CN203896194U - Switch power supply - Google Patents
Switch power supply Download PDFInfo
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- CN203896194U CN203896194U CN201420206165.XU CN201420206165U CN203896194U CN 203896194 U CN203896194 U CN 203896194U CN 201420206165 U CN201420206165 U CN 201420206165U CN 203896194 U CN203896194 U CN 203896194U
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- photoelectrical coupler
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Abstract
The utility model provides a technical scheme for a switch power supply, comprising a three phase rectification circuit which is in connection with a control circuit through a voltage detection circuit. The control circuit is in connection with a full bridge power circuit through a driving circuit. The three phase rectification circuit is directly in connection with the full bridge power circuit; the full bridge power circuit is in connection with a primary coil of a transformer; a secondary coil of the transformer is in connection with a reactive circuit through a rectification filter circuit; the reactive circuit is in connection with the control circuit. The switch power supply of the technical scheme removes high voltage electrolytic capacitors, reduces cost and has the characteristics of long service life, small size, high temperature resistance and low failure rate.
Description
Technical field
The utility model relates to a kind of power supply unit, especially a kind of Switching Power Supply.
Background technology
In the prior art, known technology is that existing high power switch DC power supply generally adopts " AC-DC-AC-straight " mode, be that three-phase alternating current is come in, through high-voltage rectifying, hv filtering becomes level and smooth high voltage direct current, through switching circuit inversion, it is high-frequency interchange, be transformed to as required required voltage, again through lower pressure rectifier, low-voltage filter, export the direct voltage of large electric current, friendship-straight link in input has adopted jumbo high-voltage electrolytic capacitor, cause cost high, life-span is short, volume is large, non-refractory, power factor is low, the shortcomings such as failure rate height, this is the existing weak point of prior art.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of Switching Power Supply, removes high-voltage electrolytic capacitor, has reduced cost, and long service life, and volume is little, high temperature resistant, failure rate is low.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of Switching Power Supply, comprise rectified three-phase circuit, described rectified three-phase circuit output is leaded up to voltage detecting circuit and is connected with control circuit, described control circuit is connected with full bridge power circuit by drive circuit, another road of described rectified three-phase circuit output directly connects full bridge power circuit, described full bridge power circuit is connected with the primary coil of transformer, the secondary coil of described transformer feeds back to control circuit by output direct current one tunnel through feedback circuit by current rectifying and wave filtering circuit, another road output.The utility model after rectified three-phase circuit AC rectification directly with carry out power back-off, and do not adopt jumbo high-voltage electrolytic capacitor, effectively avoided the deficiencies in the prior art part.
Further, full bridge power circuit brachium pontis comprises field effect transistor, IGBT or IPM power model, and described field effect transistor, IGBT or IPM power model are connected with control circuit by drive circuit; Described full bridge power circuit output end is connected with the primary coil of transformer.
Further, drive circuit is photoelectrical coupler, and the input of described photoelectrical coupler is connected with control circuit, and output is connected with field effect transistor, IGBT or IPM power model.
Further, full bridge power circuit is formed by four field effect transistor bridge joints, is respectively the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor; Described the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor are connected with control circuit by the first photoelectrical coupler, the second photoelectrical coupler, the 3rd photoelectrical coupler and the 4th photoelectrical coupler respectively.
Further, control circuit is connected with the first photoelectrical coupler, 2 pin of the first photoelectrical coupler are connected with control circuit, 3 pin ground connection of the first photoelectrical coupler, 6 pin of the first photoelectrical coupler are connected with 7 pin, 8 pin of the first photoelectrical coupler are connected with power supply VCC by the first diode, 6 pin of the first photoelectrical coupler are connected with the grid of the first field effect transistor by the first resistance, 5 pin of the first photoelectrical coupler are connected with the source electrode of the first field effect transistor, the drain electrode of the first field effect transistor is connected with rectified three-phase circuit, the source electrode of the first field effect transistor is connected with the A of transformer end, the B end of transformer is connected with the drain electrode of the 4th field effect transistor, the grid of the 4th field effect transistor is connected with 6 pin of the 4th photoelectrical coupler by the 4th resistance, 2 pin of the 4th photoelectrical coupler are connected with control circuit, 4 pin ground connection of the 4th photoelectrical coupler, 8 pin of the 4th photoelectrical coupler are connected with power supply VCC, 5 pin of the 4th photoelectrical coupler are connected with the source electrode of the 4th field effect transistor, the source electrode of the 4th field effect transistor is connected with rectified three-phase circuit,
Described control circuit is also connected with control circuit with 2 pin of the second photoelectrical coupler, 3 pin ground connection of the second photoelectrical coupler, 6 pin of the second photoelectrical coupler are connected with 7 pin, 8 pin of the second photoelectrical coupler are connected with power supply VCC by the second diode, 6 pin of the second photoelectrical coupler are connected with the grid of the second field effect transistor by the second resistance, 5 pin of the second photoelectrical coupler are connected with the source electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with rectified three-phase circuit, the source electrode of the second field effect transistor is connected with the B of transformer end, the A end of transformer is connected with the drain electrode of the 3rd field effect transistor, the grid of the 3rd field effect transistor is connected with 6 pin of the 3rd photoelectrical coupler by the 3rd resistance, 2 pin of the 3rd photoelectrical coupler are connected with control circuit, 4 pin ground connection of the 3rd photoelectrical coupler, 8 pin of the 3rd photoelectrical coupler are connected with power supply VCC, 5 pin of the 3rd photoelectrical coupler are connected with the source electrode of the 3rd field effect transistor, the source electrode of the 3rd field effect transistor is connected with rectified three-phase circuit.
Further, voltage detecting circuit is connected in parallel on rectified three-phase circuit output, by upper resistance and lower resistance, is in series, and upper resistance is drawn with control circuit input and is connected with the connected node of lower resistance.
Further, feedback circuit comprises the 5th photoelectrical coupler, 3 pin ground connection of the 5th photoelectrical coupler, 4 pin of the 5th photoelectrical coupler are connected with control circuit, 4 pin of the 5th photoelectrical coupler are connected with power supply VCC by the 6th resistance, 1 pin of the 5th photoelectrical coupler is connected with outlet terminal, and 2 pin of the 5th photoelectrical coupler are connected with current rectifying and wave filtering circuit.
Further, the depression that the commutating voltage of rectified three-phase circuit output detects this voltage by voltage detecting circuit is given control circuit, and described rectified three-phase circuit directly connects full bridge power circuit.
Further, control circuit is voltage-controlled waveform generator, and described voltage-controlled waveform generator is analog voltage-controlled waveform generator or digital voltage-controlled waveform generator.The utility model detects the depression of voltage after rectification by voltage detecting circuit divider resistance and gives control circuit, and control circuit generates the adjustable pulse shape control full bridge power circuit of duty ratio and carries out power back-off to arranging rear voltage.The control circuit that the utility model adopts is current integrated any one voltage-controlled waveform generator on the market, also can adopt various analog or digital can realizations according to the circuit of the Voltage-output variable duty ratio impulse waveform detecting.
Beneficial effect: the voltage waveform of the utility model after due to rectified three-phase circuit rectification in this scheme detected by voltage detecting circuit, control circuit is controlled full bridge power circuit according to the voltage sag detecting and is compensated, transformer output current also send control circuit by feedback circuit, and then control circuit control full bridge power circuit is compensated, obtain level and smooth high voltage direct current, the utility model does not adopt jumbo high-voltage electrolytic capacitor, effectively avoided the deficiencies in the prior art part, and cost is low, volume is little, power factor (PF) is high and failure rate is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the circuit diagram of the utility model embodiment.
In figure, 1 is rectified three-phase circuit, and 2 is control circuit, and 3 is drive circuit, and 4 is transformer, and 5 is current rectifying and wave filtering circuit, and 6 is feedback circuit, and 7 is voltage detecting circuit, and 8 is full bridge power circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the Switching Power Supply that the utility model provides, comprise rectified three-phase circuit 1, described rectified three-phase circuit 1 is connected with a control circuit 2 by a voltage detecting circuit 7, described control circuit 2 is connected with full bridge power circuit 8 by drive circuit 3, rectified three-phase circuit 1 is directly connected with full bridge power circuit 8, full bridge power circuit 8 is connected with the primary coil of transformer 4, the secondary coil of transformer 4 is connected with feedback circuit 6 by current rectifying and wave filtering circuit 5, and feedback circuit 6 is connected with control circuit 2.
Described voltage detecting circuit 7 comprises upper resistance R5 and the lower resistance R 6 that is connected in parallel on rectified three-phase circuit 1 output after series connection, and the link of upper resistance R5 and lower resistance R 6 is connected with control circuit.
Described drive circuit 3 is photoelectrical coupler, and the input of photoelectrical coupler is connected with control circuit, and the output of photoelectrical coupler is connected with full bridge power circuit.
Described full bridge power circuit 8 is can be formed by four field effect transistor or IGBT pipe or IPM power model bridge joint according to the difference of electric current, and each field effect transistor connects a photoelectrical coupler as driving.
As shown in Figure 2, control circuit and the first photoelectrical coupler U1, 2 pin of the first photoelectrical coupler U1 are connected with control circuit, the 3 pin ground connection of the first photoelectrical coupler U1, 6 pin of the first photoelectrical coupler U1 are connected with 7 pin, 8 pin of the first photoelectrical coupler U1 are connected with VCC by first diode D1, 6 pin of the first photoelectrical coupler U1 are connected with the grid of the first field effect transistor Q1 by the first resistance R 1, 5 pin of the first photoelectrical coupler U1 are connected with the source electrode of the first field effect transistor Q1, the drain electrode of the first field effect transistor Q1 is connected with rectified three-phase circuit, the first source electrode of field effect transistor Q1 and the A of transformer end are connected, the B end of transformer is connected with the drain electrode of the 4th field effect transistor Q4, the grid of the 4th field effect transistor Q4 is connected with 6 pin of the 4th photoelectrical coupler U4 by the 4th resistance R 4, 2 pin of the 4th photoelectrical coupler U4 are connected with control circuit, the 4 pin ground connection of the 4th photoelectrical coupler U4, 8 pin of the 4th photoelectrical coupler U4 are connected with VCC, 5 pin of the 4th photoelectrical coupler U4 are connected with the source electrode of the 4th field effect transistor Q4, the source electrode of the 4th field effect transistor Q4 is connected with rectified three-phase circuit.
Described control circuit also with the second photoelectrical coupler U2, 2 pin of the second photoelectrical coupler U2 are connected with control circuit, the 3 pin ground connection of the second photoelectrical coupler U2, 6 pin of the second photoelectrical coupler U2 are connected with 7 pin, 8 pin of the second photoelectrical coupler U2 are connected with VCC by second diode D2, 6 pin of the second photoelectrical coupler U2 are connected with the grid of the second field effect transistor Q2 by the second resistance R 2, 5 pin of the second photoelectrical coupler U2 are connected with the source electrode of the second field effect transistor Q2, the drain electrode of the second field effect transistor Q2 is connected with rectified three-phase circuit, the second source electrode of field effect transistor Q2 and the B of transformer end are connected, the A end of transformer is connected with the drain electrode of the 3rd field effect transistor Q3, the grid of the 3rd field effect transistor Q3 is connected with 6 pin of the 3rd photoelectrical coupler U3 by the 3rd resistance R 3, 2 pin of the 3rd photoelectrical coupler U3 are connected with control circuit, the 4 pin ground connection of the 3rd photoelectrical coupler U3, 8 pin of the 3rd photoelectrical coupler U3 are connected with VCC, 5 pin of the 3rd photoelectrical coupler U3 are connected with the source electrode of the 3rd field effect transistor Q3, the source electrode of the 3rd field effect transistor Q3 is connected with rectified three-phase circuit.In the present embodiment, control circuit is DSPIC33FJ12MC202.
Described feedback circuit 6 comprises the 5th photoelectrical coupler U5, the 3 pin ground connection of the 5th photoelectrical coupler U5,4 pin of the 5th photoelectrical coupler U5 are connected with control circuit, 4 pin of the 5th photoelectrical coupler U5 are connected with VCC by the 6th resistance R 6,1 pin of the 5th photoelectrical coupler U5 is connected with outlet terminal, and 2 pin of the 5th photoelectrical coupler U5 are connected with current rectifying and wave filtering circuit 5.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (9)
1. a Switching Power Supply, comprise rectified three-phase circuit, it is characterized in that: described rectified three-phase circuit output is leaded up to voltage detecting circuit and is connected with control circuit, described control circuit is connected with full bridge power circuit by drive circuit, another road of described rectified three-phase circuit output directly connects full bridge power circuit, described full bridge power circuit is connected with the primary coil of transformer, the secondary coil of described transformer feeds back to control circuit by output direct current one tunnel through feedback circuit by current rectifying and wave filtering circuit, another road output.
2. a kind of Switching Power Supply according to claim 1, is characterized in that: described full bridge power circuit brachium pontis comprises field effect transistor, IGBT or IPM power model, and described field effect transistor, IGBT or IPM power model are connected with control circuit by drive circuit; Described full bridge power circuit output end is connected with the primary coil of transformer.
3. a kind of Switching Power Supply according to claim 2, is characterized in that: described drive circuit is photoelectrical coupler, and the input of described photoelectrical coupler is connected with control circuit, and output is connected with field effect transistor, IGBT or IPM power model.
4. according to a kind of Switching Power Supply described in claim 2 or 3, it is characterized in that: described full bridge power circuit is formed by four field effect transistor bridge joints, be respectively the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor; Described the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor are connected with control circuit by the first photoelectrical coupler, the second photoelectrical coupler, the 3rd photoelectrical coupler and the 4th photoelectrical coupler respectively.
5. a kind of Switching Power Supply according to claim 4, it is characterized in that: described control circuit is connected with the first photoelectrical coupler, 2 pin of the first photoelectrical coupler are connected with control circuit, 3 pin ground connection of the first photoelectrical coupler, 6 pin of the first photoelectrical coupler are connected with 7 pin, 8 pin of the first photoelectrical coupler are connected with power supply VCC by the first diode, 6 pin of the first photoelectrical coupler are connected with the grid of the first field effect transistor by the first resistance, 5 pin of the first photoelectrical coupler are connected with the source electrode of the first field effect transistor, the drain electrode of the first field effect transistor is connected with rectified three-phase circuit, the source electrode of the first field effect transistor is connected with the A of transformer end, the B end of transformer is connected with the drain electrode of the 4th field effect transistor, the grid of the 4th field effect transistor is connected with 6 pin of the 4th photoelectrical coupler by the 4th resistance, 2 pin of the 4th photoelectrical coupler are connected with control circuit, 4 pin ground connection of the 4th photoelectrical coupler, 8 pin of the 4th photoelectrical coupler are connected with power supply VCC, 5 pin of the 4th photoelectrical coupler are connected with the source electrode of the 4th field effect transistor, the source electrode of the 4th field effect transistor is connected with rectified three-phase circuit,
Described control circuit is also connected with control circuit with 2 pin of the second photoelectrical coupler, 3 pin ground connection of the second photoelectrical coupler, 6 pin of the second photoelectrical coupler are connected with 7 pin, 8 pin of the second photoelectrical coupler are connected with power supply VCC by the second diode, 6 pin of the second photoelectrical coupler are connected with the grid of the second field effect transistor by the second resistance, 5 pin of the second photoelectrical coupler are connected with the source electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with rectified three-phase circuit, the source electrode of the second field effect transistor is connected with the B of transformer end, the A end of transformer is connected with the drain electrode of the 3rd field effect transistor, the grid of the 3rd field effect transistor is connected with 6 pin of the 3rd photoelectrical coupler by the 3rd resistance, 2 pin of the 3rd photoelectrical coupler are connected with control circuit, 4 pin ground connection of the 3rd photoelectrical coupler, 8 pin of the 3rd photoelectrical coupler are connected with power supply VCC, 5 pin of the 3rd photoelectrical coupler are connected with the source electrode of the 3rd field effect transistor, the source electrode of the 3rd field effect transistor is connected with rectified three-phase circuit.
6. a kind of Switching Power Supply according to claim 1, it is characterized in that: described voltage detecting circuit is connected in parallel on rectified three-phase circuit output, by upper resistance and lower resistance, be in series, upper resistance is drawn with control circuit input and is connected with the connected node of lower resistance.
7. a kind of Switching Power Supply according to claim 1, it is characterized in that: described feedback circuit comprises the 5th photoelectrical coupler, 3 pin ground connection of the 5th photoelectrical coupler, 4 pin of the 5th photoelectrical coupler are connected with control circuit, 4 pin of the 5th photoelectrical coupler are connected with power supply VCC by the 6th resistance, 1 pin of the 5th photoelectrical coupler is connected with outlet terminal, and 2 pin of the 5th photoelectrical coupler are connected with current rectifying and wave filtering circuit.
8. a kind of Switching Power Supply according to claim 1, is characterized in that: the depression that the commutating voltage of described rectified three-phase circuit output detects this voltage by voltage detecting circuit is given control circuit, and described rectified three-phase circuit directly connects full bridge power circuit.
9. according to a kind of Switching Power Supply described in claim 1,2,3,5,6,7 or 8, it is characterized in that: described control circuit is voltage-controlled waveform generator, described voltage-controlled waveform generator is analog voltage-controlled waveform generator or digital voltage-controlled waveform generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206165.XU CN203896194U (en) | 2014-04-25 | 2014-04-25 | Switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420206165.XU CN203896194U (en) | 2014-04-25 | 2014-04-25 | Switch power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203896194U true CN203896194U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420206165.XU Expired - Fee Related CN203896194U (en) | 2014-04-25 | 2014-04-25 | Switch power supply |
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| CN (1) | CN203896194U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107683006A (en) * | 2017-08-23 | 2018-02-09 | 广路智能科技有限公司 | A kind of more staggeredly direct current HID Switching Power Supplies |
| CN107690219A (en) * | 2017-08-23 | 2018-02-13 | 广路智能科技有限公司 | A kind of half-bridge more staggeredly direct current HID Switching Power Supplies |
-
2014
- 2014-04-25 CN CN201420206165.XU patent/CN203896194U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107683006A (en) * | 2017-08-23 | 2018-02-09 | 广路智能科技有限公司 | A kind of more staggeredly direct current HID Switching Power Supplies |
| CN107690219A (en) * | 2017-08-23 | 2018-02-13 | 广路智能科技有限公司 | A kind of half-bridge more staggeredly direct current HID Switching Power Supplies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150425 |
|
| EXPY | Termination of patent right or utility model |