CN202524707U - grounding system for reducing electromagnetic interference and electric motor vehicle - Google Patents
grounding system for reducing electromagnetic interference and electric motor vehicle Download PDFInfo
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- CN202524707U CN202524707U CN2012200640856U CN201220064085U CN202524707U CN 202524707 U CN202524707 U CN 202524707U CN 2012200640856 U CN2012200640856 U CN 2012200640856U CN 201220064085 U CN201220064085 U CN 201220064085U CN 202524707 U CN202524707 U CN 202524707U
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- grounding system
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- electric motor
- motor vehicle
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Abstract
The utility model provides a reduce electromagnetic interference's ground system for electric motor vehicle. The grounding system comprises a grounding device, a fastening device and an electric brush cover, wherein the grounding device comprises a shaft contact end and a shell contact end, the shaft contact end is in contact with the part of the speed reducer shaft extending out of the shell, and the shell contact end is in contact with the shell of the speed reducer; the fastening device is used for enabling the shaft contact end of the grounding device to be in close contact with the speed reducer shaft; the brush cover accommodates the grounding device therein. The utility model discloses a grounding system switches on the lower retarder casing of electric potential with the electromagnetic wave, and then reduces the electromagnetic radiation that the dc-to-ac converter produced, reduces the influence that wireless communication equipment such as radio in the car received, and guarantee driving safety improves electric motor vehicles's quality. The utility model discloses provide simultaneously have above-mentioned ground system's electric motor vehicle.
Description
Technical field
The electric motor vehicle that the utility model relates to the grounding system of the electromagnetic interference that a kind of inverter that is used to reduce electric motor vehicle produces and has this grounding system.
Background technology
An electric motor vehicle needs use inverter, and inverter can produce very strong electromagnetic radiation, and they are gone out energy transmission in every way, and wireless telecommunications systems such as interior broadcast receiver of car and mobile phone are seriously influenced, and threaten traffic safety.
Prior art mainly adopts following three kinds of methods for the electromagnetic interference that reduces the inverter circuit generation: 1, control interference source makes its electromagnetic interference signal that sends reduce as much as possible in the design of inverter circuit; 2, improve by the antijamming capability of jamming equipment; 3, the blocking-up interference channel shields interference source.
Wherein most widely used is the third method, and the box-like radome that uses a thin aluminum sheet panel beating to support covers inverter, thereby reaches the purpose of shielding interference source.But this method has influenced the heat dispersion of inverter greatly, is unfavorable for the fail safe of car load.Simultaneously, independent design be to carry out, the expense of design and the integral arrangement in inconvenient cabin increased for the inverter of different volumes shape.
For example; Chinese patent 200920259091.5 discloses a kind of air-conditioning inverter screening arrangement; Between the strong power part of locomotive air conditioner inverter casing and light-current system part, be provided with electromagnetic shielding plate; The light-current system element or the control board of locomotive air conditioner inverter are installed on one side of electromagnetic shielding plate, the forceful electric power devices such as main power device of locomotive air conditioner inverter are installed at the another side of electromagnetic shielding plate.Electromagnetic shielding plate is a tabular, and electromagnetic shielding plate is connected with support through securing member, and is fixed on the locomotive air conditioner inverter casing through fixing hole by support; Have a connection jaws in the centre position of electromagnetic shielding plate, the lead that is connected between forceful electric power and the light current connects through connection jaws.Wherein control board can be directly to be fixed on electromagnetic shielding plate through fixture.The periphery of electromagnetic shielding plate and locomotive air conditioner inverter cabinets cavity inner face match, and electromagnetic shielding plate is installed on the casing of locomotive air conditioner inverter through four supports, and is fixed by securing member.This scheme is promptly through using a box-like radome that inverter is covered, thereby reaches the purpose of shielding interference source.
Similarly; Chinese patent 200920010879.2 discloses the automatic control system of a kind of railway electric locomotive through the phase-splitting insulation district; The problem of its solution is that the Qi Yuting of current transformer and motor can make line voltage fluctuation and surge occur in the electric locomotive running, and inverter, frequency converter also can produce serious space electromagnetic interference in running.The main points of this utility model are: system host is installed in the mainframe box of metal material, and the last lower box that constitutes mainframe box is conducting surface contact and ground connection.DC wave filter also is housed in mainframe box, and power-supply filter is connected on power input.This scheme also is through radome shielding interference source, has same shortcoming with above-mentioned patent.
Therefore, how to provide the device of the electromagnetic radiation that a kind of inverter that can reduce electric motor vehicle produces to become the problem that industry need solve.
Summary of the invention
To the shortcoming of prior art, the purpose of the utility model provides a kind of electric motor vehicle that is used to reduce the grounding system of the electromagnetic interference that inverter produces and has this grounding system.
To achieve these goals; The utility model provides a kind of grounding system that is used for the reduction electromagnetic interference of electric motor vehicle; Wherein electric motor vehicle comprises inverter, motor, decelerator; Decelerator comprises housing, in housing, extends to the reducer shaft outside the housing, and housing directly or indirectly contacts with car body; This grounding system comprises earthing device, fastener, brush cover; Wherein, earthing device comprises be coupling contravention and housing contact jaw, and the contravention that is coupling extends to the outer part of housing with reducer shaft and contacts, and the housing contact jaw contacts with the housing of decelerator; Fastener is used to make the contravention that is coupling of earthing device closely to contact with reducer shaft; Brush cover is contained in earthing device in it.
It should be noted that in the utility model that earthing device is not genuine ground connection, but be connected on the relatively low car body of electromotive force through the housing of decelerator.In the specific implementation, according to actual conditions, car body can contact with ground, also can not contact with ground.
In the utility model, therefore rotation during owing to reducer shaft work should not make the contravention that is coupling of earthing device be fixedly connected with reducer shaft, and it is preferably overlap joint or clamped-in style connection.
In the utility model, the housing contact jaw of earthing device can directly contact with the housing of decelerator, also can be through the housing indirect contact of lead and decelerator, and for example, the housing contact jaw contacts with lead, the housing of the other end contact decelerator of this lead.
In the utility model, the housing of decelerator is fixed with respect to car body, thereby the housing contact jaw of earthing device can be fixedly connected with it.For example, the housing contact jaw of earthing device can be through welding, be spirally connected or the realization of the housing of other connected mode and decelerator is fastenedly connected.
In the utility model, the effect of brush cover is that earthing device is contained in it, so that build the contact environment of cleaning for earthing device, avoids water, dust, impurity effect earthing device.Pressure in brush cover is excessive, avoids outside water, dust, impurity to get into simultaneously, and tiny air openings can be set.
The grounding system of the utility model is led to the lower reducer shell of electromotive force with electromagnetic waveguide; And then the electromagnetic radiation of minimizing inverter generation; Reduce the suffered influence of wireless telecommunications systems such as broadcast receiver in the car, guarantee driving safety improves the quality of electric motor vehicle.
A kind of execution mode according to the utility model; Fastener is the elasticity fastener; This elasticity fastener makes the contravention that is coupling of earthing device be in contact with it object through elastic force and closely contacts, and it specifically can be various elastomeric materials (for example elastic caoutchouc) or various elastic constructions (for example various springs such as torsion spring, tension spring).
According to the another kind of execution mode of the utility model, the contravention that is coupling contacts with the outer circumference surface of reducer shaft, is in contact with it when reducer shaft rotates to be implemented in.
According to a kind of execution mode of the utility model, the reducer shaft that is used for contacting with the contravention that is coupling of earthing device is power shaft or the jack shaft between power shaft and output shaft.
According to the another kind of execution mode of the utility model, earthing device comprises at least one brush, and the contravention that is coupling of this brush partly is thicker than other part of brush, and the purpose that is provided with like this is to make brush more wear-resistant.
Particularly, earthing device comprises a brush, and the elasticity fastener is a torsion spring; Perhaps earthing device comprises two brushes, and the elasticity fastener is the tension spring between two brushes.
According to the another kind of execution mode of the utility model, earthing device is " L " shape conductor, and the end of its galianconism is the contravention that is coupling, and its long-armed end is the housing contact jaw.For example, input shaft of speed reducer or jack shaft extend to outside the housing of decelerator, and the end of earthing device galianconism (contravention is coupling) contacts with power shaft or jack shaft outside this housing.
According to the another kind of execution mode of the utility model, brush cover is a complete closed, which is provided with unidirectional pressure relief device (for example unidirectional relief valve), and when the pressure in the brush cover reached certain value, this unidirectional pressure relief device was opened, to reduce the pressure in the brush cover.
On the other hand, the utility model provides a kind of electric motor vehicle, and this electric motor vehicle comprises above-mentioned grounding system.
Compared with prior art, the utility model possesses following beneficial effect:
The grounding system of the utility model is led to the lower reducer shell of electromotive force with electromagnetic waveguide; And then the electromagnetic radiation of minimizing inverter generation; Reduce the suffered influence of wireless telecommunications systems such as broadcast receiver in the car, guarantee driving safety improves the quality of electric motor vehicle.
Below in conjunction with accompanying drawing the utility model is done further to specify.
Description of drawings
Fig. 1 is the structural representation of electric motor vehicle that has the grounding system of embodiment 1, and it has shown the position relation between motor, decelerator, the earthing device;
Fig. 2 is the structural representation of the grounding system of embodiment 1, and it has shown the position relation between input shaft of speed reducer, the earthing device;
Fig. 3 is the structural representation of the grounding system of embodiment 1;
Fig. 4 is the structural representation of the brush cover of embodiment 1;
Fig. 5 is the structural representation of the grounding system of embodiment 2;
Fig. 6 is the structural representation of the grounding system of embodiment 3.
Embodiment
Embodiment 1
Have the electric motor vehicle of present embodiment, as shown in Figure 1, comprise inverter, motor 1, decelerator 2; Grounding system 3.
Motor 1 comprises output shaft 101.Decelerator 2 comprises power shaft 201, jack shaft 202, housing 203, differential gear 204, driving shaft 205.Wherein, the power shaft 201 of decelerator 2 extends to outside the housing 203 of decelerator 2; Driving shaft 205 drive wheels 4.
Like Fig. 2-shown in Figure 4, grounding system 3 comprises earthing device (for example two brushes 301), fastener (for example tension spring 304), brush cover 306.Wherein, brush 301 comprises be coupling contravention and housing contact jaw, and the contravention that is coupling contacts with the power shaft 201 of decelerator 2, and the housing contact jaw contacts with the housing 203 of decelerator 2.The contravention that is coupling that brush 301 contacts with the power shaft 201 of decelerator 2 partly is thicker than other part of brush 301.Tension spring 304 is used to make two brushes 301 closely to contact with the power shaft 201 of decelerator 2.Brush cover 306 is contained in two brushes 301 and tension spring 304 in it.Brush cover 306 is provided with unidirectional pressure relief device (for example unidirectional relief valve 307).
As shown in Figure 5, the difference of present embodiment and embodiment 1 is: 1, earthing device is a brush 302, the power shaft 201 of its contact decelerator 2; 2, fastener is a torsion spring 305.
As shown in Figure 6, the difference of present embodiment and embodiment 1 is: earthing device is " L " shape conductor 303, and the end of its galianconism is the contravention that is coupling, the power shaft 201 of contact decelerator 2; Its long-armed end is the housing contact jaw, is connected with the housing 203 of decelerator 2 through bolt 5.
The difference of present embodiment and embodiment 1 is: be provided with jack shaft between input shaft of speed reducer and the output shaft, this jack shaft extends to outside the housing of decelerator, and the contravention that is coupling of two brushes contacts with the jack shaft of decelerator.
Though the utility model discloses as above with preferred embodiment, be not in order to limit the scope that the utility model is implemented.Any those of ordinary skill in the art, in the invention scope that does not break away from the utility model, when can doing a little improvement, promptly every equal improvement of doing according to the utility model, the scope that should be the utility model contains.
Claims (10)
1. grounding system that is used for the reduction electromagnetic interference of electric motor vehicle; Wherein said electric motor vehicle comprises inverter, motor, decelerator; Said decelerator comprises housing, in said housing, extends to the reducer shaft outside the housing, and said housing directly or indirectly contacts with car body; It is characterized in that said grounding system comprises:
Earthing device, it comprises be coupling contravention and housing contact jaw, and the said contravention that is coupling extends to the outer part of said housing with said reducer shaft and contacts, and said housing contact jaw contacts with the housing of said decelerator;
The fastener that is used to make be coupling contravention and the said reducer shaft of said earthing device closely to contact;
Said earthing device is contained in the brush cover in it.
2. grounding system as claimed in claim 1 is characterized in that, said fastener is the elasticity fastener.
3. grounding system as claimed in claim 1 is characterized in that, the said contravention that is coupling contacts with the outer circumference surface of said reducer shaft.
4. grounding system as claimed in claim 1 is characterized in that, said reducer shaft is power shaft or the jack shaft between said power shaft and output shaft.
5. grounding system as claimed in claim 2 is characterized in that said earthing device comprises at least one brush, and the contravention that is coupling of said brush partly is thicker than other part of said brush.
6. grounding system as claimed in claim 5 is characterized in that, said earthing device comprises a brush, and said elasticity fastener is a torsion spring.
7. grounding system as claimed in claim 5 is characterized in that, said earthing device comprises two brushes, and said elasticity fastener is the tension spring between said two brushes.
8. grounding system as claimed in claim 2 is characterized in that, said earthing device is " L " shape conductor, and the end of its galianconism is the contravention that is coupling, and its long-armed end is the housing contact jaw.
9. grounding system as claimed in claim 1 is characterized in that said brush cover is provided with unidirectional pressure relief device.
10. an electric motor vehicle is characterized in that, said electric motor vehicle comprises the described grounding system of one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200640856U CN202524707U (en) | 2012-02-24 | 2012-02-24 | grounding system for reducing electromagnetic interference and electric motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200640856U CN202524707U (en) | 2012-02-24 | 2012-02-24 | grounding system for reducing electromagnetic interference and electric motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524707U true CN202524707U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200640856U Expired - Lifetime CN202524707U (en) | 2012-02-24 | 2012-02-24 | grounding system for reducing electromagnetic interference and electric motor vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN202524707U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981139A (en) * | 2014-04-12 | 2015-10-14 | 湖北文理学院 | Motor controller control panel shielding structure |
| CN115303204A (en) * | 2022-07-29 | 2022-11-08 | 华侨大学 | New energy automobile and control device thereof |
-
2012
- 2012-02-24 CN CN2012200640856U patent/CN202524707U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981139A (en) * | 2014-04-12 | 2015-10-14 | 湖北文理学院 | Motor controller control panel shielding structure |
| CN115303204A (en) * | 2022-07-29 | 2022-11-08 | 华侨大学 | New energy automobile and control device thereof |
| CN115303204B (en) * | 2022-07-29 | 2024-06-14 | 华侨大学 | New energy automobile and control device thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |
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| CX01 | Expiry of patent term |