CN207481634U - Motor system and electric automobile - Google Patents
Motor system and electric automobile Download PDFInfo
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- CN207481634U CN207481634U CN201721635995.4U CN201721635995U CN207481634U CN 207481634 U CN207481634 U CN 207481634U CN 201721635995 U CN201721635995 U CN 201721635995U CN 207481634 U CN207481634 U CN 207481634U
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- motor
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- machine controller
- electric machine
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- 239000002184 metal Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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Abstract
The utility model provides a motor system and electric automobile, wherein motor system, be connected with first wire (5) between the casing of motor controller (1) and motor (2) motor controller (1) and the casing of motor (2), be connected with second wire (6) between the casing of motor controller (1) and whole car reference ground (8). The embodiment of the utility model provides a casing and the casing of machine controller (1) of motor (2) are connected through first wire (5), on the casing of machine controller (1) is sent with the conduction of common mode current on the casing of motor (2), reduced the loop area in common mode current return circuit, the effectual common mode noise that has reduced electrical machinery system, and then reduced the EMI noise of whole car.
Description
Technical field
The utility model is related to Electromagnetic Interference Suppressing Techniques field, more particularly to a kind of electric system and automobile.
Background technology
Pure electric automobile is to convert electrical energy into torque by a motor to drive automobile onward impulse battery by three
Phase direct current continuously transports out, by converter by the direct current of three-phase be converted to suitable driving motor direct current or
Alternating current, so as to which vehicle be driven to advance.
Electromagnetic interference (Electromagnetic Interference, abbreviation EMI) inhibition problem of electric vehicle is electricity
One particularly significant and stubborn problem of electrical automobile.One main source of EMI noise of electric vehicle is electric system, motor
System common-mode noise generates principle schematic as shown in Figure 1, two insulated gate bipolars in the driving circuit 101 of electric machine controller 1
The big voltage change that transistor npn npn (Insulated Gate Bipolar Transistor, abbreviation IGBT) junction generates
Rate is main EMI noise source of the driving common mode current by triple line to motor 2, and common-mode noise needs motor 2 and motor control
The parasitism that device 1 processed is generated by ground wire 4, the housing through vehicle reference ground 8 and driving circuit 101 and electric machine controller 1
Capacitance 102, back in driving circuit 101, common mode current by ground wire 4 and when vehicle reference ground 8 can generate compared with
Big loop area makes common mode current influence other interior electric appliances, so as to generate larger vehicle EMI noise.
Reduce the loop area of common mode current, provide a return path to common mode current, common mode current is controlled one
It is returned in a smaller range, can effectively reduce common-mode noise, so as to reduce electric automobile whole EMI noise.
Utility model content
The utility model embodiment technical problems to be solved are to provide a kind of electric system, reduce motor control to realize
Common mode current loops area between device and motor processed, so as to reduce the common-mode noise between electric machine controller and motor, and then
Reduce the EMI noise of vehicle.
In order to solve the above technical problems, the utility model embodiment provides a kind of electric system, including electric machine controller
And motor；The first conducting wire, the housing and vehicle of electric machine controller are connected between the housing of electric machine controller and the housing of motor
The second conducting wire is connected between reference ground.
Electric system as described above, wherein, three-phase harness is connected between electric machine controller and motor.
Optionally, electric system as above, wherein, the first conducting wire is connected by multiple wire bundle fixing structures and three-phase harness
It connects.
Optionally, electric system as described above, wherein, electric machine controller further includes the housing for being set to electric machine controller
On three-phase wiring connector, be provided with the sheet metal being connect with the housing of electric machine controller, the first conducting wire on three-phase wiring connector
It is connected by the housing of sheet metal and electric machine controller.
Optionally, electric system as described above, wherein, one end of the second conducting wire and the housing of electric machine controller enclose and set three
The part connection of phase wiring connector.
A kind of electric vehicle, including：Electric system as described above.
Compared with prior art, the electric system and electric vehicle that the utility model embodiment provides, at least with following
Advantageous effect：
The housing of motor and the housing of electric machine controller are connected by the first conducting wire, by the common mode current on the housing of motor
On conduction to the housing of electric machine controller, vehicle reference ground need to be passed through by reducing the common mode current on the housing of motor at this stage
Back to the loop area of driving circuit, the common-mode noise of electric system is effectively reduced, and then the EMI for reducing vehicle makes an uproar
Sound.
Description of the drawings
Fig. 1 generates principle schematic for electric system common-mode noise；
Fig. 2 is the electric system electrical block diagram of the utility model；
Fig. 3 is the electric system structure diagram of the utility model.
【Reference sign】
1st, electric machine controller；101st, driving circuit；102nd, parasitic capacitance；103rd, three-phase wiring connector；
2nd, motor；3rd, three-phase harness；4th, it is grounded；5th, the first conducting wire；6th, the second conducting wire；
7th, wire bundle fixing structure；8th, vehicle reference ground.
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.In the following description, such as specific be configured with the specific detail of component only is provided
Only to assist in the embodiment of comprehensive understanding the utility model.It therefore, it will be apparent to those skilled in the art that can be to here
The embodiment of description is made various changes and modifications without departing from the scope of the utility model and spirit.In addition, in order to clear and
Succinctly, the description to known function and construction is omitted.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the utility model.Therefore, go out everywhere in the whole instruction
Existing " in one embodiment " or " in one embodiment " not necessarily refers to identical embodiment.In addition, these are specific special
Sign, structure or characteristic can in any suitable manner combine in one or more embodiments.
In the various embodiments of the utility model, it should be appreciated that the size of the serial number of following each processes is not meant to hold
The priority of row sequence, the execution sequence of each process should be determined with its function and internal logic, be implemented without coping with the utility model
The implementation process of example forms any restriction.
Referring to Fig. 2 or Fig. 3, a preferred embodiment of the utility model provides a kind of electric system, is controlled including motor
Device 1 and motor 2；It is characterized in that, the first conducting wire 5, motor are connected between the housing of electric machine controller 1 and the housing of motor 2
The second conducting wire 6 is connected between the housing of controller 1 and vehicle reference ground 8.
In the utility model, the common mode current that the connection circuit of the housing of the first conducting wire 5 to electric machine controller 1 is formed returns
Telegram in reply road compared to the common mode current on the housing of motor 2 at this stage, need to pass through two ground wires 4 and vehicle reference ground 8
The common mode current circuit of composition, impedance smaller, the loop area smaller of generation, enable common mode current within the shorter time from
The housing of motor 2 is conducted to the housing of electric machine controller 1, and then passes through the housing of electric machine controller 1 and posting for driving circuit 101
Raw capacitance 102 is back in driving circuit 101, effectively reduces the common-mode noise of electric system and to other interior electric appliances
Influence, and then reduce the EMI noise of vehicle.
In addition, the first conducting wire 5 and the second conducting wire 6 form the circuit of the frame ground of motor 2 so that the housing of motor 2 is not
Ground wire 4 must be separately provided, can also realize the housing of motor 2 and 8 equipotential of vehicle reference ground, reduce in the design phase
And erection stage carries out the difficulty of independent grounding for motor 2.
Specifically, three-phase harness 3 is connected between electric machine controller 1 and motor 2.
Preferably, the first conducting wire 5 is connect by multiple wire bundle fixing structures 7 with three-phase harness 3.
First conducting wire 5 is connect by multiple wire bundle fixing structures 7 with three-phase harness 3, makes the first conducting wire 5 and three-phase harness 3
It is fixed together to ensure that the succinct of interior harness on the car body, while avoid and independent fixed behaviour is carried out to the first conducting wire 5
Make, reduce the set-up time of erection stage, improve production efficiency.Wherein, wire bundle fixing structure 7 include wiring harness ribbon or its
He is used for the part or structure of fixed beam.
Preferably, electric machine controller 1 further includes the three-phase wiring connector 103 being set on the housing of electric machine controller 1, and three
The sheet metal being connect with the housing of electric machine controller 1 is provided on phase wiring connector 103, the first conducting wire 5 passes through sheet metal and electricity
The housing connection of machine controller 1.
Three-phase wiring connector 103 on the housing of electric machine controller 1 is also electric machine controller for connecting triple line
The nearest one end of housing on 1 housing apart from motor 2, is provided with the shell with electric machine controller 1 on three-phase wiring connector 103
The sheet metal of body connection, and by the housing of the first conducting wire of sheet metal connection 5 and electric machine controller 1, enable the first conducting wire 5 securely
Be connected on the housing of electric machine controller 1, while reduce the length of the first conducting wire 5, so as to reduce common mode current return
Common mode current control in a smaller range is returned, effectively reduces electric system by road path and loop area
Common-mode noise.
Specifically, one end of the second conducting wire 6 and the housing of electric machine controller 1, which enclose, sets the part of three-phase wiring connector 103 and connects
It connects.
One end of second conducting wire 6 is connect on the housing of electric machine controller 1 close to the part of three-phase wiring connector 103, is made
Part returned to by the first conducting wire 5 common mode current of the housing of electric machine controller 1 in a relatively short period of time by the second conducting wire 6 with
8 equipotential of vehicle reference ground avoids the common mode current returned from the housing of motor 2 by the first conducting wire 5, it is impossible to pass through in time
The housing of electric machine controller 1 and the parasitic capacitance 102 of driving circuit 101 return to driving circuit 101, to electric machine controller 1 or its
He has an impact electric appliance.
The another preferred embodiment of the utility model provides a kind of electric vehicle, including：Electric system as described above.
In the present embodiment, electric system makes the housing of motor 2 and electric machine controller 1 by the setting of the first conducting wire 5
Housing connects, and two IGBT junctions in driving circuit 101 are generated, and pass through three-phase harness 3 and conduct by voltage change ratio
Common mode current to the housing of motor 2 is conducted to the housing of electric machine controller 1 by the first conducting wire 5, and passes through motor control
The housing of device 1 processed is back to the parasitic capacitance 102 of driving circuit 101 in driving circuit 101, compared to common mode current at this stage
The housing of electric machine controller 1 can only be back to by vehicle reference ground 8, and then be back in driving circuit 101, reduced altogether
The return path and loop area of mould electric current, reduce the common-mode noise of electric system, and the EMI for thereby reducing vehicle makes an uproar
Sound.
In addition, the utility model can in different examples repeat reference numerals and/or letter.This repetition is for letter
Change with clear purpose, the relationship between itself not indicating discussed various embodiments and/or setting.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid non-exclusive inclusion.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, under the premise of principle described in the utility model is not departed from, several improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (6)
1. a kind of electric system, including electric machine controller (1) and motor (2)；It is characterized in that, the electric machine controller (1)
The first conducting wire (5) is connected between the housing of housing and the motor (2), housing and the vehicle of the electric machine controller (1) are joined
It examines and is connected with the second conducting wire (6) between ground (8).
2. electric system according to claim 1, which is characterized in that the electric machine controller (1) and the motor (2) it
Between be connected with three-phase harness (3).
3. electric system according to claim 2, which is characterized in that first conducting wire (5) is fixed by multiple harness
Structure (7) is connect with the three-phase harness (3).
4. electric system according to claim 1, which is characterized in that the electric machine controller (1), which further includes, is set to institute
The three-phase wiring connector (103) on the housing of electric machine controller (1) is stated, is provided on the three-phase wiring connector (103) and institute
The sheet metal of the housing connection of electric machine controller (1) is stated, first conducting wire (5) is controlled by the sheet metal and the motor
The housing connection of device (1).
5. electric system according to claim 4, which is characterized in that one end of second conducting wire (6) and the motor
The housing of controller (1) encloses the part connection for setting the three-phase wiring connector (103).
6. a kind of electric vehicle, which is characterized in that including：Such as electric system described in any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635995.4U CN207481634U (en) | 2017-11-30 | 2017-11-30 | Motor system and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635995.4U CN207481634U (en) | 2017-11-30 | 2017-11-30 | Motor system and electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207481634U true CN207481634U (en) | 2018-06-12 |
Family
ID=62473001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721635995.4U Active CN207481634U (en) | 2017-11-30 | 2017-11-30 | Motor system and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207481634U (en) |
-
2017
- 2017-11-30 CN CN201721635995.4U patent/CN207481634U/en active Active
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