Automotive electronic equipment works in cars with constantly changing driving environments. The complexity and variability of the electromagnetic energy in the environment means that the system is subject to a wide range of electromagnetic interference sources. The automotive
Wiring Harness is spread throughout the vehicle and is the main source of electromagnetic interference inside the car. It is also often subject to electromagnetic interference, so how the automotive wiring harness copes with electromagnetic interference is particularly important.
With the continuous development of automotive electronic control technology, the number of automotive electronic equipment has greatly increased, the operating frequency has gradually increased, and the power has gradually increased, making the automotive working environment full of electromagnetic waves, resulting in increasingly prominent electromagnetic interference problems, which may affect the normal operation of electronic equipment at the least and damage the corresponding electrical components at the worst. Therefore, the electromagnetic compatibility performance of automotive electronic equipment has received more and more attention, and it is currently urgently required to widely apply electromagnetic improvement technology for automotive sub-equipment.
With its many years of experience in automotive wiring harness processing, Kaibai Le Electronics generally takes the following measures:
Reduce the area where the wiring harness receives interference: The wiring harness should be designed with the minimum length, minimum impedance and minimum loop area, and it is best to use a power supply method with a small loop area such as twisted pair.
Increase the distance from the device to the interference source: Under the condition that the layout of the interference device remains unchanged, modify the installation position of the sensitive components to increase the distance to the interference source.
Shield the interference source equipment and related wiring harnesses: The electronic control unit used in the electronic control system should be encapsulated in a shielded shell.
Reasonable planning of the wiring harness: The wiring harness layout makes the low-power sensitive circuit close to the signal source, the high-power interference circuit close to the load, and the low-power circuit and the high-power circuit are separated as much as possible to reduce the inductive interference and radiation interference between the wiring harnesses.
Increase wiring harness filtering: For longer wiring harnesses, in order to reduce the conduction and radiation interference, filtering should be added to the wiring harness. It is more convenient to sleeve a suitable ferrite magnetic ring.
Improve the grounding of equipment: Good grounding layout and improved ground wire connection can reduce high-frequency impedance. The grounding of automotive electronic equipment is mainly connected to the vehicle body and the wiring harness shielding layer.
In addition, the electromagnetic interference to the automotive system also comes from the outside and the body. The external interference refers to the interference when the car experiences various external electromagnetic environments while driving, and the body electrostatic interference is related to both the car and the external environment. These two types of electromagnetic interference also occur frequently in daily car operation and deserve attention.
Sejow can provide OEM/ODM wiring harness ，Cnc Machining Parts based on your requirements. Wiring harness, also known as Cable Harness, CNC machining parts are assembly of Cnc Milling Service which transmit signals or electrical power. In the future, Sejow will continue to uphold the business philosophy of "integrity, responsibility, and innovation", provide customers with better products and services, and work together to create a better tomorrow. Consultation hotline: 0755-29426119.
Sejow (Shenzhen) Industrial Co., Ltd.