CN2270302Y - CATV multifunctional power supply unit - Google Patents
CATV multifunctional power supply unit Download PDFInfo
- Publication number
- CN2270302Y CN2270302Y CN 96233722 CN96233722U CN2270302Y CN 2270302 Y CN2270302 Y CN 2270302Y CN 96233722 CN96233722 CN 96233722 CN 96233722 U CN96233722 U CN 96233722U CN 2270302 Y CN2270302 Y CN 2270302Y
- Authority
- CN
- China
- Prior art keywords
- catv
- transformer
- power supply
- negative pole
- electromagnetic switch
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a CATV multifunctional power supply device, which comprises an electromagnetic switch J< 1 >, a transformer B, a frequency converting circuit (1) which is provided with radio-frequency input and output ends N, M, and a control circuit (2) which can realize switching of the electromagnetic switch J< 1 > through taking out alternate current signals from a CATV amplifier. The CATV multifunctional power supply device is applied to power supply of a distance transmission system of a cable TV, and the CATV multifunctional power supply device has functions of over current, over voltage, and a short circuit, lightning protection, automatic time delay, an automatic restoring function, and an input and an output functions of radio frequency signals.
Description
The utility model relates to the power supply unit with emergency protective circuit device, in particular for the power supply unit with emergency protective device of cable TV.
Existing C ATV (cable TV) charger (also claims that the line powering device is (Line Power Unit) less stable in use, function is less, has short circuit as the nine continent board CATV centrally connected power supply power supplys of selling on the market (JZ40AC), over-current over-voltage protection, but its main weak point has two, the one, its control circuit complexity, functional reliability is not high, easily breaks down; The 2nd, it does not possess automatic time delay and auto restore facility, and this brings many troubles just for the remote CATV system that transmits.Because the CATV signal transmits the general relay-type (one-level connects one-level) that adopts and transmits; sometimes need transmit several kilometers; if charger can not recover after urgent protection outage automatically; the attendant must come and go several kilometers parents and go to field repair; this has just increased maintenance workload; influence the signal transmission, thereby be difficult to guarantee the smooth rating of TV programme.
The purpose of this utility model is to overcome above-mentioned weak point and a kind of CATV is provided multi-functional charger, and it not only has short circuit, overcurrent, over-voltage protecting function, and has automatic time delay and auto restore facility; It has the element of use few (lacking three to five times than general existing CATV charger) simultaneously, and control circuit is simplified greatly, thereby the whole aircraft reliability height, good stability.
The purpose of this utility model is achieved through the following technical solutions: the multi-functional charger of a kind of CATV, comprise transformer, be arranged on electromagnetic switch on this transformer and the 220V civil power loop, realize the control circuit of this electromagnetic switch folding by the AC signal of taking out from the CATV amplifier, this control circuit is by triode T
1, T
2, diode D
1, D
2, potentiometer R
w, resistance R
2, R
3, electrochemical capacitor C
3, relay J and working power form; Its element connecting relation is as follows: positive-negative-positive triode T
2Emitter series connection R
2After be connected to the working power positive pole, an end and the D of J
1Negative pole all and T
2Collector electrode connect the other end of J and D
1Positive pole be connected to working power negative pole, T
2Base stage be connected to NPN type triode T
1Collector electrode, T
1Base stage connect R
3An end, R
3The other end and D
2Negative pole and C
3Positive pole be coupled to each other D
2Positive pole be connected to R
wSlip joint, R
wAn end and C
3Negative pole and T
1Emitter all be connected to the working power negative pole; The aforementioned electromagnetic switch is the normally-closed contact J of J
1
On the technique scheme basis, cascade one frequency changer circuit again behind the secondary coil of transformer B, it is by inductance L
1, L
2, capacitor C
1, C
2, resistance R
1, LED forms, its element connecting relation is as follows: L
1, L
2An end that is terminated at the secondary coil of transformer B, L
2The other end R that connects successively
1, LED, C
2, C
1After be connected to L
1The other end, the other end of the secondary coil of transformer B is connected to LED and C
2Between; At L
1And C
1Between and C
1And C
2Between also be respectively arranged with a radio-frequency (RF) output end M and rf inputs head N.
After adopting above technical scheme, control circuit of the present utility model only is made up of 9 electronic components, and circuit is simple, thereby complete machine stability is good, reliability is high; This control circuit has short circuit, over-current over-voltage protection function; have automatic time delay and auto restore facility simultaneously; and; owing to set up frequency changer circuit, thereby can directly radiofrequency signal be imported the CATV amplifier and from the CATV amplifier, export through rf inputs head N, a radio-frequency (RF) output end M with the broadening signal frequency.
Fig. 1 is the utility model electricity functional-block diagram;
Fig. 2 is the circuit diagram of an embodiment of the utility model;
Fig. 3 is a machine shape schematic diagram of the present utility model.
Below in conjunction with accompanying drawing the utility model is elaborated.
Among Fig. 1,220V, 50Hz alternating current are through electromagnetic switch J
1Send transformer B to, after the step-down, again through being provided with the frequency changer circuit 1 of rf inputs head N, a radio-frequency (RF) output end M, with signal of telecommunication broadening frequency, deliver to the CATV amplifier then and use, working power is that 12 volts control circuit 2 takes out AC signal and realizes electromagnetic switch J from the CATV amplifier
1The control of folding.
Among Fig. 2,220V, 50Hz alternating current are through the normally-closed contact J of relay J
1Enter the primary coil of transformer B, transformer B output voltage is the alternating current of 60V (6A), can directly supply with the CATV amplifier and use; For the input and output termination of radiofrequency signal is set, behind the secondary coil of transformer B cascade frequency changer circuit 1, wherein a L
1Be 80 μ H, L
2Be 60 μ H, the signal of telecommunication by transformer B secondary coil is through frequency changer circuit 1 broadening frequency, and its frequency range is 5～1000MHz.M and N all can be used as the power supply output among Fig. 2.In the present embodiment, M is as the power supply output, and therefore, M also is the radio-frequency (RF) output end head, and correspondingly, N promptly is the rf inputs head.If as the power supply output, then N is the radio-frequency (RF) output end head with N, relatively, M is also just as the rf inputs head.LED is set indicates as working signal.In the control circuit 2, by resistance R
3, electrochemical capacitor C
3, diode D
2Form delayed recovery circuit, work as R
3Be 50K Ω, C
3When being 220 μ f, automatic time delay recovery time is 24 seconds.Change C
3And R
3Value can set up on their own from transporting the delay recovery time.When the circuit operate as normal, the normally-closed contact J of relay J
1Be in the close position the triode T in the control circuit 2
1, T
2Be in cut-off state.When breaking down as overvoltage, overcurrent or load short circuits situation in the circuit, the AC signal of being come by the CATV amplifier makes triode T
1Conducting (T
1Be switch triode), follow triode T
2Conducting is also carried out power amplification, promotes the relay J action, makes the normally-closed contact J of J
1Disconnect, interrupted power supply, thereby realize urgent protection short circuit, overcurrent-overvoltage to transformer B primary coil.After the foregoing circuit fault is eliminated, along with electrochemical capacitor C
3Discharge, that is to say at the automatic time delay of setting after 24 seconds triode T
1, T
2Recover cut-off state again, relay J resets, its normally-closed contact J
1The closure that thereupon resets, entire circuit has been recovered power supply again.Among Fig. 2, potentiometer R
w, capacitor C
1, C
2, resistance R
1, R
2, R
3, diode D
1, D
2, the working power of control circuit 2 is direct current 12V, it is to obtain after the processing such as step-down, rectification through the 220V50Hz alternating current is carried out.
Fig. 3 illustrates, and the utility model complete machine panel is provided with work indication (being the LED among Fig. 2), radio frequency input socket and radio frequency output socket (promptly exchanging the AC output socket).One discharge diode can be installed to avoid thunderbolt on this machine.
Claims (2)
1. multi-functional charger of CATV, comprise transformer, be arranged on electromagnetic switch on this transformer and the 220V civil power loop, realize the control circuit of this electromagnetic switch folding by the AC signal of from the CATV amplifier, taking out, it is characterized in that described control circuit (2) is by triode T
1, T
2, diode D
1, D
2, potentiometer R
w, resistance R
2, R
3, electrochemical capacitor C
3, relay J and working power form; Its element connecting relation is: positive-negative-positive triode T
2Emitter series resistance R
2After be connected to the working power positive pole, an end of relay J and diode D
1Negative pole all and T
2Collector electrode connect the other end of J and D
1Positive pole be connected to working power negative pole, T
2Base stage be connected to NPN type triode T
1Collector electrode, T
1Base stage connection electrical resistance R
3An end, R
wThe other end and diode D
2Negative pole and electrochemical capacitor C
3Positive pole be coupled to each other D
2Positive pole be connected to potentiometer R
wSlip joint, R
wAn end and C
3Negative pole and T
1Emitter all be connected to the working power negative pole; Described electromagnetic switch is the normally-closed contact J of relay J
1
2. charger according to claim 1 is characterized in that, level is associated with a frequency changer circuit (1) behind the secondary coil of described transformer B, and this frequency changer circuit (1) is by inductance L
1, L
2, capacitor C
1, C
2, resistance R
1, LED forms, its element connecting relation is: L
1, L
2An end that is terminated at the secondary coil of transformer B, L
2The other end R that connects successively
1, LED, C
2, C
1After be connected to L
1The other end, the other end of the secondary coil of transformer B is connected to LED and C
2Between; Be provided with a radio-frequency (RF) output end M and rf inputs head N in this frequency changer circuit (1), they are separately positioned on L
1And C
1Between and C
1And C
2Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233722 CN2270302Y (en) | 1996-09-11 | 1996-09-11 | CATV multifunctional power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233722 CN2270302Y (en) | 1996-09-11 | 1996-09-11 | CATV multifunctional power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2270302Y true CN2270302Y (en) | 1997-12-10 |
Family
ID=33910331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96233722 Expired - Fee Related CN2270302Y (en) | 1996-09-11 | 1996-09-11 | CATV multifunctional power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2270302Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674430B (en) * | 2009-09-24 | 2012-12-19 | 江苏西贝电子网络有限公司 | Cable-television radio-frequency amplifier compatible with 60V and 220V power supplies |
-
1996
- 1996-09-11 CN CN 96233722 patent/CN2270302Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674430B (en) * | 2009-09-24 | 2012-12-19 | 江苏西贝电子网络有限公司 | Cable-television radio-frequency amplifier compatible with 60V and 220V power supplies |
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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 |