CN210604911U - Suppression device for electromagnetic noise current of new energy automobile motor loading shaft - Google Patents
Suppression device for electromagnetic noise current of new energy automobile motor loading shaft Download PDFInfo
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- CN210604911U CN210604911U CN201921525746.9U CN201921525746U CN210604911U CN 210604911 U CN210604911 U CN 210604911U CN 201921525746 U CN201921525746 U CN 201921525746U CN 210604911 U CN210604911 U CN 210604911U
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- carbon brush
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Abstract
The utility model discloses a suppression device of electromagnetic noise current of a new energy automobile motor loading shaft, which comprises a base, wherein a box body is arranged on the base, a first vertical plate and a second vertical plate are arranged on two sides of the box body, a carbon brush fixing support is arranged in the box body, and the carbon brush fixing support is grounded and is fixed with a carbon brush device; the outer side of the first vertical plate is connected with a tested motor mounting flange, the tested motor mounting flange is connected to the first vertical plate, a tested motor mounting flange insulating pad is arranged between the tested motor mounting flange and the first vertical plate, and a screw insulating pad is arranged between the first hexagon socket screw and the tested motor mounting flange; a double-head spline transmission shaft penetrates through the carbon brush device, one end of the double-head spline transmission shaft is connected with a motor to be tested, and the other end of the double-head spline transmission shaft is connected with a dynamometer driving shaft through an internal spline flange. The device reduces the loop area of the shaft current while ensuring the insulation of the tested motor, and reduces the influence of electromagnetic radiation noise caused by the shaft current and the influence of electrostatic discharge caused by metal impact.
Description
Technical Field
The utility model relates to a EMC testing arrangement especially relates to a suppression device of new energy automobile motor loading axle electromagnetic noise electric current.
Background
At present, when an EMC test is carried out, one type is that a loading shaft of a dynamometer is metal and has conductivity, and a tested motor (a new energy automobile motor) is grounded. Along with the dynamometer drives the motor to run at a high speed, the outer ring of the output shaft of the motor is not in electric contact, the parasitic coupling capacitor in the motor is charged at the moment, the outer ring of the output shaft of the motor is short-circuited due to factors such as mechanical vibration, the charging capacitor can discharge, and a certain current effect can be formed. The impedance of the output shaft of the motor is small, and a bearing current generated by du/dt of common mode voltage is provided for a path to form the du/dt current. Meanwhile, the stator and the rotor of the tested motor are converted by electric energy and mechanical energy and are a broadband source of electromagnetic radiation, the disturbance can be conducted into a semi-anechoic chamber through a metal shaft of the dynamometer and a metal shaft of the tested motor, the noise radiated by a tested sample or the electromagnetic radiation noise of the dynamometer cannot be judged, and a transmitting source cannot be positioned. The other is that the loading shaft of the dynamometer and the matching shaft of the tested motor and the dynamometer are non-metal. The loading shaft of the dynamometer and the matching shaft of the tested motor and the dynamometer are non-metal, so that the requirement on the material is very high, the torque is high, and the rotating speed is high, so that the shaft is easy to deform or even break. Therefore, developing a device for suppressing electromagnetic noise current of a loading shaft of a motor of a new energy automobile becomes a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve above-mentioned not enough, provide a suppression device of new energy automobile motor loading axle electromagnetic noise electric current.
The above object of the present invention is achieved by the following technical solutions: the device for inhibiting the electromagnetic noise current of the motor loading shaft of the new energy automobile comprises a base, wherein a box body is arranged on the base, a first vertical plate and a second vertical plate are respectively arranged on two sides of the box body, the first vertical plate is provided with a first shaft hole, the second vertical plate is provided with a second shaft hole, a carbon brush fixing support is arranged in the box body and is grounded, and a carbon brush device is fixed at the upper end of the carbon brush fixing support; the first shaft hole, the carbon brush device and the second shaft hole are positioned on the same axis;
the outer side of the first vertical plate is connected with a tested motor mounting flange, the tested motor mounting flange is provided with a central shaft hole, the tested motor mounting flange is connected to the first vertical plate through a first inner hexagonal screw, a tested motor mounting flange insulating pad is arranged between the tested motor mounting flange and the first vertical plate, and a screw insulating pad is arranged between the first inner hexagonal screw and the tested motor mounting flange;
a double-head spline transmission shaft penetrates through the carbon brush device, one end of the double-head spline transmission shaft penetrates through a first shaft hole of the first vertical plate and a central shaft hole of a mounting flange of the motor to be detected, and the double-head spline transmission shaft is connected with the motor to be detected; the other end of the double-end spline transmission shaft is connected with an inner spline flange, the inner spline flange is connected with a dynamometer driving shaft, and the dynamometer driving shaft penetrates through a second shaft hole in the second vertical plate to be connected with the dynamometer.
Furthermore, the internal spline flange is connected with the dynamometer driving shaft through a second internal hexagonal screw, and an insulating flange gasket is arranged between the internal spline flange and the dynamometer driving shaft.
Further, an insulating washer is arranged between the second inner hexagonal screw and the inner spline flange.
Furthermore, a reinforcing rib plate is arranged on the inner side of the first vertical plate.
Furthermore, a handle is arranged at the top of the box body.
The utility model discloses an add "being surveyed motor mounting flange insulating pad", "screw insulating pad", "insulating flange gasket" and "insulating washer" in the device, guaranteed that device surface and metal screw are all insulating, also guaranteed that the motor is insulating with the dynamometer, add "carbon brush device" and "carbon brush fixed bolster" simultaneously, both ground connection simultaneously has reduced the loop area of axle current circulation, has reduced the influence of electromagnetic radiation noise greatly.
Compared with the prior art, the utility model the advantage be:
1. the utility model discloses higher adaptability and data accuracy have.
In order to ensure the accuracy of EMC test data, the tested motor is not grounded, the device reduces the loop area of shaft current while ensuring the insulation of the tested motor, reduces the influence of electromagnetic radiation noise caused by the shaft current and the influence of electrostatic discharge caused by metal impact, helps an EMC test engineer to accurately position an emission source, and avoids misjudgment on a test result.
2. The utility model has the characteristics of equipment operation is simple and convenient, low cost.
The device is simple to operate, only needs to be installed on a flange of a dynamometer driving shaft, cuts off the conductivity of a metal shaft, conducts shaft current noise to the ground, carries out insulation treatment on a mounting flange of a tested motor, and is convenient to transform the existing metal shaft dynamometer.
Drawings
Fig. 1 is a schematic front side structure diagram of the present invention.
Fig. 2 is a schematic diagram of the rear side structure of the present invention.
Fig. 3 is a sectional view of the axial plane of the middle double-headed spline transmission shaft of the present invention.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a schematic structural diagram of the interior of the middle box body of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the device for suppressing electromagnetic noise current of a new energy automobile motor loading shaft includes a base 1, a box body 2 is arranged on the base 1, a first vertical plate 3 and a second vertical plate 4 are respectively arranged on two sides of the box body 2, the first vertical plate 3 is provided with a first shaft hole 5, the second vertical plate 4 is provided with a second shaft hole 6, a carbon brush fixing support 7 is arranged in the box body 2, the carbon brush fixing support 7 is grounded, and a carbon brush device 8 is fixed at the upper end of the carbon brush fixing support 7; the first shaft hole 5, the carbon brush device 8 and the second shaft hole 6 are positioned on the same axis;
a tested motor mounting flange 9 is connected to the outer side of the first vertical plate 3, a central shaft hole 10 is formed in the tested motor mounting flange 9, the tested motor mounting flange 9 is connected to the first vertical plate 3 through a first inner hexagonal screw 11, a tested motor mounting flange insulating pad 12 is arranged between the tested motor mounting flange 9 and the first vertical plate 3, and a screw insulating pad 13 is arranged between the first inner hexagonal screw 11 and the tested motor mounting flange 9;
a double-headed spline transmission shaft 14 penetrates through the carbon brush device 8, one end of the double-headed spline transmission shaft 14 penetrates through the first shaft hole 5 of the first vertical plate 3 and the central shaft hole 10 of the mounting flange 9 of the motor to be tested, and is connected with the motor to be tested (not shown); the other end of the double-end spline transmission shaft 14 is connected with an inner spline flange 15, the inner spline flange 15 is connected with a dynamometer drive shaft 16, and the dynamometer drive shaft 16 penetrates through a second shaft hole 6 in the second vertical plate 4 to be connected with a dynamometer (not shown).
Further, the internal spline flange 15 is connected with the dynamometer drive shaft 16 through a second internal hexagonal screw 17, and an insulating flange gasket 18 is arranged between the internal spline flange 15 and the dynamometer drive shaft 16.
Further, an insulating washer 19 is arranged between the second inner hexagonal screw 17 and the inner spline flange 15.
Further, a reinforcing rib plate 20 is arranged on the inner side of the first vertical plate 3.
Further, a handle 21 is arranged at the top of the box body 2.
The utility model discloses an add "being surveyed motor mounting flange insulating pad 12", "screw insulating pad 13", "insulating flange gasket 18" and "insulating washer 19" in the device, guaranteed that device surface and metal screw are all insulating, also guaranteed that the motor is insulating with the dynamometer machine, add "carbon brush device 8" and "carbon brush fixed bolster 7" simultaneously, both ground connection simultaneously has reduced the loop area of axle current circulation, has reduced the influence of electromagnetic radiation noise greatly.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. The utility model provides a suppression device of new energy automobile motor loading axle electromagnetic noise electric current which characterized in that: the carbon brush fixing device comprises a base, wherein a box body is arranged on the base, a first vertical plate and a second vertical plate are respectively arranged on two sides of the box body, the first vertical plate is provided with a first shaft hole, the second vertical plate is provided with a second shaft hole, a carbon brush fixing support is arranged in the box body and is grounded, and a carbon brush device is fixed at the upper end of the carbon brush fixing support; the first shaft hole, the carbon brush device and the second shaft hole are positioned on the same axis;
the outer side of the first vertical plate is connected with a tested motor mounting flange, the tested motor mounting flange is provided with a central shaft hole, the tested motor mounting flange is connected to the first vertical plate through a first inner hexagonal screw, a tested motor mounting flange insulating pad is arranged between the tested motor mounting flange and the first vertical plate, and a screw insulating pad is arranged between the first inner hexagonal screw and the tested motor mounting flange;
a double-head spline transmission shaft penetrates through the carbon brush device, one end of the double-head spline transmission shaft penetrates through a first shaft hole of the first vertical plate and a central shaft hole of a mounting flange of the motor to be detected, and the double-head spline transmission shaft is connected with the motor to be detected; the other end of the double-end spline transmission shaft is connected with an inner spline flange, the inner spline flange is connected with a dynamometer driving shaft, and the dynamometer driving shaft penetrates through a second shaft hole in the second vertical plate to be connected with the dynamometer.
2. The device for suppressing the electromagnetic noise current of the motor loading shaft of the new energy automobile according to claim 1, is characterized in that: the internal spline flange is connected with the dynamometer driving shaft through a second internal hexagonal screw, and an insulating flange gasket is arranged between the internal spline flange and the dynamometer driving shaft.
3. The device for suppressing the electromagnetic noise current of the motor loading shaft of the new energy automobile according to claim 2, is characterized in that: and an insulating washer is arranged between the second inner hexagonal screw and the inner spline flange.
4. The device for suppressing the electromagnetic noise current of the motor loading shaft of the new energy automobile according to claim 1, is characterized in that: and a reinforcing rib plate is arranged on the inner side of the first vertical plate.
5. The device for suppressing the electromagnetic noise current of the motor loading shaft of the new energy automobile according to claim 1, is characterized in that: the top of the box body is provided with a handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921525746.9U CN210604911U (en) | 2019-09-12 | 2019-09-12 | Suppression device for electromagnetic noise current of new energy automobile motor loading shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921525746.9U CN210604911U (en) | 2019-09-12 | 2019-09-12 | Suppression device for electromagnetic noise current of new energy automobile motor loading shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210604911U true CN210604911U (en) | 2020-05-22 |
Family
ID=70697100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921525746.9U Active CN210604911U (en) | 2019-09-12 | 2019-09-12 | Suppression device for electromagnetic noise current of new energy automobile motor loading shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210604911U (en) |
-
2019
- 2019-09-12 CN CN201921525746.9U patent/CN210604911U/en active Active
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