CN106972742A - A kind of switching power circuit of the extremely low Ripple Noise of High voltage output - Google Patents
A kind of switching power circuit of the extremely low Ripple Noise of High voltage output Download PDFInfo
- Publication number
- CN106972742A CN106972742A CN201710387901.4A CN201710387901A CN106972742A CN 106972742 A CN106972742 A CN 106972742A CN 201710387901 A CN201710387901 A CN 201710387901A CN 106972742 A CN106972742 A CN 106972742A
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- electric capacity
- switching power
- diode
- power circuit
- extremely low
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- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
Abstract
A kind of switching power circuit of the extremely low Ripple Noise of High voltage output, include electric capacity C2 and be directly parallel in transformer secondary output, the positive termination capacitor C1 of transformer secondary output one end, electric capacity C1 another terminating diode D2 negative electrode and diode D1 anode, diode D2 anode and diode D1 negative electrode meet electric capacity C3 and constitute two voltage doubling rectifying circuit, the ∏ type differential mode filters of C4, L1 and C5 composition are followed by, the LC common-mode filters of inductance L2 and C6 composition are followed by；Operation principle is that two voltage doubling rectifying circuit reduces half commutating voltage, is reduced when rectifying tube is switched∏ types differential mode filter and LC common-mode filters constitute junction filter and filter out differential mode Ripple Noise and common mode Ripple Noise together together；Six face metal packages, form electrical shielding, cut-out radiation ripple voltage transmission path；Rectification circuit and filter circuit are optimized, using electromagnetic shielding, is conducting and is radiating two aspect reduction interference, High voltage output switching power circuit is also had extremely low output voltage ripple.
Description
Technical field
The invention belongs to electric and electronic technical field, and in particular to a kind of Switching Power Supply of the extremely low Ripple Noise of High voltage output
Circuit, can solve the problems, such as that high-voltage switch power supply circuit disturbs Ripple Noise in systems, can increase using the power circuit
Machine system reliability.
Background technology
Switching Power Supply is because caloric value is small, efficiency high and the transformer for eliminating large volume, with small-sized, light weight and height
The characteristics of efficiency, is widely used in the almost all of electronic equipment such as various terminal equipment, communication equipment, military equipment, is to work as
Modern electronics and information industry develops rapidly a kind of indispensable power technology.
But common Switching Power Supply opens shut-off due to the high frequency of its built-in switch MOS device and rectifying device, exists
Numerical value is largerBy being coupled on output voltage, make that output ripple noise jamming is big, make the easy misoperation of load system, electricity
Pointing peak even can damage load.
Common switch power source output voltage ripple is directly related with output voltage, and conventional numerical value is the 1% of output, such as
Fruit is output as low pressure, and 1% ripple is still with receiving.But if more than 200V is output as, 1% ripple voltage can just reach
2V, this is often that system does not allow.
The content of the invention
For the above-mentioned the deficiencies in the prior art of customer service, it is an object of the invention to provide a kind of extremely low Ripple Noise of High voltage output
Switching power circuit, for prior art high-voltage switch power supply output ripple it is larger the problem of, optimize output rectification circuit, and
Output filter circuit is optimized, while using electromagnetic shielding measure, conducting and radiating two aspect reduction interference, making High voltage output
Switching power circuit can also have extremely low output voltage ripple.
To achieve the above object, the technical solution adopted by the present invention is：A kind of switch of the extremely low Ripple Noise of High voltage output
Power circuit, includes electric capacity C2 and is directly parallel in transformer secondary output, the positive termination capacitor C1 of transformer secondary output one end, electric capacity
C1 another terminating diode D2 negative electrode and diode D1 anode, diode D2 anode and diode D1 negative electrode connect electricity
Hold C3 and constitute two voltage doubling rectifying circuit, be followed by the ∏ type differential mode filters of electric capacity C4, inductance L1 and electric capacity C5 compositions, be followed by electricity
Feel the LC common-mode filters of L2 and electric capacity C6 compositions
Described electric capacity C1, electric capacity C2, diode D1, diode D2, electric capacity C3 have collectively constituted two voltage doubling rectifying circuit,
Output commutating voltage, which can be reduced to, needs the half of voltage, reduces when rectifying tube is switched
Described differential mode inductance L1 and electric capacity C4, electric capacity C5 constitute ∏ type differential mode filters.
Described common mode inductance L2 and electric capacity C6 constitutes LC common-mode filters.
Described ∏ types differential mode filter and LC common-mode filters constitutes junction filter together, by differential mode Ripple Noise and
Common mode Ripple Noise is filtered out together.
Described ∏ types differential mode filter and LC common-mode filter interchangeable front and back positions.
Described switching power circuit uses six face metal packages, forms electrical shielding, cut-out radiation ripple voltage transmission
Path.Compared with prior art, the beneficial effects of the invention are as follows：
1) during High voltage output, output rectification uses voltage-doubler rectification, and output commutating voltage, which can be reduced to, needs voltage
Half, reduces when rectifying tube is switchedReduce the output of the interference source of Ripple Noise；
2) two stage filter is used；The first order is filtered using differential mode inductance ∏ types, and the second level is filtered using common mode inductance LC, is made
Differential mode Ripple Noise and common mode Ripple Noise are filtered out together with junction filter；
3) six face metal packages are used, electrical shielding will be formed, simultaneously because combined filter mode is employed, cut-out radiation
Ripple voltage transmission path.
4) radiation transmission path of Ripple Noise has been cut off using six face full metal jacket shieldings, aggregate measures make output line
Ripple can be greatly reduced.Such as 200V High voltage outputs, circuit common output is about 2V, can be reduced to using circuit of the present invention
20mV。
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is shell schematic diagram of the invention；Wherein Fig. 2 (a) is the front view of shell；Fig. 2 (b) is Fig. 2 (a) left view
Figure.
Embodiment
The present invention is described in further details below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, a kind of switching power circuit of the extremely low Ripple Noise of High voltage output includes electric capacity C2 and is directly parallel in
Transformer secondary output, the positive termination capacitor C1 of transformer secondary output one end, electric capacity C1 another terminating diode D2 negative electrode and two
Pole pipe D1 anode, diode D2 anode and diode D1 negative electrode meet electric capacity C3 and constitute two voltage doubling rectifying circuit, are followed by
Electric capacity C4, inductance L1 and electric capacity C5 compositions ∏ type differential mode filters, are followed by the LC common mode filterings of inductance L2 and electric capacity C6 compositions
Device.
As shown in Fig. 2 using six face metal packages, electrical shielding, cut-out radiation ripple voltage transmission path will be formed.
The present invention operation principle be：
As shown in Figure 1, electric capacity C1, electric capacity C2, diode D1, diode D2, electric capacity C3 have collectively constituted voltage-doubler rectification
Circuit, output commutating voltage, which can be reduced to, needs the half of voltage, reduces when rectifying tube is switchedDifferential mode inductance L1 and
Electric capacity C4, electric capacity C5 constitute ∏ type differential mode filters, and common mode inductance L2 and electric capacity C6 constitute LC common-mode filters, and ∏ types are poor
Mode filter and LC common-mode filters constitute junction filter and filter out differential mode Ripple Noise and common mode Ripple Noise together together.
Wherein ∏ types differential mode filter and LC common-mode filters can exchange front and back position, can reach filter out differential mode Ripple Noise and
The effect of common mode Ripple Noise.
Claims (7)
1. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output, it is characterised in that include electric capacity C2 directly in parallel
In transformer secondary output, the positive termination capacitor C1 of transformer secondary output one end, electric capacity C1 another terminating diode D2 negative electrode and
Diode D1 anode, diode D2 anode and diode D1 negative electrode meet electric capacity C3 and constitute two voltage doubling rectifying circuit, after
The ∏ type differential mode filters of electric capacity C4, inductance L1 and electric capacity C5 compositions are connect, the LC common modes filter of inductance L2 and inductance C6 compositions is followed by
Ripple device.
2. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
Electric capacity C1, electric capacity C2, diode D1, diode D2, the electric capacity C3 stated has collectively constituted two voltage doubling rectifying circuit, exports rectified current
Pressure, which can be reduced to, needs the half of voltage, reduces when rectifying tube is switched
3. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
Differential mode inductance L1 and electric capacity C4, the electric capacity C5 stated constitutes ∏ type differential mode filters.
4. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
The common mode inductance L2 and electric capacity C6 stated constitutes LC common-mode filters.
5. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
The ∏ types differential mode filter and LC common-mode filters stated constitute junction filter together, and differential mode Ripple Noise and common mode ripple are made an uproar
Sound is filtered out together.
6. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
The ∏ types differential mode filter and LC common-mode filter interchangeable front and back positions stated.
7. a kind of switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
The switching power circuit stated uses six face metal packages, forms electrical shielding, cut-out radiation ripple voltage transmission path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387901.4A CN106972742A (en) | 2017-05-27 | 2017-05-27 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387901.4A CN106972742A (en) | 2017-05-27 | 2017-05-27 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106972742A true CN106972742A (en) | 2017-07-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710387901.4A Pending CN106972742A (en) | 2017-05-27 | 2017-05-27 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106972742A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449832A (en) * | 2018-03-23 | 2018-08-24 | 佛山德仁照明科技有限公司 | A kind of high performance lED power supply |
| CN109194115A (en) * | 2018-08-29 | 2019-01-11 | 合肥德铭电子有限公司 | Cavity mirror system electromagnetism suppressing device and cavity mirror system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020044885A (en) * | 2000-12-07 | 2002-06-19 | 송재인 | Wide emi filter |
| CN1812241A (en) * | 2005-01-25 | 2006-08-02 | 索尼株式会社 | Switching power supply circuit |
| CN101005754A (en) * | 2006-01-17 | 2007-07-25 | 华为技术有限公司 | Device for screening electromagnetic wave interference |
| JP2009017714A (en) * | 2007-07-06 | 2009-01-22 | Sony Corp | Switching power circuit |
| JP2009095183A (en) * | 2007-10-11 | 2009-04-30 | Eta Electric Industry Co Ltd | Switching power-supply device |
| CN201656765U (en) * | 2010-02-12 | 2010-11-24 | Emif科技有限公司 | EMI filter |
| CN201904734U (en) * | 2010-12-17 | 2011-07-20 | 合肥美亚光电技术股份有限公司 | Bidirectional symmetrical voltage-multiplying rectification circuit |
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| CN206992944U (en) * | 2017-05-27 | 2018-02-09 | 孙宏宇 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
-
2017
- 2017-05-27 CN CN201710387901.4A patent/CN106972742A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020044885A (en) * | 2000-12-07 | 2002-06-19 | 송재인 | Wide emi filter |
| CN1812241A (en) * | 2005-01-25 | 2006-08-02 | 索尼株式会社 | Switching power supply circuit |
| CN101005754A (en) * | 2006-01-17 | 2007-07-25 | 华为技术有限公司 | Device for screening electromagnetic wave interference |
| JP2009017714A (en) * | 2007-07-06 | 2009-01-22 | Sony Corp | Switching power circuit |
| JP2009095183A (en) * | 2007-10-11 | 2009-04-30 | Eta Electric Industry Co Ltd | Switching power-supply device |
| CN201656765U (en) * | 2010-02-12 | 2010-11-24 | Emif科技有限公司 | EMI filter |
| CN201904734U (en) * | 2010-12-17 | 2011-07-20 | 合肥美亚光电技术股份有限公司 | Bidirectional symmetrical voltage-multiplying rectification circuit |
| CN105743334A (en) * | 2016-03-29 | 2016-07-06 | 上海中科深江电动车辆有限公司 | Filtering circuit of low-voltage power supply loop |
| CN206992944U (en) * | 2017-05-27 | 2018-02-09 | 孙宏宇 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449832A (en) * | 2018-03-23 | 2018-08-24 | 佛山德仁照明科技有限公司 | A kind of high performance lED power supply |
| CN109194115A (en) * | 2018-08-29 | 2019-01-11 | 合肥德铭电子有限公司 | Cavity mirror system electromagnetism suppressing device and cavity mirror system |
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Application publication date: 20170721 |