CN201418026Y - Circuit for reducing conducted interference of high frequency high-power switch power supply - Google Patents
Circuit for reducing conducted interference of high frequency high-power switch power supply Download PDFInfo
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- CN201418026Y CN201418026Y CN2009200529679U CN200920052967U CN201418026Y CN 201418026 Y CN201418026 Y CN 201418026Y CN 2009200529679 U CN2009200529679 U CN 2009200529679U CN 200920052967 U CN200920052967 U CN 200920052967U CN 201418026 Y CN201418026 Y CN 201418026Y
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- conducted interference
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Abstract
The utility model discloses a circuit for reducing conductive interference of a high frequency high-power switch power supply, which comprises a rectifier, a transformer, a switch tube and heat radiating fins; the circuit also comprises a first inductor, a second inductor, a first capacitor and a second capacitor; one end of a primary winding of the transformer is connected with the cathode of therectifier through the first inductor, the anode of the rectifier is connected with the emitter of the switch tube through the second inductor, and the collector of the switch tube is connected with the other end of the primary winding of the transformer; the first capacitor is connected with both ends of the rectifier in parallel; the second capacitor is connected with both ends of the primary winding of the transformer and both ends of the switch tube in parallel. The circuit has the advantages that: the conducted interference of the high frequency high-power switch power supply is greatly reduced; the circuit structure of the switch power supply in prior art has no need to be changed due to a kou-shaped filter circuit, and the generality purpose is realized; the circuit has low cost, isconvenient and rapid in mounting.
Description
Technical field
The utility model relates to a kind of anti-jamming circuit, relates in particular to a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference.
Background technology
The main circulation way of high-frequency high-power Switching Power Supply electromagnetic interference is a conducted interference, and conducted interference is divided into differential mode interference and common mode disturbances again, and any conducted interference signal on the power line also can be expressed as common mode disturbances and differential mode interference dual mode.Common mode disturbances is meant by phase line of power and ground wire and is constituted interference in the loop.Differential mode interference is meant the interference in the loop that phase line of power and phase line constitute.The disturbance current of common mode disturbances and differential mode interference correspondence is respectively common mode disturbances electric current and differential mode interference electric current.The common mode disturbances electric current flows in the loop of phase line of power and ground wire formation, and the amplitude on lead is identical with phase place.The differential mode interference electric current flows between the phase line of power line and phase line.The electromagnetic compatibility problem of high-frequency high-power Switching Power Supply has its particularity.Di/dt that the power semiconductor switch pipe produces in switching process and dv/dt cause powerful Conducted Electromagnetic Interference and Harmonic Interference.Some situation also can cause strong-electromagnetic field (normally near field) radiation, therefore, improves antijamming capability and can make circuit stable more, safe and energy-conservation.
The utility model content
The utility model purpose is to provide a kind of circuit that improves antijamming capability, and this circuit is at the high-frequency high-power Switching Power Supply.
The purpose of this utility model can realize by following scheme: a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference, comprise: rectifier, transformer, switching tube, fin is characterized in that: also comprised first, second inductance and first, second electric capacity; Described primary winding one end connects the rectifier negative electrode by first inductance, and the rectifier anode connects the switching tube emitter through second inductance, and the switching tube collector electrode connects the other end of primary winding; First electric capacity is connected in parallel on the rectifier two ends; Second electric capacity is connected in parallel on primary winding and switching tube two ends.
The utility model can also be done following improvement:
The utility model also is provided with three layers of medium between fin and switching tube, compound mode is to place a slice sheet metal in the middle of the two-layer insulated heat-conducting medium; Sheet metal and fin one end are connected to the radio utmost point of switching tube by lead or copper bar, and the other end of fin is connected to the collector electrode of switching tube by electric capacity.
The area size of described sheet metal is identical with fin, and thickness is less than 3mm.
The area size of described insulated heat-conducting medium is identical with fin, and thickness is less than 2mm.
Described sheet metal is the perforated metal sheet, and the diameter in hole is between 3mm～8mm, and the number in hole is 24 integer multiple, and the hole is evenly distributed on the sheet metal.
The utility model advantage is: the conducted interference that has significantly reduced the high-frequency high-power Switching Power Supply; The adding of hollow filter circuit need not change the circuit structure of original Switching Power Supply, has versatility; And it is with low cost, quick and easy for installation.
Description of drawings
Fig. 1 is an electrical block diagram of the present utility model;
Fig. 2 is the optimization filter circuit construction of anti-differential mode interference of the present utility model;
Fig. 3 is the perforated metal sheet of anti-common mode disturbances of the present utility model.
Embodiment
The utility model reduces differential mode interference and reduces distributed capacitance minimizing common mode disturbances by optimizing filter circuit.So just can reduce the conducted interference of high-frequency high-power Switching Power Supply on the whole significantly.
As shown in Figure 1, 2, primary winding one end connects the switching tube collector electrode, the primary winding connects the rectifier negative electrode through inductance L 1, the switching tube radio utmost point connects the rectifier anode through inductance L 2, capacitor C 1 is connected in parallel on the rectifier two ends, and capacitor C 2 is connected in parallel on primary winding and switching tube two ends.Also be provided with three layers of medium between fin and switching tube, structure is BAB, and B is an insulated heat-conducting medium, and A is a sheet metal with holes.One end and the perforated metal sheet of fin are connected to the switching tube emitter by lead or copper bar, and the other end of fin is connected to the switching tube collector electrode by capacitor C p.
The relation that draws inductance and electric capacity according to simulation analysis and computational analysis is as follows: L1=α L2, wherein 20≤α≤30; β C1=C2, wherein 10≤β≤20.The concrete numerical value of inductance L 1, L2 and capacitor C 1, C2 is according to Switching Power Supply watt level value.This optimization filter circuit can reduce the differential mode interference in the circuit.
The main effect of perforated metal sheet A is to provide impedance path to common mode current; The main effect of insulated heat-conducting medium is heat conduction and reduces distributed capacitance.The area size of perforated metal sheet A and insulated heat-conducting medium B is identical with fin, and wherein the thickness of perforated metal sheet is less than 3 millimeters, and the thickness of insulated heat-conducting medium is less than 2 millimeters.
The perforated metal sheet is the metal material of heat conduction, good conductivity, for example Copper Foil, goldleaf etc.As shown in Figure 3, the hole of perforated metal sheet is evenly distributed on the sheet metal.The size in hole and quantity are drawn by simulation analysis and computational analysis, and diameter d is between 3 millimeters and 8 millimeters, and the number N in hole is 24 integral multiple, i.e. N=24n, n=1 wherein, 2,3 ...
Structure of the present utility model has significantly reduced the conducted interference of high-frequency high-power Switching Power Supply, has improved Electro Magnetic Compatibility.And simple in structure, making does not need to change primary circuit structure, highly versatile.
Claims (7)
1, a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference comprises: rectifier, transformer, switching tube, and fin is characterized in that: also comprised first inductance, second inductance and first electric capacity, second electric capacity; Described primary winding one end connects the rectifier negative electrode by first inductance, and the rectifier anode connects the switching tube emitter through second inductance, and the switching tube collector electrode connects the other end of primary winding; First electric capacity is connected in parallel on the rectifier two ends; Second electric capacity is connected in parallel on primary winding and switching tube two ends.
2, a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference according to claim 1 is characterized in that: first inductance value is 20～30 times of second inductance value.
3, a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference according to claim 1 is characterized in that: second capacitance is 10～20 times of first capacitance.
4, a kind of circuit that reduces high-frequency high-power Switching Power Supply conducted interference according to claim 1 is characterized in that: also be provided with three layers of medium between fin and switching tube, compound mode is to place a slice sheet metal in the middle of the two-layer insulated heat-conducting medium; Sheet metal and fin one end are connected to the radio utmost point of switching tube by lead or copper bar, and the other end of fin is connected to the collector electrode of switching tube by electric capacity.
5, according to claim 1 or 4 described a kind of circuit that reduce high-frequency high-power Switching Power Supply conducted interference, it is characterized in that: the area size of described sheet metal is identical with fin, and thickness is less than 3mm.
6, according to claim 1 or 4 described a kind of circuit that reduce high-frequency high-power Switching Power Supply conducted interference, it is characterized in that: the area size of described insulated heat-conducting medium is identical with fin, and thickness is less than 2mm.
7, according to claim 1 or 4 described a kind of circuit that reduce high-frequency high-power Switching Power Supply conducted interference, it is characterized in that: described sheet metal is the perforated metal sheet, the diameter in hole is between 3mm～8mm, and the number in hole is 24 integer multiple, and the hole is evenly distributed on the sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200529679U CN201418026Y (en) | 2009-03-20 | 2009-03-20 | Circuit for reducing conducted interference of high frequency high-power switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200529679U CN201418026Y (en) | 2009-03-20 | 2009-03-20 | Circuit for reducing conducted interference of high frequency high-power switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201418026Y true CN201418026Y (en) | 2010-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200529679U Expired - Fee Related CN201418026Y (en) | 2009-03-20 | 2009-03-20 | Circuit for reducing conducted interference of high frequency high-power switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201418026Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595243A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Method suitable for suppressing common mode electromagnetic interference in wind driven generator driving system |
| CN109828202A (en) * | 2019-03-19 | 2019-05-31 | 国网陕西省电力公司电力科学研究院 | One or two fusion panel switches high-frequency conduction interference experiment platforms and test method |
| CN112821750A (en) * | 2021-01-04 | 2021-05-18 | 格力电器（武汉）有限公司 | Circuit board of power adapter, power adapter and electric equipment |
| WO2023044848A1 (en) * | 2021-09-26 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Switching circuit and power supply device |
| CN116054574A (en) * | 2022-07-07 | 2023-05-02 | 荣耀终端有限公司 | Switching power supply circuit, power adapter and electronic equipment |
-
2009
- 2009-03-20 CN CN2009200529679U patent/CN201418026Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595243A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Method suitable for suppressing common mode electromagnetic interference in wind driven generator driving system |
| CN103595243B (en) * | 2013-11-23 | 2015-12-30 | 大连尚能科技发展有限公司 | Be applicable to the method suppressing common mode electromagnetic interference in wind-driven generator drive system |
| CN109828202A (en) * | 2019-03-19 | 2019-05-31 | 国网陕西省电力公司电力科学研究院 | One or two fusion panel switches high-frequency conduction interference experiment platforms and test method |
| CN112821750A (en) * | 2021-01-04 | 2021-05-18 | 格力电器（武汉）有限公司 | Circuit board of power adapter, power adapter and electric equipment |
| WO2023044848A1 (en) * | 2021-09-26 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Switching circuit and power supply device |
| CN116054574A (en) * | 2022-07-07 | 2023-05-02 | 荣耀终端有限公司 | Switching power supply circuit, power adapter and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100303 Termination date: 20130320 |