CN103001499A - Medium-power high-pressure input power supply - Google Patents
Medium-power high-pressure input power supply Download PDFInfo
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- CN103001499A CN103001499A CN2012104694972A CN201210469497A CN103001499A CN 103001499 A CN103001499 A CN 103001499A CN 2012104694972 A CN2012104694972 A CN 2012104694972A CN 201210469497 A CN201210469497 A CN 201210469497A CN 103001499 A CN103001499 A CN 103001499A
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Abstract
The invention discloses a medium-power high-pressure input power supply. The power supply comprises a transformer, a first secondary rectification filter circuit, a second secondary rectification filter circuit, a feedback circuit, a control circuit, a resistance capacitance diode (RCD) absorption circuit and an auxiliary power supply (APS) circuit, wherein the transformer is coupled with the first secondary rectification filter circuit and the second secondary rectification filter circuit respectively, the feedback circuit is electrically connected with the second secondary rectification filter circuit, the APS circuit is electrically connected between the control circuit and the transformer, and the RCD absorption circuit is electrically connected with the transformer. Through the mode, the medium-power high-pressure input power supply is capable of enabling the input high pressure range to broaden, large in output power, capable of improving power supply conversion efficiency, low in power consumption, good in reliability and stability and capable of satisfying energy-saving and environmental protection requirements.
Description
Technical field
The present invention relates to the power-supply system field, particularly relate to a kind of middle power high input voltage power supply.
Background technology
Along with the development of generation of electricity by new energy industry electronic technology, the quality requirements of high voltage input low-voltage output power supply is more and more stricter, consumes big country because China is energy, therefore special exploitation and the production of paying attention to energy saving environmental protection product of country.Generally speaking, the high input voltage power supply refers to be limited under the input voltage exchange and is higher than 380V, direct current is higher than 500V, on be limited to the device for converting electric energy that is higher than several kilovolts even several ten thousand volts, the input voltage range of conventional modular power source is 100-370V, power supply voltage range commonly used is 550-990V in the scene system and in the high voltage converter, and the supply district of return tank is 90-1000V.The input power width of general high voltage input power product is narrower, so application is relatively limited to.
Power supply producer is also fewer at the middle power power-supply product of above-mentioned super wide input voltage range, and power reaches 50-200W at present, the demand that is used for various inverters, photovoltaic controller occasion day by day heats up, increasing operating efficiency and reliability that output of products power improves product, is the another important application of super wide high voltage input power system.
At present, during conventional manufacturer production high input voltage power supply product, directly will input high-pressure section with large transformer and change into low pressure, cause small product size large, be unfavorable for processing and installation, in addition, general high voltage input power product directly carries out pressure regulation by voltage regulator, so conversion efficiency is lower.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of middle power high input voltage power supply, and the input high pressure range is broadened, and power output is large, can also improve power supply conversion efficiency, and power consumption is little, and the effect that reliability and stability are good meets the energy-conserving and environment-protective requirement.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of middle power high input voltage power supply to comprise: transformer, first level current rectifying and wave filtering circuit, the second subprime current rectifying and wave filtering circuit, feedback circuit, control circuit, RCD absorbing circuit and auxiliary power circuit, described transformer respectively with first level current rectifying and wave filtering circuit and the coupling of second subprime current rectifying and wave filtering circuit, described feedback circuit and second subprime filter rectifier are electrically connected, described auxiliary power circuit is electrically connected between control circuit and the transformer, and described RCD absorbing circuit and transformer are electrically connected.
In a preferred embodiment of the present invention, described control circuit comprises control chip, described control circuit comprises control chip, described control chip comprises the first pin, the second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin, described the first pin ground connection, described the second pin is connected with the first photoelectric coupling circuit, and described the 3rd pin connects the 3rd resistance, and described the 4th pin connects the 4th resistance, described the 5th pin is unsettled, described the 6th pin is connected with the sampling voltage circuit, and described the 7th pin connects auxiliary power circuit, described the 8th pin connecting valve pipe.
In a preferred embodiment of the present invention, described auxiliary power circuit comprises that resistance the 5th resistance, the first diode and first have polar capacitor, the anode of described the first diode is connected with transformer, negative electrode is connected with an end of the 5th resistance, the other end of described resistance the 5th resistance has the anode of polar capacitor to be connected respectively at control circuit and first, and described first has the minus earth of polar capacitor.
In a preferred embodiment of the present invention, described sampling voltage circuit comprises the 7th resistance and the first electric capacity.
In a preferred embodiment of the present invention, described RCD absorbing circuit comprises the 6th resistance, the second electric capacity and the second diode, and described the 6th resistance is connected with the negative electrode of the second diode afterwards with the second electricity is in parallel, and the anode of the second diode is connected with transformer.
In a preferred embodiment of the present invention, described feedback circuit comprises the second optically coupled circuit and error amplifying circuit.
In a preferred embodiment of the present invention, described the first photoelectric coupling circuit comprises phototriode and the 3rd electric capacity.Described electric capacity the 3rd electric capacity is in parallel with phototriode.
The invention has the beneficial effects as follows: power high input voltage power supply among the present invention, the input high pressure range is broadened, power output is large, can also improve power supply conversion efficiency, and power consumption is little, and the effect that reliability and stability are good meets the energy-conserving and environment-protective requirement.
Description of drawings
Fig. 1 is the structural representation of power high input voltage power supply one preferred embodiment among the present invention;
The mark of each parts is as follows in the accompanying drawing: 1, transformer, 2, first level current rectifying and wave filtering circuit, 3, second subprime current rectifying and wave filtering circuit, 4, feedback circuit, 5, control circuit, 6, the RCD absorbing circuit, 7, auxiliary power circuit, 8, the first optically coupled circuit, the 41, second optically coupled circuit, 42, error amplifying circuit.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
See also Fig. 1, a kind of middle power high input voltage power supply, comprise: transformer 1, first level current rectifying and wave filtering circuit 2, second subprime current rectifying and wave filtering circuit 3, feedback circuit 4, control circuit 5, RCD absorbing circuit 6 and auxiliary power circuit 7, described transformer 1 former limit circuit respectively with first level current rectifying and wave filtering circuit 2 and 3 couplings of second subprime current rectifying and wave filtering circuit, described feedback circuit 4 is electrically connected with the output of second subprime filter rectifier 3, described auxiliary power circuit 7 is electrically connected between the first former limit winding 1 of control circuit 5 and transformer, and described RCD absorbing circuit 6 is electrically connected with the second former limit winding of transformer 1.
In addition, first time level current rectifying and wave filtering circuit 2 comprises: the 3rd diode Dr(n), the first inductance L p(n), second has polar capacitor Co(n) and the 3rd polar capacitor Cp(n is arranged), the 3rd diode Dr(n) 3 ends of cathode connecting transformer TRF1, negative pole connects second polar capacitor Co(n) anodal and the first inductance L p(n) end, the first inductance L p(n) another termination the 3rd has polar capacitor Cp(n) anodal and output one end, second has polar capacitor Co(n) negative pole connects 4 ends of transformer TRF1 and and the 3rd polar capacitor Cp(n arranged) negative pole connects the other end of output, the high voltage that first level current rectifying and wave filtering circuit 2 produces transformer 1 output through after the rectifying and wave-filtering as output voltage.
Second subprime current rectifying and wave filtering circuit 3 comprises: the 4th diode Dr1, the second inductance L p1, the 4th has polar capacitor Co1 and the 5th that polar capacitor Cp1 is arranged, 5 ends of the 4th diode Dr1 cathode connecting transformer 1, negative pole connects the 4th anodal and the second inductance L p1 one end of polar capacitor Co1, another termination the 5th of the second inductance L p1 has anodal and output one end of polar capacitor Cp1, the 4th 6 ends that have polar capacitor Co1 negative pole to meet transformer TRF2 are connected to ground, the 5th has polar capacitor Cp1 negative pole to connect the other end of output, second subprime current rectifying and wave filtering circuit 3 and auxiliary power circuit 7 couplings, to power to control circuit by auxiliary power circuit 7 after the output high-voltage rectifying filtering of transformer 1 generation, make the control chip normal operation.
In addition, described control circuit 5 comprises control chip, described control chip comprises the first pin GND, the second pin FB, the 3rd pin VIN, the 4th pin RI, the 5th pin RT, the 6th pin ISNS, the 7th pin VDO and the 8th pin VO, described the first pin GND ground connection, described the second pin FB is connected with the first photoelectric coupling circuit 8, described the 3rd pin VIN connects the 3rd resistance R 3, described the 4th pin RI connects the 4th resistance R I, and described the 5th pin RT is unsettled, and described the 6th pin ISNS is connected with the sampling voltage circuit, the sampling voltage circuit comprises the 7th resistance R s1 and the first capacitor C s1, is used for current detecting.Described the 7th pin VDO end connects auxiliary power circuit 7, described the 8th pin VO end connecting valve pipe M, this switching tube is metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) in the present embodiment.Control circuit 5 is used for producing the driving signal that makes transformer work, and keeps the normal operation of control chip.
In addition; described RCD absorbing circuit 6 comprises the 6th resistance R sn, the second capacitor C sn and the second diode Dau; be connected with the second diode Dau after described the 6th resistance R sn and the second capacitor C sn parallel connection; the peak voltage that is used for forming for former limit leakage inductance during former frontier juncture is disconnected carries out clamper; so that switching tube is operated in the safety operation area; absorb the peak voltage that reduces in the control circuit, thereby play the protection withstand voltage to metal-oxide-semiconductor, allow metal-oxide-semiconductor be operated in the safety operation area.
In addition, described feedback circuit 4 comprises the second optically coupled circuit 41 and error amplifying circuit 42, the second photoelectric coupling circuit 41 is connected with error amplifying circuit 42, the second photoelectric coupling circuit 41 is electrically connected with second subprime current rectifying and wave filtering circuit 2, the second photoelectric coupling circuit 41 comprises light-emitting diode D2, the 8th resistance R d and biasing resistor Rbias, the 8th resistance R d connects with light-emitting diode D2, biasing resistor Rbias is in parallel with light-emitting diode D2 with the 8th resistance R d, photoelectric coupling circuit 41 is used for realizing the isolation of signal, error amplifying circuit comprises the first resistance R 1, the 9th resistance R _ f, the 4th capacitor C f, accurate source of stable pressure KA431 and the second resistance R 2, the first resistance R 1 one termination outputs one end, another termination the 4th capacitor C f one end and resistance R 2 one ends, R2 other end ground connection, the 9th resistance R _ f one termination light-emitting diode D2 negative pole and accurate source of stable pressure KA431 are anodal, the other end of another termination the 4th capacitor C f, accurate source of stable pressure KA431 minus earth, error amplifying circuit 42 is mainly used in output voltage and reference voltage source behind second subprime current rectifying and wave filtering circuit 3 rectifying and wave-filterings are compared, the error signal that produces is given control circuit through light-coupled isolation, thereby proofreaies and correct output voltage values.
In addition, described the first photoelectric coupling circuit 8 comprises phototriode VT1 and the 3rd capacitor C c.Be connected with control circuit 5 after described electric capacity the 3rd capacitor C c and the phototriode parallel connection.
In addition, auxiliary power circuit circuit 7 comprises: the 5th resistance R a, the first diode Da and polar capacitor Ca is arranged, the vdd terminal of the 5th resistance R a one termination control circuit and have polar capacitor Ca anodal, another terminating diode Da negative pole, there is polar capacitor Ca negative pole to connect 8 ends of transformer TRF2 and connects and ground, diode Da negative pole connects 7 ends of transformer TRF2, auxiliary power circuit 7 is by obtaining the burning voltage of second subprime current rectifying and wave filtering circuit 3 outputs, thereby the Vcc of input control circuit 5 end, give control circuit 5 power supplies, thereby make control chip working properly.
The specific works principle of power high input voltage power supply is as follows among the present invention: input voltage process diode is to capacitor charging, give control circuit 5 power supplies by the 3rd resistance R 3, the energy storage of vdd terminal first has the voltage meeting rising on the polar capacitor Ca, until reach operating voltage, control circuit 5 had and drove the signal generation this moment, and transformer begins energy storage.Because the anti-partially cut-off of output diode, this moment, energy existed in magnetic field; Turn-off when driving signal, when transformer 1 enters anti-sharp work, the positively biased conducting of output diode Dr, according to the turn ratio of the transformer 1 of setting, the energy of transformer 1 primary coil will be delivered to secondary coil, magnetic field energy can be transferred to output capacitance and load, through the switch in a plurality of cycles, feedback circuit 4 steady operations, output voltage reaches set point, auxiliary winding is powered to Vcc simultaneously, makes circuit enter normal mode of operation.And second subprime current rectifying and wave filtering circuit 3 is realized the rectifying and wave-filtering function among the figure, make the low ripple voltage of stable output, error amplifying circuit 42 is made comparisons output voltage with reference voltage source, the error signal that produces is sent and control circuit 5 parts through optical coupling isolation circuit, thereby correction output voltage values, RCD absorbing circuit 6 is used for reducing the peak voltage of power switch pipe M in the control chip, and prevents that magnetic core of transformer is saturated.
Be different from prior art, a kind of middle power high input voltage power supply of the present invention can make the input high pressure range broaden, and power output is large, can also improve power supply conversion efficiency, and power consumption is little, and the effect that reliability and stability are good meets the energy-conserving and environment-protective requirement.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (7)
1. power high input voltage power supply in a kind, it is characterized in that, comprise: transformer, first level current rectifying and wave filtering circuit, second subprime current rectifying and wave filtering circuit, feedback circuit, control circuit, RCD absorbing circuit and auxiliary power circuit, described transformer is respectively at first level current rectifying and wave filtering circuit and the coupling of second subprime current rectifying and wave filtering circuit, described feedback circuit and second subprime filter rectifier are electrically connected, described auxiliary power circuit is electrically connected between control circuit and the transformer, and described RCD absorbing circuit and transformer are electrically connected.
2. middle power high input voltage power supply according to claim 1, it is characterized in that, described control circuit comprises control chip, described control chip comprises the first pin, the second pin, the 3rd pin, the 4th pin, the 5th pin, the 6th pin, the 7th pin and the 8th pin, described the first pin ground connection, described the second pin is connected with the first photoelectric coupling circuit, described the 3rd pin contact resistance the 3rd resistance, described the 4th pin contact resistance the 4th resistance, described the 5th pin is unsettled, described the 6th pin is connected with the sampling voltage circuit, and described the 7th pin connects auxiliary power circuit, and described the 8th pin connects the mosfet switching tube.
3. middle power high input voltage power supply according to claim 1, it is characterized in that, described auxiliary power circuit comprises that resistance the 5th resistance, the first diode and first have polar capacitor, the anode of described the first diode is connected with transformer, negative electrode is connected with an end of the 5th resistance, the other end of described the 5th resistance has the anode of polar capacitor to be connected respectively at control circuit and first, and described first has the minus earth of polar capacitor.
4. middle power high input voltage power supply according to claim 2 is characterized in that described sampling voltage circuit comprises the 7th resistance and the first electric capacity.
5. middle power high input voltage power supply according to claim 1, it is characterized in that, described RCD absorbing circuit comprises the 6th resistance, the second electric capacity and diode, is connected with the negative electrode of diode behind described the 6th resistance and the second Capacitance parallel connection, and the anode of diode is connected with transformer.
6. middle power high input voltage power supply according to claim 1 is characterized in that described feedback circuit comprises the second optically coupled circuit and error amplifying circuit.
7. middle power high input voltage power supply according to claim 1 is characterized in that described the first photoelectric coupling circuit comprises phototriode VT1 and the 3rd electric capacity, and described electric capacity the 3rd electric capacity is in parallel with phototriode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104694972A CN103001499A (en) | 2012-11-20 | 2012-11-20 | Medium-power high-pressure input power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104694972A CN103001499A (en) | 2012-11-20 | 2012-11-20 | Medium-power high-pressure input power supply |
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| CN103001499A true CN103001499A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104694972A Pending CN103001499A (en) | 2012-11-20 | 2012-11-20 | Medium-power high-pressure input power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009643A (en) * | 2014-05-06 | 2014-08-27 | 苏州汇川技术有限公司 | Flyback switching power supply of low voltage stress absorption circuit |
| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57157316A (en) * | 1981-03-25 | 1982-09-28 | Nec Corp | Switching power supply circuit |
| CN201054545Y (en) * | 2007-06-01 | 2008-04-30 | 佛山市顺德区瑞德电子实业有限公司 | Middle power multi-channel output thin switch power supply |
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
-
2012
- 2012-11-20 CN CN2012104694972A patent/CN103001499A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57157316A (en) * | 1981-03-25 | 1982-09-28 | Nec Corp | Switching power supply circuit |
| CN201054545Y (en) * | 2007-06-01 | 2008-04-30 | 佛山市顺德区瑞德电子实业有限公司 | Middle power multi-channel output thin switch power supply |
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009643A (en) * | 2014-05-06 | 2014-08-27 | 苏州汇川技术有限公司 | Flyback switching power supply of low voltage stress absorption circuit |
| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
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Application publication date: 20130327 |