CN205142040U - Power supply circuit isolated system - Google Patents
Power supply circuit isolated system Download PDFInfo
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- CN205142040U CN205142040U CN201520989430.0U CN201520989430U CN205142040U CN 205142040 U CN205142040 U CN 205142040U CN 201520989430 U CN201520989430 U CN 201520989430U CN 205142040 U CN205142040 U CN 205142040U
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- power supply
- filter
- frequency transformer
- rectifier
- shielding system
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Abstract
The utility model provides power supply circuit isolated system, the direct current of outside DC power supply output carries out the energy transfer with switching power supply and high -frequency transformer, two way signals of high -frequency transformer secondary side output, the signal is used for the communication power supply all the way, the signal is used for mainboard load and main control chip power supply all the way, and because two way signals of high -frequency transformer secondary side output do not have electrical connection, thereby realize the electric isolation of communication power supply and mainboard load and main control chip power supply, thereby avoid communication circuit to receive the ripple signal interference of mainboard load and main control chip production.
Description
Technical field
The utility model relates to power technique fields, more particularly, relates to a kind of power circuit shielding system.
Background technology
Within air-conditioning systems, usually can use communication, as RS485 communication and CAN communication etc., these communications are used to control driven compressor mainboard, electric expansion valve drive plate, manual operator usually, or master control borad.If communication is interfered occur communication data mistake, often causes serious engineering accident, therefore, ensure that communication quality is necessary links in engineering design.
And the interference of telecommunication circuit main interference source is exactly the ripple signal interference that mainboard load and main control chip produce.Therefore, the ripple signal interference how avoiding telecommunication circuit to be subject to mainboard load and main control chip generation becomes problem demanding prompt solution.
Utility model content
The purpose of this utility model is to provide a kind of power circuit shielding system, with the ripple signal interference avoiding telecommunication circuit to be subject to mainboard load and main control chip generation.
For achieving the above object, the utility model provides following technical scheme:
A kind of power circuit shielding system, comprising:
The first filter be connected with external dc power;
The Switching Power Supply be connected with described first filter;
The high frequency transformer be connected with described Switching Power Supply, the secondary side of described high frequency transformer has at least two group output interfaces;
The voltage that first group of output interface in described at least two group output interfaces exports is used for power communications;
The voltage that second group of output interface in described at least two group output interfaces exports is used for described mainboard load and main control chip is powered.
Above-mentioned power circuit shielding system, preferably, described first filter is connected with described external dc power by diode, and wherein, the negative electrode of described diode is connected with described first filter, and the anode of described diode is connected with described external dc power.
Above-mentioned power circuit shielding system, preferably, also comprises:
The first rectifier be connected with first group of output interface in described two groups of output interfaces, the pressurizer be connected with described first rectifier, the output of described pressurizer is for connecting telecommunication circuit;
The second rectifier be connected with second group of output interface in described two groups of output interfaces, the second filter be connected with described second rectifier, the output of described second filter, for connecting master control borad, described master control borad is provided with mainboard load and main control chip; The output of described second filter is also connected by the feedback input end of negative-feedback circuit with described Switching Power Supply.
Above-mentioned power circuit shielding system, preferably, described first rectifier and described second rectifier are rectifier diode.
Above-mentioned power circuit shielding system, preferably, described Switching Power Supply is LM5015MHE/NOPB Switching Power Supply.
Above-mentioned power circuit shielding system, preferably, described first filter is RC filter.
Above-mentioned power circuit shielding system, preferably, described high frequency transformer is EP10 high frequency transformer.
Known by above scheme, a kind of power circuit shielding system that the embodiment of the present application provides, the direct current that external dc power exports carries out energy transferring with Switching Power Supply and high frequency transformer, high frequency transformer secondary side exports two paths of signals, one road signal is used for power communications, one road signal is used for mainboard load and main control chip is powered, and be not electrically connected because high frequency transformer secondary side exports two paths of signals, thus realize the electrical isolation that power communications and mainboard load and main control chip power, thus avoid telecommunication circuit to be subject to the ripple signal interference of mainboard load and main control chip generation.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
A kind of structural representation of the power circuit shielding system that Fig. 1 provides for the embodiment of the present application;
The another kind of structural representation of the power circuit shielding system that Fig. 2 provides for the embodiment of the present application;
The another kind of structural representation of the power circuit shielding system that Fig. 3 provides for the embodiment of the present application;
A kind of specific implementation exemplary plot of the power circuit shielding system that Fig. 4 and Fig. 5 provides for the embodiment of the present application.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification and claims and above-mentioned accompanying drawing are for distinguishing similar part, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so that the embodiment of the application described herein can be implemented with the order except illustrated here.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of structural representation of the power circuit shielding system that Fig. 1 provides for the embodiment of the present application, can comprise:
The first filter 11 be connected with external dc power;
The Switching Power Supply 12 be connected with the first filter 11;
The high frequency transformer 13 be connected with Switching Power Supply 12, the secondary side of this high frequency transformer 13 has two groups of output interfaces; The voltage that first group of output interface in these two groups of output interfaces exports is used for powering to telecommunication circuit; The voltage that second group of output interface in these two groups of output interfaces exports is used for powering to mainboard load and main control chip.
Switching Power Supply 12 passes through conducting and the disconnection of the inner IGBT of control switch power supply 12, makes Switching Power Supply 12 output voltage stabilization to desired value.
Primary side voltage transformation is that at least two-way voltage of secondary side exports by high frequency transformer 13, and each road voltage is respectively used to the power supply of disparate modules.
The embodiment of the present application provides power circuit shielding system, the direct current that external dc power exports carries out energy transferring with Switching Power Supply and high frequency transformer, high frequency transformer secondary side exports two paths of signals, one road signal is used for power communications, one road signal is used for mainboard load and main control chip is powered, and be not electrically connected because high frequency transformer secondary side exports two paths of signals, thus realize the electrical isolation that power communications and mainboard load and main control chip power, thus the ripple signal interference avoiding telecommunication circuit to be subject to mainboard load and main control chip producing.
Optionally, on the basis of embodiment described in Fig. 1, the another kind of structural representation of the power circuit shielding system that the embodiment of the present application provides as shown in Figure 2, can also comprise:
The first rectifier 21 be connected with first group of output interface in two groups of output interfaces, the pressurizer 22 be connected with the first rectifier 21, the output of pressurizer 22 is for connecting telecommunication circuit;
The second rectifier 23 be connected with second group of output interface in two groups of output interfaces, the output of the second filter 24, second filter 24 be connected with the second rectifier 23, for connecting master control borad, master control borad is provided with mainboard load and main control chip; The output of the second filter 24 is also connected with the feedback input end of Switching Power Supply 12 by negative-feedback circuit 25.
Optionally, the first rectifier 21 and the second rectifier 23 can be rectifier diode.
Optionally, on basis embodiment illustrated in fig. 1, the another kind of structural representation of the power circuit shielding system that the embodiment of the present application provides as shown in Figure 3, can also comprise:
Diode 31, the first filter 11 is connected with external dc power by diode 31.That is, the anode of diode 31 is connected with external dc power, and the negative electrode of diode 31 is connected with the first filter 11.
In the present embodiment, by increasing diode 31, power circuit shielding system is made to have the function preventing power supply anti-plug.
It should be noted that, diode 31 also may be used for embodiment illustrated in fig. 2 in.
Optionally, Switching Power Supply can be LM5015MHE/NOPB Switching Power Supply.
Optionally, the first filter 11 can be RC filter, also can be pure capacitive filter.
Optionally, high frequency transformer is EP10 high frequency transformer.
As shown in Figure 4 and Figure 5, a kind of specific implementation exemplary plot of the power circuit shielding system provided for the embodiment of the present application.
Wherein, diode D8 is used for preventing power supply anti-plug.
Electric capacity C22, C30, C142 form the first filter, for the ripple signal of power input being sponged or being reflected back power end.
Resistance R42, R20, R4, electric capacity C54, C50, C29, C49, C28, C67, C14, and diode D6, D7 form the peripheral circuit of Switching Power Supply U9.In this example, what Switching Power Supply U9 selected is LM5015 Switching Power Supply.
What high frequency transformer T1 selected is EP10 high frequency transformer.7,8 pins of high frequency transformer T1 secondary side form a road and export, and this road exports and is used for powering for telecommunication circuit; 5,6 pins of high frequency transformer T1 secondary side form another road and export, and this road exports and is used for for main board power supply.
Diode D9 and D11 is two rectifiers.
Regulator block U12, electric capacity C65, C51, C26 form pressurizer, and in this example, regulator block U12 uses 7805 regulator blocks.
Electric capacity C201, C15, inductance L 1 forms the second filter.
Resistance R15, R7, R44, R19 form negative-feedback circuit.
In this example, Switching Power Supply U9 carries out output voltage actual value and desired output voltage by negative feedback conducting and the disconnection of the IGBT contrasting in control switch power supply chip U9, thus making actual output voltage be fitted to desired output voltage, the switching power source chip output voltage stabilization so just realized is to desired value
Above power circuit shielding system provided by the utility model is described in detail.Apply specific case in the embodiment of the present application to set forth principle of the present utility model and execution mode, the explanation of above embodiment just understands core concept of the present utility model for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection range of the utility model claim.
Claims (7)
1. a power circuit shielding system, is characterized in that, comprising:
The first filter be connected with external dc power;
The Switching Power Supply be connected with described first filter;
The high frequency transformer be connected with described Switching Power Supply, the secondary side of described high frequency transformer has at least two group output interfaces;
The voltage that first group of output interface in described at least two group output interfaces exports is used for power communications;
The voltage that second group of output interface in described at least two group output interfaces exports is used for described mainboard load and main control chip is powered.
2. power circuit shielding system according to claim 1, it is characterized in that, described first filter is connected with described external dc power by diode, wherein, the negative electrode of described diode is connected with described first filter, and the anode of described diode is connected with described external dc power.
3. power circuit shielding system according to claim 1, is characterized in that, also comprise:
The first rectifier be connected with first group of output interface in described two groups of output interfaces, the pressurizer be connected with described first rectifier, the output of described pressurizer is for connecting telecommunication circuit;
The second rectifier be connected with second group of output interface in described two groups of output interfaces, the second filter be connected with described second rectifier, the output of described second filter, for connecting master control borad, described master control borad is provided with mainboard load and main control chip; The output of described second filter is also connected by the feedback input end of negative-feedback circuit with described Switching Power Supply.
4. power circuit shielding system according to claim 3, is characterized in that, described first rectifier and described second rectifier are rectifier diode.
5. power circuit shielding system according to claim 1, is characterized in that, described Switching Power Supply is LM5015MHE/NOPB Switching Power Supply.
6. power circuit shielding system according to claim 1, is characterized in that, described first filter is RC filter.
7. power circuit shielding system according to claim 1, is characterized in that, described high frequency transformer is EP10 high frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520989430.0U CN205142040U (en) | 2015-12-02 | 2015-12-02 | Power supply circuit isolated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520989430.0U CN205142040U (en) | 2015-12-02 | 2015-12-02 | Power supply circuit isolated system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142040U true CN205142040U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520989430.0U Active CN205142040U (en) | 2015-12-02 | 2015-12-02 | Power supply circuit isolated system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
-
2015
- 2015-12-02 CN CN201520989430.0U patent/CN205142040U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
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