CN100365903C - Single-phase AC inputting electromagnetic interference killer circuit - Google Patents
Single-phase AC inputting electromagnetic interference killer circuit Download PDFInfo
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- CN100365903C CN100365903C CNB2004100523547A CN200410052354A CN100365903C CN 100365903 C CN100365903 C CN 100365903C CN B2004100523547 A CNB2004100523547 A CN B2004100523547A CN 200410052354 A CN200410052354 A CN 200410052354A CN 100365903 C CN100365903 C CN 100365903C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention discloses a single-phase AC inputting electromagnetic interference inhibiting circuit which relates to the field of single-phase inputting EMC circuits used for inhibiting power consumption devices from generating electromagnetic interference. A common mode inductor L1 of the circuit comprises a first winding N1 and a second winding N2, wherein single-phase input terminals of a power source are connected with both terminals of a first capacitor C1, a first terminal 1 of the first winding N1 and a first terminal 2 of the second winding N2; a sixth capacitor C6 is connected between a second terminal 6 of the first winding N1 and a second terminal 5 of the second winding N2; the common mode inductor L1 also comprises a third winding N3, a fourth capacitor C 4 and a fifth capacitor C5, wherein a series branch of the fifth capacitor C5 is connected in parallel with the sixth capacitor C6; a first terminal 3 of the third winding N3, the first terminal 1 of the first winding N1, and the first terminal 2 of the second winding N2 are cognominal terminals and are grounded. A second terminal 4 of the third winding N3 is connected with a connecting point of the fourth capacitor C4 and the fifth capacitor C5. The present invention can inhibit harmonic waves of high frequency and meet the corresponding EMC standards.
Description
[technical field]
The present invention relates to electromagnetic interference inhibition technology, relate in particular to a kind of single-phase input EMC circuit that can suppress power consumption equipment generation electromagnetic interference.
[background technology]
General single phase alternating current (A.C.) EMC circuit comprises as shown in Figure 1: X capacitor C 1, C6, Y capacitor C 2, C3, C4, C5 and a common mode inductance L1 who is made up of two winding N1, N2; The single-phase input of power supply Vin (L, N) and the two ends of capacitor C 1 and first end (1) of winding N1, first end (2) of winding N2 link to each other, first end (2) end of the same name each other of first end (1) of winding N1 and winding N2; The series arm of capacitor C 2 and capacitor C 3 is in parallel with capacitor C 1, the point of contact ground connection of capacitor C 2 and capacitor C 3; Capacitor C 6 is connected between second end (5) of second end (6) of the winding N1 of end of the same name each other and winding N2, and the series arm of capacitor C 4, capacitor C 5 is in parallel with capacitor C 6, the point of contact ground connection of capacitor C 4 and capacitor C 5.
Above-mentioned circuit is general electromagnetic interference suppression circuit; because have only L line and N line that common mode inductance is arranged; can suppress the common mode disturbances on L line and the N line effectively; but the common mode or the difference mode signal that can not suppress effectively between L line or N line and the ground wire disturb; thereby it can not solve the electromagnetic interference problem under all situations; especially test for radiated interference; it is test power consumption equipment when work electromagnetic interference of spatial emission towards periphery, and it does not distinguish whether electromagnetic interference emit from earth connection.Like this, if power consumption equipment does not have metal shell, or plastic casing, when carrying out the radiated interference test, owing to lacked the shielding action of shell, it is big that the intensity of radiated interference just becomes, and make radiated interference reach relevant standard, and its difficulty will strengthen.
Though above-mentioned general electromagnetic interference suppression circuit can solve the electromagnetic interference problem of a lot of single-phase electric devices, but can not solve power consumption equipment and not have the electromagnetic interference problem that exists in the situation of metal shell ground connection or some Switching Power Supply, can not realize effectively that all suppress the purpose of electromagnetic interference, can not make the electromagnetic interference of all power consumption equipments meet corresponding International or National standard, as the standard of EN55022 class A or B.
[summary of the invention]
The technical problem to be solved in the present invention provides a kind of electromagnetic interference suppression circuit of single phase alternating current (A.C.) input, can effectively suppress electromagnetic interference, and make it reach corresponding electromagnetic compatibility standard.
The present invention realizes by following technical scheme:
A kind of electromagnetic interference suppression circuit of single phase alternating current (A.C.) input.Comprise common mode inductance, first electric capacity and the 6th electric capacity; Described common mode inductance comprises first winding and second winding, the single-phase input of power supply (L, N) and the two ends of first electric capacity and first end of first winding, first end of second winding link to each other, and the 6th electric capacity is connected between second end of second end, second winding of first winding; Described circuit also comprises the 4th electric capacity, the 5th electric capacity, described common mode inductance also comprises the tertiary winding, the series arm of described the 4th electric capacity, the 5th electric capacity is in parallel with the 6th electric capacity, first end end of the same name each other of first end of the described tertiary winding and first end of first winding, second winding, and should hold ground connection, second end of the tertiary winding links to each other with the point of contact of the 4th electric capacity, the 5th electric capacity.
Improvement of the present invention is: described first winding is identical with the number of turn of second winding.
Wherein, the described tertiary winding can be identical with the number of turn of first winding.
Wherein, the described tertiary winding can be different with the number of turn of first winding.
The capacitance of described the 4th electric capacity and the 5th electric capacity equates.
The electromagnetic interference suppression circuit of another kind of single phase alternating current (A.C.) input comprises common mode inductance, first electric capacity and the 6th electric capacity; Described common mode inductance comprises first winding and second winding, the single-phase input of power supply (L, N) and the two ends of first electric capacity and first end of first winding, first end of second winding link to each other, and the 6th electric capacity is connected between second end of second end, second winding of first winding; Described circuit also comprises second electric capacity, the 3rd electric capacity, described common mode inductance also comprises the tertiary winding, the series arm of described second electric capacity, the 3rd electric capacity is in parallel with first electric capacity, first end of the described tertiary winding and first end of first winding, the second winding rhythm, first end end of the same name each other, and should hold ground connection, second end of the tertiary winding links to each other with the point of contact of second electric capacity, the 3rd electric capacity.
Improvement of the present invention is: described first winding is identical with the number of turn of second winding.
Wherein, the described tertiary winding can be identical with the number of turn of first winding.
Wherein, the described tertiary winding can be different with the number of turn of first winding.
The capacitance of described second electric capacity and the 3rd electric capacity equates.
Owing to adopted above-mentioned technical scheme, can be suppressed at the common mode high-frequency harmonic that is coupled to ground wire among circuit or the PCB effectively; Also can suppress the common-mode signal between phase line, center line, any two lines of ground wire, especially for radiated interference, more effective; Can also suppress difference mode signal; Thereby help suppressing conduction or radiated interference, and reach corresponding EMC standard.
[description of drawings]
Fig. 1 is general single phase alternating current (A.C.) EMC circuit diagram.
Fig. 2 is the electromagnetic interference suppression circuit figure of single phase alternating current (A.C.) input of the present invention.
Fig. 3 is the electromagnetic interference suppression circuit figure of another kind of single phase alternating current (A.C.) input of the present invention.
Fig. 4 is the circuit diagram that the present invention is applied to the AC/DC modular power source of Programmable Logic Controller.
[embodiment]
Shown in Figure 2 is a kind of electromagnetic interference suppression circuit of single phase alternating current (A.C.) input, comprises common mode inductance L1, first capacitor C 1 and the 6th capacitor C 6; Described common mode inductance L1 comprises the first winding N1 and the second winding N2, single-phase input L, the N of power supply Vin links to each other with first end 1 of the two ends of first capacitor C 1 and the first winding N1, first end 2 of the second winding N2, and the 6th capacitor C 6 is connected between second end 5 of second end 6, the second winding N2 of the first winding N1; This circuit also comprises the 4th capacitor C 4, the 5th capacitor C 5, described common mode inductance L1 also comprises tertiary winding N3, the series arm of described the 4th capacitor C 4, the 5th capacitor C 5 is in parallel with the 6th capacitor C 6, first end 1 of first end 3 of described tertiary winding N3 and the first winding N1, first end 2 end of the same name each other of the second winding N2, and should hold ground connection, second end 4 of tertiary winding N3 links to each other with the point of contact of the 4th capacitor C 4, the 5th capacitor C 5.
The described first winding N1 is identical with the number of turn of the second winding N2.
Described tertiary winding N3 is identical with the number of turn of the first winding N1, can suppress the common-mode signal between phase line, center line, any two lines of ground wire.
Described tertiary winding N3 is different with the number of turn of the first winding N1, not only can suppress the common-mode signal between phase line, center line, any two lines of ground wire; Can also stretch the difference mode signal between system phase line, center line, any two lines of ground wire.
The capacitance of described the 4th capacitor C 4 and the 5th capacitor C 5 equates.
Shown in Figure 3 is the electromagnetic interference suppression circuit of another kind of single phase alternating current (A.C.) input, comprises common mode inductance L1, first capacitor C 1 and the 6th capacitor C 6; Described common mode inductance L1 comprises the first winding N1 and the second winding N2, single-phase input L, the N of power supply Vin links to each other with first end 1 of the two ends of first capacitor C 1 and the first winding N1, first end 2 of the second winding N2, and the 6th capacitor C 6 is connected between second end 5 of second end 6, the second winding N2 of the first winding N1; This circuit also comprises second capacitor C 2, the 3rd capacitor C 3, described common mode inductance L1 also comprises tertiary winding N3, the series arm of described second capacitor C 2, the 3rd capacitor C 3 is in parallel with first capacitor C 1, first end 1 of first end 3 of described tertiary winding N3 and the first winding N1, first end 2 end of the same name each other of the second winding N2, and should hold ground connection, second end 4 of tertiary winding N3 links to each other with the point of contact of second capacitor C 2, the 3rd capacitor C 3.
The described first winding N1 is identical with the number of turn of the second winding N2.
Described tertiary winding N3 is identical with the number of turn of the first winding N1, can suppress the common-mode signal between phase line, center line, any two lines of ground wire.
Described tertiary winding N3 is different with the number of turn of the first winding N1, not only can suppress the common-mode signal between phase line, center line, any two lines of ground wire, can also stretch the difference mode signal between system phase line, center line, any two lines of ground wire.
The capacitance of described second capacitor C 2 and the 3rd capacitor C 3 equates.
In Fig. 2 and Fig. 3, described common mode inductance L1 is by the first winding N1, the second winding N2, tertiary winding N3 and around forming; Tertiary winding N3 earth terminal is series coil again, can suppress the difference mode signal between phase line, center line, any two lines of ground wire.First capacitor C 1, the 6th capacitor C 6 are as the X high frequency capacitance, be used to suppress the differential mode interference signal, the common mode high-frequency harmonic that common mode inductance L1 suppresses on phase line L, center line N, the ground wire G disturbs, like this, common-mode signal can be effectively suppressed between phase line L and center line N, center line N and ground wire G, phase line L and ground wire G.Second capacitor C 2 and the 3rd capacitor C 3, the 4th capacitor C 4 and the 5th capacitor C 5 mainly suppress the common mode Harmonic Interference on phase line and the center line as Y electric capacity.
In the single phase alternating current (A.C.) input circuit, under general condition, the impedance on the earth connection should be the smaller the better, like this, the easy more inflow ground wire of the electromagnetic interference harmonic current of L line and N line, thus electromagnetic interference alleviated, so do not add impedance device such as electric capacity, resistance or inductance etc. on the general ground wire.But under certain condition; there is not metal shell ground connection or its shell is a plastic casing as equipment; or when in the power module of AC/DC conversion, carrying out voltage transitions; the switching voltage of inner high frequency and electric current are easily and form coupling between the ground wire; induction produces differential mode or common mode disturbances on the ground wire thereby make, and the present invention just can reduce this interference effectively.
Fig. 4 is the circuit diagram that the present invention is applied to the AC/DC modular power source of Programmable Logic Controller, on the basis of Fig. 2,2,3 two ends of rectifier bridge connect second end 6 of the first winding N1 and second end 5 of the second winding N2 respectively, common anode 4 ground connection of rectifier bridge, connect capacitor C 109 between the common anode 4 of rectifier bridge and common cathode 1, the DC/DC transducer is in parallel with described capacitor C 109.
The input voltage of this circuit is a civil power 220V50Hz alternating current, is output as three road direct currents output of isolating with former limit, and wherein two-way 24V/0.65A, 5V/1.0A export commonly, and another road 24V/0.6A is for to export floatingly.This modular power source adopts plastic casing, and the conduction of EMC and radiated interference reach the EN 55022 Class A standards of IEC.The parameter of output circuit is as follows: C1=0.1uF/250Vac, C4=C5=2200PF/1000V, C6=0.22uF/250Vac, the inductance value of three windings of L1 be 300uH (test condition: 1V, 1kHz), coil is Ф 0.60mm, its magnetic material is ferrite R10K, and model is T12*6*4.
Claims (10)
1. the electromagnetic interference suppression circuit of a single phase alternating current (A.C.) input comprises common mode inductance (L1), first electric capacity (C1) and the 6th electric capacity (C6); Described common mode inductance (L1) comprises first winding (N1) and second winding (N2), the single-phase input of power supply (Vin) (L, N) and the two ends of first electric capacity (C1) and first end (1) of first winding (N1), first end (2) of second winding (N2) link to each other, and the 6th electric capacity (C6) is connected between second end (5) of second end (6), second winding (N2) of first winding (N1); It is characterized in that:
Also comprise the 4th electric capacity (C4), the 5th electric capacity (C5), described common mode inductance (L1) also comprises the tertiary winding (N3), the series arm of described the 4th electric capacity (C4), the 5th electric capacity (C5) is in parallel with the 6th electric capacity (C6), first end (2) end of the same name each other of first end (3) of the described tertiary winding (N3) and first end (1) of first winding (N1), second winding (N2), and should hold ground connection, second end (4) of the tertiary winding (N3) links to each other with the point of contact of the 4th electric capacity (C4), the 5th electric capacity (C5).
2. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 1, it is characterized in that: described first winding (N1) is identical with the number of turn of second winding (N2).
3. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 2, it is characterized in that: the described tertiary winding (N3) is identical with the number of turn of first winding (N1).
4. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 2, it is characterized in that: the described tertiary winding (N3) is different with the number of turn of first winding (N1).
5. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 1 is characterized in that: the capacitance of described the 4th electric capacity (C4) and the 5th electric capacity (C5) equates.
6. the electromagnetic interference suppression circuit of a single phase alternating current (A.C.) input comprises common mode inductance (L1), first electric capacity (C1) and the 6th electric capacity (C6); Described common mode inductance (L1) comprises first winding (N1) and second winding (N2), the single-phase input of power supply (Vin) (L, N) and the two ends of first electric capacity (C1) and first end (1) of first winding (N1), first end (2) of second winding (N2) link to each other, and the 6th electric capacity (C6) is connected between second end (5) of second end (6), second winding (N2) of first winding (N1); It is characterized in that:
Also comprise second electric capacity (C2), the 3rd electric capacity (C3), described common mode inductance (L1) also comprises the tertiary winding (N3), the series arm of described second electric capacity (C2), the 3rd electric capacity (C3) is in parallel with first electric capacity (C1), first end (2) end of the same name each other of first end (3) of the described tertiary winding (N3) and first end (1) of first winding (N1), second winding (N2), and should hold ground connection, second end (4) of the tertiary winding (N3) links to each other with the point of contact of second electric capacity (C2), the 3rd electric capacity (C3).
7. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 6, it is characterized in that: described first winding (N1) is identical with the number of turn of second winding (N2).
8. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 7, it is characterized in that: the described tertiary winding (N3) is identical with the number of turn of first winding (N1).
9. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 7, it is characterized in that: the described tertiary winding (N3) is different with the number of turn of first winding (N1).
10. the electromagnetic interference suppression circuit of a kind of single phase alternating current (A.C.) input according to claim 6 is characterized in that: the capacitance of described second electric capacity (C2) and the 3rd electric capacity (C3) equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100523547A CN100365903C (en) | 2004-11-19 | 2004-11-19 | Single-phase AC inputting electromagnetic interference killer circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100523547A CN100365903C (en) | 2004-11-19 | 2004-11-19 | Single-phase AC inputting electromagnetic interference killer circuit |
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| CN1610207A CN1610207A (en) | 2005-04-27 |
| CN100365903C true CN100365903C (en) | 2008-01-30 |
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| CNB2004100523547A Active CN100365903C (en) | 2004-11-19 | 2004-11-19 | Single-phase AC inputting electromagnetic interference killer circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965420B (en) * | 2015-06-02 | 2017-12-05 | 九阳股份有限公司 | A kind of low interference food processor |
| CN105282894A (en) * | 2015-11-23 | 2016-01-27 | 宁波皓升半导体照明有限公司 | LED fluorescent lamp capable of resisting electromagnetic interference |
| JP6451681B2 (en) * | 2016-04-01 | 2019-01-16 | 株式会社村田製作所 | Power converter |
| CN113972658A (en) * | 2020-07-22 | 2022-01-25 | 京东方科技集团股份有限公司 | Anti electric power environment suppression circuit, touch screen and touch display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181114Y (en) * | 1993-12-18 | 1994-10-26 | 国营成都宏明无线电器材总厂 | Three-phase ac power supply wave filter |
| JPH07107670A (en) * | 1993-10-07 | 1995-04-21 | Meidensha Corp | Higher harmonic restraining system |
| CN1036957C (en) * | 1992-10-30 | 1998-01-07 | 摩托罗拉照明公司 | Integrated emi/rfifilter magnetics |
| US6775157B2 (en) * | 2002-06-25 | 2004-08-10 | International Rectifier Corporation | Closed loop active EMI filter for reducing common or differential noise based on an error value |
-
2004
- 2004-11-19 CN CNB2004100523547A patent/CN100365903C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036957C (en) * | 1992-10-30 | 1998-01-07 | 摩托罗拉照明公司 | Integrated emi/rfifilter magnetics |
| JPH07107670A (en) * | 1993-10-07 | 1995-04-21 | Meidensha Corp | Higher harmonic restraining system |
| CN2181114Y (en) * | 1993-12-18 | 1994-10-26 | 国营成都宏明无线电器材总厂 | Three-phase ac power supply wave filter |
| US6775157B2 (en) * | 2002-06-25 | 2004-08-10 | International Rectifier Corporation | Closed loop active EMI filter for reducing common or differential noise based on an error value |
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| CN1610207A (en) | 2005-04-27 |
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Owner name: POWER SUPPLY PRODUCTS (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: AIMOSHENG NETWORK ENERGY SOURCE CO LTD Effective date: 20140903 |
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Free format text: CORRECT: ADDRESS; FROM: 518057 SHENZHEN, GUANGDONG PROVINCE TO: 518101 SHENZHEN, GUANGDONG PROVINCE |
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Effective date of registration: 20140903 Address after: 518101 Guangdong city of Shenzhen province Baoan District Xin'an road two North 68 Street office Honglang District Industrial Park plant Patentee after: Astec power supply (Shenzhen) Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |