CN206992944U - 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
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- CN206992944U CN206992944U CN201720613802.9U CN201720613802U CN206992944U CN 206992944 U CN206992944 U CN 206992944U CN 201720613802 U CN201720613802 U CN 201720613802U CN 206992944 U CN206992944 U CN 206992944U
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- switching power
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- power circuit
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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, are followed by the LC common-mode filters of inductance L2 and C6 composition；Operation principle is that two voltage doubling rectifying circuit reduces half commutating voltage, is reduced when rectifying tube switchs∏ types differential mode filter and LC common-mode filters form 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, interference is reduced conducting and radiating two aspects, High voltage output switching power circuit is also had extremely low output voltage ripple.
Description
Technical field
The utility model belongs to electric and electronic technical field, and in particular to a kind of switch of the extremely low Ripple Noise of High voltage output
Power circuit, can solve the problems, such as that high-voltage switch power supply circuit disturbs Ripple Noise in systems, can increase using the power supply
The machine system reliability of circuit.
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 exists because the high frequency of its built-in switch MOS device and rectifying device opens shut-off
Numerical value is largerBy being coupled on output voltage, make that output ripple noise jamming is big, load system is easily malfunctioned, 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 output is low pressure, and 1% ripple is still with receiving.But if output is more than 200V, 1% ripple voltage can reaches
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, the purpose of this utility model is to provide a kind of extremely low ripple of High voltage output and made an uproar
The switching power circuit of sound, for prior art high-voltage switch power supply output ripple it is larger the problem of, optimize output rectified current
Road, and output filter circuit is optimized, while electromagnetic shielding measure is used, interference is reduced conducting and radiating two aspects, makes height
The switching power circuit of pressure output can also have extremely low output voltage ripple.
To achieve the above object, the technical solution adopted in the utility model is：A kind of extremely low Ripple Noise of High voltage output
Switching power circuit, 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, be followed by the ∏ type differential mode filters of electric capacity C4, inductance L1 and electric capacity C5 compositions, after
Connect the LC common-mode filters of inductance 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 can be reduced to the half for needing voltage, reduce when rectifying tube switchs
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 forms junction filter together, by differential mode Ripple Noise and
Common mode Ripple Noise filters 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 utility model are：
1) during High voltage output, output rectification uses voltage-doubler rectification, and output commutating voltage, which can be reduced to, needs voltage
Half, reduce when rectifying tube switchsReduce 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 the utility model circuit
20mV。
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is shell schematic diagram of the present utility model；Wherein Fig. 2 (a) is the front view of shell；Fig. 2 (b) is Fig. 2's (a)
Left view.
Embodiment
The utility model 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, 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 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, it is 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.
Operation principle of the present utility model is：
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 can be reduced to the half for needing voltage, reduce when rectifying tube switchsDifferential mode inductance L1 and electricity
Appearance C4, electric capacity C5 constitute ∏ type differential mode filters, and common mode inductance L2 and electric capacity C6 constitute LC common-mode filters, ∏ type differential modes
Wave filter and LC common-mode filters form junction filter and filter out differential mode Ripple Noise and common mode Ripple Noise together together.Its
Middle ∏ types differential mode filter and LC common-mode filters can exchange front and back position, can reach and filter out differential mode Ripple Noise and be total to
The effect of mould 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 it is directly in parallel to include electric capacity C2
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, are followed by the LC common modes filter of inductance L2 and electric capacity C6 compositions
Ripple device.
A kind of 2. 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 can be reduced to the half for needing voltage, reduce when rectifying tube switchs
A kind of 3. switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
Inductance L1 and electric capacity C4, the electric capacity C5 stated constitutes ∏ type differential mode filters.
A kind of 4. switching power circuit of the extremely low Ripple Noise of High voltage output according to claim 1, it is characterised in that institute
State be followed by inductance L2 and electric capacity C6 constitutes LC common-mode filters.
A kind of 5. 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 form junction filter together, and differential mode Ripple Noise and common mode ripple are made an uproar
Sound filters out together.
A kind of 6. 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.
A kind of 7. 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 |
|---|---|---|---|
| CN201720613802.9U CN206992944U (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 |
|---|---|---|---|
| CN201720613802.9U CN206992944U (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 |
|---|---|
| CN206992944U true CN206992944U (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720613802.9U Active CN206992944U (en) | 2017-05-27 | 2017-05-27 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
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| CN (1) | CN206992944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972742A (en) * | 2017-05-27 | 2017-07-21 | 孙宏宇 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
-
2017
- 2017-05-27 CN CN201720613802.9U patent/CN206992944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972742A (en) * | 2017-05-27 | 2017-07-21 | 孙宏宇 | A kind of switching power circuit of the extremely low Ripple Noise of High voltage output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180612 Address after: 710065 two, 1 unit, 1 Jinye Road, 70 High-tech Zone, Xi'an, Shaanxi. Patentee after: Xi'an Raytheon Defense Technology Co., Ltd. Address before: 710000 two, 1 unit, 1 Jinye Road, 70 High-tech Zone, Xi'an, Shaanxi. Patentee before: Sun Hongyu |
|
| TR01 | Transfer of patent right |