Over time, technology has increased the number of electrical components found in cars. As the number of components rises, they can begin to interfere with each other. This is where the automotive EMC test is important, it tests each part for electromagnetic compatibility. Certain parts may also interfere with outside equipment if they are not properly tests and brought into compliance. Here is an overview of some of the global standards automotive components must meet.
Radiated Emissions Standards
There are two common radiated emissions standards in use today: 95/54/EC and CISPR-25. These handle the broadband and narrowband emissions with fixed test levels and a frequency range of 30MHz to 1GHz. Even though the tests specify certain points, it is most common to test along the entire range.
Radiated Immunity Standards
Just as some components need to be tested for their emissions, other components need to be tested for their immunity. Since the emissions cannot be brought down to zero, certain parts need to be immune from this interference. Typically, a free field that can produce up to 1GHz is used in this testing process.
Conducted Emissions
This kind of automotive EMC test is mainly concerned with external interference such as radios used by nearby service and emergency vehicles. Signals output by a passenger vehicle must not compromise the integrity of police and medical vehicles.
Immunity to EDS
EDS stands for electrostatic discharge. Vital systems within a vehicle need to be resistant to such discharge to prevent shutting down those components and creating an unsafe environment for passengers. One such system is the airbag deployment device and certain fuel systems.
An automotive EMC test is an important part of manufacturing electronics for cars. There are many standards to meet, both internationally and specific to certain countries. If you manufacture vehicle electronics, then it is important that you stay up to date on all of these important standards.
