, each of the lead wires 1B of the four primary coils 1A inserted into one of the two cores 3A in the inner iron type ferrite core 3 is connected by a crossover bar 1D. Each of the lead wires 1B of the four primary coils 1A inserted into the other of the three cores 3A is connected by a crossing bar 1E, and one of the two crossing bars 1D and one of the two crossing bars 1E The upper end is connected by a cross bar 1F. Thereby, the four primary coils 1A which comprise the primary coil assembly 1 are connected in parallel. And the primary coil assembly 1 is also connected in parallel by connecting the lower end of the other of the cross bar 1D and the other end of the cross bar 1E with the cross bar 1G.

  Similarly, each of the lead wires 2B of the three secondary coils 2A inserted into one of the two cores 3A in the inner iron type ferrite core 3 is connected by a cross bar 2D, and is connected to the other of the two cores 3A. Each of the lead wires 2B of the three inserted secondary coils 2A is connected by a crossover bar 2E, and the upper ends of one of the two crossover bars 2D and one of the two crossover bars 2E are connected by a crossover bar 2F. Then, the three secondary coils 2A constituting the secondary coil assembly 2 are connected in parallel. And the secondary coil assembly 2 is also connected in parallel by connecting the lower end of the other of the cross bar 2D and the other end of the cross bar 2E with the cross bar 2G.

  The high frequency transformer 30 is the same as the high frequency transformer 10 of the first embodiment except for the above points. Therefore, the primary coil 1A, the secondary coil 2A, the inner iron type ferrite core 3, and the insulating member 7 are as described in the first embodiment.

  In addition to the features of the high-frequency transformer 10 of the first embodiment, the high-frequency transformer 30 includes four primary coils 1A constituting the primary coil assembly 1 and three secondary coils constituting the secondary coil assembly 2. Since all of the coils 2A are connected in parallel, and the primary coil assemblies 1 and secondary coils are also connected in parallel, a high-frequency current of low voltage and large current is input to the primary coil assembly 1. The secondary coil assembly 2 has a feature that it is particularly preferable for use in outputting a high-frequency current of a low voltage and a large current.

4). Embodiment 4
Another example of the high frequency transformer having the inner iron core will be described below.
In the high-frequency transformer 40 according to the fourth embodiment, as shown in FIGS. 16 to 18, the eight primary coils 1 </ b> A constituting the two primary coil assemblies 1 are all connected in parallel, and the two secondary coils are connected. All the six secondary coils 2A constituting the coil assembly 2 are connected in series.

  As shown in FIG. 16 and FIG. 17, the starting end and the terminating end of the primary coil 1A are drawn out to the outside of the primary coil 1A to become a lead wire 1B, and similarly the starting end and the terminating end of the secondary coil 2A Each part is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  Each of the lead wires 1B of the four primary coils 1A inserted in each of the cores 3A in the inner iron type ferrite core 3 is connected by a cross bar 1D, and four of the lead wires 1B inserted in the other of the two cores 3A. Each of the lead wires 1B of the primary coil 1A is connected by a crossing bar 1E, one end of the crossing bar 1D and one end of the crossing bar 1E are connected by a crossing bar 1F, and the other side of the crossing bar 1D is connected to the other side of the crossing bar 1E. The lower end of the other is connected by a cross bar 1G.

  On the other hand, the three secondary coils 2A inserted into each core 3A in the inner iron type ferrite core 3 and the three secondary coils 2A inserted into the other of the two cores 3A are the lead wires 2B. Are connected in series.

  The high frequency transformer 40 is the same as the high frequency transformer 10 of the first embodiment except for the above points. Therefore, the primary coil 1A, the secondary coil 2A, the inner iron type ferrite core 3, and the insulating member 7 are as described in the first embodiment.

  In addition to the features of the high-frequency transformer 10 of the first embodiment, the high-frequency transformer 40 includes all eight primary coils 1A constituting the two primary coil assemblies 1 connected in parallel, and two secondary coil assemblies. Since the six secondary coils 2A constituting the body 2 are all connected in series, a high voltage current of low voltage and large current is input to the primary coil assembly 1 and a high voltage high frequency current is output from the secondary coil. It has the feature that it is particularly preferable for the application to be made.

5. Embodiment 5
Another example of the high frequency transformer having the inner iron core will be described below.
In the high frequency transformer 50 of the fifth embodiment, as shown in FIGS. 19 to 21, four primary coils 1A of the primary coil inserted into one of the cores 3A and 1 inserted into the other of the cores 3A. The four primary coils 1A of the secondary coils are connected in parallel, and the two primary coil assemblies 1 are connected in series.

  Similarly, the three secondary coils 2A of the secondary coil inserted into one of the cores 3A and the three secondary coils 2A of the secondary coils inserted into the other of the cores 3A are connected in parallel. Two secondary coil assemblies 2 are connected in series.

  As shown in FIG. 19 and FIG. 20, the starting end and the terminating end of the primary coil 1A are respectively drawn out to the outside of the primary coil 1A to become a lead wire 1B, and similarly the starting end and the terminating end of the secondary coil 2A Each part is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  As shown in FIGS. 19 and 20, each of the lead wires 1B of the four primary coils 1A inserted into one of the two cores 3A in the inner iron type ferrite core 3 is connected by a crossover bar 1D. Each of the lead wires 1B of the four primary coils 1A inserted into the other of the three cores 3A is connected by a crossover bar 1E. Thereby, the three primary coils 1A in each primary coil assembly 1 are connected in parallel. The primary coil assemblies 1 are connected in series by connecting one lower end of the two crossing rods 1D and one lower end of the two crossing rods 1E with the crossing bar 1H.

  Similarly, each of the lead wires 2B of the three secondary coils 2A inserted into one of the two cores 3A in the inner iron type ferrite core 3 is connected by a cross bar 2D, and is connected to the other of the two cores 3A. Each of the lead wires 2B of the three inserted secondary coils 2A is connected by a crossover bar 2E. Thereby, the three secondary coils 2A in each secondary coil assembly 2 are also connected in parallel. Then, the upper ends of one of the two crossing bars 2D and the one upper end of the two crossing bars 2E are connected by the crossing bar 2H, so that the secondary coil assemblies 2 are connected in series.

  The high frequency transformer 50 is the same as the high frequency transformer 10 of the first embodiment except for the above points. Therefore, the primary coil 1A, the secondary coil 2A, the inner iron type ferrite core 3, and the insulating member 7 are as described in the first embodiment.

  In addition to the features of the high-frequency transformer 10 of the first embodiment, the high-frequency transformer 50 includes two primary coil assemblies 1 constituted by four primary coils 1A connected in parallel. Since the two secondary coil assemblies 2 constituted by the three secondary coils 2A connected in parallel are connected in series, a high-frequency high-current high-frequency current is input to the primary coil assembly 1 It has a feature that it is particularly preferable for an application of outputting a high-frequency, high-current high-frequency current from the secondary coil.

6). Embodiment 6
Another example of the high frequency transformer having the inner iron core will be described below.
In the high-frequency transformer 60 of the sixth embodiment, as shown in FIGS. 22 to 24, four primary coils 1A of the primary coil inserted into one of the cores 3A and 1 inserted into the other of the cores 3A. The four primary coils 1A of the secondary coils are connected in series, and the two primary coil assemblies 1 are connected in parallel.

  Similarly, the three secondary coils 2A of the secondary coil inserted into one of the cores 3A and the three secondary coils 2A of the secondary coils inserted into the other of the cores 3A are connected in series, respectively. Two secondary coil assemblies 2 are connected in series.

  As shown in FIG. 22 and FIG. 23, the starting end and the terminating end of the primary coil 1A are respectively drawn out to the outside of the primary coil 1A to become a lead wire 1B, and similarly the starting end and the terminating end of the secondary coil 2A Each part is drawn out to the outside of the secondary coil 2A to be a lead wire 2B.

  And the four primary coils 1A which comprise each primary coil assembly 1 are connected in series by the lead wire 1B. The details of the connection method of connecting four primary coils 1A in series are as described in the first embodiment. Then, the lead wires 1B at the start end of the primary coil 1A in the uppermost stage in one primary coil assembly 1 and the other primary coil assembly 1 are connected to each other, and the terminal end of the lowermost primary coil 1A Leaders 1B are connected to each other. Thereby, the primary coil assemblies 1 are connected in parallel.

  Similarly, three secondary coils 2A constituting each secondary coil assembly 2 are connected in series by a lead wire 2B. The details of the connection method for connecting three secondary coils 2A in series are as described in the first embodiment. The lead wires 2B at the start end of the uppermost secondary coil 2A in one secondary coil assembly 2 and the other secondary coil assembly 2 are connected to each other, and the end portion of the lowermost secondary coil 2A is connected. Leader lines 2B are connected to each other. Thereby, the secondary coil assemblies 2 are connected in parallel.

  The high-frequency transformer 60 is the same as the high-frequency transformer 10 of the first embodiment except for the above points. Therefore, the primary coil 1A, the secondary coil 2A, the inner iron type ferrite core 3, and the insulating member 7 are as described in the first embodiment.

  In addition to the features of the high-frequency transformer 10 of the first embodiment, the high-frequency transformer 60 includes two primary coil assemblies 1 constituted by the primary coils 1A connected in series, and is connected in series in the same manner. Since the two secondary coil assemblies 2 constituted by the secondary coils 2A are connected in parallel, a high-frequency high-current current is input to the primary coil assembly 1 to increase the high voltage from the secondary coil. It has a feature that it is particularly preferable for use in outputting a high-frequency current.

7). Embodiment 7
Next, an example of the high frequency transformer of the present invention having an outer iron type core will be described below.
As shown in FIGS. 25 and 26, the high-frequency transformer 70 of the seventh embodiment includes an outer iron type ferrite core 4 having one cylindrical central core 4A, and a primary coil set inserted into the central core 4A. A body 1 and a secondary coil assembly 2.

  The outer iron type ferrite core 4 is formed by combining two E-shaped central cores 4B formed by sintering ferrite into an E-shape so as to face each other, and fastening fasteners (not shown) from above and below. It is used by pressing and matching. Therefore, as shown in FIG. 25, the outer iron type ferrite core 4 is divided into a central core 4A and an outer central core 4C positioned so as to surround the central core 4A from the outside. Instead of forming the outer iron ferrite core 4 by combining the E-shaped central cores 4B of the same form so as to face each other, the E-shaped corresponding to the central core 4A, the outer central core 4C, and the lower core. The outer iron type ferrite core 4 may be formed by combining a core and an I-shaped core corresponding to the upper core.

  The central core 4A and the outer central core 4C may both be formed in a prismatic shape, but as shown in FIG. 25, if the central core 4A is formed in a columnar shape, the outer iron type ferrite core 4 and the primary core 4A are primary. The useless gap between the coil assembly 1 and the secondary coil assembly 2 is eliminated, and the space factor occupied by the total area of the cross-sectional areas of the primary coil and the secondary coil with respect to the area of the winding window approaches 100%. Therefore, this contributes to further miniaturization of the high-frequency transformer 70.

  The primary coil assembly 1 is composed of four primary coils 1A, and the secondary coil assembly 2 is composed of three secondary coils 2A.

  The primary coil 1A and the secondary coil 2A are alternately inserted into the central core 4A.

  A starting end portion and a terminal end portion of a flat wire constituting the primary coil 1A are drawn out to be a lead wire 1B. Similarly, the rectangular wire constituting the secondary coil 2A also has a leading end portion and a terminating end portion that are drawn outward to form a lead wire 2B.

  The primary coil 1A is connected in series by a lead wire 1B. Similarly, the secondary coil 2A is also connected in series by the lead wire 2B.

  Each of the primary coil 1A and the secondary coil 2A has a configuration as described in the first embodiment.

  In the high frequency transformer 70 according to the seventh embodiment, since the outer iron type ferrite core 4 is used as the core, the ratio of the core to the coil as compared with the high frequency transformer of the first embodiment in which the ferrite core is the inner iron side core. Becomes larger and the properties as an iron machine become stronger. Therefore, in addition to the features of the high-frequency transformer of the first embodiment, it has a feature that it is suitable for applications in which the number of turns of the primary coil and the secondary coil is small, particularly for high-frequency inverters (about 50 kHz to 1 MHz).

8). Embodiment 8
Another example of the high frequency transformer having the inner iron core will be described below.

  As shown in FIGS. 28 to 30, in the high-frequency transformer 80 according to the eighth embodiment, the four primary coils 1A constituting the primary coil assembly 1 are connected to the connecting rod 1D on one and the other lead wires 1B. Are connected in parallel.

  Similarly, the three secondary coils 2A constituting the secondary coil assembly 2 are connected in parallel by a crossover bar 2D in one and the other lead wire 2B.

  The high frequency transformer 80 has the same configuration as that of the high frequency transformer of the seventh embodiment except for the above points.

  In the high-frequency transformer 80, all of the four primary coils 1A constituting the primary coil assembly 1 and the three secondary coils 2A constituting the secondary coil assembly 2 are connected in parallel. In addition to the features of the high-frequency transformer of the seventh embodiment, it is particularly preferable for applications in which high-frequency current of low voltage and high current is input to the primary coil assembly 1 and further high-frequency current of low voltage and high current is output from the secondary coil. Has features.

9. Embodiment 9
Another example of the high frequency transformer having the inner iron core will be described below.

  As shown in FIGS. 31 to 33, in the high-frequency transformer 90 according to the ninth embodiment, the four primary coils 1A constituting the primary coil assembly 1 are connected in series by a lead wire 1B.

  On the other hand, the three secondary coils 2A constituting the secondary coil assembly 2 are connected in parallel by a crossover bar 2D at one and the other lead wire 2B.

  In the high-frequency transformer 90, instead of connecting the primary coil 1A in series and connecting the secondary coil 2A in parallel, the primary coil 1A may be connected in parallel and the secondary coil 2A connected in series.

  The high frequency transformer 90 has the same configuration as that of the high frequency transformer of the seventh embodiment except for the above points.

  In the high frequency transformer 90, the four primary coils 1A constituting the primary coil assembly 1 are connected in series, and the three secondary coils 2A constituting the secondary coil assembly 2 are connected in parallel. In addition to the features of the high-frequency transformer of the seventh embodiment, the high-frequency high-frequency current is input to the primary coil assembly 1 and the low-voltage high-current high-frequency current is output from the secondary coil. Have.

10. Embodiment 10
A three-phase high-frequency transformer included in the high-frequency transformer of the present invention will be described below.

  As shown in FIGS. 34 to 37, the three-phase high-frequency transformer 100 according to the tenth embodiment includes a three-phase tripod ferrite core 5 and primary coil assemblies 11, 12, 13 and secondary coil assemblies 21, 22. , 23 are inserted. Two insulating members 7 are inserted into the primary coil assemblies 11, 12, 13 and the secondary coil assemblies 21, 22, 23 at two positions symmetrical with respect to the axis of the columnar core 5 </ b> A described later. ing. The insulating member 7 is as described in the first embodiment.

  The tripod ferrite core 5 is included in the ferrite core in the high-frequency transformer of the present invention, and has a columnar core 5A formed of three ferrites arranged on the circumference at intervals of 120 degrees as shown in FIGS. A plate-like top plate 5B formed of ferrite connecting the upper ends of the three columnar cores 5A and a bottom plate 5C formed of ferrite connecting the lower ends of the three columnar cores 5A are provided.

  The top plate 5B and the bottom plate 5C have equilateral triangular planar shapes in which the vertices are rounded and the sides swell outward in an arc shape. And the bolt insertion hole is provided in the center part, and the bolt insertion groove is provided in the center part of each side. A fixing bolt 8 is inserted into the bolt insertion hole and the bolt insertion groove, and the top plate 5B, the columnar core 5A, and the bottom plate 5C are fixed.

  In the tripod ferrite core 5, the columnar core 5 </ b> A can be vertically divided into two along a plane orthogonal to the axis thereof, and the upper half can be integrated with the top plate 5 </ b> B and the lower half can be integrated with the bottom plate 5 </ b> C. . Further, instead of dividing the columnar core 5A into two vertically, one of the top plate 5B and the bottom plate 5C and the columnar core 5A are integrally formed, and the other of the top plate 5B and the bottom plate 5C is formed so as to be separable from the columnar core 5A. May be.

  One of the three columnar cores 5A has a primary coil assembly 11 and a secondary coil assembly 21, and the other one has a primary coil assembly 12 and a secondary coil assembly 22. In addition, a primary coil assembly 13 and a secondary coil assembly 23 are inserted into another one.

  As shown in FIGS. 34 to 38, the primary coil assemblies 11, 12, and 13 are each formed by connecting four primary coils 1A in series by lead wires 1B. The details of the serial connection of the primary coil 1A are as described in the first embodiment. Similarly, the secondary coil assemblies 21, 22, and 23 are each formed by connecting three secondary coils 2A in series by a lead wire 2B. The details of the serial connection of the secondary coil 2A are also as described in the first embodiment.

  In the primary coil assemblies 11, 12, and 13, as shown in FIGS. 34 to 37, the lead wire on the start end side of the primary coil 1A at the first stage from the top of the primary coil assemblies 11, 12, and 13 is used. 1B is bent upward and is connected to a connection ring 6 which is an annular plate-like conductor. The lead wire 1B on the terminal side of the primary coil 1A in the fourth stage from the top of the primary coil assemblies 11, 12, 13 is connected to the r-phase, s-phase, and t-phase on the input side, respectively. Thereby, as shown in FIG. 38, the primary coil assemblies 11, 12, and 13 are Y-connected.

  On the other hand, in the secondary coil assemblies 21, 22, and 23, as shown in FIGS. 34 to 37, the lead wire 1B on the terminal side of the secondary coil 2A at the third stage from the top in the secondary coil assembly 21 is provided. Connected to the second starting end side lead wire 2B of the first stage from the top in the secondary coil assembly 22, and the leading end lead wire of the secondary coil 2A of the third stage from the top in the secondary coil assembly 22 2B is connected to the lead wire 2B on the second starting end side of the second stage from the top in the secondary coil assembly 23, and is connected to the terminal side of the secondary coil 2A on the third stage from the top in the secondary coil assembly 23. The lead wire 2 </ b> B is connected to the lead wire 2 </ b> B on the second starting end side of the first stage from the top in the secondary coil assembly 21. The R phase on the output side is connected to the connection portion between the secondary coil assembly 21 and the secondary coil assembly 22, and the output is output to the connection portion between the secondary coil assembly 22 and the secondary coil assembly 23. The S phase on the side is connected, and the T phase on the output side is connected to the connection portion between the secondary coil assembly 23 and the secondary coil assembly 21. Accordingly, the secondary coil assemblies 21, 22, and 23 are Δ-connected as shown in FIG.

  Thus, in the three-phase high-frequency transformer 100, the primary coil assemblies 11, 12, and 13 are Y-connected and the secondary coil assemblies 21, 22, and 23 are Δ-connected. 11, 12, 13 may be Δ-connected, and the secondary coil assemblies 21, 22, 23 may be Y-connected, and the primary coil assemblies 11, 12, 13 and the secondary coil assemblies 21, 22, 23 may be Any of them may be Δ-connected or Y-connected.

  In the high-frequency transformer 100 of the tenth embodiment, the primary coil 1A is connected in series in the primary coil assemblies 11, 12, and 13 and the secondary coil 2A is also connected in series in the secondary coil assemblies 21, 22, and 23. In this case, since the turns ratio of the primary coil assemblies 11, 12, 13 and the secondary coil assemblies 21, 22, 23 is 1: 1, the primary coil assemblies 11, 12, 13, 2 Any of the secondary coil assemblies 21, 22 and 23 is Y-connected so that it can be suitably used for applications in which high-voltage electrical energy is transferred between two circuits insulated from each other.

  In addition, the primary coil 1A is connected in series in the primary coil assemblies 11, 12, 13 and the secondary coil 2A is connected in parallel in the secondary coil assemblies 21, 22, 23, and the primary coil assembly 11, 12 and 13 are Y-connected, and the secondary coil assemblies 21, 22, and 23 are Δ-connected, so that they are suitable for use in applications where a large current alternating current is output to the secondary coil assemblies 21, 22, and 23. Is done.

  The primary coils 1A are connected in parallel in the primary coil assemblies 11, 12, 13 and the secondary coils 2A are connected in series in the secondary coil assemblies 21, 22, 23, and the primary coil assemblies 11, 12, 13 is a Δ connection and the secondary coil assemblies 21, 22, and 23 are a Y connection, so that the secondary coil assemblies 21, 22, and 23 are preferably used for the purpose of outputting a large current alternating current. .

  When all the primary coils 1A are connected in parallel in the primary coil assemblies 11, 12, and 13 and all the secondary coils 2A are connected in parallel in the secondary coil assemblies 21, 22, and 23, Since the turns ratio of the secondary coil assemblies 11, 12, 13 and the secondary coil assemblies 21, 22, 23 is 1: 1, the primary coil assemblies 11, 12, 13 and the secondary coil assembly 21 , 22 and 23 are suitably used for applications in which large current pressure electrical energy is transferred between two circuits that are insulated from each other by Δ connection.

  As described above, the primary coil 1A of the primary coil assembly 1 is inserted between the secondary coils 2A of the secondary coil assembly 2, and the primary coils 1A located at both ends of the primary coil are secondary coils. Although the example of the high frequency transformer arranged so as to be located outside the assembly 2 has been described, conversely in the first to tenth embodiments, the secondary coil 2A of the secondary coil assembly 2 is replaced with the primary coil assembly 1. A high-frequency transformer that is inserted between the primary coils 1A and arranged such that the secondary coils 2A located at both ends of the secondary coil are located outside the primary coil assembly 1 is also an embodiment of the present invention. Is included. Such a high-frequency transformer is suitable for an application in which alternating current of low voltage and large current is input to the primary coil and high voltage alternating current is output from the secondary coil.

1 Primary coil assembly 1A Primary coil 1B Leader 1C Crossover bar 1D Crossover bar 1E Crossover bar 1F Crossover bar 1G Crossover bar 2 Secondary coil aggregate 2A Secondary coil 2B Lead wire 2D Crossover bar 2E Crossover bar 2F Crossover bar 2G Crossover Bar 2H Crossover Bar 3 Inner Iron Type Ferrite Core 3A Core 4 Outer Iron Type Ferrite Core 4A Central Core 4B E-shaped Core 4C Outer Core 5 Tripod Ferrite Core 5A Columnar Core 5B Top Plate 5C Bottom Plate 6 Connection Ring 7 Insulating Member 7A Insulating piece 8 Fixing bolt 10 High frequency transformer 11 Primary coil assembly 12 Primary coil assembly 13 Primary coil assembly 20 High frequency transformer 21 Secondary coil assembly 22 Secondary coil assembly 23 Secondary coil assembly 30 High frequency transformer 40 High-frequency transformer 50 High-frequency transformer 60 High-frequency transformer 70 High frequency Wave transformer 80 High-frequency transformer 90 High-frequency transformer 100 Three-phase high-frequency transformer

The invention described in claim 1 includes a plurality of primary coils formed by edgewise winding a rectangular wire, and a plurality of secondary coils formed by edgewise winding a rectangular wire. The primary coil is disposed at an interval so that a winding end portion of one primary coil and a winding start portion of another primary coil adjacent to the one primary coil face each other. , One secondary coil at each of the intervals, the winding start portion of the secondary coil is opposed to the winding end portion of the one primary coil, and the winding end portion of the secondary coil is the other primary coil. The primary coils are arranged in series so as to face the winding start portion of the coil, the primary coils are connected in series across the outside of the secondary coil to form a primary coil assembly, and the secondary coils are Connected in series across the outside of the primary coil It relates to a high frequency transformer which constitutes the secondary coil assembly.

According to a second aspect of the present invention, there are provided a plurality of primary coils formed by edgewise winding a rectangular wire and a plurality of secondary coils formed by edgewise winding a rectangular wire. The primary coil is disposed at an interval so that a winding end portion of one primary coil and a winding start portion of another primary coil adjacent to the one primary coil face each other. , One secondary coil at each of the intervals, the winding start portion of the secondary coil is opposed to the winding end portion of the one primary coil, and the winding end portion of the secondary coil is the other primary coil. The primary coils are arranged in series so as to face the winding start portion of the coil, the primary coils are connected in series across the outside of the secondary coil to form a primary coil assembly, and the secondary coils are Connected in parallel across the outside of the primary coil It relates to a high frequency transformer which constitutes the secondary coil assembly.

According to a third aspect of the present invention, there are provided a plurality of primary coils formed by edgewise winding a rectangular wire and a plurality of secondary coils formed by edgewise winding a rectangular wire. The primary coil is disposed at an interval so that a winding end portion of one primary coil and a winding start portion of another primary coil adjacent to the one primary coil face each other. , One secondary coil at each of the intervals, the winding start portion of the secondary coil is opposed to the winding end portion of the one primary coil, and the winding end portion of the secondary coil is the other primary coil. The primary coils are arranged so as to face the winding start portion of the coil, and the primary coils are connected in parallel across the outer side of the secondary coil to form a primary coil assembly, and the secondary coils are Connected in series across the outside of the primary coil It relates to a high frequency transformer which constitutes the secondary coil assembly.

According to a fourth aspect of the present invention, a plurality of primary coils formed by edgewise winding a rectangular wire, and a plurality of secondary coils formed by edgewise winding a rectangular wire. The primary coil is disposed at an interval so that a winding end portion of one primary coil and a winding start portion of another primary coil adjacent to the one primary coil face each other. , One secondary coil at each of the intervals, the winding start portion of the secondary coil is opposed to the winding end portion of the one primary coil, and the winding end portion of the secondary coil is the other primary coil. The primary coils are arranged so as to face the winding start portion of the coil, and the primary coils are connected in parallel across the outer side of the secondary coil to form a primary coil assembly, and the secondary coils are Connected in parallel across the outside of the primary coil It relates to a high frequency transformer which constitutes the secondary coil assembly.

The invention according to claim 5 is the high-frequency transformer according to any one of claims 1 to 4 , wherein the number of primary coils is three or more and the number of secondary coils is four or more. About.

The invention according to claim 6, between said primary coil and the secondary coil is about high-frequency transformer according to any one of claim 1 to 5 which is inserted an insulating member.

The invention according to claim 7 relates to the high-frequency transformer according to claim 6 , wherein the insulating member is an insulating piece, and the insulating piece is held at a predetermined interval in the thickness direction by an insulating piece holding member.

The invention of claim 8, any one of the primary flat wire and the secondary coil is a flat wire forming the width and thickness of at least one of different claims 1-7 which coil constituting the The high frequency transformer described in 1.

The invention according to claim 9 is the high-frequency transformer according to any one of claims 1 to 8 , wherein a ferrite core is inserted through the primary coil assembly and the secondary coil assembly .

The invention according to claim 10 relates to the high-frequency transformer according to claim 9 , wherein the ferrite core is an outer iron core.

The invention according to claim 11 relates to the high-frequency transformer according to claim 9 , wherein the ferrite core is an inner iron core.

The invention according to claim 12 is provided with three columnar coils each including the primary coil assembly and the secondary coil assembly, and formed of ferrite and arranged at equal intervals on the circumference. A core, a top plate formed of ferrite connecting one end of the columnar core, and a bottom plate formed of ferrite connecting the other end of the columnar core, each of the three columnar cores being 1 is inserted into the next coil assemblies and the secondary coil assembly, according to any one of claims 1-8 wherein the primary coil assembly and a secondary coil assembly which are respectively Y connection or Δ connection Related to high frequency transformer.

In the high-frequency transformer according to any one of claims 1 to 4 , each of the primary coil and the secondary coil is formed by edgewise winding a rectangular wire a plurality of times. The primary coils and the secondary coils are alternately arranged, and the primary coils are disposed at both ends. Accordingly, when a high-frequency current is passed through the primary coil, a uniform magnetic field formed by the primary coil passes through the secondary coil, so that the leakage inductance can be minimized. As a result, the degree of coupling between the primary coil and the secondary coil is as close to 1 as possible, so the energy transfer rate from the primary coil to the secondary coil is almost 100%, and energy is transferred from the primary coil to the secondary coil. The loss at the time of transition can be minimized.

The high-frequency transformer according to claim 5 is characterized in that the primary coil portion is two or three, and the conversion efficiency is excellent as compared with the high-frequency transformer having one or two secondary coils.

In the high-frequency transformer according to claim 6 , since the insulating member is inserted between the primary coil and the secondary coil, the high-frequency transformer in which the insulating member is not inserted between the primary coil and the secondary coil. Compared with the transformer, the insulation distance between the primary coil and the secondary coil is kept constant, and the insulation between the primary coil and the secondary coil becomes more reliable.

In the high-frequency transformer according to claim 7 , since the insulating member is an insulating piece and is held at a predetermined interval in the thickness direction by the insulating piece holding member, the insulation not held by the insulating piece holding member Compared with the case where a piece is used, the operation of inserting the insulating piece between the primary coil and the secondary coil is facilitated.

In the high-frequency transformer according to claim 8 , since the rectangular wire constituting the primary coil and the rectangular wire constituting the secondary coil are different in at least one of width and thickness, for example, the secondary coil Is larger than the current of the primary coil, at least one of the width and thickness of the rectangular wire of the secondary coil is made larger than the rectangular wire of the primary coil, and conversely Is larger than the current of the secondary coil, at least one of the width and thickness of the rectangular wire of the primary coil is made larger than the rectangular wire of the secondary coil. The width and thickness of the rectangular wire can be set according to the current flowing through the secondary coil. Thus, it can be set as the high frequency transformer adapted to various different input-output conditions.

In the high frequency transformer according to the ninth aspect, since the ferrite core is used as the core, the loss when the core is used at a high frequency is smaller than that of the transformer in which the silicon steel sheet for transformer is laminated.

In the high frequency transformer according to claim 10, since the ferrite core is an outer iron type core, the ratio of the core to the coil is larger than that of the high frequency transformer in which the ferrite core is an inner iron type core, and the property as an iron machine is increased. Becomes stronger. Therefore, it is suitable for an application in which the number of turns of the primary coil and the secondary coil is small, particularly for a high-frequency inverter (about 50 kHz to 1 MHz).

In the high frequency transformer according to claim 11 , since the ferrite core is an inner iron type core, the ratio of the core to the coil is smaller than that of the high frequency transformer in which the ferrite core is an outer iron type core, and the properties as a copper machine. Becomes stronger. Therefore, it is possible to increase the number of turns of the primary coil and the secondary coil. In particular, when frequency control is performed like a parallel resonance type inverter or a series resonance type inverter, there is a margin in the density of magnetic flux passing through the core. It is suitable for widening the control range up to a low frequency (about 10 kHz to 200 kHz).

Since the high-frequency transformer of claim 12 is a three-phase high-frequency transformer, if the leg core into which the primary coil, the secondary coil, and the winding are inserted is the same, it has a capacity three times that of the single-phase high-frequency transformer. is doing. Therefore, it is suitable as a large-capacity power conversion device and a large-capacity power supply device. In the output of the secondary side rectifier circuit, the basic pulse rate is 48% for single-phase high-frequency transformers in the full-wave rectifier circuit, but 4.2% for single-phase high-frequency transformers in the three-phase high-frequency transformer. 1/10 or less. Therefore, the filter used for reducing the output ripple may be a small capacity filter.

Claims (13)

A plurality of primary coils in which a rectangular wire is wound edgewise a plurality of times;
A plurality of secondary coils obtained by edgewise winding a flat wire, and
With
The plurality of primary coils and the plurality of secondary coils are each connected in series or in parallel,
The primary coil and the secondary coil are alternately arranged so that the secondary coil is inserted concentrically with the primary coil between the primary coils, and both ends thereof are the primary coil. A high-frequency transformer.   The high-frequency transformer according to claim 1, wherein the number of primary coils is four or more, and the number of secondary coils is three or more.   The high-frequency transformer according to claim 1 or 2, wherein the number of winding turns of the rectangular wire of the primary coil is larger than the number of winding turns of the secondary coil. A plurality of primary coils in which a rectangular wire is wound edgewise a plurality of times;
A plurality of secondary coils obtained by edgewise winding a flat wire, and
With
The plurality of primary coils and the plurality of secondary coils are connected in series or in parallel,
The primary coil and the secondary coil are alternately arranged so that the primary coil is inserted concentrically with the secondary coil between the secondary coils, and both ends thereof are the secondary coil. A high-frequency transformer.   5. The high-frequency transformer according to claim 4, wherein the number of primary coils is three or more, and the number of secondary coils is four or more.   The high-frequency transformer according to claim 4 or 5, wherein the number of winding turns of the rectangular wire of the secondary coil is larger than the number of winding turns of the primary coil.   The high frequency transformer according to claim 1, wherein an insulating member is inserted between the primary coil and the secondary coil.   The high-frequency transformer according to claim 7, wherein the insulating member is an insulating piece, and the insulating piece is held at a predetermined interval in the thickness direction by an insulating piece holding member.   The high-frequency transformer according to any one of claims 1 to 8, wherein at least one of a width and a thickness of the rectangular wire constituting the primary coil and the rectangular wire constituting the secondary coil are different from each other.   The high-frequency transformer according to any one of claims 1 to 9, wherein both the primary coil and the secondary coil are inserted through the same ferrite core.   The high-frequency transformer according to claim 10, wherein the ferrite core is an outer iron type core.   The high-frequency transformer according to claim 10, wherein the ferrite core is an inner iron type core. The ferrite core is
Three columnar cores formed of ferrite and arranged at equal intervals on the circumference;
A top plate formed of ferrite connecting one end of the columnar core;
A bottom plate formed of ferrite connecting the other end of the columnar core;
With
A plurality of primary coils and a plurality of secondary coils are inserted into each of the columnar cores to form a primary coil assembly and a secondary coil assembly,
The high-frequency transformer according to claim 10, wherein the primary coil assembly and the secondary coil assembly are respectively Y-connected or Δ-connected.

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