CN203466728U - Intrinsically safe switching power supply DC intrinsically safe power supply - Google Patents
Intrinsically safe switching power supply DC intrinsically safe power supply Download PDFInfo
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- CN203466728U CN203466728U CN201320584314.1U CN201320584314U CN203466728U CN 203466728 U CN203466728 U CN 203466728U CN 201320584314 U CN201320584314 U CN 201320584314U CN 203466728 U CN203466728 U CN 203466728U
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Abstract
The utility model discloses an intrinsically safe switching power supply DC intrinsically safe power supply which comprises a pre-stage switching power supply circuit and a back-stage voltage and current limiting circuit. The pre-stage switching power supply circuit comprises an input rectifier voltage stabilizing module, a switching power supply output control module, a high frequency transformer, an output voltage sampling module, and an output current sampling module. After output voltage sampling module and output current sampling module collection signals are isolated, the signals are fed back to the switching power supply output control module, the energy input of the high frequency transformer is controlled, and primary precise voltage stabilizing and current limiting are realized. The back-stage voltage and current limiting circuit comprises an output voltage sampling module, an output current sampling module, an OR operation module and two output control modules. Through the OR operation module, when the output voltage sampling module and the output current sampling module collect the overlimit of any parameter, two output control modules cut off power supply output. According to the intrinsically safe switching power supply DC intrinsically safe power supply, the burden of the backstage circuit can be reduced, and the pre-stage failure and output overlimit in energy storage and discharge are avoided.
Description
Technical field
The utility model relates to a kind of intrinsic safety electric source, specifically a kind of intrinsic safety type switch power supply type direct current intrinsic safety electric source.
Background technology
At present, the application of intrinsic safety electric source in mine electrical appliance equipment is very extensive, has dividing of AC and DC intrinsic safety electric source, wherein, exchange realizing of intrinsic safety electric source more convenient, but its voltage stabilizing is poor, field of employment is limited, therefore has the trend being replaced by direct current intrinsic safety electric source.Intrinsic safety electric source mainly contains two large characteristics, the one, the isolation of non-intrinsic safety input and intrinsic safety output, the 2nd, the strict restriction to power output, existing direct current intrinsic safety electric source is generally AC power input, by small-sized isolating transformer, realize the restriction of power output and the isolation of input and output, and carry out preliminary step-down, after rectification, process pressure-limit current-limit is processed again, thereby meets the requirement of intrinsic safety electric source.But in actual use, there are the following problems: the effect of the small-sized isolating transformer of prime is limited, and voltage stabilizing, current limliting, pressure limiting are mainly completed by rear class pressure-limit current-limit circuit, and over-burden, the lower problem of power supply conversion delivery efficiency to cause late-class circuit; The general load capacity of this intrinsic safety electric source is lower, and the precision of Voltage-output is not high.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of intrinsic safety type switch power supply type direct current intrinsic safety electric source, its prime effect can be brought into play, reduces the burden of late-class circuit, and the situation that while avoiding prime inefficacy and energy storage electric discharge, output is transfinited occurs; Improve the precision of load capacity and Voltage-output.
To achieve these goals, a kind of intrinsic safety type switch power supply type of the utility model direct current intrinsic safety electric source, comprises prime switching power circuit and rear class pressure-limit current-limit circuit,
Described prime switching power circuit comprises input rectifying Voltage stabilizing module, Switching Power Supply output control module, high frequency transformer, output voltage sampling module I and output current sampling module I, and input rectifying Voltage stabilizing module is connected with the input of Switching Power Supply output control module; The output of Switching Power Supply output control module is connected with the input of high frequency transformer; The output of high frequency transformer is connected with Voltage stabilizing module; Output voltage sampling module I is connected in parallel on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module I; Output current sampling module I is connected on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module II;
Described rear class pressure-limit current-limit circuit comprises output voltage sampling module II, output current sampling module II, exclusive disjunction module and two output control modules, and the output of output voltage sampling module II and output current sampling module II is all connected with the input of exclusive disjunction module; The output of exclusive disjunction module is connected with two output control modules respectively;
Described output voltage sampling module II is connected in parallel on the output of high frequency transformer; Output current sampling module II is connected on the output of high frequency transformer; High frequency transformer is connected with two output control modules with output current sampling module II by output current sampling module I respectively.
Preferably, described Switching Power Supply output control module is single-chip microcomputer.
Further, also comprise the alarm being connected with output control module.
Compared with prior art, the utility model carries out the accurate voltage stabilizing of one-level and current limliting by prime switching power circuit to output voltage and electric current, and input and output are isolated, recycling rear class pressure-limit current-limit circuit carries out secondary pressure-limit current-limit as redundancy protecting, preceding stage circuit is main, reduce the burden of late-class circuit, avoided the situation that prime lost efficacy to occur; Simultaneously, utilize each output voltage sampling module and output current sampling module to detect the voltage and current of high frequency transformer output, by exclusive disjunction module and two output control modules, control the output of power supply, the output of can simultaneously cutting off the electricity supply when voltage or electric current transfinite, while avoiding occurring energy storage electric discharge, export situation about transfiniting, improved the precision of load capacity and Voltage-output simultaneously.
Accompanying drawing explanation
Fig. 1 is electric theory diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, this intrinsic safety type switch power supply type direct current intrinsic safety electric source, comprise prime switching power circuit and rear class pressure-limit current-limit circuit, described prime switching power circuit comprises input rectifying Voltage stabilizing module, Switching Power Supply output control module, high frequency transformer, output voltage sampling module I and output current sampling module I, and input rectifying Voltage stabilizing module is connected with the input of Switching Power Supply output control module; The output of Switching Power Supply output control module is connected with the input of high frequency transformer; The output of high frequency transformer is connected with Voltage stabilizing module; Output voltage sampling module I is connected in parallel on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module I; Output current sampling module I is connected on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module II; Described rear class pressure-limit current-limit circuit comprises output voltage sampling module II, output current sampling module II, exclusive disjunction module and two output control modules, and the output of output voltage sampling module II and output current sampling module II is all connected with the input of exclusive disjunction module; The output of exclusive disjunction module is connected with two output control modules respectively; Described output voltage sampling module II is connected in parallel on the output of high frequency transformer; Output current sampling module II is connected on the output of high frequency transformer; High frequency transformer is connected with two output control modules with output current sampling module II by output current sampling module I respectively.
During work, the non-intrinsic safety electric source input signal that input rectifying Voltage stabilizing module sends input is processed, and sending the signal after processing to Switching Power Supply output control module, Switching Power Supply output control module sends high frequency transformer to after it is further processed.Output voltage sampling module I and output current sampling module I are for detection of the voltage and current of high frequency transformer output, and the voltage and current signal collecting is passed through after isolation, feed back to Switching Power Supply output control module, control the input of high frequency transformer energy, realize the accurate voltage stabilizing of one-level and current limliting; Wherein, Switching Power Supply output control module while receiving the signal that output voltage sampling module I and output current sampling module I feedback come, be also or relation, when output voltage and current feedback signal, when any one occurs transfiniting, Switching Power Supply output control module all can the output of rapid adjustment power supply.Simultaneously, output voltage sampling module II in rear class pressure-limit current-limit circuit and output current sampling module II are also for detection of the voltage and current of high frequency transformer output, and send the voltage and current signal collecting to exclusive disjunction module, for the output of controlling power supply whether, when wherein any one parameter transfinites, all can make the output of cutting off the electricity supply of two output control modules.In addition, Switching Power Supply output control module can also gather the operation feedback signal of high frequency transformer, the output of cutting off the electricity supply when there are abnormal conditions.Finally; by prime switching power circuit, output voltage and electric current are carried out to the accurate voltage stabilizing of one-level and current limliting; and input and output are isolated; recycling rear class pressure-limit current-limit circuit carries out secondary pressure-limit current-limit as redundancy protecting; preceding stage circuit is main; reduced the burden of late-class circuit, the situation that while avoiding prime inefficacy and energy storage electric discharge, output is transfinited occurs.
Wherein, output voltage sampling module I and output voltage sampling module II can adopt voltage sensor, and output current sampling module I and output current sampling module II can adopt current sensor, and it is more accurate to detect, and operability is stronger.
Preferably, described Switching Power Supply output control module is single-chip microcomputer, and the technology maturation of single-chip microcomputer is convenient to debugging and safeguards, is easy to realize the purpose of this utility model.
Further, also comprise the alarm being connected with output control module, when the output voltage of high frequency transformer or any one parameter of electric current transfinite, the output of all cutting off the electricity supply of two output control modules, control alarm simultaneously and send warning, inform user's concrete condition, facilitate user to take other related measures.
Claims (3)
1. an intrinsic safety type switch power supply type direct current intrinsic safety electric source, is characterized in that, comprises prime switching power circuit and rear class pressure-limit current-limit circuit,
Described prime switching power circuit comprises input rectifying Voltage stabilizing module, Switching Power Supply output control module, high frequency transformer, output voltage sampling module I and output current sampling module I, and input rectifying Voltage stabilizing module is connected with the input of Switching Power Supply output control module; The output of Switching Power Supply output control module is connected with the input of high frequency transformer; The output of high frequency transformer is connected with Voltage stabilizing module; Output voltage sampling module I is connected in parallel on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module I; Output current sampling module I is connected on the output of high frequency transformer, and is connected with the output feedback end of Switching Power Supply output control module by isolation module II;
Described rear class pressure-limit current-limit circuit comprises output voltage sampling module II, output current sampling module II, exclusive disjunction module and two output control modules, and the output of output voltage sampling module II and output current sampling module II is all connected with the input of exclusive disjunction module; The output of exclusive disjunction module is connected with two output control modules respectively;
Described output voltage sampling module II is connected in parallel on the output of high frequency transformer; Output current sampling module II is connected on the output of high frequency transformer; High frequency transformer is connected with two output control modules with output current sampling module II by output current sampling module I respectively.
2. a kind of intrinsic safety type switch power supply type direct current intrinsic safety electric source according to claim 1, is characterized in that, described Switching Power Supply output control module is single-chip microcomputer.
3. a kind of intrinsic safety type switch power supply type direct current intrinsic safety electric source according to claim 1 and 2, is characterized in that, also comprises the alarm being connected with output control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320584314.1U CN203466728U (en) | 2013-09-22 | 2013-09-22 | Intrinsically safe switching power supply DC intrinsically safe power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320584314.1U CN203466728U (en) | 2013-09-22 | 2013-09-22 | Intrinsically safe switching power supply DC intrinsically safe power supply |
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| CN203466728U true CN203466728U (en) | 2014-03-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011536A (en) * | 2017-12-27 | 2018-05-08 | 中煤科工集团重庆研究院有限公司 | Lift the pressure limiting circuit system of the Mine Switch power supply of input voltage range |
| CN108111001A (en) * | 2017-12-27 | 2018-06-01 | 恒安科技（中山）有限公司 | A kind of intrinsically safe power supply |
-
2013
- 2013-09-22 CN CN201320584314.1U patent/CN203466728U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011536A (en) * | 2017-12-27 | 2018-05-08 | 中煤科工集团重庆研究院有限公司 | Lift the pressure limiting circuit system of the Mine Switch power supply of input voltage range |
| CN108111001A (en) * | 2017-12-27 | 2018-06-01 | 恒安科技（中山）有限公司 | A kind of intrinsically safe power supply |
| CN108011536B (en) * | 2017-12-27 | 2019-11-22 | 中煤科工集团重庆研究院有限公司 | Promote the pressure limiting circuit system of the Mine Switch power supply of input voltage range |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20150922 |
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| EXPY | Termination of patent right or utility model |