CN115664193A - High-power switching power supply conducted interference filter circuit - Google Patents
High-power switching power supply conducted interference filter circuit Download PDFInfo
- Publication number
- CN115664193A CN115664193A CN202211309031.6A CN202211309031A CN115664193A CN 115664193 A CN115664193 A CN 115664193A CN 202211309031 A CN202211309031 A CN 202211309031A CN 115664193 A CN115664193 A CN 115664193A
- Authority
- CN
- China
- Prior art keywords
- common mode
- coil
- mode inductor
- hollow coil
- filter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention discloses a high-power switching power supply conducted interference filter circuit, which comprises a common-mode inductor and an air coil, wherein the common-mode inductor is an annular inductor of an annular magnetic core, the air coil is arranged on one surface of the common-mode inductor, the air coil is a spiral air coil, the central axis of a central hole of the air coil is coaxial with or parallel to the central axis of the annular magnetic core of the common-mode inductor, after the air coil and the common-mode inductor are electrified, a magnetic field generated by the air coil interacts with the magnetic leakage of the common-mode inductor to increase the magnetic leakage of the common-mode inductor so as to increase the differential mode component of the common-mode inductor, and the air coil takes the magnetic leakage of the common-mode inductor as a virtual 'magnetic core' to increase the differential mode inductance of the air coil. The invention can effectively filter the conducted interference of a high-power switching power supply product.
Description
Technical Field
The invention relates to a conducted interference filter circuit of a switching power supply, in particular to a conducted interference filter circuit of a high-power switching power supply.
Background
Electromagnetic Compatibility (EMC) refers to the ability of a device or system to perform satisfactorily in its Electromagnetic environment and not to generate unacceptable Electromagnetic interference to other devices in its environment. Therefore, EMC includes 2 aspects, one is that Electromagnetic Interference (EMI) generated by the equipment to the environment during normal operation cannot exceed a certain limit; another aspect refers to a device having a certain degree of immunity to Electromagnetic disturbances, i.e., electromagnetic Susceptibility (EMS), that exist in the environment in which it is located. EMI interference is divided into two types of transmission direction and radiation direction, and the filter circuit provided by the invention mainly solves the interference in the transmission direction.
In the international certification standards, the conducted interference limiting standard of the switching power supply mostly refers to the conducted interference limiting value specification in the CISPR32/EN55032CLASS B standard, and is shown in detail in fig. 1. Conducted interference below 1MHz is analyzed to be dominated by the differential mode component. In order to filter out the differential mode interference within 1MHz, a differential mode filter circuit is usually formed by connecting an X capacitor and a series differential mode inductor in parallel on an input live wire (L wire) and a zero wire (N wire). However, when a high-power and high-power-density switching power supply product is designed, a larger X capacitor and a larger differential mode inductor cannot be adopted due to the limited volume. And the differential mode inductance in the current switching power supply adopts a coil and a ferrite magnetic ring or a magnetic rod as an iron core in the middle of a winding, the iron core is saturated when the current passing through the coil is large, the differential mode inductance is similar to an air core coil without the iron core in the state, and further the differential mode inductance is reduced sharply, and the function of filtering differential mode interference is lost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a conducted interference filter circuit of a high-power switching power supply, which is used for solving the conduction problem of a high-power and high-power density switching power supply product and can effectively filter conducted interference below 1 MHz.
The utility model provides a high-power switching power supply conduction interference filter circuit, includes common mode inductance, still includes hollow coil, common mode inductance is toroidal inductance of common mode inductance, one side of common mode inductance sets up hollow coil, hollow coil is spiral hollow coil, just hollow coil's mesoporous axis with the axis of common mode inductance's toroidal core is coaxial or parallel, hollow coil with the common mode inductance circular telegram back, the magnetic field that hollow coil produced with common mode inductance's magnetic leakage interact, increase common mode inductance's magnetic leakage, with the increase common mode inductance's differential mode component, hollow coil with common mode inductance's magnetic leakage is virtual "magnetic core", the increase hollow coil's differential mode inductance volume.
When current flows through the hollow coil, a magnetic field is generated on the coil, and because the hollow coil is closer to the common-mode inductor, the magnetic field generated by the hollow coil interacts with the magnetic leakage of the common-mode inductor, the magnetic leakage of the common-mode inductor is increased, and the differential mode component of the common-mode inductor is further increased; and because the magnetic leakage of the common-mode inductor exists, the electrified hollow coil takes the magnetic leakage of the common-mode inductor as a magnetic core, and the differential mode inductance of the hollow coil is further increased. The above process is equivalent to that the hollow coil and the common-mode inductor after being electrified generate mutual inductance, and the mutual inductance type is a differential mode.
The invention also has the following preferred design:
the air core coil of the present invention may be a single wire wound coil.
The coil can also be a coil wound by device pins, or a coil wound by partial conducting wires of any one device of an X capacitor, a fuse and the common mode inductor.
The common mode inductor is a vertical common mode inductor or a horizontal common mode inductor. For the vertical common mode inductor, the hollow coil can be arranged in front of the common mode inductor and can also be arranged behind the common mode inductor; for the horizontal common mode inductor, the air core coil can be arranged above the common mode inductor and can also be arranged below the common mode inductor.
The coil of the common mode inductor can be a double wire wound on the annular magnetic core, and can also be separately and symmetrically wound on the annular magnetic core.
The invention has the beneficial effects that:
1. the conducted interference of a high-power switching power supply product can be effectively filtered, and particularly the differential mode interference below 1 MHz;
2. the circuit has simple structure, low cost, small volume and easy design.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 shows the CLASS B conducted interference limit in the CISPR32/EN55032 standard;
fig. 2 is a schematic diagram of a first embodiment of a conducted interference filter circuit of a high-power switching power supply according to the invention;
fig. 3 is a front view of a vertical common mode inductor, the coil of which is double-wound and parallel-wound;
fig. 4 is a side view of the vertical common mode inductor of fig. 3;
fig. 5 is a bottom view of the vertical common mode inductor of fig. 3;
fig. 6 is a front view of a vertical common mode inductor with separate windings;
fig. 7 is a schematic diagram of a second embodiment of a conducted interference filter circuit of a high power switching power supply according to the invention;
fig. 8 is a schematic diagram of a third embodiment of a conducted interference filter circuit of a high power switching power supply according to the present invention;
fig. 9 is a top view of a horizontal common mode inductor;
fig. 10 is a front view of the horizontal common mode inductor of fig. 9;
fig. 11 is a bottom view of the horizontal common mode inductor of fig. 9;
fig. 12 is a schematic diagram of a fourth embodiment of a conducted interference filter circuit of a high power switching power supply according to the present invention;
FIG. 13 is a waveform diagram of conducted interference test for a 1500W switching power supply product without the filter circuit of the present invention;
fig. 14 is a waveform diagram of conducted interference test of 1500W switching power supply products with the filter circuit of the present invention added.
Detailed Description
In order to make the invention more clearly understood, the invention is further described in detail below with reference to the attached drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First embodiment
As shown in fig. 2, a high-power switching power supply conducted interference filter circuit, including common mode inductance 1, still include hollow coil 2, common mode inductance 1 is the annular inductance of annular magnetic core, common mode inductance 1's one side sets up hollow coil 2, hollow coil 2 is spiral hollow coil, and the axis of the mesopore of hollow coil 2 is coaxial or parallel with the axis of the annular magnetic core of common mode inductance 1, behind hollow coil 2 and the circular inductance 1 circular telegram, the magnetic field that hollow coil 2 produced and the magnetic leakage interact of common mode inductance 1, increase common mode inductance 1's magnetic leakage, with increase common mode inductance 1's differential mode component, hollow coil 2 uses the magnetic leakage of common mode inductance 1 to be virtual "magnetic core", increase common mode inductance 2's differential mode inductance volume.
In this embodiment, as shown in fig. 3 to 5, the common mode inductor 1 is a vertical common mode inductor, and the two windings thereof are wound around the toroidal core, alternatively, the common mode inductor 1 may be an air-core winding with the windings separately and symmetrically wound around the toroidal core as shown in fig. 6. The air coil 2 is a single wire wound coil. An air coil 2 of the filter circuit is arranged in front of a common mode inductor 1, for example, the air coil 2 is arranged on the left side of the common mode inductor 1 in fig. 2, the common mode inductor 1 and the air coil 2 are connected in series on a product input line, a pin on one side of the common mode inductor 1 is used as an input end 3 of the filter circuit, and a pin on the other side of the common mode inductor 1 is used as an output end 4 of the filter circuit. After the product is electrified, a large input current flows through the hollow coil 2 to generate a magnetic field, and the generated magnetic field interacts with the magnetic leakage of the common-mode inductor 1, so that the magnetic leakage of the common-mode inductor 1 is increased, and the differential mode component of the common-mode inductor 1 is further increased; due to the existence of the leakage flux of the common mode inductor 1, the air-core coil 2 after being electrified takes the leakage flux of the common mode inductor 1 as an iron core, and the differential mode inductance of the air-core coil 2 is further increased. The above process is equivalent to that the hollow coil 2 after being electrified generates mutual inductance with the common-mode inductor 1, and the mutual inductance type is a differential mode.
Under the conditions of input 115Vac and output full load of 12V/125A, a CISPR32/EN55032CLASS B conduction test standard comparison test is adopted, the test product is a 1500W switching power supply, when a filter circuit of the circuit scheme is not added, a conduction disturbance test curve is shown in figure 10, and a conduction disturbance curve after the filter circuit of the circuit scheme is added is shown in figure 11. In fig. 10 and 11, the abscissa represents frequency (in MHz), and the ordinate represents the interference magnitude (in dB μ V). Comparing the quasi-peak curves in the frequency bands below 1MHz, it can be seen that the quasi-peak curves in fig. 10 exceed the Limit of Limit2 in the vicinity of the frequency points of 180kHz, 380kHz, 570kHz, 760kHz, and 950kHz, respectively, but the quasi-peak curves in fig. 11 are all below the Limit of Limit 2. Comparing the average curve of the frequency band below 1MHz, especially the curve near the frequency points of 180kHz and 380kHz, it can be seen that the curve margin of FIG. 11 is obviously better than that of FIG. 10. Therefore, the filter circuit of the circuit scheme of the invention can effectively filter the conducted interference below 1 MHz.
Second embodiment
As shown in fig. 7, the present embodiment is different from the first embodiment in that the filter circuit of the present embodiment has an air core coil 2 disposed at the right side of the common mode inductor 1, that is, the air core coil 2 is disposed at the rear of the vertical common mode inductor 1. The hollow coil 2 is formed by winding partial wires of an X capacitor and a fuse, and alternatively, the hollow coil 2 can also be formed by winding pins of other devices on a product. The common mode inductor 1 and the hollow coil 2 are connected in series on a product input line, a pin at one side of the common mode inductor 1 is used as an input end 3 of the filter circuit, a pin at the other side of the common mode inductor 1 is used as an output end 4 of the filter circuit, after the product is electrified, the working principle of the common mode inductor 1 and the hollow coil 2 is the same as that of the first embodiment, and differential mode inductance can be increased.
Third embodiment
As shown in fig. 8, the difference between this embodiment and the first embodiment is that the filter circuit of this embodiment uses a horizontal common mode inductor, and the coils of the horizontal common mode inductor are separately and symmetrically wound on a toroidal core, as shown in fig. 9 to 11. The hollow coil 2 is arranged above the common mode inductor 1, the hollow coil 2 is formed by winding partial leads of an X capacitor and a fuse, and as a replacement, the hollow coil 2 can also be formed by winding pins of other devices on a product. The common mode inductor 1 and the hollow coil 2 are connected in series on a product input line, a pin at one side of the common mode inductor 1 is used as an input end 3 of the filter circuit, a pin at the other side of the common mode inductor 1 is used as an output end 4 of the filter circuit, after the product is electrified, the working principle of the common mode inductor 1 and the hollow coil 2 is the same as that of the first embodiment, and differential mode inductance can be increased.
Fourth embodiment
As shown in fig. 12, the difference between the present embodiment and the third embodiment is that in the filter circuit of the present embodiment, the air-core coil 2 is below the horizontal common mode inductor 1, and the air-core coil 2 is formed by winding part of the conducting wire of the common mode inductor 1. The common mode inductor 1 and the hollow coil 2 are connected in series on a product input line, a pin at one side of the common mode inductor 1 is used as an input end 3 of the filter circuit, a pin at the other side of the common mode inductor 1 is used as an output end 4 of the filter circuit, after the product is electrified, the working principle of the common mode inductor 1 and the hollow coil 2 is the same as that of the third embodiment, and differential mode inductance can be increased.
In the invention, the relative distance and the relative position of the common mode inductor 1 and the air core coil 2 can be modulated according to requirements.
The above-mentioned embodiments are merely preferred embodiments of the present invention, but should not be construed as limiting the invention, and any variations and modifications based on the concept of the present invention should fall within the scope of the present invention, and the specific scope of the present invention is determined by the content of the claims.
Claims (6)
1. The utility model provides a high-power switching power supply conducted interference filter circuit, includes common mode inductance, its characterized in that: still include hollow coil, common mode inductance is annular magnetic core's annular inductance, common mode inductance's one side sets up hollow coil, hollow coil is spiral hollow coil, just hollow coil's mesoporous axis with common mode inductance's annular magnetic core's axis is coaxial or parallel, hollow coil with after common mode inductance circular telegram, the magnetic field that hollow coil produced with common mode inductance's magnetic leakage interact, the increase common mode inductance's magnetic leakage, in order to increase common mode inductance's differential mode component, hollow coil with common mode inductance's magnetic leakage is virtual "magnetic core", the increase hollow coil's differential mode inductance volume.
2. The conducted interference filter circuit of a high power switching power supply according to claim 1, wherein: the hollow coil is a coil wound by a single lead.
3. The conducted interference filter circuit of the high power switching power supply according to claim 1, wherein: the hollow coil is a coil wound by device pins.
4. The conducted interference filter circuit of the high power switching power supply according to claim 1, wherein: the hollow coil is a coil wound by partial conducting wires of any one of an X capacitor, a fuse and the common mode inductor.
5. The conducted interference filter circuit of the high-power switching power supply according to any one of claims 1 to 4, wherein: the common mode inductor is a vertical common mode inductor or a horizontal common mode inductor.
6. The conducted interference filter circuit of high power switch power supply as claimed in claim 5, wherein: the coil of the common mode inductor is wound on the annular magnetic core in a double-wire mode, or the coil of the common mode inductor is wound on the annular magnetic core in a split and symmetrical mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211309031.6A CN115664193A (en) | 2022-10-25 | 2022-10-25 | High-power switching power supply conducted interference filter circuit |
| PCT/CN2023/096764 WO2024087616A1 (en) | 2022-10-25 | 2023-05-29 | Conduction-interference filter circuit for high-power switch power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211309031.6A CN115664193A (en) | 2022-10-25 | 2022-10-25 | High-power switching power supply conducted interference filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115664193A true CN115664193A (en) | 2023-01-31 |
Family
ID=84991729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211309031.6A Pending CN115664193A (en) | 2022-10-25 | 2022-10-25 | High-power switching power supply conducted interference filter circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115664193A (en) |
| WO (1) | WO2024087616A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087616A1 (en) * | 2022-10-25 | 2024-05-02 | 广州金升阳科技有限公司 | Conduction-interference filter circuit for high-power switch power source |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2566527Y2 (en) * | 1993-12-29 | 1998-03-30 | 日本無線株式会社 | Hybrid inductor device |
| JP2001167935A (en) * | 1999-12-08 | 2001-06-22 | Matsushita Electric Ind Co Ltd | Choke coil |
| CN102307043B (en) * | 2011-05-04 | 2014-02-19 | 南京航空航天大学 | High-performance integrated electromagnetic interference (EMI) filter |
| CN102856036B (en) * | 2011-06-30 | 2016-02-10 | 艾默生网络能源有限公司 | A kind of difference common mode integrated inductor, electromagnetic interface filter and Switching Power Supply |
| CN115664193A (en) * | 2022-10-25 | 2023-01-31 | 广州金升阳科技有限公司 | High-power switching power supply conducted interference filter circuit |
-
2022
- 2022-10-25 CN CN202211309031.6A patent/CN115664193A/en active Pending
-
2023
- 2023-05-29 WO PCT/CN2023/096764 patent/WO2024087616A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087616A1 (en) * | 2022-10-25 | 2024-05-02 | 广州金升阳科技有限公司 | Conduction-interference filter circuit for high-power switch power source |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024087616A1 (en) | 2024-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115664193A (en) | High-power switching power supply conducted interference filter circuit | |
| CN104539148A (en) | Filter circuit and device | |
| CN203554278U (en) | A household electrical appliance and an EMI filter circuit thereof | |
| CN109920620B (en) | Common mode choke coil for eliminating electrostatic interference | |
| CN207503796U (en) | A kind of differential mode magnetic integrated inductor altogether | |
| CN103701427B (en) | For improving the household electrical appliance external front end filter of Homeplug power spectral density | |
| CN103474210A (en) | Transformer resistant to common code interference | |
| CN202275686U (en) | Common mode inductor, common mode filter and switching mode power supply electromagnetic compatibility circuit | |
| CN203118703U (en) | Common mode choke for improving common-mode radiation interference | |
| CN212992292U (en) | Filter circuit for high-voltage direct current input | |
| CN205159081U (en) | Novel anti interference current mutual -inductor | |
| CN210578435U (en) | Anti-noise optimization circuit for partial discharge signal of switch cabinet | |
| CN210490474U (en) | Design circuit of three-phase four-wire general filter | |
| CN209072338U (en) | Three-level anti-jamming circuit | |
| CN207489659U (en) | Integrated filter inductance transformer based on circuit coupled method | |
| CN103035361A (en) | Common mode inductor | |
| KR102589292B1 (en) | Electromagnetic Interference Filter | |
| CN216412818U (en) | Sinking type inductance structure | |
| CN201638667U (en) | Anti-resonant voltage transformer | |
| CN110896299A (en) | Anti-noise optimization circuit for partial discharge signal of switch cabinet | |
| CN103021628B (en) | A kind of common mode inductance, common-mode filter and Switching Power Supply electromagnetism compatible circuit | |
| CN211742822U (en) | Differential-common mode integrated inductor structure | |
| CN212990881U (en) | From switching power supply transformer of taking EMI to restrain magnetic bead | |
| CN210778228U (en) | Three-phase common mode inductor and switching power supply | |
| CN210667963U (en) | Common mode inductor with differential mode effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |