CN2544465Y - Low-voltage power line wave-carried isolator - Google Patents
Low-voltage power line wave-carried isolator Download PDFInfo
- Publication number
- CN2544465Y CN2544465Y CN 02201162 CN02201162U CN2544465Y CN 2544465 Y CN2544465 Y CN 2544465Y CN 02201162 CN02201162 CN 02201162 CN 02201162 U CN02201162 U CN 02201162U CN 2544465 Y CN2544465 Y CN 2544465Y
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- power line
- resistance circuit
- circuit
- low
- shunt
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- Expired - Fee Related
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The utility model relates to a low-voltage power line carrier transmission isolator which can filter out the same frequency interference. The isolator comprises a parallel resonance circuit and is also equipped with a high-resistance circuit and a low-resistance circuit. The parallel resonance circuit and the high-resistance circuit are respectively arranged in series in a power line; the low-resistance circuit is arranged in parallel between the parallel resonance circuit and the high-resistance circuit as well as the power line. The utility model not only can eliminate general frequency interference and has isolation role, but also can effectively filter out the deadly same frequency interference on the receiver and ensure the normal work; moreover, the utility model clearly eliminates signal errors and has long transmission distance, improves the work performance of the power line carrier transmission network, enhances practicality, and has very considerable economic and social benefits.
Description
The utility model relates to the low-voltage power line carrier transmission, a kind of spacer assembly of energy filtering co-channel interference.
Utilize the low-voltage power line carrier transmission that various municipal systems are realized automatic management, as in low-voltage power line, have the carrier wave Automatic meter reading system that the kilowatt-hour meter of transceiver constitutes by collector that has transceiver and user, this is the most basic system, can save a large amount of manpower and materials, also can in time analyze failure conditions such as power transmission line loss and electric leakage, have huge economic benefit, generally receive publicity.
Present low-voltage power line is worn ripple transmission system performance, weak effect, mainly be load too abominable, change greatly, during not electricity consumption of user, load is bordering on open circuit, one family just reaches several kilowatts during electricity consumption, suitable tens ohm resistance, user's multi-load more is heavy more; Be that various power consumption equipments generations are multiple than strong jamming again, its frequency spectrum is very wide, and power line carrier is many, and the capacitive effect of electric equipment is serious with the high carrier frequency work in tens kilo hertzs to the 200 kilo hertzs frequency ranges, and carrier wave is difficult to transmission.Correlation technique continues to bring out for this reason.But the most laboratory laser propagation effect is better, can not satisfy actual instructions for use, does not also reach realistic scale.Disclose a kind of filter scheme among the CN2417641Y, it is to seal in the device that the carrier frequency shunt-resonant circuit constitutes before pi type filter.Certain buffer action is arranged between electrical network and user, can improve the abominable situation of transmitter load.The deficiencies in the prior art part mainly is: can only eliminate general frequency interferences, can not filtering to the fatal co-channel interference of receiver, can't operate as normal; Still exist the signal error code serious, drawback such as transmission range is limited.
The purpose of this utility model is to avoid weak point of the prior art, but and provides a kind of filtering co-channel interference, low voltage power line carrier isolator product that performance is good.
Can take following technical scheme to realize purpose.
The low voltage power line carrier isolator comprises the shunt-resonant circuit; Be provided with high resistance circuit and low resistance circuit, shunt-resonant circuit, high resistance circuit are serially connected in the power line, and low resistance circuit is attempted by between shunt-resonant circuit and high resistance circuit, the power line.
The relative prior art of the technical program has following advantage and effect:
Can not only eliminate general frequency interferences, have buffer action, and the effective filtering co-channel interference fatal to receiver, operate as normal guaranteed; Obvious erasure signal error code, long transmission distance; Improve the service behaviour of power line carrier transmission network, practicality improves, and the economic benefit social benefit is considerable.
In conjunction with the accompanying drawings, execution mode is described in further detail the content of the technical program.
Fig. 1 is the block diagram of low voltage power line carrier isolator;
Fig. 2,3,4 respectively is a kind of electrical schematic diagram of low voltage power line carrier isolator.
Embodiment 1, low voltage power line carrier isolator, by the carrier wave shunt-resonant circuit 1, the high resistance circuit 2 that are serially connected in the power line, the low resistance circuit 3 that is attempted by between shunt-resonant circuit and high resistance circuit, the power line constitutes.But shunt-resonant circuit, high resistance circuit only are serially connected in the phase line, and low resistance circuit one end is connected with zero line with mid point, other end of the high resistance circuit in shunt-resonant circuit.
Shunt-resonant circuit, high resistance circuit are by inductance L formation in parallel with capacitor C, and low resistance circuit is connected with capacitor C by inductance L and constituted.As shown in Figure 2.
Embodiment 3, low voltage power line carrier isolator on the basis of embodiment 1, but are connected in series the shunt-resonant circuit in the phase line, the high resistance circuit of serial connection in the zero line, and low resistance circuit is attempted by between shunt-resonant circuit output and high resistant circuit input end.
They all have preferable serviceability, result of use.
Claims (5)
1, a kind of low voltage power line carrier isolator, comprise the shunt-resonant circuit, it is characterized in that being provided with high resistance circuit and low resistance circuit, shunt-resonant circuit, high resistance circuit are serially connected in the power line, and low resistance circuit is attempted by between shunt-resonant circuit and high resistance circuit, the power line.
2, low voltage power line carrier isolator as claimed in claim 1 is characterized in that: shunt-resonant circuit, high resistance circuit are serially connected in the phase line, and low resistance circuit one end is connected with zero line with mid point, other end of the high resistance circuit in shunt-resonant circuit.
3, low voltage power line carrier isolator as claimed in claim 1 is characterized in that: be connected in series shunt-resonant circuit, high resistance circuit in phase line, the zero line, low resistance circuit is attempted by the midpoint of shunt-resonant circuit and high resistance circuit.
4, low voltage power line carrier isolator as claimed in claim 1 is characterized in that: be connected in series the shunt-resonant circuit in the phase line, and the high resistance circuit of serial connection in the zero line, low resistance circuit is attempted by between shunt-resonant circuit output and high resistant circuit input end.
5, as claim 1,2,3,4 described low voltage power line carrier isolators, it is characterized in that: shunt-resonant circuit, high resistance circuit are by inductance formation in parallel with electric capacity, and low resistance circuit is made of inductance and capacitances in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02201162 CN2544465Y (en) | 2002-01-24 | 2002-01-24 | Low-voltage power line wave-carried isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02201162 CN2544465Y (en) | 2002-01-24 | 2002-01-24 | Low-voltage power line wave-carried isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2544465Y true CN2544465Y (en) | 2003-04-09 |
Family
ID=33684086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02201162 Expired - Fee Related CN2544465Y (en) | 2002-01-24 | 2002-01-24 | Low-voltage power line wave-carried isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2544465Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769136A (en) * | 2020-12-31 | 2021-05-07 | 深圳市九洲电器有限公司 | Filter circuit, power supply equipment and power supply system |
-
2002
- 2002-01-24 CN CN 02201162 patent/CN2544465Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769136A (en) * | 2020-12-31 | 2021-05-07 | 深圳市九洲电器有限公司 | Filter circuit, power supply equipment and power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |