CN206743157U - A kind of motor-driven EMC system and three-phase cable - Google Patents
A kind of motor-driven EMC system and three-phase cable Download PDFInfo
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- CN206743157U CN206743157U CN201720310010.4U CN201720310010U CN206743157U CN 206743157 U CN206743157 U CN 206743157U CN 201720310010 U CN201720310010 U CN 201720310010U CN 206743157 U CN206743157 U CN 206743157U
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Abstract
The utility model is applied to motor-driven technical field of electromagnetic compatibility, provide a kind of motor-driven EMC system and three-phase cable, system includes three phase electric machine and the motor driver being connected with three phase electric machine, and it is connected to the three-phase cable between the three phase electric machine and the motor driver, it is characterized in that, return wire is arranged with parallel on the power cable of each phase of threephase cable, one end of the return wire is connected to the three phase electric machine casing, the other end is connected to the motor driver casing, the three phase electric machine chassics earth, motor driver chassics earth, common-mode voltage caused by absorption and suppression three phase electric machine and motor driver work, effectively reduce the external electromagnetic interference of electric system, improve the reliability and stability of whole system.The utility model additionally provides a kind of three-phase cable applied to the system.
Description
Technical field
The utility model belongs to motor-driven technical field of electromagnetic compatibility, more particularly to a kind of electricity of motor-drive circuit
Magnetic compatible system and three-phase cable.
Background technology
At present, various motors are commonly utilized in the various civil systems such as industry, business, agricultural, especially in new energy vapour
Car application field, motor driven systems generally use pulse modulation technique (PWM), and the three-phase inverting circuit of motor driver produces
High frequency common mode voltage bring many negative effects to system, the electromagnetic compatibility (EMC) of electric automobile is particularly problematic, not only
The wireless device of vehicle periphery can be influenceed, vehicle interior anti-blocking brake system can be also influenceed by way of conducting or radiating
(ABS), the functional reliability of the electronic control unit such as air bag (SRS) and electrically controlled brake system (EBS), direct relation
To the security of vehicle traveling.
The content of the invention
To solve the above problems, providing a kind of motor-driven EMC system, the system can have the utility model
Radiation interference caused by effect reduction motor driver and motor work, meet the motor electromagnetic compatibility performance requirement of standard, so as to
Improve the stability of whole control system.
The utility model is achieved in that a kind of motor-driven EMC system, including three phase electric machine and with three
The motor driver of phase motor connection, and the three-phase cable being connected between the three phase electric machine and the motor driver,
Characterized in that, it is arranged with return wire, one end of the return wire on the power cable of each phase of the three-phase cable in parallel
The three phase electric machine casing is connected to, the other end is connected to the motor driver casing.
Preferably, in addition to electric capacity, the capacitance series are on the return wire.
Preferably, it is provided with screen layer in the threephase cable, the screen layer is by three-phase power cable and return wire
In being coated on.
Preferably, the screen layer and described 360 degree of overlap joints of three phase electric machine casing, the screen layer and the motor
360 degree of overlap joints of driver casing.
Another object of the present utility model is to provide a kind of three-phase cable, it is characterised in that including：
Power cable, return wire is arranged with parallel on power cable described in each phase；And
The power cable and the return wire are coated on interior by screen layer, the screen layer.
Preferably, in addition to annular connector, the three-phase cable both ends, the screen layer and the ring are arranged on
360 degree of overlap joints of shape connector.
The utility model by the three-phase cable of three phase electric machine the power cable of each phase correspondingly be arranged in parallel backflow
Line, absorb and suppress three phase electric machine and motor driver work caused by common-mode voltage, it is external effectively to reduce electric system
Electromagnetic interference, so as to improve the reliability and stability of whole system.
Brief description of the drawings
Fig. 1 is the structural representation for the motor-driven EMC system that the utility model embodiment is provided；
Fig. 2 is the structure chart for the motor-driven EMC system that the utility model embodiment is provided；
Fig. 3 is the structural representation for the three-phase cable that the utility model embodiment is provided.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
The utility model embodiment passes through the backflow that correspondingly be arranged in parallel around the power cable of each phase in three-phase cable
Line, radiation interference external when three phase electric machine 1 and the work of motor driver 2 is reduced, ensure the stable performance of whole control system.
Fig. 1 shows the structural representation of the motor-driven EMC system of the utility model embodiment, for the ease of
Illustrate, illustrate only the part related to the utility model, details are as follows：
Motor-driven EMC system includes three phase electric machine 1, motor driver 2, three-phase cable, return wire.Three-phase
Cable is connected between three phase electric machine 1 and motor driver 2, the three-phase alternating current that three phase electric machine 1 is provided by three-phase cable,
Work is run under the control of motor driver 2.
In the present embodiment, motor driver 2 can be frequency converter or servo amplifier, frequency converter or servo amplifier it is defeated
Go out end connection three-phase cable, three-phase cable is connected to the input of three phase electric machine 1.Power cable U, V, W in threephase cable
Each phase cable run external side parallel is provided with return wire (being represented by dashed line in figure), return wire and power cable U in threephase cable,
V, W, which is corresponded, is set, and one end of return wire is connected with three phase electric machine casing 3, and the other end is connected with motor driver casing 4,
Three phase electric machine casing 3 and motor driver casing 4 are grounded simultaneously, form a complete ground connection reflux line.Three-phase current exists
Common mode disturbances caused by transmission are effectively eliminated and shielded by return wire in threephase cable, reduce the He of three phase electric machine 1
The system of motor driver 2 external radiation interference at work.
As the preferred embodiment of the utility model one, one end of return wire is connected to electric capacity, the electric capacity one end and backflow
Line connects, and other end ground connection, for adjusting the line impedance of return wire, is allowed to match with the induced voltage on return wire, subtracts
The line loss of few threephase cable, the preferred capacitance size of electric capacity is 1uF, in the particular embodiment, can be according to actual conditions
Adjust the capacitance size of electric capacity.
Refer to shown in Fig. 2, in order to strengthen shield effectiveness, power cable and return wire (use dotted line in three-phase cable in figure
Represent) it is coated with one layer of screen layer 5, the external radiation interference of further shielded transmission line, the one end of screen layer 5 and three-phase electricity
Machine casing 3 is connected, and the other end is connected with motor driver casing 4, the outer cladding insulating protective layer 6 of screen layer 5.In the present embodiment
In, the electrical contact of screen layer and three phase electric machine casing 3 and motor driver casing 4 is overlapped using 360 degree so that whole transmission line
Road includes shielding model of the three-phase cable with the junction of three phase electric machine casing 3 and motor driver casing 4 all in screen layer 5
Enclose, strengthen the shielding tightness of screen layer 5.
Refer to shown in Fig. 3, another object of the present utility model also resides in, there is provided a kind of three-phase cable, including power line
Cable, return wire (being represented by dashed line in figure) and screen layer 5.In three-phase cable backflow is arranged with parallel on the power cable of each phase
Line, in three-phase power cable and return wire are coated on by screen layer, screen layer 5 is coated with insulating protective layer 6.Three-phase cable is used
Three-phase alternating current required for being provided to three phase electric machine, maintains the operating of three phase electric machine.Also include annular connector 7, set
At three-phase cable both ends, screen layer 5 is realized by annular connector 7 and connect with described 7 360 degree of overlap joints of annular connector, screen layer
Ground, strengthen the shield effectiveness of screen layer 5.
In the utility model embodiment, put down by the way that each phase power cable is corresponding in the three-phase cable of three phase electric machine 1
Row sets return wire, absorbs and suppresses three phase electric machine 1 and motor driver 2 and works caused common-mode voltage, further, three-phase
Power cable and return wire is coated with one layer of screen layer, screen layer and three phase electric machine casing 2 and motor driver in cable
4 360 degree of casing overlap joint, effectively reduce the external electromagnetic interference of electric system, so as to improve the reliability of whole system and
Stability.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of motor-driven EMC system, including three phase electric machine, motor driver and it is connected to the three-phase electricity
Three-phase cable between machine and the motor driver, it is characterised in that:
It is arranged with return wire in the threephase cable on the power cable of each phase in parallel, one end of the return wire is connected to three
Phase motor case, the other end are connected to motor driver casing, the three phase electric machine chassics earth, and motor driver casing connects
Ground.
2. motor-driven EMC system as claimed in claim 1, it is characterised in that also including electric capacity, the electric capacity
It is serially connected on the return wire.
3. motor-driven EMC system as claimed in claim 1, it is characterised in that screen is provided with the threephase cable
Layer is covered, three-phase power cable and return wire are coated on interior by the screen layer.
4. motor-driven EMC system as claimed in claim 3, it is characterised in that the screen layer and the three-phase
360 degree of overlap joints of motor case, the screen layer and described 360 degree of overlap joints of motor driver casing.
A kind of 5. three-phase cable, it is characterised in that including：
Power cable, return wire is arranged with parallel on power cable described in each phase；
The power cable and the return wire are coated on interior by screen layer, the screen layer.
6. three-phase cable as claimed in claim 5, it is characterised in that also including annular connector, be arranged on the triple line
Cable both ends, the screen layer and described 360 degree of overlap joints of annular connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720310010.4U CN206743157U (en) | 2017-03-28 | 2017-03-28 | A kind of motor-driven EMC system and three-phase cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720310010.4U CN206743157U (en) | 2017-03-28 | 2017-03-28 | A kind of motor-driven EMC system and three-phase cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206743157U true CN206743157U (en) | 2017-12-12 |
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ID=60558716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720310010.4U Active CN206743157U (en) | 2017-03-28 | 2017-03-28 | A kind of motor-driven EMC system and three-phase cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206743157U (en) |
-
2017
- 2017-03-28 CN CN201720310010.4U patent/CN206743157U/en active Active
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