WO2005109455A1 - 通信用パルストランス - Google Patents
通信用パルストランス Download PDFInfo
- Publication number
- WO2005109455A1 WO2005109455A1 PCT/JP2004/006606 JP2004006606W WO2005109455A1 WO 2005109455 A1 WO2005109455 A1 WO 2005109455A1 JP 2004006606 W JP2004006606 W JP 2004006606W WO 2005109455 A1 WO2005109455 A1 WO 2005109455A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pulse transformer
- conductor
- wire
- communication
- layer conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
- H01F19/08—Transformers having magnetic bias, e.g. for handling pulses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F2017/067—Core with two or more holes to lead through conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F2027/2833—Wires using coaxial cable as wire
Definitions
- the present invention relates to, for example, a communication pulse transformer for insulating a modulation / demodulation circuit from a power line.
- one turn of a linear conductor forms the primary winding, and a secondary winding is wound around the transformer core multiple times.
- a plurality of electrostatic shielding conductors are arranged around the primary winding, and the plurality of electrostatic shielding conductors are alternately divided into two groups and connected to the potential fixing point.
- the pulse transformer converts the modulated signal output from the modulation and demodulation circuit into a differential signal (differential signal). ) Is superimposed on the power line, but since the power line has a double reciprocating structure, the electric fields of the differential signals are canceled out with mutually opposite characteristics.
- the modulated signal output from the modulation / demodulation circuit may be transmitted directly to the secondary power line as a common mode signal.
- the electric field of the common mode signal is not canceled out each other like the electric field of the differential signal, so that unnecessary radiation leaks out of the power line (in this case, the power line functions as an antenna for transmitting the common mode signal). May interfere with the reception of normal broadcast waves.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-270430 (Pages 4 to 6, FIG. 1) Since the conventional pulse transformer is configured as described above, the static pulse generated on the primary winding side is generated. The power transfer surge (unnecessary noise) is prevented from entering the secondary winding. For example, if the power supply is installed between a modulation / demodulation circuit and a power line, the modulation signal output from the modulation / demodulation circuit will be a common mode signal. However, since it is transmitted directly to the power line on the secondary side, unnecessary radiation may leak to the outside of the power line.
- the present invention has been made to solve the above problems, and has as its object to provide a communication pulse transformer capable of suppressing transmission of a common mode signal from a primary side to a secondary side. Disclosure of the invention
- a coaxial cable-shaped double-layered wire is wound around a core a plurality of times, and a center wire of the double-layered wire is used as a primary winding, while one end of an outer braided wire of the center wire is used. Is grounded. As a result, transmission of a common mode signal from the primary side to the secondary side can be suppressed.
- FIG. 1 is a perspective view showing a communication pulse transformer according to Embodiment 1 of the present invention.
- FIG. 2 is a sectional view showing a two-layered conductor of the communication pulse transformer according to Embodiment 1 of the present invention.
- FIG. 3 is a circuit diagram showing an application example of the communication pulse transformer according to the first embodiment of the present invention.
- FIG. 4 is a perspective view showing a communication pulse transformer according to Embodiment 2 of the present invention.
- FIG. 5 is a perspective view showing a communication pulse transformer according to Embodiment 3 of the present invention.
- FIG. 1 is a perspective view showing a communication pulse transformer according to Embodiment 1 of the present invention
- FIG. 2 is a cross-sectional view showing a two-layer conductor of the communication pulse transformer according to Embodiment 1 of the present invention. .
- an eyeglass-shaped core 1 is made of a magnetic material such as iron, for example, and has through holes la and lb.
- the coaxial cable-shaped double-layered wire is wound around the eyeglass-shaped core 1 several times, and the center wire 2 constitutes the secondary winding, while the outer wire of the center wire 2 is formed.
- One end of the assembled wire 3 is grounded.
- One end of the ground wire 4 is connected to the outer braided wire 3 forming a two-layer wire, and the other end is connected to the ground.
- the single-layer wire 5 is wound around the eyeglass-shaped core 1 multiple times to form a secondary winding.
- FIG. 3 is a circuit diagram showing an application example of the communication pulse transformer according to the first embodiment of the present invention.
- a modulation / demodulation circuit 11 is connected to a center conductor 2 which is a primary winding of a communication pulse transformer. Then, the communication data to be transmitted is modulated, and the modulated signal is output to the center conductor 2 of the communication pulse transformer, while the modulation signal to be received is input from the center conductor 2 of the communication pulse transformer and demodulated.
- the single-layer conductor 5 which is the secondary winding of the communication pulse transformer, is connected to the power line 13 via the insulating capacitor 12.
- a coaxial cable-shaped two-layered wire composed of the center wire 2 and the outer braided wire 3 is inserted from the near side of the through hole 1 a of the eyeglass-shaped core 1, taken out from the back side, and By being inserted from the back side of the through hole 1 b of the core 1 and taken out from the near side, it is wound around the eyeglass-shaped core 1.
- the coaxial cable-shaped two-layer conductor is wound around the eyeglass-shaped core 1 several times, so that the center conductor 2 forms the primary winding. At this time, the outer braided wire 3 surrounding the center wire 2 is grounded to the ground via the ground wire 4.
- the single-layer conductor 5 is, for example, located at the back of the through hole 1 a of the eyeglass-shaped core 1. Is inserted from the near side, is taken out from the near side, is further inserted from the near side of the through hole 1 b of the glasses-shaped core 1, is taken out from the back side, and is wound around the glasses-shaped core 1.
- the single-layer wire 5 is wound around the eyeglass-shaped core 1 a plurality of times to form a secondary winding.
- the modulation / demodulation circuit 11 and the power line 13 must be insulated. Installed between 11 and power line 13. .
- the modulation / demodulation circuit 11 Since the modulation / demodulation circuit 11 is connected to the center conductor 2 which is the primary winding of the communication pulse transformer, when modulating the communication data to be transmitted, the modulation signal is output to the center conductor 2 of the communication pulse transformer. I do.
- the modulated signal is output to single-layer conductor 5 which is the secondary winding of the pulse transformer for communication, and transmitted to a communication partner (not shown) via power line 13.
- the modulated signal when the modulated signal reaches the single-layer conductor 5 of the communication pulse transformer, a current flows through the single-layer conductor 5 so as to pass through the glasses-shaped core 1 of the communication pulse transformer.
- the voltage of the modulation signal is induced on the primary side of.
- the modulated signal is output to the center conductor 2 which is the primary winding of the communication pulse transformer, and is input to the modulation / demodulation circuit 11.
- the modulation / demodulation circuit 11 Upon receiving a modulation signal output from a communication partner (not shown), the modulation / demodulation circuit 11 demodulates the modulation signal.
- the primary winding is not a coaxial cable-like two-layer conductor as shown in Fig. 2, but a simple single-layer conductor.
- the modulated signal on the primary side is directly transmitted to the secondary side as a common mode signal due to the capacitive coupling between the primary and secondary windings of the communication pulse transformer.
- the primary winding of the communication pulse transformer is a coaxial cable-like two-layer conductor as shown in FIG. 2, and the center conductor 2 of the two-layer conductor is grounded at one end to ground.
- the common mode signal transmitted via the capacitive coupling between the primary winding and the secondary winding, which is wrapped by the outer braided conductor 3 It does not flow to the single-layer conductor 5, which is the next winding.
- the coaxial cable-shaped double-layered wire is wound around the eyeglass-shaped core 1 several times, and the center wire 2 of the double-layered wire is used as the primary winding.
- the center wire 2 of the double-layered wire is used as the primary winding.
- one end of the outer braided conductor 3 of the center conductor 2 is grounded, transmission of the common mode signal from the primary side to the secondary side can be suppressed. This has the effect of suppressing unnecessary radiation leaking from the line 13.
- Embodiment 1 described above a case where a two-layer coaxial cable-like conductor and a single-layer conductor 5 are wound a plurality of times around an eyeglass-shaped core 1 provided with through holes la and 1b is described.
- the communication pulse transformer may be configured by winding the coaxial cable-like two-layer conductor and the single-layer conductor 5 around the ring-shaped core 6 a plurality of times.
- the operation when the communication pulse transformer of FIG. 4 is applied to the circuit of FIG. 3 is the same as that of the communication pulse transformer of FIG.
- a coaxial cable-shaped two-layered conductor consisting of a center conductor 2 and an outer braided conductor 3 is inserted, for example, from the near side of the through hole 6a of the left ring-shaped core 6 in the figure and taken out from the back side. Further, it is inserted into the through hole 6a of the right ring-shaped core 6 from the back side and taken out from the near side, so that it is wound around the two ring-shaped cores 6.
- the coaxial cable-shaped two-layer conductor is wound around the two ring-shaped cores 6 a plurality of times, so that the center conductor 2 forms a primary winding. At this time, the outer braided wire 3 surrounding the center wire 2 is grounded to the ground via the ground wire 4.
- the single-layer conductor 5 is inserted through the through hole 6 a of the ring-shaped core 6 on the left side in the figure, is taken out from the near side, and is further removed through the ring-shaped core 6 on the right side. By being inserted from the near side of the hole 6a and taken out from the back side, it is wound around the two ring-shaped cores 6.
- the single-layer wire 5 is wound around the two ring-shaped cores 6 a plurality of times to form a secondary winding.
- the coaxial cable-shaped two-layered conductor and the single-layered conductor 5 are wound around two ring-shaped cores 6, but the present invention is not limited to this.
- the coaxial cable-shaped two-layer wire and the single-layer wire 5 may be wound around the core 6, or the coaxial cable-shaped two-layer wire and the single-layer wire 5 may be wound around three or more ring-shaped cores 6. May be.
- the coaxial cable-shaped two-layer conductor and the single-layer conductor 5 are wound around the eyeglass-shaped core 1 having the through holes la and 1b a plurality of times. As shown in FIG. 5, a coaxial cable-shaped two-layer conductor and a single-layer conductor 5 may be wound around the outer core 7 a plurality of times to form a communication pulse transformer.
- the communication pulse transformer according to the present invention is, for example, provided between a modulation / demodulation circuit and a power line when a power line is used as a signal communication line, and insulates the modulation / demodulation circuit from the power line. It is suitable for use in modems for power communication.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/006606 WO2005109455A1 (ja) | 2004-05-11 | 2004-05-11 | 通信用パルストランス |
| JP2006512908A JPWO2005109455A1 (ja) | 2004-05-11 | 2004-05-11 | 通信用パルストランス |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2004/006606 WO2005109455A1 (ja) | 2004-05-11 | 2004-05-11 | 通信用パルストランス |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005109455A1 true WO2005109455A1 (ja) | 2005-11-17 |
Family
ID=35320457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/006606 Ceased WO2005109455A1 (ja) | 2004-05-11 | 2004-05-11 | 通信用パルストランス |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPWO2005109455A1 (ja) |
| WO (1) | WO2005109455A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3278344A2 (en) * | 2015-03-31 | 2018-02-07 | Teledyne e2v (UK) Limited | Triaxial cable transformer |
| WO2025157548A1 (de) * | 2024-01-22 | 2025-07-31 | Maschinenfabrik Reinhausen Gmbh | Koaxialtransformator und verfahren zur herstellung eines koaxialtransformators |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59114808A (ja) * | 1982-12-21 | 1984-07-03 | Toyo Electric Mfg Co Ltd | 変圧器 |
| JPH07192926A (ja) * | 1993-12-27 | 1995-07-28 | Tdk Corp | Lan用インターフェースモジュール |
| JPH07201590A (ja) * | 1993-12-28 | 1995-08-04 | Hitachi Ferrite Denshi Kk | Isdn用パルストランス |
| JP2001210526A (ja) * | 2000-01-24 | 2001-08-03 | Toko Inc | 面実装用バルンコイル |
-
2004
- 2004-05-11 JP JP2006512908A patent/JPWO2005109455A1/ja active Pending
- 2004-05-11 WO PCT/JP2004/006606 patent/WO2005109455A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59114808A (ja) * | 1982-12-21 | 1984-07-03 | Toyo Electric Mfg Co Ltd | 変圧器 |
| JPH07192926A (ja) * | 1993-12-27 | 1995-07-28 | Tdk Corp | Lan用インターフェースモジュール |
| JPH07201590A (ja) * | 1993-12-28 | 1995-08-04 | Hitachi Ferrite Denshi Kk | Isdn用パルストランス |
| JP2001210526A (ja) * | 2000-01-24 | 2001-08-03 | Toko Inc | 面実装用バルンコイル |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3278344A2 (en) * | 2015-03-31 | 2018-02-07 | Teledyne e2v (UK) Limited | Triaxial cable transformer |
| GB2536931B (en) * | 2015-03-31 | 2020-03-11 | Teledyne E2V Uk Ltd | A transformer |
| WO2025157548A1 (de) * | 2024-01-22 | 2025-07-31 | Maschinenfabrik Reinhausen Gmbh | Koaxialtransformator und verfahren zur herstellung eines koaxialtransformators |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2005109455A1 (ja) | 2008-03-21 |
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