CN204361923U - With the Switching Power Supply of Multiple isolated outputs - Google Patents
With the Switching Power Supply of Multiple isolated outputs Download PDFInfo
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- CN204361923U CN204361923U CN201420827300.2U CN201420827300U CN204361923U CN 204361923 U CN204361923 U CN 204361923U CN 201420827300 U CN201420827300 U CN 201420827300U CN 204361923 U CN204361923 U CN 204361923U
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Abstract
The utility model relates to a kind of Switching Power Supply with Multiple isolated outputs, belong to application of electronic technology field, AC power connects one end of high frequency transformer primary coil and the source electrode of power switch pipe by rectifier bridge, the drain electrode of power switch pipe connects the other end of the primary coil of high frequency transformer, high frequency transformer secondary coil 4 with 5 windings be connected successively current rectifying and wave filtering circuit and sampling feedback bleeder circuit after be connected voltage-stabiliser tube, voltage-stabiliser tube connects 2 pin of optocoupler, 1 pin of optocoupler connects 4 and 5 windings, 4 pin of optocoupler connect 2 and 3 windings, 3 pin of optocoupler connect power switch pipe, 8 and 9 winding parallels are on 4 and 5 windings, 8 with 9 windings with 4 and 5 windings are connected respectively a secondary isolating switch power transformer, the secondary coil of secondary isolating switch power transformer is by connecting power output end after voltage stabilizing rectification circuit.The utility model cost is low, and volume is little, good stability, and reliability is high, can provide multiple difference and independently power supply.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, and particularly a kind of Switching Power Supply with Multiple isolated outputs, belongs to application of electronic technology field.
Background technology
Along with development and the innovation of power electronic technology, switch power technology is also constantly being innovated.At present, Switching Power Supply to be widely used nearly all electronic equipment with small-sized, light weight and high efficiency feature, is the indispensable a kind of power mode of current electronics and information industry develop rapidly.But the stability of current used Switching Power Supply, anti-tampering property and heat radiation are not all fine, and have that cost is high, complex structure and other problems, have influence on the reliability and stability of whole electronic circuit.
Utility model content
According to above deficiency of the prior art, problem to be solved in the utility model is: provide a kind of cost low, volume is little, practical, good stability, reliability is high, flexibility is good, can provide multiple difference and the Switching Power Supply of the independently band Multiple isolated outputs of power supply for electronic circuit.
The utility model solves the technical scheme that its technical problem adopts:
The Switching Power Supply of described band Multiple isolated outputs, comprise AC power COM, AC power COM connects rectifier bridge VC1, shunt capacitance one C1 and electric capacity two C2 between output 1 end of rectifier bridge VC1 and output 3 ends, it is characterized in that: output 1 end of rectifier bridge VC1 connects one end of the primary coil of high frequency transformer T1, output 3 end of rectifier bridge VC1 connects the source electrode of power switch pipe V1, the drain electrode of power switch pipe V1 connects the other end of the primary coil of high frequency transformer T1, high frequency transformer T1 secondary coil 4 with 5 windings be connected successively current rectifying and wave filtering circuit and sampling feedback bleeder circuit after be connected voltage-stabiliser tube VZ2, voltage-stabiliser tube VZ2 connects 2 pin of optocoupler N1, 1 pin of optocoupler N1 connects 4 and 5 windings of high frequency transformer T1 secondary coil, 4 pin of optocoupler N1 connect 2 and 3 windings of high frequency transformer T1 secondary coil, 3 pin of optocoupler N1 connect power switch pipe V1, on 5 ends that 8 ends of 8 and 9 windings of high frequency transformer T1 secondary coil and 9 ends are connected to 4 and 5 windings of high frequency transformer T1 secondary coil and 4 ends,
8 of described high frequency transformer T1 secondary coil with 4 of 9 windings and high frequency transformer T1 secondary coil with 5 windings on be connected a secondary isolating switch power transformer T2 respectively, on 5 ends that 1 end of the primary coil of secondary isolating switch power transformer T2 and 2 ends are connected in parallel on 8 ends of 8 and 9 windings of high frequency transformer T1 secondary coil and 4 and 5 windings of 9 ends and high frequency transformer T1 secondary coil and 4 ends, the secondary coil of secondary isolating switch power transformer T2 is by connecting power output end after voltage stabilizing rectification circuit N2.
The Switching Power Supply of described band Multiple isolated outputs is coordinated by multiple secondary isolating switch power transformer T2 and a main switch power supply, multiple difference can be provided and independently power supply for electronic circuit, on main switch power supply and secondary isolating switch power transformer, be equipped with voltage stabilizing rectification circuit simultaneously, ensure that output stability and the reliability of also Switching Power Supply, circuit design is simple, cost is low, and volume is little, has stronger practicality.
Preferred further, the two ends of the primary coil of high frequency transformer T1 are connected in parallel primary protection circuit, primary protection circuit comprises resistance R25, resistance R79, electric capacity C100, Transient Voltage Suppressor V27 and blocking diode V2, the anode of blocking diode V2 connects 1 end of the primary coil of high frequency transformer T1, the negative electrode of blocking diode V2 connects Transient Voltage Suppressor V27, Transient Voltage Suppressor V27 connects 10 ends of the primary coil of high frequency transformer T1, resistance R25, resistance R79 is connected 10 ends of the primary coil of high frequency transformer T1 with parallel branch one end of electric capacity C100, the other end connects the common port of Transient Voltage Suppressor V27 and blocking diode V2.Due to when power switch pipe V1 becomes cut-off by conducting; the primary coil of main switch power supply can produce peak voltage and induced voltage; peak voltage is wherein formed because high frequency transformer exists leakage inductance (i.e. the self-induction of leakage field generation); it is easy to after superposing with induced voltage damage V1; therefore; increase primary protection circuit, carry out clamped to peak voltage or absorb.The primary protection circuit of blocking diode V2, Transient Voltage Suppressor VZ7, resistance R25, resistance R79, electric capacity C100 composition; be connected in parallel on the primary coil of high frequency transformer, can absorbed power device in turn off process due to transformer leakage inductance produce peak voltage.
Preferred further, 2 of high frequency transformer T1 secondary coil are connected with 2 ends of 3 windings 4 pin being connected optocoupler N1 after diode V4 and diode V46 successively, 2 of high frequency transformer T1 secondary coil be connected electric capacity C8 with 3 ends of 3 windings after access 4 pin of optocoupler N1,2 of high frequency transformer T1 secondary coil are also connected the source electrode of power switch pipe V1 with 3 ends of 3 windings.2 and 3 windings are mainly for optocoupler N1 powers, and first voltage carried out rectifying and wave-filtering before entering optocoupler N1, ensure stability and the reliability of voltage.
Preferred further, the grid of power switch pipe V1 connects 3 pin of optocoupler N1, and the source electrode of power switch pipe V1, by being connected 3 pin of optocoupler N1 after electric capacity C3 and resistance R1, connects electric capacity C103 between the grid of power switch pipe V1 and source electrode.Circuit is protected and current limliting, ensures the fail safe of circuit.
Preferred further, inductance L 1 is connected and electric capacity C5 forms LC filter circuit after 4 rectification circuits formed with 5 winding switching diode V44 and diode V3 of high frequency transformer T1 secondary coil, LC filter circuit two ends parallel resistance R4 and resistance R5, resistance R4 is connected 1 end of voltage-stabiliser tube VZ2 with the common port of resistance R5, ground connection after the common port of the 2 ends connection electric capacity C5 and resistance R5 of voltage-stabiliser tube VZ2, 3 ends of voltage-stabiliser tube VZ2 are by connecting 2 pin of optocoupler N1 after resistance R2, between 1 end of voltage-stabiliser tube VZ2 and 3 ends, electric capacity C9 is set, between the common port of resistance R2 and electric capacity C9 and the common port of inductance L 1 and resistance R4, load resistance R3 is set, 4 of high frequency transformer T1 secondary coil with 5 ends of 5 windings by being connected 1 pin of optocoupler N1 after diode V44 and diode V3.
The beneficial effect that the utility model has is:
1, the switching power circuit simplicity of design of band Multiple isolated outputs described in the utility model, cost is low, volume is little, reliability is high, good stability, practical, has range of application more widely.
2, the Switching Power Supply of band Multiple isolated outputs described in the utility model adopts multiple secondary insulating power supply transformers connected in parallel, the impact of main switch power supply can be isolated, multiple secondary switch power supply has respective power supply output loop, multiple difference independently power supply can be provided for electronic circuit, simple and reasonable, easy to use.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the circuit theory diagrams of main switch power supply of the present utility model;
Fig. 3 is the circuit theory diagrams of secondary switch power supply of the present utility model;
In figure, COM, AC power; VC1, rectifier bridge; C1, electric capacity one; C2, electric capacity two; T1, high frequency transformer; V1, power switch pipe; VZ2, voltage-stabiliser tube; N1, optocoupler; T2, secondary isolating switch power transformer; V27, Transient Voltage Suppressor; V2, blocking diode; R3, load resistance; R1, R2, R3, R4, R5, R25, R79, resistance; C3, C5, C8, C9, C100, C103, electric capacity; V3, V4, V44, V46, diode; L1, inductance; N2, voltage stabilizing rectification circuit.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
As shown in Figure 1-Figure 3, the Switching Power Supply of band Multiple isolated outputs described in the utility model, comprise AC power COM, AC power COM connects rectifier bridge VC1, shunt capacitance one C1 and electric capacity two C2 between output 1 end of rectifier bridge VC1 and output 3 ends, it is characterized in that: output 1 end of rectifier bridge VC1 connects one end of the primary coil of high frequency transformer T1, output 3 end of rectifier bridge VC1 connects the source electrode of power switch pipe V1, the drain electrode of power switch pipe V1 connects the other end of the primary coil of high frequency transformer T1, high frequency transformer T1 secondary coil 4 with 5 windings be connected successively current rectifying and wave filtering circuit and sampling feedback bleeder circuit after be connected voltage-stabiliser tube VZ2, voltage-stabiliser tube VZ2 connects 2 pin of optocoupler N1, 1 pin of optocoupler N1 connects 4 and 5 windings of high frequency transformer T1 secondary coil, 4 pin of optocoupler N1 connect 2 and 3 windings of high frequency transformer T1 secondary coil, 3 pin of optocoupler N1 connect power switch pipe V1, on 5 ends that 8 ends of 8 and 9 windings of high frequency transformer T1 secondary coil and 9 ends are connected to 4 and 5 windings of high frequency transformer T1 secondary coil and 4 ends,
8 of described high frequency transformer T1 secondary coil with 4 of 9 windings and high frequency transformer T1 secondary coil with 5 windings on be connected a secondary isolating switch power transformer T2 respectively, on 5 ends that 1 end of the primary coil of secondary isolating switch power transformer T2 and 2 ends are connected in parallel on 8 ends of 8 and 9 windings of high frequency transformer T1 secondary coil and 4 and 5 windings of 9 ends and high frequency transformer T1 secondary coil and 4 ends, the secondary coil of secondary isolating switch power transformer T2 is by connecting power output end after voltage stabilizing rectification circuit.
Wherein, as shown in Figure 1, the two ends of the primary coil of high frequency transformer T1 are connected in parallel primary protection circuit, primary protection circuit comprises resistance R25, resistance R79, electric capacity C100, Transient Voltage Suppressor V27 and blocking diode V2, the anode of blocking diode V2 connects 1 end of the primary coil of high frequency transformer T1, the negative electrode of blocking diode V2 connects Transient Voltage Suppressor V27, Transient Voltage Suppressor V27 connects 10 ends of the primary coil of high frequency transformer T1, resistance R25, resistance R79 is connected 10 ends of the primary coil of high frequency transformer T1 with parallel branch one end of electric capacity C100, the other end connects the common port of Transient Voltage Suppressor V27 and blocking diode V2.
As shown in Figure 1,2 of high frequency transformer T1 secondary coil are connected with 2 ends of 3 windings 4 pin being connected optocoupler N1 after diode V4 and diode V46 successively, 2 of high frequency transformer T1 secondary coil be connected electric capacity C8 with 3 ends of 3 windings after access 4 pin of optocoupler N1,2 of high frequency transformer T1 secondary coil are also connected the source electrode of power switch pipe V1 with 3 ends of 3 windings.The grid of power switch pipe V1 connects 3 pin of optocoupler N1, and the source electrode of power switch pipe V1, by being connected 3 pin of optocoupler N1 after electric capacity C3 and resistance R1, connects electric capacity C103 between the grid of power switch pipe V1 and source electrode.
As shown in Figure 1, inductance L 1 is connected and electric capacity C5 forms LC filter circuit after 4 rectification circuits formed with 5 winding switching diode V44 and diode V3 of high frequency transformer T1 secondary coil, LC filter circuit two ends parallel resistance R4 and resistance R5, resistance R4 is connected 1 end of voltage-stabiliser tube VZ2 with the common port of resistance R5, ground connection after the common port of the 2 ends connection electric capacity C5 and resistance R5 of voltage-stabiliser tube VZ2, 3 ends of voltage-stabiliser tube VZ2 are by connecting 2 pin of optocoupler N1 after resistance R2, between 1 end of voltage-stabiliser tube VZ2 and 3 ends, electric capacity C9 is set, between the common port of resistance R2 and electric capacity C9 and the common port of inductance L 1 and resistance R4, load resistance R3 is set, 4 of high frequency transformer T1 secondary coil with 5 ends of 5 windings by being connected 1 pin of optocoupler N1 after diode V44 and diode V3.
Operation principle of the present utility model:
The utility model in use, meet AC power COM, first AC power COM carries out rectification through rectifier bridge VC1, DC power supply after rectification is connected the primary coil of power switch pipe V1 and high frequency transformer T1 after carrying out filtering by electric capacity one C1 with electric capacity two C2, the primary coil two ends primary protection circuit in parallel of high frequency transformer T1, can absorbed power switching tube V1 turn off process medium/high frequency transformer leakage inductance produce peak voltage, voltage after high frequency transformer T1 passes through rectification circuit, filter circuit, after bleeder circuit and voltage stabilizing circuit are nursed one's health, secondary isolating switch power transformer T2 is connected by the secondary coil of high frequency transformer T1, by secondary isolating switch power transformer T2, transformation is carried out to voltage, voltage output is carried out after eventually passing voltage stabilizing rectification circuit, the quantity connecting independently-powered voltage electronic circuit can be set by the quantity arranging the secondary coil of high frequency transformer T1.The utility model adopts multiple secondary insulating power supply transformers connected in parallel, and can isolate the impact of main switch power supply, multiple secondary power also has respective power supply output loop, provides multiple difference independently power supply circuits, cost is low, volume is little, reliability is high.
Claims (5)
1. the Switching Power Supply with Multiple isolated outputs, comprise AC power (COM), AC power (COM) connects rectifier bridge (VC1), shunt capacitance one (C1) and electric capacity two (C2) between output 1 end of rectifier bridge (VC1) and output 3 ends, it is characterized in that: output 1 end of rectifier bridge (VC1) connects one end of the primary coil of high frequency transformer (T1), output 3 end of rectifier bridge (VC1) connects the source electrode of power switch pipe (V1), the drain electrode of power switch pipe (V1) connects the other end of the primary coil of high frequency transformer (T1), high frequency transformer (T1) secondary coil 4 with 5 windings be connected successively current rectifying and wave filtering circuit and sampling feedback bleeder circuit after be connected voltage-stabiliser tube (VZ2), voltage-stabiliser tube (VZ2) connects 2 pin of optocoupler (N1), 1 pin of optocoupler (N1) connects 4 and 5 windings of high frequency transformer (T1) secondary coil, 4 pin of optocoupler (N1) connect 2 and 3 windings of high frequency transformer (T1) secondary coil, 3 pin of optocoupler (N1) connect power switch pipe (V1), on 5 ends that 8 ends of 8 and 9 windings of high frequency transformer (T1) secondary coil and 9 ends are connected to 4 and 5 windings of high frequency transformer (T1) secondary coil and 4 ends,
8 of described high frequency transformer (T1) secondary coil with 4 of 9 windings and high frequency transformer (T1) secondary coil with 5 windings on be connected a secondary isolating switch power transformer (T2) respectively, on 5 ends that 1 end of the primary coil of secondary isolating switch power transformer (T2) and 2 ends are connected in parallel on 8 ends of 8 and 9 windings of high frequency transformer (T1) secondary coil and 4 and 5 windings of 9 ends and high frequency transformer (T1) secondary coil and 4 ends, the secondary coil of secondary isolating switch power transformer (T2) connects power output end afterwards by voltage stabilizing rectification circuit (N2).
2. the Switching Power Supply of band Multiple isolated outputs according to claim 1, it is characterized in that: the two ends of the primary coil of described high frequency transformer (T1) are connected in parallel primary protection circuit, primary protection circuit comprises resistance R25, resistance R79, electric capacity C100, Transient Voltage Suppressor (V27) and blocking diode (V2), the anode of blocking diode (V2) connects 1 end of the primary coil of high frequency transformer (T1), the negative electrode of blocking diode (V2) connects Transient Voltage Suppressor (V27), Transient Voltage Suppressor (V27) connects 10 ends of the primary coil of high frequency transformer (T1), resistance R25, resistance R79 is connected 10 ends of the primary coil of high frequency transformer (T1) with parallel branch one end of electric capacity C100, the other end connects the common port of Transient Voltage Suppressor (V27) and blocking diode (V2).
3. the Switching Power Supply of band Multiple isolated outputs according to claim 1, it is characterized in that: described 2 of high frequency transformer (T1) secondary coil are connected with 2 ends of 3 windings 4 pin being connected optocoupler (N1) after diode V4 and diode V46 successively, 2 of high frequency transformer (T1) secondary coil be connected electric capacity C8 with 3 ends of 3 windings after access 4 pin of optocoupler (N1), 2 of high frequency transformer (T1) secondary coil are also connected the source electrode of power switch pipe (V1) with 3 ends of 3 windings.
4. the Switching Power Supply of band Multiple isolated outputs according to claim 1, it is characterized in that: the grid of described power switch pipe (V1) connects 3 pin of optocoupler (N1), the source electrode of power switch pipe (V1), by being connected 3 pin of optocoupler (N1) after electric capacity C3 and resistance R1, connects electric capacity C103 between the grid of power switch pipe (V1) and source electrode.
5. the Switching Power Supply of band Multiple isolated outputs according to claim 1, it is characterized in that: be connected inductance (L1) after 4 rectification circuits formed with 5 winding switching diode V44 and diode V3 of described high frequency transformer (T1) secondary coil and electric capacity C5 forms LC filter circuit, LC filter circuit two ends parallel resistance R4 and resistance R5, resistance R4 is connected 1 end of voltage-stabiliser tube (VZ2) with the common port of resistance R5, ground connection after the common port of 2 ends connection electric capacity C5 and resistance R5 of voltage-stabiliser tube (VZ2), 3 ends of voltage-stabiliser tube (VZ2) are by connecting 2 pin of optocoupler (N1) after resistance R2, between 1 end of voltage-stabiliser tube (VZ2) and 3 ends, electric capacity C9 is set, the common port of resistance R2 and electric capacity C9 and between inductance (L1) and the common port of resistance R4, load resistance R3 is set, 4 of high frequency transformer (T1) secondary coil with 5 ends of 5 windings by being connected 1 pin of optocoupler (N1) after diode V44 and diode V3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827300.2U CN204361923U (en) | 2014-12-23 | 2014-12-23 | With the Switching Power Supply of Multiple isolated outputs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827300.2U CN204361923U (en) | 2014-12-23 | 2014-12-23 | With the Switching Power Supply of Multiple isolated outputs |
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| Publication Number | Publication Date |
|---|---|
| CN204361923U true CN204361923U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420827300.2U Expired - Fee Related CN204361923U (en) | 2014-12-23 | 2014-12-23 | With the Switching Power Supply of Multiple isolated outputs |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685211A (en) * | 2016-08-22 | 2017-05-17 | 武汉盛帆电子股份有限公司 | Switching power supply, electrical isolation method and ammeter |
| 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 supply circuit and industrial gateway system |
-
2014
- 2014-12-23 CN CN201420827300.2U patent/CN204361923U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685211A (en) * | 2016-08-22 | 2017-05-17 | 武汉盛帆电子股份有限公司 | Switching power supply, electrical isolation method and ammeter |
| 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 supply circuit and industrial gateway system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20171223 |