CN203911471U - Communication base station controller with overvoltage protection - Google Patents
Communication base station controller with overvoltage protection Download PDFInfo
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- CN203911471U CN203911471U CN201420309964.XU CN201420309964U CN203911471U CN 203911471 U CN203911471 U CN 203911471U CN 201420309964 U CN201420309964 U CN 201420309964U CN 203911471 U CN203911471 U CN 203911471U
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Abstract
The utility model discloses a communication base station controller with overvoltage protection. The controller comprises a power port, the power port is connected with a filtering and shaping circuit, the filtering and shaping circuit is connected with an overvoltage protection circuit, the overvoltage protection circuit is connected with a controller, one end of a capacitor C1 of the overvoltage protection circuit is simultaneously connected with the cathode of a diode D1 and the cathode of a diode D2 via a resistor R3, the other end of the capacitor C1 is connected with the anode of the diode D2, the capacitor C1 is connected with a divider resistor in parallel, the divider resistor comprises a resistor R1 and a resistor R2, the common end of the resistor R1 and the resistor R2 is connected with the in-phase input end of the an operational amplifier, the anti-phase input end of the operational amplifier is connected with a power supply, the output end of the operational amplifier is connected with the grid electrode of a field effect transistor, the drain electrode of the field effect transistor is connected with the anode of the diode D2, the source electrode of the field effect transistor is connected with the anode of the diode D1, and the diode D2 is connected with a relay in parallel. The communication base station has the advantages that the controller is protected against overvoltage, and is prevented from damage caused by overvoltage.
Description
Technical field
The utility model relates to a kind of communication base station controller, relates in particular a kind of communication base station controller with overvoltage protection.
Background technology
Under the background developing rapidly in mechanics of communication, the number of users rapid growth of global mobile communication network, simultaneously, along with the increasing of the number of users of mobile communication, the quantity of mobile communication base station controller also increases thereupon.Communication base station controller is as the visual plant of communication base station, and safety is very important evaluation index.Communication base station controller divides in order to make continual, the operation reliably for a long time of mobile base station transceiver at power suppling part, and it adopts duplicate supply supply mode.The area relatively lacking at electric power, supply power voltage is very unstable, peak times of power consumption voltage inadequate, voltage can exceed again 220V at dead of night, even exceedes 240V.A lot of modules in communication base station controller all need power supply, and it directly adopts ac power supply, and at dead of night, overtension can impact the module in controller, and its performance is affected.
Utility model content
The utility model provides a kind of communication base station controller with overvoltage protection, and it connects successively filtering shaping circuit and filtering shaping circuit on controller, and controller is carried out to overvoltage protection, avoids overtension to damage controller.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
There is the communication base station controller of overvoltage protection, it comprises controller and power port, described power port is connected on the input of filtering shaping circuit, on the output of described filtering shaping circuit, be connected with overvoltage crowbar, described overvoltage crowbar is connected on controller, described overvoltage crowbar comprises capacitor C 1, one end of described capacitor C 1 is connected with the negative electrode of diode D2 with the negative electrode of diode D1 by resistance R 3 simultaneously, the other end is connected on the anode of diode D2, in described capacitor C 1, be parallel with divider resistance, described divider resistance comprises resistance R 1 and resistance R 2, described resistance R 1 and the common port of resistance R 2 are connected on the in-phase input end of operational amplifier, the inverting input of described operational amplifier is connected on power supply, the output of described operational amplifier is connected with the grid of field effect transistor, the drain electrode of described field effect transistor is connected to by resistance R 4 on the anode of diode D2, the source electrode of described field effect transistor is connected on the anode of diode D1, described diode D1 two ends are parallel with relay K, described field effect transistor is N-type field effect transistor, described diode D2 is voltage stabilizing didoe.
Further technical scheme is:
As preferably, on described diode D2, be parallel with capacitor C 2.
Further, the inverting input of described operational amplifier is connected on 2.5V power supply.
Further, the ratio of described resistance R 1 and resistance R 2 is 9:1.
Compared with prior art, the beneficial effects of the utility model are:
The utility model connects overvoltage crowbar on controller, in the time that line voltage is excessive, by city's electrical short, controller is protected.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the circuit diagram of overvoltage crowbar of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
[embodiment]
The communication base station controller with overvoltage protection as shown in Figure 1, it comprises controller and power port, described power port is connected on the input of filtering shaping circuit, on the output of described filtering shaping circuit, be connected with overvoltage crowbar, described overvoltage crowbar is connected on controller, described overvoltage crowbar comprises capacitor C 1, one end of described capacitor C 1 is connected with the negative electrode of diode D2 with the negative electrode of diode D1 by resistance R 3 simultaneously, the other end is connected on the anode of diode D2, in described capacitor C 1, be parallel with divider resistance, described divider resistance comprises resistance R 1 and resistance R 2, described resistance R 1 and the common port of resistance R 2 are connected on the in-phase input end of operational amplifier, the inverting input of described operational amplifier is connected on power supply, the output of described operational amplifier is connected with the grid of field effect transistor, the drain electrode of described field effect transistor is connected to by resistance R 4 on the anode of diode D2, the source electrode of described field effect transistor is connected on the anode of diode D1, described diode D1 two ends are parallel with relay K, described field effect transistor is N-type field effect transistor, described diode D2 is voltage stabilizing didoe.In the utility model, the two ends of capacitor C 1 are connected on the output of filtering shaping circuit, and filtering shaping circuit can adopt the form of bridge rectifier or other circuit.Power port is connected in the AC power of 220V.In the time that the voltage of power port is normal, the voltage after filter shape makes the magnitude of voltage of the voltage less-than operation amplifier inverting input of resistance R 1 and resistance R 2 common ports through the dividing potential drop of divider resistance, and not conducting of field effect transistor, makes the contact of relay not closed.In the time that the voltage of power port exceedes 220V, the voltage after filter shape produces respectively pressure drop on resistance R 3, diode D2.Now, be greater than the magnitude of voltage of operational amplifier inverting input at the voltage of resistance R 1 and resistance R 2 common ports, field effect transistor conducting, relay adhesive, makes city's electrical short, and controller is protected, and now its redundant power is started working.The circuit structure of whole overvoltage crowbar is simple, adopts the highly sensitive of its conducting of field effect transistor, can improve control precision.
In order to make relay have long pickup time, on described diode D2, be parallel with capacitor C 2.In capacitor C 2, store a large amount of electric charges, in the time of city's electrical short, the electric charge in capacitor C 3 is added on relay, and increased the pickup time of relay, makes fuse have enough time to be fused.
The inverting input of described operational amplifier is connected on 2.5V power supply, and described resistance R 1 and the ratio of resistance R 2 are 9:1.2.5V power supply provides the reference voltage of operational amplifier, make control precision improve, and the ratio of resistance R 1 and resistance R 2 is 9:1.
In the present embodiment, disclose one group of preferred embodiment, resistance R 1, resistance R 2, resistance R 3, resistance R 4 can adopt respectively 9 kilohms, 1 kilohm, 1 kilohm, 3.9 kilohms; Capacitor C 1 and capacitor C 2 adopt the electric capacity of 10 μ F respectively; Diode D1 and diode D2 can adopt LN5395, RL103 model; Relay can adopt LY115 model; Operational amplifier CA1310 model; Field effect transistor adopts N-type field effect transistor 3803L.Through emulation, adopt the electronic device of above-mentioned model specification, can make the performance of circuit more excellent.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection range of the present utility model.
Claims (4)
1. there is the communication base station controller of overvoltage protection, it comprises controller and power port, it is characterized in that: described power port is connected on the input of filtering shaping circuit, on the output of described filtering shaping circuit, be connected with overvoltage crowbar, described overvoltage crowbar is connected on controller, described overvoltage crowbar comprises capacitor C 1, one end of described capacitor C 1 is connected with the negative electrode of diode D2 with the negative electrode of diode D1 by resistance R 3 simultaneously, the other end is connected on the anode of diode D2, in described capacitor C 1, be parallel with divider resistance, described divider resistance comprises resistance R 1 and resistance R 2, described resistance R 1 and the common port of resistance R 2 are connected on the in-phase input end of operational amplifier, the inverting input of described operational amplifier is connected on power supply, the output of described operational amplifier is connected with the grid of field effect transistor, the drain electrode of described field effect transistor is connected to by resistance R 4 on the anode of diode D2, the source electrode of described field effect transistor is connected on the anode of diode D1, described diode D1 two ends are parallel with relay K, described field effect transistor is N-type field effect transistor, described diode D2 is voltage stabilizing didoe.
2. the communication base station controller with overvoltage protection according to claim 1, is characterized in that: on described diode D2, be parallel with capacitor C 2.
3. the communication base station controller with overvoltage protection according to claim 1 and 2, is characterized in that: the inverting input of described operational amplifier is connected on 2.5V power supply.
4. the communication base station controller with overvoltage protection according to claim 3, is characterized in that: described resistance R 1 and the ratio of resistance R 2 are 9:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309964.XU CN203911471U (en) | 2014-06-12 | 2014-06-12 | Communication base station controller with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309964.XU CN203911471U (en) | 2014-06-12 | 2014-06-12 | Communication base station controller with overvoltage protection |
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| Publication Number | Publication Date |
|---|---|
| CN203911471U true CN203911471U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420309964.XU Expired - Fee Related CN203911471U (en) | 2014-06-12 | 2014-06-12 | Communication base station controller with overvoltage protection |
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| Country | Link |
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| CN (1) | CN203911471U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052047A (en) * | 2014-06-12 | 2014-09-17 | 四川联友电讯技术有限公司 | Communication base station controller with overvoltage protection function |
| CN112230031A (en) * | 2019-12-20 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Overvoltage protection circuit design for three-phase meter |
-
2014
- 2014-06-12 CN CN201420309964.XU patent/CN203911471U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052047A (en) * | 2014-06-12 | 2014-09-17 | 四川联友电讯技术有限公司 | Communication base station controller with overvoltage protection function |
| CN112230031A (en) * | 2019-12-20 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Overvoltage protection circuit design for three-phase meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20141029 Termination date: 20190612 |
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| CF01 | Termination of patent right due to non-payment of annual fee |