JPH04328811A - Transformer device - Google Patents

Abstract

PURPOSE:To miniaturize the title transformer. CONSTITUTION:A wire 1 for the primary coil and another wire 2 for the secondary coil mutually being kept in the insulated state are twisted so as to form a transformer body 3 wherein the input terminals P1, P2 and the output terminals S1, S2 are provided respectively on both ends of the wire 1 for the primary coil and on both ends of the wire 2 for the secondary coil. Through these procedures, the twisting function of the wire 1 and the wire 2 is fulfilled so that the title transformer device notably miniaturized developing the high conversion efficiency may be manufactured.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a transformer device,
In particular, it relates to a new type of transformer device that enables miniaturization.

0002

[Background technology] A transformer is generally used to transform alternating current voltage from high voltage to low voltage or from low voltage to high voltage.
Alternatively, it has been widely used in various fields as an electrical device used when attempting to insulate primary and secondary sources using direct current. Various improvements have been made to such transformers as magnetic materials and insulating materials have progressed. and,
Many of the improvements to this type of transformer in the prior art have focused primarily on so-called characteristic improvements to reduce losses.

On the other hand, in recent years, along with the miniaturization of electronic equipment such as computers, demands have been made from various quarters for transformers to be extremely miniaturized. In particular, despite advances in integrated circuit technology that have made the electronic circuit parts that handle electrical signals extremely miniaturized, the power supply parts that supply power to the electronic circuits are still transformers, choke coils, etc. Its miniaturization is delayed. For example, in a digital computer that handles large-scale signals, about half of the total volume is the power supply section.

[0004] As a method for downsizing the power supply section,
Conventionally, increasing the operating frequency has been cited. As the operating frequency becomes higher, a flat transformer using, for example, a laminated micro magnetic core has recently been proposed, and its practical use is progressing. At the same time, on the other hand, research and development of transformers using amorphous magnetic materials with excellent high frequency characteristics is also progressing in various fields.

[0005]

[Problem to be Solved by the Invention] However, in the above conventional example, the idea of increasing the operating frequency theoretically leads to the miniaturization of the transformer, but in order to realize this, it is difficult to change the main magnetic path of the magnetic flux. The upper limit of the operating frequency is limited by the high-frequency characteristics of the magnetic material that is used, which causes the disadvantage of increased loss. Even if, for example, ferrite, which is a magnetic material with relatively good high frequency characteristics, is used to improve this problem, in operation above the MHZ band,
There are disadvantages in that the magnetic permeability decreases, resulting in a significant drop in conversion efficiency, and furthermore, the eddy current and hysteresis loss of the material increase, which negates the advantage of using a magnetic material.

[0006]

OBJECTS OF THE INVENTION An object of the present invention is to improve the disadvantages of the conventional example, and particularly to provide a new type of transformer device that has relatively good voltage conversion efficiency and can be miniaturized. .

[0007]

[Means for Solving the Problems] In the present invention, a transformer body is formed by twisting a primary coil wire material and a secondary coil wire material into a rope shape while maintaining mutual insulation, and Input terminals are provided at both ends of the wire for the primary coil, and output terminals are provided at both ends of the wire for the secondary coil. This aims to achieve the above-mentioned purpose.

[0008]

[Operation] When an AC power source of a predetermined frequency is applied to the input terminals P1 and P2', a current i1 flows through the primary coil wire 1 in the transformer body 3 as shown in FIGS. An alternating magnetic field H of magnetic flux Φ is formed. On the other hand, in the secondary coil wire 2 disposed along the primary coil wire 1, a secondary induced voltage e2 corresponding to the magnitude of the magnetic flux Φ is generated according to Faraday's law. In this case, since the primary coil wire 1 and the secondary coil wire 2 are twisted together in a rope shape, the engagement by magnetic flux between the primary coil wire 1 and the secondary coil wire 2 is enhanced.
Therefore, the secondary induced voltage e2 has a relatively high level value. Output terminal S1 of secondary coil wire 2
When an appropriate load is connected to
flows to In experiments, the transformation ratio constant KO when the turns ratio is "1:1" in an ideal transformer with no loss is set to 100 [
%], we were able to obtain KO = around 80 [%] in the high frequency region, a result that seems to have sufficient potential for practical application.

[0009]

[First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In FIGS. 1 and 2, reference numeral 1 indicates a wire for the primary coil, and reference numeral 2 indicates a wire for the secondary coil. The primary coil wire 1 and the secondary coil wire 2 have the same length and are twisted into a rope shape as shown in FIG. That is, in this embodiment, the primary coil wire 1 and the secondary coil wire 2 of the same length are twisted together (twisted) into a rope shape while maintaining mutual insulation, thereby forming a transformer. A main body 3 is formed. Input terminals P1 and P2 are connected to both ends of the primary coil wire 1 in the transformer body 3.
is provided. Furthermore, output terminals S1 and S2 are provided at both ends of the secondary coil wire 2.

Input terminals P1, P2 and output terminal S1
, S2 are connected to one end of the transformer body 3 (the left end in FIG. 1) as an input terminal P1 and an output terminal S1 as forward terminals.
are arranged, and an input terminal P1 and an output terminal S1 are provided as return terminals at the other end of the transformer body 3 (the right end in FIG. 1).
is installed. The return terminal P2 on the primary side is disposed as P2' at one end (the left end in FIG. 1) of the transformer main body 3 via the relay cable 4. Further, the outgoing terminal S1 on the secondary side is connected to the other end of the transformer body 3 (the right end in FIG. 1) via the relay cable 5.
’. As a result, input terminals P1 and P are connected to one end of the transformer body 3 (the left end in FIG. 1).
2', and output terminals S1' and S2 are set at the other end (the right end in FIG. 1) of the transformer body 3, respectively.

Next, the operation of the above embodiment will be explained. When an AC power source of a predetermined frequency is applied to the input terminals P1 and P2' in FIG. 1, a current i1 flows through the primary coil wire 1 in the transformer body 3 as shown in FIGS. An alternating magnetic field H of magnetic flux Φ is formed. On the other hand, in the secondary coil wire 2 disposed along the primary coil wire 1, a secondary induced voltage e2 corresponding to the magnitude of the magnetic flux Φ is generated according to Faraday's law. Therefore, the output terminals S1' and S2 of the secondary coil wire 2
By connecting an appropriate load to the secondary coil wire 2, a current i2 will flow through the secondary coil wire 2 in accordance with the size and nature of the load.

FIG. 4 shows an example of experimental results for practical use of the transformer body 3 shown in FIG. 1. In this experiment, the secondary side (
A pure resistance load of 10 [KΩ] is connected to the output terminals S1, S2), and the primary voltage v1 is connected to the input terminals P1, P2.
is applied, and the frequency f is changed from 1 [K] to 1 [M
] and change the transformation ratio to ``(V2 /V1)×1
00 [%]'' was measured. In this case, measurements were also made at the same time when the secondary was opened and no load was applied, and almost the same results as in FIG. 4 could be obtained. As a result, significant differences in frequency characteristics were obtained between types A, B, and C of the twisted coils shown in FIG. Furthermore, the results showed that types A, B, and C had almost the same frequency characteristics. At the same time, the transformation ratio constant K0 (however, K0 is the transformation ratio constant determined by the diameter of the coil wire and the power supply frequency; the same applies hereinafter) approaches zero in the low frequency region, but in the high frequency region, K0 = 70 to 80 [%] We were able to obtain results that seem to have sufficient potential for practical application.

In the experimental results shown in FIG. 4, when we analyze types A, B, and C in FIG.
It is clear that the transformation ratio K0 rises quickly.

As described above, in the first embodiment shown in FIGS. 1 to 3, when the diameter of the coil is small, the coupling between the primary and secondary is clearly enhanced, and at the same time, by setting the operating frequency high, It has become clear that this method can be fully put into practical use. Also, if the coil diameter is set large,
It was found that it is possible to operate from relatively low frequencies. Furthermore, in this first embodiment, since the entire cable is formed into a rope shape, it is possible to handle it in the same way as a normal power cable when using it, and moreover, the transformer inside the electronic device body can be omitted. Therefore, when this is used, there is an advantage that the main body of the electronic device can be significantly downsized.

[0015]

[Second Embodiment] A second embodiment is shown in FIGS. 6 and 7. The second embodiment shown in FIGS. 6 and 7 shows a case where three primary coil wires 1 of the same length are used. Code 41, 42
, 43 indicates a relay cable. The other configurations are the same as those of the first embodiment described above. Even in this case, in addition to having the same effect as the first embodiment described above, the secondary voltage can be set to "K0.1/3" times the primary voltage. On the other hand, if the number of primary coil wire rods 1 is n, the secondary voltage can be set to "K0.1/n" times the primary voltage.

[0016]

[Third Embodiment] A third embodiment is shown in FIGS. 8 and 9. The third embodiment shown in FIGS. 8 and 9 shows a case in which three secondary coil wires 2 of the same length are used, contrary to the second embodiment described above. Reference numerals 51, 52, and 53 indicate relay cables. The other configurations are the same as those of the first embodiment described above. Even in this case, in addition to having the same effect as the first embodiment described above, the secondary voltage can be changed to 3K of the primary voltage.
0” times. On the other hand, if the number of secondary coil wires 2 is n, the secondary voltage can be set to "nK0" times the primary voltage.

[0017]

[Fourth Embodiment] FIG. 10 shows a fourth embodiment. This figure 10
The fourth embodiment shown in FIG. 1 shows a case where three secondary coil wires 2 of different lengths are used. Code 61, 62, 63
indicates a relay cable. Other configurations are as described above.
It is the same as the example. Even in this case, in addition to having the same effect as the first embodiment described above, the secondary voltage is set to "(total length of secondary coil wire material/total length of primary coil wire material) K0" times the primary voltage. can do. Therefore, by arbitrarily setting the total length of the secondary coil wire, it is possible to set the secondary voltage to an arbitrary value.

[0018]

[Fifth Embodiment] FIG. 11 shows a fifth embodiment. This figure 11
In the fifth embodiment shown in , a plurality of output terminals S01,
S02, S03, S04, and S05 are provided. The other configurations are the same as those of the first embodiment described above. Even in this case, in addition to having the same effect as the first embodiment described above, there is an advantage that a secondary voltage of a predetermined level can be drawn from any location on the transformer body 3 depending on the purpose of use.

[0019]

[Sixth Embodiment] FIG. 12 shows a sixth embodiment. This figure 12
In the sixth embodiment shown in , a plurality of output terminals S01, S02, S03, and S04 having different output voltages are provided at one end of the secondary coil wire 2 in the transformer body 3. Then, each of these output terminals S01, S02,
S03 and S04 are characterized in that one of the terminals is used as a common reference terminal, and the other terminal is drawn out from an arbitrary location on the secondary coil wire 2. code 6
1, 62, 63, and 64 indicate relay cables. The other configurations are the same as those of the first embodiment described above. In addition to having the same effect as the first embodiment described above, this arrangement also has the advantage that different secondary voltages at predetermined levels can be drawn from one end of the transformer body 3 depending on the purpose of use. be.

[0020]

[Seventh Embodiment] FIG. 13 shows a seventh embodiment. This figure 13
In the seventh embodiment shown in , the secondary coil wire 2 in the transformer body 3 is composed of a plurality of wires of different lengths, and each of the plurality of wires is provided with an independent output terminal S01.
, S02, and S03. These output terminals S01, S02, and S03 are all arranged at the other end of the transformer body 3 (the right end in FIG. 13). Reference numerals 61, 62, and 63 indicate relay cables. The other configurations are the same as those of the sixth embodiment described above. Even in this case, the same operation and effect as in the sixth embodiment described above can be obtained.

[0021]

[Eighth Embodiment] FIG. 14 shows an eighth embodiment. This figure 14
In the eighth embodiment shown in FIG. output terminal S1 on the left end of the figure.
', S2. The other configurations are the same as those of the first embodiment described above. The other configurations are the same as those of the first embodiment described above. Even in this case, in addition to having the same effect as the first embodiment described above, in particular, the output terminals S1' and S2
This has the advantage that the output voltage of the device can be effectively set high.

[0022]

[Ninth Embodiment] FIG. 15 shows a ninth embodiment. This figure 15
In the ninth embodiment shown in FIG. output terminal S1 at the right end of the figure.
', S2. Further, the relay cable 4 of the primary coil wire 1 in the first embodiment is formed of the same wire as the primary coil wire 1, and while being wound around the transformer body 3, the input terminal P1 at the left end in the figure , P2'. The other configurations are the same as those of the first embodiment described above. Even in this case, in addition to having the same effect as the first embodiment described above, in particular, the lengths of the primary coil wire 1 and the secondary coil wire 2 in the transformer body 3 are adjusted, and the output terminal S
There is an advantage that the output voltages of 1' and S2 can be set to arbitrary magnitudes.

[0023]

[Tenth Embodiment] FIG. 16 shows a tenth embodiment. In the ninth embodiment shown in FIG. 16, the transformer body 3 in the first embodiment described above is formed into a relatively long rope shape, and
The present invention is characterized in that a heavy transformer body 33 is formed and used by further winding this transformer body 3 into a solenoid shape (coil spring shape). In the figure, Y indicates an instantaneously generated alternating magnetic flux. The other configurations are the same as those of the first embodiment described above. Figure 17 shows the experimental results in this case (
Curve A) is shown. In addition, for comparison, the case of the first embodiment (curve a), the case of inserting iron sand into the inner space of a plurality of heavy transformer bodies 33 formed under the same conditions (curve b), or The experimental results are disclosed in the same diagram for each of the case where an iron core is inserted into the inner space (curve c) and the case where a silicon steel plate is inserted into the inner space (curve d). As a result, in the high frequency range, a relatively high transformation ratio constant can be obtained in any case, and in the low frequency range, by arranging a member with high magnetic permeability in the formed magnetic path portion, A high transformation ratio constant of around 90% could be obtained.

[0024] In each of the above embodiments, the periphery of the transformer body 3 and the gaps between the twists may be filled with a fine magnetic member. Alternatively, the transformer body 3 or the heavy transformer body 33 may be appropriately sealed and a magnetic fluid may be sealed inside. This has the advantage that the voltage conversion efficiency can be further improved and the frequency used can also be effectively lowered.

[0025]

[Effects of the Invention] As described above, according to the present invention, the transformer body is formed by twisting the primary coil wire material and the secondary coil wire material into a rope shape (twisted shape) while maintaining mutual insulation. However, since the transformer body is configured such that input terminals are provided at both ends of the wire for the primary coil, and output terminals are provided at both ends of the wire for the secondary coil, the main part of the voltage conversion The transformer body consists of the wire for the primary coil and the wire for the secondary coil, which makes it possible to significantly reduce the size of the main body of the transformer. By creating a structure in which the strands are twisted together in a rope-like (twisted) manner while maintaining mutual insulation, it is possible to maintain good voltage conversion efficiency, and especially in the high-frequency range, the skin effect on the coil cross section due to high-frequency operation is reduced. The coupling between the primary coil and the secondary coil is enhanced by reducing the internal inductance, and as mentioned above, the overall rope-like shape makes it suitable for installation, for example, along the internal corners of electronic equipment. Therefore, when this is used, it is possible to provide an unprecedented and superior transformer device that can significantly downsize the entire electronic device.

[Brief explanation of drawings]

[Fig. 1] Wiring diagram showing a first embodiment of the present invention

[Figure 2] Figure 1
Explanatory diagram showing a part of the transformer body inside

[Figure 3] An explanatory diagram showing the operation of a part of the transformer body in Figure 1

[Figure 4] Diagram showing an example of experimental results for the transformer body in Figure 1

[Figure 5] Diagram showing the types of transformer bodies used in the experiment in Figure 4

[Fig. 6] Wiring diagram showing the second embodiment

[Fig. 7] An explanatory diagram showing a part of the transformer body in Fig. 6.

[Fig. 8] Wiring diagram showing the third embodiment

FIG. 9 is an explanatory diagram showing a part of the transformer body in FIG. 8;

[Fig. 10] Wiring diagram showing the fourth embodiment

[Fig. 11] Wiring diagram showing the fifth embodiment

[Fig. 12] Wiring diagram showing the sixth embodiment

[Fig. 13] Wiring diagram showing the seventh embodiment

[Fig. 14] Wiring diagram showing the eighth embodiment

[Fig. 15] Wiring diagram showing the ninth embodiment

[Fig. 16] Wiring diagram showing the 10th embodiment

17 is a diagram showing an example of the experimental results of the heavy transformer main body (per unit length) in FIG. 16; FIG.

[Explanation of symbols]

1 Wire rod for primary coil 2 Wire rod for secondary coil 3 Transformer body 4, 41 , 42 , 43 , 5, 51 , 52 , 5
3, 61, 62, 63, 64 Relay cable 33 Heavy transformer body P1, P2, P2' Input terminal S1, S1', S2, S11, S12, S13
, S14 output terminal P1, S1 outward terminal P2, S2 outward terminal

Claims (13)

[Claims] 1. A transformer body is formed by twisting a primary coil wire material and a secondary coil wire material into a rope shape while maintaining mutual insulation, and the primary coil wire material in the transformer body is A transformer device characterized in that input terminals are provided at both ends, and output terminals are provided at both ends of a wire for a secondary coil. 2. The transformer device according to claim 1, wherein the lengths of the primary coil wire and the secondary coil wire in the transformer body are set to be the same length. 3. The primary coil wire in the transformer main body portion is constituted by a plurality of wires, and each of the primary coil wires is connected to a relay cable so that the current directions of the forward and return paths thereof are the same. 2. The transformer device according to claim 1, wherein the transformer device is connected via a. 4. The secondary coil wire in the transformer main body portion is constituted by a plurality of wires, and each of the secondary coil wires is arranged so that the direction of current in the forward and return paths thereof is the same. 2. The transformer device according to claim 1, wherein the transformer device is connected via a relay cable. 5. The transformer device according to claim 4, wherein the plurality of secondary coil wires in the transformer main body are of the same length. 6. The transformer device according to claim 4, wherein the plurality of secondary coil wires in the transformer body have different lengths. 7. Claim 1, 2, 3, 4, 5 or 6, wherein the secondary coil wire in the transformer main body portion is provided with an output terminal at an arbitrary location.
The transformer device described. 8. Claims 1 and 2, wherein the secondary coil wire is provided with output terminals at a plurality of locations with reference to one of the two output terminals. , 3, 4, 5 or 6. 9. The secondary coil wire in the transformer main body portion is composed of a plurality of wires having different lengths, and each secondary coil wire is provided with independent output terminals at both ends. Claim 1 characterized in that
7. The transformer device according to 2, 3, 4, 5 or 6. 10. A transformer body is formed by twisting the primary coil wire material and the secondary coil wire material into a rope shape while maintaining mutual insulation, and one end of the transformer body is provided with a primary side wire and a wire material for the secondary coil. Outgoing terminals on the secondary side are provided, and return terminals on the primary and secondary sides are provided at the other end of the transformer body, and the return terminals on the primary side are connected to one end of the transformer body via a relay cable. A transformer device characterized in that the outgoing terminal of the secondary side is arranged on the other end side of the transformer main body via a relay cable. 11. A transformer body is formed by twisting the wire for the primary coil and the wire for the secondary coil into a rope shape while maintaining mutual insulation, and one end of the transformer body is provided with a primary side and a wire for the secondary coil. Each outgoing terminal on the secondary side is provided, and each return terminal on the primary side and secondary side is provided at the other end of the transformer body, and the outgoing terminal on the secondary side is connected to the outgoing terminal on the secondary side via the outgoing line material on the secondary side. A transformer device, characterized in that the transformer is disposed on the other end side of the transformer main body, and a part or all of the secondary outgoing line material is wound around the transformer main body. 12. A transformer body is formed by twisting the primary coil wire material and the secondary coil wire material into a rope shape while maintaining mutual insulation, and one end of the transformer body is provided with a primary side and a wire material for the secondary coil. Outgoing terminals on the secondary side are provided, and return terminals on the primary side and the secondary side are provided at the other end of the transformer body, and the return terminals on the primary side are connected to the transformer body through the return line material on the primary side. At the same time, part or all of this primary return line material is wound around the transformer main body, and the secondary side outbound terminal is connected to the secondary side outgoing line material via the secondary side outgoing line material. A transformer device, characterized in that the transformer is disposed on the other end side of the transformer main body, and a part or all of the secondary outgoing line material is wound around the transformer main body. 13. A relatively long rope-shaped transformer body is formed by twisting the primary coil wire material and the secondary coil wire material into a rope shape while maintaining mutual insulation, and the transformer body is used as a solenoid. A heavy transformer body is formed by winding it into a shape or a coil spring shape, and input terminals are provided at both ends of the primary coil wire material in this heavy transformer body, and output terminals are provided at both ends of the secondary coil wire material. A transformer device characterized by: