CN103905069A - Medium-short-wave solid-state transmitter provided with lightning protection device - Google Patents
Medium-short-wave solid-state transmitter provided with lightning protection device Download PDFInfo
- Publication number
- CN103905069A CN103905069A CN201210579635.2A CN201210579635A CN103905069A CN 103905069 A CN103905069 A CN 103905069A CN 201210579635 A CN201210579635 A CN 201210579635A CN 103905069 A CN103905069 A CN 103905069A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- lightning protection
- transmitter
- stage
- 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.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Abstract
Disclosed is a medium-short-wave solid-state transmitter provided with a lightning protection device. The transmitter includes an exciter circuit, an exciting pre-stage circuit, an exciting driving circuit, an exciter power-supply circuit, an exciting pre-stage and modulator power-supply circuit, a main power supply circuit, a modulator circuit and a power amplifying final-stage and output network circuit. The transmitter is characterized in that a discharging tube is connected between a source electrode and a drain electrode of each final-stage power amplifying tube in the power amplifying final-stage and output network circuit. The discharging tube connected between the source electrode and the drain electrode of each final-stage power amplifying tube is a gas-state discharging tube. The medium-short-wave solid-state transmitter provided with the lightning protection device is simple in structure, obvious in lightning protection effect and capable of overcoming defects that current solid-state medium-short-wave transmitters are not ideal in lightning protection effect and final-stage power amplifying tubes are easily to be damaged during a lightning stroke so that stopped broadcast is caused.
Description
Technical field
The invention belongs to broadcast science and technology field, particularly relate to the Design and manufacture of the intermediate waves solid state transmitter with lightning protection device.
Background technology
Current all solid state intermediate waves transmitter has become the main flow of intermediate waves transmitter, its feature efficient, stable, high-quality is that vacuum tube transmitter cannot be compared, but due to the use of solid state transmitter final stage power amplifier is field effect transistor, its single tube power is little, withstand voltage low, Antisurge current ability, therefore causes the anti lightning ability of solid state transmitter poor, when thunderbolt, be easy to the final stage power amplifier pipe of breaking, cause and break.Along with launching the perfect of station system configuration, this problem highlights day by day, the most station is laid qualified ground connection, has configured the lightning protection of antenna and allotting network, has carried out power lightning protection, has been used " 1+1 " transmitter configuration, but in the time that thunder and lightning is occurred frequently, still occur that primary transmitter power amplifier broken by thunder and lightning, emission system is switched to standby transmitter work, in the time also having little time to change main frame power board, the situation that standby host has been broken again, this situation has become the main factor that restriction intermediate waves broadcast safe is broadcasted.Meanwhile, need on-call maintenance because thunder and lightning damages transmitter, it is on duty that therefore the station needs more engineers and technicians, causes larger waste of human resource.Thunder and lightning also can cause transmitter large area to be damaged conventionally, and maintenance needs more device, also causes the waste of material.
The scientific and technical personnel of broadcast science and technology field, in practice a shocking preventing technology difficult problem for solid-state intermediate waves transmitter is carried out to unremitting effort.For example, publication number is 02222683.4, invention and created name is the utility model patent of " all solid state transmitter lightning protector ", a kind of all solid state transmitter lightning protector is provided, comprise all solid-state transmitter, antenna feeder, allotting network and the transmitting antenna being connected with this transmitter and the ball discharge that is arranged on transmitting antenna end, lightning protection inductance, graphic discharge device, is characterized in that one end of the parallel resonance device being made up of with electric capacity inductance is connected with transmitter output, other end ground connection.It both can make resonance frequency be high impedance; can make again the resonance frequency humorous flip-flop that involves in addition be Low ESR, and leak in time over the ground, effectively the clutter thunder and lightning composition beyond filtering resonance frequency; protection transmitter is uninterrupted, safe, broadcast reliably, realizes broadcast in zero second.The features such as it not only has reliable lightning protection function, and cost is low, easily installation but also have, and effect is remarkable also help the combination property that improves transmitter and technical indicator simultaneously.Although this utility model has certain effect to lightning protection, due to complicated structure, the parallel resonance device that has related to inductance and electric capacity formation is incorporated to system, very large to the frequency response of transmitter.Maintenance engineering amount is large simultaneously, is not desirable shocking preventing technology scheme.
Three. summary of the invention
The object of the invention is to manufacture and design a kind of intermediate waves solid state transmitter with lightning protection device, unsatisfactory to overcome the lightning protection effect of current solid-state intermediate waves transmitter, when thunderbolt, be easy to the final stage power amplifier pipe of breaking, cause the shortcoming of breaking.
The object of the present invention is achieved like this: a kind of intermediate waves solid state transmitter with lightning protection device, mainly comprise divider chain, excitation front stage circuits, excitation drive circuit, exciter power circuit, excitation prime and modulator power circuit, main power circuit, modulator circuit, not level and output network circuit of power amplifier, it is characterized in that: described power amplifier does not connect discharge tube between the source electrode of the each not level power tube in level and output network circuit and drain electrode.
The discharge tube connecting between the source electrode of each not level power tube and drain electrode is gaseous state discharge tube.
Take the present invention of above measure, simple in structure, lightning protection effect is remarkable, and the lightning protection effect that has overcome current solid-state intermediate waves transmitter is undesirable, and the final stage power amplifier pipe that is easy to when thunderbolt break, causes the shortcoming of breaking.
The present invention is described in further detail in conjunction with the accompanying drawings and embodiments more below.
Accompanying drawing explanation
Accompanying drawing 1 is circuit block diagram of the present invention:
Accompanying drawing 2 is not level power amplifier (one of them power board) and output network electrical schematic diagrams of the present invention (embodiment).
Embodiment
Accompanying drawing 1 has provided circuit block diagram of the present invention.With reference to accompanying drawing 1.
Intermediate waves solid state transmitter is general application, mainly comprises divider chain, excitation front stage circuits, excitation drive circuit, exciter power circuit, excitation prime and modulator power circuit, main power circuit, modulator circuit, not level and output network circuit of power amplifier.
Place of the present invention power amplifier not level and output network circuit in each not level power tube source electrode and drain electrode between connect discharge tube, make the lightning protection effect of intermediate waves solid state transmitter more remarkable.Embodiment uses all solid state medium wave broadcast transmitter of ZT-G1KW-III type that Chinese Harbin Zheng Tai broadcasting equipment Co., Ltd produces as basis, between the source electrode of the each not level power tube in level and output network circuit and drain electrode, does not connect discharge tube at power amplifier.The discharge tube connecting between the source electrode of each not level power tube and drain electrode is gaseous state discharge tube.
Accompanying drawing 2 has provided not level power amplifier (one of them power board) and the output network electrical schematic diagram of the embodiment of the present invention.
With reference to accompanying drawing 2.Between the source electrode of not grade power tube Q3IRF250, Q4 IRF250, Q5 IRF250, the Q6 IRF250 of one of them power board of not level power amplifier of all solid state medium wave broadcast transmitter of ZT-G1KW-III type and drain electrode, connect respectively venting state discharge tube P32R90, P42R90, P52R90, P62R90.The same venting state discharge tube P32R90 that connects between each not level power tube source electrode of other power board and drain electrode.
Gas discharge tube is in discharging gap, to be filled with suitable gas medium (argon gas or neon), is equipped with highly active electronic emission material and the electric discharge mechanism of igniting, and is a kind of gas discharge device of special cermet structure.Under normal circumstances; discharge tube is because of its distinctive high impedance (>=1000M Ω) and low electric capacity (≤2pF) characteristic; in as protection component line attachment time; to the normal work of circuit almost without any adverse influence; and in the time that harmful instantaneous overvoltage is scurried into, the first breakdown electric discharge of discharge tube.Its impedance declines rapidly, is almost short-circuit condition.Harmful electric current is let out to the earth by ground wire; simultaneously by limiting voltage on the arc light of discharge tube (about 20V); harmful instantaneous overvoltage and overcurrent are eliminated; thereby circuit and element are protected; serve as after loss of voltage; discharge tube returns to rapidly again high impedance status, and circuit continues normal work.
Operation principle of the present invention is as follows: with reference to accompanying drawing 2.From figure, we can find out, if there is thunder and lightning to enter, its path is: enter from the output of transmitter, after filtering and matching network (inductance L 1, inductance L 2, inductance L 3, capacitor C 1, capacitor C 5) enter synthetic high frequency transformer T2, then enter power tube (Q3, Q4, Q5, Q6), discharge tube (P3, P4, P5, P6).From above-mentioned parts, can find out, the ceiling capacity of most possible restriction thunder and lightning, thereby discharge tube not being hit to what split is the high frequency transformer T2 making by FERRITE CORE, when powerful thunder and lightning enters this transformer, will make the magnetic core of transformer enter magnetic saturation state, thereby the other end (being connected on power tube) that makes transformer produces power and is no longer directly proportional to the power of thunder and lightning, but be limited on certain numerical value, the electric current that the power of this value produces does not reach the shock-resistant electric current of discharge tube, therefore, discharge tube does not damage.Both can effectively protect power tube, and can avoid again discharge tube to be broken by thunder and lightning.
Claims (2)
1. one kind has the intermediate waves solid state transmitter of lightning protection device, mainly comprise divider chain, excitation front stage circuits, excitation drive circuit, exciter power circuit, excitation prime and modulator power circuit, main power circuit, modulator circuit, not level and output network circuit of power amplifier, it is characterized in that: described power amplifier does not connect discharge tube between the source electrode of the each not level power tube in level and output network circuit and drain electrode.
2. Ju intermediate waves solid state transmitter claimed in claim 1, is characterized in that: the discharge tube connecting between the source electrode of each not level power tube and drain electrode is gaseous state discharge tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579635.2A CN103905069B (en) | 2012-12-28 | 2012-12-28 | A kind of intermediate waves solid state transmitter with lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579635.2A CN103905069B (en) | 2012-12-28 | 2012-12-28 | A kind of intermediate waves solid state transmitter with lightning protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103905069A true CN103905069A (en) | 2014-07-02 |
| CN103905069B CN103905069B (en) | 2016-01-13 |
Family
ID=50996244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210579635.2A Expired - Fee Related CN103905069B (en) | 2012-12-28 | 2012-12-28 | A kind of intermediate waves solid state transmitter with lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103905069B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851996A (en) * | 2005-10-18 | 2006-10-25 | 华为技术有限公司 | Siganl thunder-proof device |
| CN201001035Y (en) * | 2007-01-05 | 2008-01-02 | 深圳市麦克海鹏信电子有限公司 | RF lightning protection device |
| CN201438602U (en) * | 2009-03-11 | 2010-04-14 | 深圳市海鹏信电子股份有限公司 | Broadband radio frequency lighting arrester |
-
2012
- 2012-12-28 CN CN201210579635.2A patent/CN103905069B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851996A (en) * | 2005-10-18 | 2006-10-25 | 华为技术有限公司 | Siganl thunder-proof device |
| CN201001035Y (en) * | 2007-01-05 | 2008-01-02 | 深圳市麦克海鹏信电子有限公司 | RF lightning protection device |
| CN201438602U (en) * | 2009-03-11 | 2010-04-14 | 深圳市海鹏信电子股份有限公司 | Broadband radio frequency lighting arrester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103905069B (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207339642U (en) | A kind of POE interchangers DC power supply | |
| CN203301142U (en) | Anti-lightning protection circuit of direct-current system | |
| CN203574361U (en) | Antenna feeder lightning protection device of RF radio frequency device for LED control | |
| CN201001035Y (en) | RF lightning protection device | |
| CN103296661A (en) | Lightning protection circuit of direct-current system | |
| US20130229733A1 (en) | Lightening Protection Apparatus Using TN-C Common Ground | |
| CN104377673A (en) | Surge protective device and method | |
| CN103905069B (en) | A kind of intermediate waves solid state transmitter with lightning protection device | |
| JP2007312466A (en) | Thunder protection communication system | |
| CN202190074U (en) | Lightning protection device specially for POE network power supply apparatus | |
| CN203645317U (en) | Anti-thunder module and anti-thunder box | |
| CN101877473B (en) | Protection circuit in surge protector used for high-definition camera | |
| CN203734304U (en) | Microminiature two-level protection channel surge protector | |
| CN201438602U (en) | Broadband radio frequency lighting arrester | |
| CN203387174U (en) | Device and system for concentrated grounding protection and lightning protection in distribution system | |
| CN202524073U (en) | Overvoltage protection circuit and communication equipment | |
| CN203660530U (en) | Equipotential lightning arrester for optical transmitter and receiver | |
| JP6872862B2 (en) | Train radio system | |
| CN104377677B (en) | Surge protection device of end-span method active Ethernet | |
| CN202797937U (en) | Two-in-one antenna lightning protection device | |
| CN104283223A (en) | Fling-cut switch over-voltage recovering suppression circuit for parallel capacitors | |
| CN204156522U (en) | A kind of surge protector of end cross-over connection method active Ethernet | |
| CN103280794A (en) | Surging resistant and reverse-connection resistant port | |
| CN204947586U (en) | The smart machine lightning protection interface of intelligent transportation system | |
| CN202042891U (en) | Lightning protection device of airplane surface antenna system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20171228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |