CN215379023U - Switch power panel - Google Patents

Abstract

The utility model discloses a power panel of a switch, which comprises: an input module; the first rectification filtering module is electrically connected with the input module; the transformer module is electrically connected with the first rectifying and filtering module; the output module is electrically connected with the transformer module; the switch module is electrically connected with the transformer module; the sampling feedback module is electrically connected to the output module; the control module is electrically connected with the sampling feedback module and the switch module; the backup power supply module can be charged by the output module in a normal state or can supply power to the output module under the condition that the input module is powered off; the utility model provides a switch power strip for in the switch, can provide power source for the switch, possess conversion efficiency height, the loss is little, output voltage precision is high, the characteristics that ripple rate is little, be equipped with backup power module simultaneously, no power supply leads to the conversation to be interrupted when can avoiding the unexpected outage of switch to close, provides technical guarantee for the conversation is stable.

Description

Switch power panel

Technical Field

The utility model belongs to the technical field of power supplies, and particularly relates to a power supply board of a switch.

Background

The SPC exchanges are called stored program control exchanges (corresponding to the stored program control exchanges, called distribution control exchanges for short), also called SPC digital exchanges or digital SPC exchanges. Generally, it is used exclusively for switching devices for telephone switching networks, which control the telephone connections with computer programs. The program controlled exchanger is a telephone exchanger which utilizes modern computer technology to complete control, connection and other works.

The switch needs to insert the power strip power supply, and prior art's power strip generally only supplies the switch with the voltage rectification after filtering and uses, and when the unexpected outage of access power, the switch also cuts off the power supply at once, leads to the conversation to break off.

Accordingly, the prior art is in need of improvement and development.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a power panel of a switch, which can avoid call interruption during power failure.

The embodiment of the application provides a switch power strip, include:

the input module is used for accessing an external power supply and providing power supply for a load;

the first rectification filtering module is electrically connected with the input module and used for rectifying and filtering the accessed external power supply into a stable power supply;

the transformer module is electrically connected with the first rectifying and filtering module and used for reducing the voltage of the power supply and providing the power supply for a load;

the output module is electrically connected with the transformer module and used for receiving the reduced power supply and outputting a preset voltage power supply to a load;

the switch module is electrically connected to the transformer module and used for controlling the switch of the transformer module;

the sampling feedback module is electrically connected to the output module and used for collecting the output voltage of the output module and processing the output voltage into feedback information;

the control module is electrically connected with the sampling feedback module and the switch module and used for receiving feedback information of the sampling feedback module and controlling the switch module to carry out transformer switch operation according to the feedback information;

the backup power module is provided with an input end and an output end which are electrically connected with the output module, and can be charged by the output module in a normal state or supply power to the output module under the condition that the input module is powered off.

The switch power panel, wherein the input module comprises an EMI filtering module connected with an external power supply and an overvoltage protection module connected with the EMI filtering module.

The switch power panel, wherein, overvoltage protection module includes:

the overvoltage detection module is electrically connected to the EMI filtering module and used for detecting input voltage;

the voltage limiting module is electrically connected to the overvoltage detection module and used for presetting a voltage reference value and judging whether the input voltage exceeds the voltage reference value;

and the overvoltage control module is electrically connected to the overvoltage protection module and used for controlling the load to disconnect the power supply when the input voltage exceeds the voltage reference value.

The switch power panel, wherein the control module comprises a PWM control management IC of type OB2269 CP.

The switch power panel, wherein, still include the isolation module, the isolation module is located control module with between the sampling feedback module, can with the cooperation of transformer module is divided into high-voltage region and low-voltage region with the power panel.

The switch power panel further comprises a second rectifying and filtering module, wherein the second rectifying and filtering module is arranged between the transformer module and the output module and is used for performing secondary voltage stabilization treatment on the power supply after voltage reduction.

The power panel of the switch comprises an output module and a control module, wherein the output module comprises a-5V direct current output end, a 28V direct current output end, a 35V direct current output end and a 75V +/-15V alternating current output end.

The power panel of the switch is characterized in that the transformer module comprises a high-frequency transformer with the model number of PQ 3230.

By last, the switch power strip of this application embodiment for in the switch, can provide power source for the switch, the power strip of this application embodiment adopts sampling feedback module cooperation control module to carry out the start-up of transformer module and closes control, has constituted flyback transformer switch circuit, possesses conversion efficiency height, the loss is little, the output voltage precision is high, characteristics that the ripple rate is little, be equipped with backup power module simultaneously, can avoid the switch unexpected outage to close the time no power supply leads to the conversation to be interrupted, stably provide technical guarantee for the conversation.

Drawings

Fig. 1 is a schematic structural diagram of a power supply board of a switch according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an overvoltage protection module.

Description of reference numerals: 1. an input module; 2. a first rectifying and filtering module; 3. a transformer module; 4. an output module; 5. a switch module; 6. a sampling feedback module; 7. a control module; 8. a backup power module; 9. an isolation module; 10. a second rectifying and filtering module; 11. an EMI filtering module; 12. an overvoltage protection module; 121. an overvoltage detection module; 122. a voltage limiting module; 123. and an overvoltage control module.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

As shown in fig. 1-2, the present invention provides a power strip for a switch, comprising:

the input module 1 is used for accessing an external power supply and providing power supply for a load;

the first rectification filter module 2 is electrically connected to the input module 1 and used for rectifying and filtering the accessed external power supply into a stable power supply;

the transformer module 3 is electrically connected to the first rectifying and filtering module 2 and used for reducing the voltage of the power supply and providing the power supply for a load;

the output module 4 is electrically connected to the transformer module 3 and used for receiving the reduced voltage power supply and outputting a preset voltage power supply to a load;

the switch module 5 is electrically connected to the transformer module 3 and used for controlling the switch of the transformer module 3;

the sampling feedback module 6 is electrically connected to the output module 4 and used for collecting the output voltage of the output module 4 and processing the output voltage into feedback information;

the control module 7 is electrically connected to the sampling feedback module 6 and the switch module 5, and is used for receiving the feedback information of the sampling feedback module 6 and controlling the switch module 5 to perform transformer switching operation according to the feedback information;

and the backup power supply module 8 is provided with an input end and an output end which are electrically connected with the output module 4, and can be charged by the output module 4 in a normal state or supply power to the output module 4 under the condition that the input module 1 is powered off.

The switch power panel of the embodiment of the application is used in a switch and can provide a power interface for the switch, the power panel of the embodiment of the application adopts the sampling feedback module 6 to be matched with the control module 7 to control the starting and closing of the transformer module 3, a flyback transformer switch circuit is formed, mains supply provides power output for a load through the flyback transformer switch circuit, matched machines which can be well matched can run, power supply is provided for full-load work of functions such as telephone conversation and ringing, and the switch power panel has the advantages of being high in conversion efficiency, small in loss, high in output voltage precision and small in ripple rate.

In addition, the switch power strip of this application embodiment is equipped with reserve power module 8, can avoid the switch unexpected outage to close the time no power supply leads to the conversation to be interrupted, provides technical guarantee for the conversation is stable.

In some preferred embodiments, the input module 1 includes an EMI filter module 11 connected to an external power supply, an overvoltage protection module 12 connected to the EMI filter module 11; the EMI filtering module 11 is arranged to filter the interference of high-frequency pulses of an external power grid to a power supply and reduce the electromagnetic interference of the switching power supply to the outside; in fact, the characteristics of an inductor and a capacitor are utilized, so that alternating current with the frequency of about 50Hz can smoothly pass through the filter, but high-frequency interference noise waves higher than 50Hz are filtered by the filter; the overvoltage protection module 12 is arranged to monitor the access voltage in real time and protect the circuit, so that the power panel equipment is prevented from being damaged by high-voltage pulse breakdown caused by lightning stroke or lightning induction or other voltage fluctuation, and the power panel provided by the embodiment of the application is suitable for being used in areas with unstable voltage.

In some preferred embodiments, the overvoltage protection module 12 includes:

the overvoltage detection module 121 is electrically connected to the EMI filter module 11, and is configured to detect an input voltage;

a voltage limiting module 122 electrically connected to the overvoltage detection module 121, configured to preset a voltage reference value and determine whether the input voltage exceeds the voltage reference value;

the overvoltage control module 123 is electrically connected to the overvoltage protection module 12, and is configured to control the load to disconnect the power supply when the input voltage exceeds the voltage reference value; the power panel of this application embodiment realizes the real-time supervision of access voltage through setting up overvoltage protection module 12 that overvoltage detection module 121, voltage limit module 122, overvoltage control module 123 are constituteed, but the power supply is cut off when access voltage surpasss predetermined voltage reference value, avoids the too high load product that damages power and access of voltage to effectively improve product safety in utilization.

In addition, when the overvoltage protection module 12 cuts off the access power supply, the backup power supply module 8 is started to supply power, so that the call interruption of the telephone can be avoided.

In some preferred embodiments, the control module 7 includes a PWM control management IC of type OB2269CP, and the OB2269CP can be designed as a highly integrated PWM control integrated circuit for AC/DC switch mode power supply application, and has features of low standby power consumption and high efficiency, which can enhance the performance of the power supply.

In some preferred embodiments, the power supply further comprises an isolation module 9, wherein the isolation module 9 is arranged between the control module 7 and the sampling feedback module 6, and can be matched with the transformer module 3 to divide the power supply board into a high-voltage area and a low-voltage area; isolation module 9 adopts the opto-coupler, photoelectric coupler promptly, and the opto-coupler structure is equivalent to being in the same place emitting diode and photosensitive (triode) encapsulation, and emitting diode converts the electrical signal of input into photosignal and passes to the photosensitive tube and convert electrical signal output, owing to there is not the first electrical connection who connects, and signal is gone into in the existing coupling transmission like this, has the effect of keeping apart futilely to divide the power strip into high nip and low-pressure area and carry out the subregion protection, improve the safety in utilization of power strip.

In some preferred embodiments, the power supply further comprises a second rectifying and filtering module 10, wherein the second rectifying and filtering module 10 is arranged between the transformer module 3 and the output module 4, and is used for performing secondary voltage stabilization on the stepped-down power supply; because the output voltage ripple after the transformer transformation is large, the second rectification filter module 10 is adopted to perform secondary filtering processing, so that stable output voltage is obtained.

In some preferred embodiments, the output module 4 includes-5V dc output, 28V dc output, 35V dc output, and 75V ± 15V ac output; the five groups of output voltages are set, so that the running of a matched machine can be well met, and the telephone can normally work under a full load.

In some preferred embodiments, the transformer module 3 comprises a high frequency transformer of the type PQ 3230; the PQ3230 high-frequency transformer has the characteristics of compact structure, high power, moderate price and high reliability. The magnetic core of the PQ-type high-frequency transformer is a ferrite magnetic core designed for adapting to the use requirements of a novel switching power supply, the shape of the magnetic core can meet the requirements of reducing copper loss and iron loss of the switching power supply transformer working under high frequency, the magnetic core can also adapt to the requirements of the switching power supply on temperature rise, the circular central column of the magnetic core enables the winding to be easier, the coil capacity to be increased, and the lead end of the framework enables the product to be installed very reliably; the embodiment of the application adopts the PQ3230 high-frequency transformer, so that the conversion efficiency can be effectively improved, and the problem of temperature rise of a power panel can be effectively reduced.

To sum up, the switch power strip of this application embodiment for in the switch, can provide power source for the switch, the power strip of this application embodiment adopts sampling feedback module 6 cooperation control module 7 to carry out the start-up of transformer module 3 and closes control, flyback transformer switch circuit has been constituted, it is high to possess conversion efficiency, the loss is little, the output voltage precision is high, characteristics that the ripple rate is little, be equipped with backup power module 8 simultaneously, no power supply leads to the conversation to be interrupted when can avoiding the unexpected outage of switch to close, provide technical guarantee for the conversation is stable.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims (8)

1. A switch power strip, comprising:

the input module (1) is used for accessing an external power supply and providing power supply for a load;

the first rectification filtering module (2) is electrically connected to the input module (1) and is used for rectifying and filtering the accessed external power supply into a stable power supply;

the transformer module (3) is electrically connected to the first rectifying and filtering module (2) and is used for reducing the voltage of a power supply and providing the power supply for a load;

the output module (4) is electrically connected to the transformer module (3) and used for receiving the reduced voltage power supply and outputting a preset voltage power supply to a load;

the switch module (5) is electrically connected to the transformer module (3) and is used for controlling the switch of the transformer module (3);

the sampling feedback module (6) is electrically connected to the output module (4) and is used for collecting the output voltage of the output module (4) and processing the output voltage into feedback information;

the control module (7) is electrically connected to the sampling feedback module (6) and the switch module (5) and is used for receiving feedback information of the sampling feedback module (6) and controlling the switch module (5) to carry out transformer switching operation according to the feedback information;

the backup power supply module (8) is provided with an input end and an output end which are electrically connected with the output module (4), and can be charged by the output module (4) in a normal state or supply power to the output module (4) under the condition that the input module (1) is powered off.

2. Switch power strip according to claim 1, characterized in that the input module (1) comprises an EMI filter module (11) connected to an external power supply, an overvoltage protection module (12) connected to the EMI filter module (11).

3. A switchboard power strip according to claim 2, characterized in that said overvoltage protection module (12) comprises:

the overvoltage detection module (121) is electrically connected to the EMI filtering module (11) and is used for detecting input voltage;

the voltage limiting module (122) is electrically connected to the overvoltage detection module (121) and is used for presetting a voltage reference value and judging whether the input voltage exceeds the voltage reference value;

and the overvoltage control module (123) is electrically connected to the overvoltage protection module (12) and is used for controlling the load to disconnect the power supply when the input voltage exceeds the voltage reference value.

4. The switch power strip according to claim 1, characterized in that the control module (7) comprises a PWM control management IC of type OB2269 CP.

5. The switch power strip according to claim 1, further comprising an isolation module (9), wherein the isolation module (9) is disposed between the control module (7) and the sampling feedback module (6) and is capable of cooperating with the transformer module (3) to divide the power strip into a high voltage region and a low voltage region.

6. The switch power panel according to claim 1, further comprising a second rectifying and filtering module (10), wherein the second rectifying and filtering module (10) is disposed between the transformer module (3) and the output module (4) and is configured to perform a secondary voltage stabilization process on the stepped-down power supply.

7. The switchboard power strip of claim 1, characterized in that said output modules (4) comprise-5V dc outputs, 28V dc outputs, 35V dc outputs, and 75V ± 15V ac outputs.

8. Switchboard power strip according to claim 1, characterized in that said transformer module (3) comprises a high-frequency transformer of the type PQ 3230.

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