CN110474525A - Charging unit including silicon carbide charging module - Google Patents
Charging unit including silicon carbide charging module Download PDFInfo
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- CN110474525A CN110474525A CN201910775377.7A CN201910775377A CN110474525A CN 110474525 A CN110474525 A CN 110474525A CN 201910775377 A CN201910775377 A CN 201910775377A CN 110474525 A CN110474525 A CN 110474525A
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 74
- 230000005611 electricity Effects 0.000 claims description 21
- 230000000694 effects Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 235000013399 edible fruits Nutrition 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- BNPSSFBOAGDEEL-UHFFFAOYSA-N albuterol sulfate Chemical compound OS(O)(=O)=O.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1 BNPSSFBOAGDEEL-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009466 transformation Effects 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Filters And Equalizers (AREA)
Abstract
This application provides a kind of charging units including silicon carbide charging module, including sequentially connected charging equipment, filter and power-supply device, wherein, filter includes at least two cascade filter units, the filtering frequency range of any two filter unit is different, and charging equipment is silicon carbide charging module.It include at least two filter units in the filter of above-mentioned charging unit, and the filtering frequency range of different filter units is different, the filter can at least filter out the electromagnetic interference of two different frequency ranges in this way, so that the filter effect of the filter is preferable, and then ensure that the filter effect of the charging unit is preferable, to reduce its electromagnetic interference to the external world of charging unit.
Description
Technical field
This application involves electromagnetic arts, in particular to a kind of charging unit including silicon carbide charging module.
Background technique
The technical problem to be solved by the present invention is to how wide frequency domain, significantly, flexible configuration electromagnetic compatibility filter parameter,
Effectively inhibit silicon carbide charging module to extraneous electromagnetic interference.
Silicon carbide charging module accesses power grid, charges after rectification for electric car.Silicon carbide charging module has Gao Gong
Rate density, high efficiency, feature resistant to high temperature.However, compared to traditional silicon device, silicon carbide device switching frequency is high, and electricity
Buckling rate is big, and therefore, silicon carbide charging module has bigger interference to power grid, and EMC Design difficulty is big.
Power supply mould group generate Conducted Electromagnetic Interference (abbreviation Conduction Interference) will affect around other electronic devices it is effective
It works, needs electromagnetic interference (EMI) filter in power supply mould group, prevent power supply mould group to extraneous Conduction Interference.Below from electricity
Carry out dielectric magnetic disturbance in terms of magnetic disturbance source, electromagnetic interference frequency distribution, traditional suppressing method three.
In terms of electromagnetic interference source, power semiconductor is the important composition component of power supply mould group, and switch motion is real
Power supply mould group input/output port different form, different grades of transformation of electrical energy are showed, however, the switch of power semiconductor
Movement becomes the important sources of Conduction Interference.Silicon carbide device is third generation power semiconductor, carbofrax material and mesh
Before should extensive silicon materials compare, higher thermal conductivity determines the characteristic of its high current density, and higher forbidden bandwidth is again
Determine the high breakdown field strength and elevated operating temperature of silicon carbide device.Therefore, sic semiconductor device, which has, is lost low, switch
Fireballing feature can reduce power modules loss, volume and weight, have broad application prospects.However, too fast opens
Pass movement, which lacks, introduces excessive electromagnetic interference, and the interference occurs in wider band limits, inhibits difficulty big.
The interfering frequency of electromagnetic interference is distributed aspect, and Conduction Interference is divided into common mode interference and DM EMI two parts, is passing
It leads in harassing and wrecking test, common mode interference can generate the noise of higher frequency band, and DM EMI can then generate the noise compared with low-frequency range, altogether
The noise of mould interference and DM EMI joint effect Mid Frequency.However, the front stage switching frequency of silicon carbide charging module is different,
The frequency distribution situation of common mode interference and DM EMI is increasingly complex.
The device of traditional inhibition electromagnetic interference, it is predominantly common by coupling inductance, x capacitor, y capacitor and discharge resistance
EMI FILTER is constituted, as shown in Figure 1.The type EMI FILTER is suitable for traditional silicon reference power supply mould group, to new
The electromagnetic interference inhibitory effect of type silicon carbide power mould group is limited.
Existing others EMI FILTER noise suppressed frequency range is narrow, amplitude is small, can not be to the conduction of each frequency range
Interference separately designs parameter and flexibly inhibits, and the interference that cannot be generated to silicon carbide device is effectively inhibited.
Disclosed information above is used only to reinforce the background technique to technology described herein in the background section
Understanding may include therefore certain information in background technique, these information are to those skilled in the art and not formed
The home known prior art.
Summary of the invention
The main purpose of the application is to provide a kind of charging unit including silicon carbide charging module, to solve existing skill
The poor problem of the filter effect of filter in art in charging unit.
To achieve the goals above, according to the one aspect of the application, a kind of charging unit is provided, including is sequentially connected
Charging equipment, filter and power-supply device, wherein the filter include at least two cascade filter units, arbitrarily
The filtering frequency range of two filter units is different.
Further, there are three the filter units, respectively the first filter unit, the second filter unit and third filter
Wave unit, the third filter unit, second filter unit and first filter unit are set along far from the charging
Standby direction is sequentially connected in series, and the filtering frequency range of first filter unit, the filtering frequency range of second filter unit and
The corresponding frequency of filtering frequency range of the third filter unit successively increases.
Further, the power-supply device has the first output end and second output terminal, and the charging equipment has first
Input terminal and the second input terminal, are connected with first line between the first input end and first output end, and described second
The second route, the part-structure of each filter unit of the filter are connected between input terminal and the second output terminal
It is arranged in the first line and second route.
Further, first filter unit includes the first common mode inductance, the first differential mode capacitor and the first common mode capacitance.
Further, first filter unit further includes ground wire, and first common mode inductance includes the first inductance and the
Two inductance, there are two first differential mode capacitors, and there are four first common mode capacitances, respectively first the first common mode electricity
Hold, second the first common mode capacitance, third the first common mode capacitance and the 4th the first common mode capacitance, wherein described first
Inductance is arranged in the first line, and on the second line are each, two first differential modes are electric for the second inductance setting
One in appearance is connected between the first tie point and the second tie point, another is connected to third tie point and the 4th tie point
Between, first tie point is the portion between the first capacitor and first output end in the first line
Point, second tie point is the part between second capacitor and the second output terminal of the two wires road,
The third tie point is the part between the first capacitor and the first input end in the first line, institute
State the part between second capacitor and second input terminal that the 4th tie point is the two wires road, described the
One the first common mode capacitance is connected between the 5th tie point and ground wire, the 5th tie point be located at first output end and
In the first line between first tie point, second first common mode capacitance is connected to second tie point
Between the ground wire, the first common mode capacitance of the third is connected between the 6th tie point and the ground wire, and the described 6th
For tie point in the first line between the first input end and the third tie point, described 4th first total
For mould capacitance connection between the 7th tie point and the ground wire, the 7th tie point is on second route positioned at described
Part between 4th tie point and second input terminal.
Further, second filter unit includes the second common mode inductance, the second differential mode capacitor and the second common mode capacitance.
Further, second filter unit further includes ground wire, and second common mode inductance includes third inductance and
Four inductance, there are two second differential mode capacitors, and there are four second common mode capacitances, respectively first the second common mode electricity
Hold, second the second common mode capacitance, third the second common mode capacitance and the 4th the second common mode capacitance, wherein the third
Inductance is arranged in the first line, and on the second line are each, two second differential modes are electric for the 4th inductance setting
One in appearance is connected between the 8th tie point and the 9th tie point, another is connected to the tenth tie point and the 11st connection
Point between, the 8th tie point be the first line between the first capacitor and first output end
Part, the 9th tie point are the portion between second capacitor and the second output terminal of the two wires road
Point, the tenth tie point is the portion between the first capacitor and the first input end in the first line
Point, the 11st tie point is the portion between second capacitor and second input terminal of the two wires road
Point, first second common mode capacitance is connected between the 12nd tie point and ground wire, and the 12nd tie point is located at institute
It states in the first line between the first output end and the 8th tie point, second second common mode capacitance is connected to
Between 9th tie point and the ground wire, the third the second common mode capacitance is connected to the 13rd tie point and described
Between line, the first line of the 13rd tie point between the first input end and the tenth tie point
On, the 4th second common mode capacitance is connected between the 14th tie point and the ground wire, and the 14th tie point is
The part between the 11st tie point and second input terminal on second route.
Further, the third filter unit includes third common mode inductance, third differential mode capacitor and third common mode capacitance.
Further, the third filter unit further includes ground wire, and the third common mode inductance includes the 5th inductance and the
Six inductance, there are two the third differential mode capacitors, and there are four the third common mode capacitances, respectively first third common mode electricity
Hold, second third common mode capacitance, third third common mode capacitance and the 4th third common mode capacitance, wherein the described 5th
Inductance is arranged in the first line, and on the second line are each, two third differential modes are electric for the 6th inductance setting
One in appearance is connected between the 15th tie point and the 16th tie point, another is connected to the 17th tie point and the tenth
Between eight tie points, the 15th tie point is to be located at the first capacitor and first output in the first line
Part between end, the 16th tie point are the two wires road positioned at second capacitor and the second output terminal
Between part, the 17th tie point be the first line on be located at the first capacitor and the first input end
Between part, the 18th tie point be the two wires road be located at second capacitor and second input terminal it
Between part, first third common mode capacitance be connected between the 19th tie point and ground wire, the 19th tie point
In the first line between first output end and the 15th tie point, second third common mode electricity
Appearance is connected between the 16th tie point and the ground wire, and the third third common mode capacitance is connected to the 20th connection
Between point and the ground wire, institute of the 20th tie point between the first input end and the 17th tie point
It states in first line, the 4th third common mode capacitance is connected between the 21st tie point and the ground wire, and described
21 tie points are the part between the 18th tie point and second input terminal on second route.
Further, the filtering frequency range of first filter unit is between 150K~1MHz, second filter unit
Filtering frequency range between 1M~10MHz, the filtering frequency range of the third filter unit is between 10MHz~30MHz.
It include at least two filter units in the filter of above-mentioned charging unit, and not using the technical solution of the application
The filtering frequency range of same filter unit is different, and the filter can at least filter out the electromagnetic interference of two different frequency ranges in this way, from
And make the filter effect of the filter preferable, and then ensure that the filter effect of the charging unit is preferable, to reduce charging
Its electromagnetic interference to the external world of device.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the embodiment of the charging unit according to the application；And
Fig. 2 shows the Electro Magnetic Compatibility test charts of the charging unit of embodiment.
Wherein, the above drawings include the following reference numerals:
10, charging equipment；20, filter；11, first input end；12, the second input terminal；21, the first filter unit；22,
Second filter unit；23, third filter unit；31, the first output end；32, second output terminal；Cc1, first the first common mode electricity
Hold；Cc2, second the first common mode capacitance；Cc3, third the first common mode capacitance；Cc4, the 4th the first common mode capacitance；Cc5, first
A second common mode capacitance；Cc6, second the second common mode capacitance；Cc7, third the second common mode capacitance；Cc8, the 4th the second common mode
Capacitor；Cc9, first third common mode capacitance；Cc10, second third common mode capacitance；Cc11, third third common mode capacitance；Cc12、
4th third common mode capacitance；Cd1, first the first differential mode capacitor；Cd2, second the first differential mode capacitor；Cd3, first second
Differential mode capacitor；Cd4, second the second differential mode capacitor；Cd5, first third differential mode capacitor；Cd6, second third differential mode capacitor；
L1, the first inductance；L2, the second inductance；L3, third inductance；L4, the 4th inductance；L5, the 5th inductance；L6, the 6th inductance.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
It should be understood that when element (such as layer, film, region or substrate) is described as at another element "upper", this yuan
Part can be directly on another element, or intermediary element also may be present.Moreover, in specification and claims, when
When description has element " connected " to another element, which " can be directly connected to " to another element, or pass through third element
" connected " to another element.
As background technique is introduced, the filter effect of the filter in charging unit in the prior art is poor, is
Solution technical problem as above, present applicant proposes a kind of charging unit including silicon carbide charging module.
In a kind of typical embodiment of the application, a kind of charging unit including silicon carbide charging module is provided,
As shown in Figure 1, the charging unit includes that sequentially connected charging equipment 10, filter 20 and power-supply device (do not show in figure
Out), wherein above-mentioned filter 20 includes at least two cascade filter units, the filtering frequency of the above-mentioned filter unit of any two
Duan Butong, charging equipment are silicon carbide charging module.Three filter units are shown in Fig. 1.
It include at least two filter units in the filter 20 of above-mentioned charging unit, and the filtering of different filter units is frequently
Duan Butong, the in this way filter 20 can at least filter out the electromagnetic interference of two different frequency ranges, so that the filter 20
Filter effect is preferable, and then ensure that the filter effect of the charging unit is preferable, to reduce its electricity to the external world of charging unit
Magnetic disturbance.
The filter 20 of the application is located between the interference source and power-supply device of charging equipment 10, and high-frequency current is come
It says, which is equivalent to one big impedance of addition on high-frequency current circuit, and between power end and ground wire PE
Form low impedance path.The switching tube high-frequency work of switching tube and rear class interference source in the prime interference source of charging equipment 10
When, the high-frequency current for flowing through stray capacitance is reduced, to restrain the interference electric current of outflow charging unit.
In order to further increase the filter effect of the filter 20, in a kind of embodiment of the application, as shown in Figure 1, on
It states there are three filter units, respectively the first filter unit 21, the second filter unit 22 and third filter unit 23, above-mentioned
Three filter units 23, above-mentioned second filter unit 22 and above-mentioned first filter unit 21 are along the side far from above-mentioned charging equipment 10
To being sequentially connected in series, and the filtering frequency range of above-mentioned first filter unit 21, the filtering frequency range of above-mentioned second filter unit 22 and on
The corresponding frequency of filtering frequency range for stating third filter unit 23 successively increases.The filter 20 can be to three different frequency ranges in this way
Electromagnetic interference filtered out, be further reduced the charging unit to extraneous electromagnetic interference, and the maximum third of rejection frequency
Distance of the filter unit 23 apart from electromagnetic interference source (charging equipment 10) is minimum, can effective filter out the electromagnetic interference of high frequency,
It may further ensure that the filter 20 has preferable filter effect in this way.
Certainly, the quantity of the filter unit in the filter 20 in the application is not limited to above-mentioned three, can also be
Any amount more than or equal to two, those skilled in the art can select any appropriate number of filter according to the actual situation
Wave unit.
In one of the application specific embodiment, above-mentioned power-supply device has the first output end 31 and second output terminal
32, above-mentioned charging equipment 10 has first input end 11 and the second input terminal 12, above-mentioned first input end 11 and above-mentioned first defeated
It is connected with first line between outlet 31, is connected with the second line between above-mentioned second input terminal 12 and above-mentioned second output terminal 32
The part-structure on road, each above-mentioned filter unit of above-mentioned filter 20 is arranged in above-mentioned first line and above-mentioned second route.
Such filter 20 it is relatively simple for structure.
The specific structure of the first filter unit 21 of the application, the second filter unit 22 and third filter unit 23 can be with
It designs according to the actual situation, specifically, the frequency for the electromagnetic interference that those skilled in the art can generate according to charging equipment 10
Section designs the structure of each filter unit, can be with as long as the structure of the electromagnetic interference of corresponding frequency band can be filtered out.
In a kind of specific embodiment of the application, as shown in Figure 1, above-mentioned first filter unit 21 includes the first common mode electricity
Sense, the first differential mode capacitor and the first common mode capacitance.
Specifically, above-mentioned first filter unit 21 further includes ground wire, and above-mentioned first common mode inductance includes the first inductance L1With
Second inductance L2, there are two above-mentioned first differential mode capacitors, respectively first the first differential mode capacitor Cd1With second the first differential mode
Capacitor Cd2, there are four above-mentioned first common mode capacitances, respectively first the first common mode capacitance Cc1, second the first common mode capacitance
Cc2, third the first common mode capacitance Cc3And the 4th the first common mode capacitance Cc4, in which:
Above-mentioned first inductance L1It is arranged in above-mentioned first line, above-mentioned second inductance L2It is arranged on above-mentioned second route,
One in two above-mentioned first differential mode capacitors is connected between the first tie point and the second tie point, another company
It connects between third tie point and the 4th tie point, above-mentioned first tie point is to be located at above-mentioned first electricity in above-mentioned first line
Hold and is located at above-mentioned second capacitor the part between above-mentioned first output end 31, above-mentioned second tie point for above-mentioned two wires road
Part between above-mentioned second output terminal 32, above-mentioned third tie point are to be located at above-mentioned first capacitor in above-mentioned first line
Part between above-mentioned first input end 11, above-mentioned 4th tie point be above-mentioned two wires road be located at above-mentioned second capacitor and
Part between above-mentioned second input terminal 12,
Above-mentioned first the first common mode capacitance Cc1It is connected between the 5th tie point and ground wire, above-mentioned 5th tie point is located at
In above-mentioned first line between above-mentioned first output end 31 and above-mentioned first tie point, above-mentioned second the first common mode capacitance Cc2
It is connected between above-mentioned second tie point and above-mentioned ground wire, the first common mode capacitance C of above-mentioned thirdc3Be connected to the 6th tie point and
Between above-mentioned ground wire, above-mentioned 6th tie point between above-mentioned first input end 11 and above-mentioned third tie point above-mentioned first
On route, above-mentioned 4th the first common mode capacitance Cc4It is connected between the 7th tie point and above-mentioned ground wire, above-mentioned 7th tie point
For the part between above-mentioned 4th tie point and above-mentioned second input terminal 12 on above-mentioned second route.
In the first above-mentioned filter unit 21, the leakage inductance of the first common mode inductance generates the first differential mode inductance, the first differential mode electricity
Sense (i.e. the leakage inductance of common mode inductance) and the first differential mode capacitor collectively constitute more π type cascade filtering structures, and amplitude-frequency characteristic turns being greater than
The part of frequency is rolled over, with the velocity attenuation of -60dB/dec, the interior DM EMI of decaying frequency range is imitated with extremely strong inhibition
Fruit.First common mode inductance and four the first common mode capacitance (Cc1-Cc4), it is dry for the common mode of the low-frequency disturbance source excitation of prime
It disturbs and is inhibited.
In another embodiment of the application, above-mentioned second filter unit 22 includes the second common mode inductance, the second differential mode electricity
Hold and the second common mode capacitance.
Specifically, above-mentioned second filter unit 22 further includes ground wire, and above-mentioned second common mode inductance includes third inductance L3With
4th inductance L4, there are two above-mentioned second differential mode capacitors, respectively first the second differential mode capacitor Cd3With second the second differential mode
Capacitor Cd4, there are four above-mentioned second common mode capacitances, respectively first the second common mode capacitance Cc5, second the second common mode capacitance
Cc6, third the second common mode capacitance Cc7And the 4th the second common mode capacitance Cc8, in which:
Above-mentioned third inductance L3It is arranged in above-mentioned first line, above-mentioned 4th inductance L4It is arranged on above-mentioned second route,
One in two above-mentioned second differential mode capacitors is connected between the 8th tie point and the 9th tie point, another company
It connects between the tenth tie point and the 11st tie point, above-mentioned 8th tie point is to be located at above-mentioned first in above-mentioned first line
Part between capacitor and above-mentioned first output end 31, above-mentioned 9th tie point are above-mentioned two wires road positioned at above-mentioned second electricity
Hold the part between above-mentioned second output terminal 32, above-mentioned tenth tie point is to be located at above-mentioned first electricity in above-mentioned first line
Hold and is located at above-mentioned second electricity the part between above-mentioned first input end 11, above-mentioned 11st tie point for above-mentioned two wires road
Hold the part between above-mentioned second input terminal 12,
Above-mentioned first the second common mode capacitance Cc5It is connected between the 12nd tie point and ground wire, above-mentioned 12nd tie point
In above-mentioned first line between above-mentioned first output end 31 and above-mentioned 8th tie point, above-mentioned second the second common mode electricity
Hold Cc6It is connected between above-mentioned 9th tie point and above-mentioned ground wire, the second common mode capacitance C of above-mentioned thirdc7It is connected to the 13rd
Between tie point and above-mentioned ground wire, above-mentioned 13rd tie point is between above-mentioned first input end 11 and above-mentioned tenth tie point
Above-mentioned first line on, above-mentioned 4th the second common mode capacitance Cc8It is connected between the 14th tie point and above-mentioned ground wire, on
State the 14th tie point be above-mentioned second route between above-mentioned 11st tie point and above-mentioned second input terminal 12
Part.
In the second above-mentioned filter unit 22, the leakage inductance of the second common mode inductance generates the second differential mode inductance, the second differential mode electricity
Sense (i.e. the leakage inductance of common mode inductance) and the second differential mode capacitor collectively constitute more π type cascade filtering structures, and amplitude-frequency characteristic turns being greater than
The part of frequency is rolled over, with the velocity attenuation of -60dB/dec, the interior DM EMI of decaying frequency range is imitated with extremely strong inhibition
Fruit.One the second common mode inductance and four the second common mode capacitance (Cc5-Cc8), excited for front stage interference source reciprocal effect
Common mode interference inhibited.
In the another embodiment of the application, as shown in Figure 1, above-mentioned third filter unit 23 include third common mode inductance,
Third differential mode capacitor and third common mode capacitance.
Above-mentioned third filter unit 23 further includes ground wire, and above-mentioned third common mode inductance includes the 5th inductance L5With the 6th inductance
L6, there are two above-mentioned third differential mode capacitors, respectively first third differential mode capacitor Cd5With second third differential mode capacitor Cd6, on
It states there are four third common mode capacitances, respectively first third common mode capacitance Cc9, second third common mode capacitance Cc10, third
Third common mode capacitance Cc11And the 4th third common mode capacitance Cc12, in which:
Above-mentioned 5th inductance L5It is arranged in above-mentioned first line, above-mentioned 6th inductance L6It is arranged on above-mentioned second route,
One in two above-mentioned third differential mode capacitors is connected between the 15th tie point and the 16th tie point, another
A to be connected between the 17th tie point and the 18th tie point, above-mentioned 15th tie point is being located in above-mentioned first line
Part between above-mentioned first capacitor and above-mentioned first output end 31, above-mentioned 16th tie point are being located at for above-mentioned two wires road
Part between above-mentioned second capacitor and above-mentioned second output terminal 32, above-mentioned 17th tie point are the position in above-mentioned first line
Part between above-mentioned first capacitor and above-mentioned first input end 11, above-mentioned 18th tie point are the position of above-mentioned two wires road
Part between above-mentioned second capacitor and above-mentioned second input terminal 12,
Above-mentioned first third common mode capacitance Cc9It is connected between the 19th tie point and ground wire, above-mentioned 19th tie point
In above-mentioned first line between above-mentioned first output end 31 and above-mentioned 15th tie point, above-mentioned second third common mode
Capacitor Cc10It is connected between above-mentioned 16th tie point and above-mentioned ground wire, above-mentioned third third common mode capacitance Cc11It is connected to
Between 20 tie points and above-mentioned ground wire, above-mentioned 20th tie point is located at above-mentioned first input end 11 and above-mentioned 17th connection
In above-mentioned first line between point, above-mentioned 4th third common mode capacitance Cc12It is connected to the 21st tie point and above-mentioned
Between line, above-mentioned 21st tie point is to be located at above-mentioned 18th tie point and above-mentioned second input on above-mentioned second route
Part between end 12.
In above-mentioned third filter unit 23, the leakage inductance of third common mode inductance generates third differential mode inductance, third differential mode electricity
Sense (i.e. the leakage inductance of common mode inductance) and third differential mode capacitor collectively constitute more π type cascade filtering structures, and amplitude-frequency characteristic turns being greater than
The part of frequency is rolled over, with the velocity attenuation of -60dB/dec, the interior DM EMI of decaying frequency range is imitated with extremely strong inhibition
Fruit.Third common mode inductance and four third common mode capacitance (Cc9-Cc12), it is dry for the common mode of the High-frequency Interference source excitation of rear class
It disturbs and is inhibited.
It should be noted that the structure of each filter unit in the application is not limited to above-mentioned during useful application
Structure, can also according to Conduction Interference test spectrum distribution situation, relevant parameter and structure be adjusted flexibly, avoid complexity
Parameter and Structure Calculation save time cost.
In a kind of specific embodiment, the filtering frequency range of above-mentioned first filter unit 21 is above-mentioned between 150K~1MHz
The filtering frequency range of second filter unit 22 between 1M~10MHz, the filtering frequency range of above-mentioned third filter unit 23 10MHz~
Between 30MHz.The electromagnetic interference that the filter 20 can generate silicon carbide charging equipment 10 in this way effectively inhibits.
It should be noted that include two parts in charging equipment in Fig. 1, before being closer with third filter unit and being
Grade interference source is relatively far away from rear class interference source with third filter unit distance.Also, the PE in Fig. 1 is ground wire.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The embodiment of body illustrates.
Embodiment
The charging unit is made of charging equipment 10, filter 20 and power-supply device, and the structure in each equipment is specific
As shown in Figure 1, charging equipment is silicon carbide charging module, also, in addition to the structure in figure in the filter 20, without others
Structure.
The Electromagnetic Compatibility of the charging unit is tested, test results are shown in figure 2, from this figure, it can be seen that
The Electromagnetic Compatibility of the charging unit has reached the corresponding standard of dotted line.
It can be seen from the above description that the application the above embodiments realize following technical effect:
It include at least two filter units in the filter of the charging unit including silicon carbide charging module of the application, and
The filtering frequency range of different filter units is different, and the filter can at least filter out the electromagnetic interference of two different frequency ranges in this way,
So that the filter effect of the filter is preferable, and then ensure that the filter effect of the charging unit is preferable, filled to reduce
Its electromagnetic interference to the external world of electric installation.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of charging unit including silicon carbide charging module, which is characterized in that including sequentially connected charging equipment, filtering
Device and power-supply device, wherein the filter includes at least two cascade filter units, filter unit described in any two
Filtering frequency range it is different, the charging equipment is silicon carbide charging module.
2. charging unit according to claim 1, which is characterized in that there are three the filter units, the respectively first filter
Wave unit, the second filter unit and third filter unit, the third filter unit, second filter unit and described
First filter unit is sequentially connected in series along the direction far from the charging equipment, and the filtering frequency range of first filter unit, institute
The filtering frequency range of the filtering frequency range and the third filter unit of stating the second filter unit is different and successively increases.
3. charging unit according to claim 2, which is characterized in that the power-supply device has the first output end and second
Output end, the charging equipment have first input end and the second input terminal, the first input end and first output end
Between be connected with first line, the second route, the filtering are connected between second input terminal and the second output terminal
The part-structure of each filter unit of device is arranged in the first line and second route.
4. charging unit according to claim 3, which is characterized in that first filter unit includes the first common mode electricity
Sense, the first differential mode capacitor and the first common mode capacitance.
5. charging unit according to claim 4, which is characterized in that first filter unit further includes ground wire, described
First common mode inductance includes the first inductance and the second inductance, and there are two first differential mode capacitors, and first common mode capacitance has
Four, respectively first the first common mode capacitance, second the first common mode capacitance, third the first common mode capacitance and the 4th
First common mode capacitance, wherein
First inductance is arranged in the first line, and second inductance is arranged on the second line are each,
One in two first differential mode capacitors is connected between the first tie point and the second tie point, another is connected to
Between third tie point and the 4th tie point, first tie point be the first line on be located at the first capacitor and
Part between first output end, second tie point are that the two wires road is located at second capacitor and described
Part between second output terminal, the third tie point are to be located at the first capacitor and described the in the first line
Part between one input terminal, the 4th tie point are that the two wires road is located at second capacitor and described second defeated
Enter the part between end,
First first common mode capacitance is connected between the 5th tie point and ground wire, and the 5th tie point is located at described the
In the first line between one output end and first tie point, second first common mode capacitance is connected to described
Between second tie point and the ground wire, the third the first common mode capacitance be connected to the 6th tie point and the ground wire it
Between, the 6th tie point is described in the first line between the first input end and the third tie point
4th the first common mode capacitance is connected between the 7th tie point and the ground wire, and the 7th tie point is second route
On the part between the 4th tie point and second input terminal.
6. charging unit according to claim 5, which is characterized in that second filter unit includes the second common mode electricity
Sense, the second differential mode capacitor and the second common mode capacitance.
7. charging unit according to claim 6, which is characterized in that second filter unit further includes ground wire, described
Second common mode inductance includes third inductance and the 4th inductance, and there are two second differential mode capacitors, and second common mode capacitance has
Four, respectively first the second common mode capacitance, second the second common mode capacitance, third the second common mode capacitance and the 4th
Second common mode capacitance, wherein
The third inductance is arranged in the first line, and the 4th inductance is arranged on the second line are each,
One in two second differential mode capacitors is connected between the 8th tie point and the 9th tie point, another is connected to
Between tenth tie point and the 11st tie point, the 8th tie point is to be located at the first capacitor in the first line
Part between first output end, the 9th tie point are located at second capacitor and institute for the two wires road
State the part between second output terminal, the tenth tie point is to be located at the first capacitor and described in the first line
Part between first input end, the 11st tie point are that the two wires road is located at second capacitor and described the
Part between two input terminals,
First second common mode capacitance is connected between the 12nd tie point and ground wire, and the 12nd tie point is located at institute
It states in the first line between the first output end and the 8th tie point, second second common mode capacitance is connected to
Between 9th tie point and the ground wire, the third the second common mode capacitance is connected to the 13rd tie point and described
Between line, the first line of the 13rd tie point between the first input end and the tenth tie point
On, the 4th second common mode capacitance is connected between the 14th tie point and the ground wire, and the 14th tie point is
The part between the 11st tie point and second input terminal on second route.
8. charging unit according to claim 7, which is characterized in that the third filter unit includes third common mode electricity
Sense, third differential mode capacitor and third common mode capacitance.
9. charging unit according to claim 8, which is characterized in that the third filter unit further includes ground wire, described
Third common mode inductance includes the 5th inductance and the 6th inductance, and there are two the third differential mode capacitors, and the third common mode capacitance has
Four, respectively first third common mode capacitance, second third common mode capacitance, third third common mode capacitance and the 4th
Third common mode capacitance, wherein
5th inductance is arranged in the first line, and the 6th inductance is arranged on the second line are each,
One in two third differential mode capacitors is connected between the 15th tie point and the 16th tie point, another company
It connects between the 17th tie point and the 18th tie point, the 15th tie point is in the first line positioned at described
Part between first capacitor and first output end, the 16th tie point are that the two wires road is located at described the
Part between two capacitors and the second output terminal, the 17th tie point are to be located at described the in the first line
Part between one capacitor and the first input end, the 18th tie point are the two wires road positioned at described second
Part between capacitor and second input terminal,
First third common mode capacitance is connected between the 19th tie point and ground wire, and the 19th tie point is located at institute
It states in the first line between the first output end and the 15th tie point, second third common mode capacitance connection
Between the 16th tie point and the ground wire, the third third common mode capacitance is connected to the 20th tie point and institute
State between ground wire, the 20th tie point between the first input end and the 17th tie point described first
On route, the 4th third common mode capacitance is connected between the 21st tie point and the ground wire, and the described 21st
Tie point is the part between the 18th tie point and second input terminal on second route.
10. charging unit according to any one of claim 1 to 9, which is characterized in that the filter of first filter unit
Wave frequency section is between 150K~1MHz, and the filtering frequency range of second filter unit is between 1M~10MHz, the third filtering
The filtering frequency range of unit is between 10MHz~30MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775377.7A CN110474525A (en) | 2019-08-21 | 2019-08-21 | Charging unit including silicon carbide charging module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775377.7A CN110474525A (en) | 2019-08-21 | 2019-08-21 | Charging unit including silicon carbide charging module |
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| CN110474525A true CN110474525A (en) | 2019-11-19 |
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| CN201910775377.7A Pending CN110474525A (en) | 2019-08-21 | 2019-08-21 | Charging unit including silicon carbide charging module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225037A (en) * | 2021-03-26 | 2021-08-06 | 洛坦电子科技(上海)有限公司 | Filter for silicon carbide high-frequency controller |
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