CN201479028U - Direct current conversion circuit of three-phase power supply - Google Patents
Direct current conversion circuit of three-phase power supply Download PDFInfo
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- CN201479028U CN201479028U CN2009201825824U CN200920182582U CN201479028U CN 201479028 U CN201479028 U CN 201479028U CN 2009201825824 U CN2009201825824 U CN 2009201825824U CN 200920182582 U CN200920182582 U CN 200920182582U CN 201479028 U CN201479028 U CN 201479028U
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Abstract
The utility model relates to the field of an electronic circuit, in particular to the filed of the circuit of the three-phase power supply is characterized in that three phase voltage input ends of the three-phase power supply together with one neutral end form a path of phase power supply input end respectively, and then currents are input into three power supply voltage regulators respectively, and every path of power supply voltage regulator outputs and is connected to a rectifier and filter circuit and then connected to a regulator output circuit for output through each path of isolating circuit. By adopting the technical scheme, the utility model provides a simple and feasible direct current conversion circuit of the three-phase power supply, which is especially applicable to an electric fire monitoring module.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to the power supply electronic circuit field.
Background technology
Three-phase electricity is the three-phase alternating current that one group of amplitude equates, frequency equates, phase place differs from 120 degree mutually, produces by the threephase generator that three windings are arranged, and be industrial power supply commonly used.Therefore common low-voltage dc circuit system must change three phase mains if directly utilize this power supply.And if the electric fire disaster monitoring module adopts the direct-flow storage battery power supply, then necessary periodic charge or replacing safeguard that if after the storage battery infringement, can not electrical fire be monitored, obviously the potential hazard religion is big.So the electric fire disaster monitoring module generally directly is installed on the three-phase circuit, directly takes from its power supply, convert adaptable Dc low voltage power supply (as output DC+5V) again to.And in the time of must guaranteeing wherein certain phase phase shortage, the phase failure, also can provide the electric fire disaster monitoring module needed Dc low voltage power supply.
The utility model content
The utility model is exactly a kind of circuit that the three-phase electricity input is converted to the low-voltage direct out-put supply that designs at this demand.
The technical solution of the utility model is:
Three phase mains DC converting circuit of the present utility model is: three phase voltage inputs of three phase mains respectively all with neutral end as one tunnel power input mutually, import three supply voltage devices respectively, each road supply voltage device is exported and is connected in current rectifying and wave filtering circuit more respectively behind the buffer circuit via each road, is connected to voltage-stabilizing output circuit output.
Further, three of described three phase mains phase voltage inputs also are connected a 4P switch with neutral end.
Further, described current rectifying and wave filtering circuit is two electric capacity of full bridge rectifier and output parallel connection thereof.Perhaps, described current rectifying and wave filtering circuit also can be two electric capacity of half-bridge rectification circuit and output parallel connection thereof.
Further, described buffer circuit is the polarity diode, is series at the cathode output end of described current rectifying and wave filtering circuit respectively.
Further, described voltage-stabilizing output circuit is the output filter capacitor of DC voltage-stabilizing integrated circuit and its output parallel connection.
Further, described DC voltage-stabilizing integrated circuit is 7805 chips, and its Vin end is connected in the negative pole end of described polarity diode, and its GND is terminated at the cathode output end of described current rectifying and wave filtering circuit, and its Vout end is held output filter capacitor in parallel with GND.
The utility model adopts as above technical scheme, has proposed a kind of simple possible, is particularly useful for the phase power supply DC converting circuit that the electric fire disaster monitoring module is used.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Power-switching circuit of the present utility model can guarantee that the power supply supply of electric fire disaster monitoring module is continuous, when certain phase phase shortage, the phase failure take place when, adopt the diode-isolated output principle, the guarantee power supply is supplied with, three power transformers of this former reason connect not isopen and the neutral line respectively and get the 220V AC power, behind rectifying and wave-filtering, are done to isolate respectively to be input to power supply voltage stabilizing integration module by diode, each executive circuit is supplied with in the output DC source.
Consult shown in Figure 1, three phase mains DC converting circuit of the present utility model is: three phase voltage input L1 of three phase mains, L2, L3 respectively all with neutral end N as one tunnel power input mutually, import three supply voltage devices 11,12,13 respectively, each road supply voltage device is exported and is connected in current rectifying and wave filtering circuit 21,22,23 more respectively behind the buffer circuit 31,32,33 via each road, is connected to voltage-stabilizing output circuit 4 outputs.
Consult shown in Figure 2ly, three phase voltage input L1, L2, L3 and neutral end N of described three phase mains also are connected a 4P K switch 1.Described current rectifying and wave filtering circuit the 21,22, the 23rd, two capacitor C 1 of full bridge rectifier VD1, VD2, VD3 and output parallel connection thereof, C2.Perhaps, described current rectifying and wave filtering circuit 21,22,23 also can be two electric capacity of half-bridge rectification circuit and output parallel connection thereof.Described buffer circuit the 31,32, the 33rd, polarity diode D1, D2, D3 are series at the cathode output end of described current rectifying and wave filtering circuit 21,22,23 respectively.Described voltage-stabilizing output circuit 4 is output filter capacitor C3, C4 of DC voltage-stabilizing integrated circuit 7805 chip U1 and its output parallel connection, its Vin end is connected in the negative pole end of described polarity diode D1, D2, D3, its GND is terminated at the cathode output end of described current rectifying and wave filtering circuit 21,22,23, and its Vout end is held output filter capacitor C3 in parallel, C4 with GND.
L1 forms primary coil with neutral end N and secondary coil is formed transformer B1, and voltage meets the bridge rectifier VD1 that is constituted by a diode after the transformation, inserts the filter circuit of being made up of capacitor C 1, capacitor C 2, is input to the 1st pin of power supply chip U1 again; L2 forms primary coil with neutral end N and secondary coil is formed transformer B2, and voltage meets the bridge rectifier VD2 that is constituted by a diode after the transformation, inserts the filter circuit of being made up of capacitor C 1, capacitor C 2, is input to the 1st pin of power supply chip U1 again; L3 forms primary coil with neutral end N and secondary coil is formed transformer B3, and voltage meets the bridge rectifier VD3 that is constituted by a diode after the transformation, inserts the filter circuit of being made up of capacitor C 1, capacitor C 2, is input to the 1st pin of power supply chip U1 again; Through the inner voltage stabilizing of U1,,, export the direct voltage of stable+5V through capacitor C 3, capacitor C 4 high and low frequency filtering by the direct voltage of U1 the 3rd pin output 5V.
When the L1 phase voltage when rectifier output voltage reaches maximum, L2, L3 phase voltage output voltage after rectification are less, when the L2 phase voltage when rectifier output voltage reaches maximum, L1, L3 phase voltage output voltage after rectification are less, when the L3 phase voltage when rectifier output voltage reaches maximum, L1, L2 phase voltage output voltage after rectification are less, therefore distinguish series diode D1 in L1, L2, L 3 phase voltages through rectification output back, D2, D3 isolate output.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (7)
1. three phase mains DC converting circuit, it is characterized in that: three phase voltage inputs (L1, L2, L3) of three phase mains respectively all with neutral end (N) as one tunnel power input mutually, import three supply voltage devices (11,12,13) respectively, each road supply voltage device is exported and is connected in current rectifying and wave filtering circuit (21,22,23) more respectively behind the buffer circuit (31,32,33) via each road, is connected to voltage-stabilizing output circuit (4) output.
2. three phase mains DC converting circuit according to claim 1 is characterized in that: three the phase voltage inputs (L1, L2, L3) and the neutral end (N) of described three phase mains also are connected a 4P switch (K1).
3. three phase mains DC converting circuit according to claim 1 is characterized in that: described current rectifying and wave filtering circuit (21,22,23) is two electric capacity (C1, C2) of full bridge rectifier (VD1, VD2, VD3) and output parallel connection thereof.
4. three phase mains DC converting circuit according to claim 1 is characterized in that: described current rectifying and wave filtering circuit (21,22,23) is two electric capacity of half-bridge rectification circuit and output parallel connection thereof.
5. three phase mains DC converting circuit according to claim 1, it is characterized in that: described buffer circuit (31,32,33) is polarity diode (D1, D2, D3), is series at the cathode output end of described current rectifying and wave filtering circuit (21,22,23) respectively.
6. three phase mains DC converting circuit according to claim 1 is characterized in that: described voltage-stabilizing output circuit (4) is the output filter capacitor (C3, C4) of DC voltage-stabilizing integrated circuit (U1) and its output parallel connection.
7. three phase mains DC converting circuit according to claim 6, it is characterized in that: described DC voltage-stabilizing integrated circuit (U1) is 7805 chips, its Vin end is connected in the negative pole end of described polarity diode (D1, D2, D3), its GND is terminated at the cathode output end of described current rectifying and wave filtering circuit (21,22,23), and its Vout end is held output filter capacitor in parallel (C3, C4) with GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201825824U CN201479028U (en) | 2009-08-13 | 2009-08-13 | Direct current conversion circuit of three-phase power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201825824U CN201479028U (en) | 2009-08-13 | 2009-08-13 | Direct current conversion circuit of three-phase power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479028U true CN201479028U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201825824U Expired - Fee Related CN201479028U (en) | 2009-08-13 | 2009-08-13 | Direct current conversion circuit of three-phase power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN201479028U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475081A (en) * | 2013-09-30 | 2013-12-25 | 河南开启电力实业有限公司 | Auxiliary working power supply for power distribution network control terminal |
-
2009
- 2009-08-13 CN CN2009201825824U patent/CN201479028U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475081A (en) * | 2013-09-30 | 2013-12-25 | 河南开启电力实业有限公司 | Auxiliary working power supply for power distribution network control terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20130813 |