CN1564473A - Power line high speed data communication capacity broadband coupler of low voltage distributing network - Google Patents
Power line high speed data communication capacity broadband coupler of low voltage distributing network Download PDFInfo
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- CN1564473A CN1564473A CN 200410006281 CN200410006281A CN1564473A CN 1564473 A CN1564473 A CN 1564473A CN 200410006281 CN200410006281 CN 200410006281 CN 200410006281 A CN200410006281 A CN 200410006281A CN 1564473 A CN1564473 A CN 1564473A
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Abstract
Disclosed coupling device includes transmission transformer, coupling capacitance, transient state blanketing diodes (D1 and D2). Primary coil and secondary coil of transmission transformer are enwound on magnetic core. The secondary coil is connected to modem, and primary coil is connected to D1 and D2 in parallel, but poles of D1 and D2 are inverted. One end of the D1 and D2 in parallel is connected to one end of capacitance C1, and the other end is connected to a power line. The other end of capacitance C1 is connected to another power line. The device features vary low bandpass attenuation, and favorable linear phase-frequency characteristics etc.
Description
Technical field
The present invention relates to a kind of power line channel coupling device, belong to electronic technology field at low-voltage network realization high-speed data communication.
Background technology
Historical background and present situation: the transmission that utilizes power line to carry out voice-and-data has the history of decades, but all is the low speed voice communications versus data communications in the medium and low frequency scope.Along with the development of information technology and the arrival of information age, people to the demand of high-speed data service also in continuous growth.In numerous alternative data access, utilize existing low-voltage distributing line as the carrier transmitting high speed data, have remarkable advantages undoubtedly.
In the last few years, the research in high speed power line communication technology and application facet both at home and abroad made significant progress, and existing several high speed power line communication systems and end product thereof are at home and abroad tried out.
The power line coupling device is a very important link in power line high speed carrier communication system, and safety, efficient, an easy high-frequency carrier signal coupling device are the keys that realizes the power line high-speed communication.The power line coupling device is accompanied by the application of power line carrier communication and the history that development has decades, but in traditional mesohigh PLC communication system, mainly be based on point-to-point low speed transmissions, carrier frequency is in 500kHz, the carrier channel impedance is basicly stable, and its design and application technology are ripe and perfect.Yet, the carrier frequency that the power line carrier communication of transmitting high speed data uses on the low-voltage network power circuit is up to 38MHz, data rate has also arrived 200Mbps, be mainly used in the access of transmission, last kilometer of the Internet of distribution automation data and intelligent domestic system network etc., this is different from traditional PLC communication system fully.
On the other hand, realize high-speed wideband communication, must adopt complicated communication modulating technology and coding techniques.Equally, to having higher requirement as the coupling device of carrier signal input and output.As: the linearity of transmission characteristic in broad frequency range, low time delay and phase-shift characterisitc are to adapt to from the high speed data transfer of hundreds of kbps～tens Mbps; Low transmission attenuation and on the low-impedance load circuit high coupling efficiency, be vital to the raising of communication performance; Equally, because coupling device directly is connected with power line, fail safe also is the aspect that will consider.Like this, effectively the development of power line high-speed communication coupled modes and Design of device thereof is an important content realizing high speed power line communication.
Summary of the invention
The purpose of this invention is to provide have wide frequency range, extremely low pass band damping, good impedance setting, favorable linearity phase-frequency characteristic and than a kind of coupling device of low delay character and higher-security, it is installed between high speed power line communication equipment (modulation equipment) and the power line, realizes the safety isolation of telecommunication circuit (high speed power line communication equipment) and power line and realizes the coupling (injection of signal and extraction) of high-frequency carrier signal at the power line passage.
The invention provides a kind of power line channel coupling device to achieve these goals, restrain diode comprising transmission variables device, coupling capacitance, transient state; Described transmission variables utensil has magnetic core and the primary coil and the secondary coil that are wrapped on the magnetic core, described secondary coil is connected to modulation equipment, its primary coil connects the both positive and negative polarity that two transient states are restrained diode, this transient state is restrained diode both positive and negative polarity and is connected in parallel on the contrary between the two ends of primary coil of transmission variables device T1, the end that this transient state in parallel is restrained diode is connected with an end of coupling capacitance, and the other end is connected with a power line; The other end of described coupling capacitance is connected to another power line.
Description of drawings
Below in conjunction with description of drawings the specific embodiment of the present invention, wherein:
Fig. 1 is four port networks for the coupling device equivalence of electric capacity broadband;
Fig. 2 is electric capacity broadband coupling device circuit theory diagrams; And
Fig. 3 is the external use scheme of installation of electric capacity broadband coupling device.
Embodiment
High speed power line communication system capacitance of the present invention broadband coupling device is a kind of direct coupling device, is serially connected in during use between high speed power line communication equipment (modulation equipment) and the supply socket.This electric capacity broadband coupling device can equivalence be one four port network, as shown in Figure 1.The left side of the electric capacity broadband coupling device 1 shown in Fig. 1 connects modulation equipment, the right side connects power line, it uses the signal coupling that capacitive couplings mechanism realizes high-frequency carrier signal and power line, its principle of compositionality is a high-pass filtering circuit, it has very big decay to the 50Hz power frequency component, and very little to the high-frequency carrier signal decay, to realize the low decay transmission of high-frequency carrier signal; It presents higher resistance to high-frequency carrier signal simultaneously, has reduced reflection loss and the electric capacity absorption loss of power consumption equipment to high-frequency carrier signal, thereby has improved coupling efficiency.
Referring to Fig. 2, the electric capacity broadband coupling device 1 among Fig. 1 comprises transmission variables device T1, coupling capacitance C1, transient state supression diode D1, D2, piezo-resistance MOV, protective tube FUSE1 and resistance R 1.
Shown transmission variables device T1 is made of two groups of coils on the magnetic core that is wrapped in high permeability.The secondary coil of transmission variables device T1 is connected to modulation equipment 2, its primary coil connects two transient states and restrains diode D1, the both positive and negative polarity of D2, this transient state is restrained diode D1, the D2 both positive and negative polarity is connected in parallel between the two ends of primary coil of transmission variables device T1 on the contrary, this transient state in parallel is restrained diode D1, the end of D2 is connected with the end of parallel resistor R1 and coupling capacitance C1, and the other end is connected with a power line with the end of described piezo-resistance MOV, the other end of this parallel resistor R1 and coupling capacitance C1 is connected to the other end of described piezo-resistance MOV, and being connected to the end of protective tube FUSE1, the other end of this protective tube FUSE1 is connected to another power line.
In the line transmission variables device T1 and coupling capacitance C1 of serial connection constituted high pass network, supposes that the inductance of this transmission variables device T1 is L, and the capacitance of coupling capacitance C1 is C, and this High Pass Filter Cutoff Frequency is
Transient state is restrained diode D1, D2 and piezo-resistance MOV and protective tube and has been constituted protective circuit.The effect that transient state is restrained diode D1, D2 is to prevent disturbing pulse, and the effect of piezo-resistance MOV is to prevent thunderbolt.
Also to select suitable span to each parts among the figure as required in order to realize the broadband coupling.
For example, the puncture voltage of piezo-resistance MOV is for greater than 250 volts and response time with microsecond level;
The clamping voltage that transient state is restrained diode D1, D2 is the 15-25 volt, and the response time with nanosecond;
The inductance value L of transmission variables device T1 is 10～20 μ H, and the permeability of the magnetic core that it is used is greater than 5000, and two groups of coils on the magnetic core all adopt rope-lay conductor, disturbs reducing, and the transformation ratio of this transmission variables device T1 can be 1: 1 or 1: 2;
Resistance R 1 is selected the resistance about 1M Europe for use;
The span of coupling capacitance C1 is 0.1～0.47 μ F, and its withstand voltage is more than or equal to 275 volts.
Above provide concrete span as an example, but the present invention is not limited to these spans, but can changes according to concrete performance requirement.If for example do not need anti-lightning strike protection then can remove piezo-resistance MOV, if do not need short-circuit protection, then can remove protective tube FUSE1, if do not need electrocution-proof protection, then can remove resistance R 1, and so on.
Coupling device of the present invention is different from general power line carrier coupling device, and it is a kind of high-frequency wideband coupling device, can satisfy the broadband coupling in 1～38MHz frequency band range, tool
Very low pass band damping and suitable resistance property are arranged, comprised defencive functions such as anti-lightning strike, anti-overvoltage simultaneously in the device.Show following some:
1) signal of broad frequency range transmission.The high-pass filtering network that the transmission line transformer T1 of well-designed processing and high-frequency coupling capacitor C 1 formed has guaranteed effective coupling of high-frequency carrier signal in the broad frequency range from 1MHz to 38MHz, wants wide many than capacitive coupling device passband commonly used.
2) extremely low pass band damping.The insertion of high-frequency carrier signal decay 1～3dB in the passband scope from 1MHz to 38MHz, and power frequency and Harmonic Interference thereof are had very high insertion loss, isolated the high pressure power frequency component substantially, stop it to enter telecommunication circuit.Coupling device can directly link to each other with power line like this, realizes the direct coupling of high-frequency carrier signal.
3) good impedance setting in the broad frequency range.This contrive equipment is designed to the Low ESR input, high impedance output.The power circuit impedance variation reduces greatly to the influence of high-frequency carrier signal coupling effect like this.Same such impedance setting function is to realize in very wide frequency band range, wants wide a lot of than arrowband coupler and other network carrier impedance setting device frequency range.
4) in addition, this contrive equipment filter network favorable linearity phase～frequency characteristic and low delay character has satisfied the requirement of high-speed wideband communication to coupling device frequency plot characteristic substantially.
5) install reliable security performance.Take certain safeguard measures such as anti-thunder and lightning, overvoltage and static in this contrive equipment design, guaranteed the fail safe and the reliability of device.
Referring to Fig. 3, when using electric capacity of the present invention broadband coupling device 1, high speed power line communication electric capacity broadband coupling device is serially connected between high speed power line communication equipment (modulation equipment 2) signal input output end mouth and the power line, also this device circuit can be built in the interior part of high speed power line communication equipment (modulation equipment 2) circuit as modulation equipment transmission circuit.
Can also this invention coupling device is external as isolated system, be serially connected in use as shown in Figure 3 between high speed power line communication equipment (modulation equipment) and the supply socket 3.
Although above invention has been described, foregoing description is that those of ordinary skills can not break away from the various changes of spirit of the present invention to it for illustrative purposes.
Claims (11)
1. a power line channel coupling device is restrained diode (D1 and D2) comprising transmission variables device (T1), coupling capacitance (C1), transient state;
Described transmission variables device (T1) has magnetic core and the primary coil and the secondary coil that are wrapped on the magnetic core, described secondary coil is connected to modulation equipment (2), its primary coil connects the both positive and negative polarity that two transient states are restrained diode (D1 and D2), this transient state is restrained diode (D1 and D2) both positive and negative polarity and is connected in parallel on the contrary between the two ends of primary coil of transmission variables device (T1), the end that this transient state in parallel is restrained diode (D1 and D2) is connected with an end of coupling capacitance (C1), and the other end is connected with a power line; The other end of described coupling capacitance (C1) is connected to another power line.
2. coupling device according to claim 1, wherein said coupling capacitance (C1) also are in parallel with a resistance (R1).
3. coupling device according to claim 1, wherein said coupling capacitance (C1) is connected to power line by protective tube (FUSE1).
4. coupling device according to claim 1, wherein a piezo-resistance (MOV) also in parallel between two power lines.
5. according to any one the described coupling device in the claim 1～4, the inductance value of wherein said transmission variables device (T1) is 10～20 μ H.
6. according to any one the described coupling device in the claim 1～4, the permeability of the magnetic core of wherein said transmission variables device (T1) is greater than 5000, and two groups of coils on the magnetic core all adopt rope-lay conductor.
7. according to any one the described coupling device in the claim 1～4, the span of wherein said coupling capacitance (C1) is 0.1～0.47 μ F.
8. coupling device according to claim 2, the resistance of wherein said resistance (R1) is about 1M Ω.
9. coupling device according to claim 4, the puncture voltage of wherein said piezo-resistance (MOV) is greater than 250 volts.
10. coupling device according to claim 1, the transformation ratio of wherein said transmission variables device (T1) is 1: 1 or 1: 2.
11. coupling device according to claim 1, the withstand voltage of wherein said coupling capacitance (C1) is more than or equal to 275 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100062818A CN100521566C (en) | 2004-03-23 | 2004-03-23 | Power line high speed data communication capacity broadband coupler of low voltage distributing network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100062818A CN100521566C (en) | 2004-03-23 | 2004-03-23 | Power line high speed data communication capacity broadband coupler of low voltage distributing network |
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| CN1564473A true CN1564473A (en) | 2005-01-12 |
| CN100521566C CN100521566C (en) | 2009-07-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059625A (en) * | 2016-06-21 | 2016-10-26 | 国网福建省电力有限公司 | Method for achieving medium-voltage communication by using arrester |
| WO2021057054A1 (en) * | 2019-09-29 | 2021-04-01 | 华为技术有限公司 | Interface circuit, string, and system applicable to power line communication |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2115622U (en) * | 1992-01-30 | 1992-09-09 | 赵家源 | High frequency carrier channels mixed coupling filter |
| CN1032098C (en) * | 1993-03-02 | 1996-06-19 | 张会庭 | Power line using telephone network system |
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2004
- 2004-03-23 CN CNB2004100062818A patent/CN100521566C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059625A (en) * | 2016-06-21 | 2016-10-26 | 国网福建省电力有限公司 | Method for achieving medium-voltage communication by using arrester |
| CN106059625B (en) * | 2016-06-21 | 2019-08-13 | 国网福建省电力有限公司 | A method of using arrester realize in press communication |
| WO2021057054A1 (en) * | 2019-09-29 | 2021-04-01 | 华为技术有限公司 | Interface circuit, string, and system applicable to power line communication |
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| Publication number | Publication date |
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| CN100521566C (en) | 2009-07-29 |
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