EMC Testing Importance in Power Supply Design

ElectroMagnetic Compatibility (EMC) testing is very important during power supply design,actually different standards(62368-1,61558,60335) power supplies tests include not only safety aspect(LVD) but also EMC,so the power supplies must pass the EMC test before getting certificates.
 

Despite its importance,EMC test is often left until the last step of power supplies design.In doing so,the project delay risk and other redesign&test cost maybe occur,so EMC test should be considered and implemented at various stages of power supplies design to ensure that power supplies projects can be launched successfully.

As our main products are power supplies,so in this article we only try to make clear of power supplies EMC.

ElectroMagnetic Compatibility (EMC) Testing

EMC testing can help to minimize the possibility of interference that radiated or conducted emissions produced by power supplies to other electronic devices in the power grid vicinty. EMC testing also ensure the power supplies can resist the interference that radiated or conducted emissions produced by other electronic devices in the power grid vicinty.It can reduce two-way interference between devices in the power grid vicinty.

EMC Testing includes two aspects: Conducted and Radiated test.

ElectroMagnetic Emissions Standards

There are two standards for electromagnetic emissions,they are FCC Part 15 in USA and CISPR 22/EN 55032 in Europe,even so,the two standards are almost harmonized.This means that if power supplies can pass one standard test,they cam pass the other standard test as well.

In addition, the limits for power supplies conducted and radiated emissions are different in US and Europe.

EMC Testing with Power Supplies

Many power supplies are tested as standalone products with EMC testing.Sometimes even the power supplies can pass test,it can ensure the whole system with power supplies also can pass EMC test,so you should put power supplies in the devices as a whole system to make EMC test and assure the system can pass test.

Ways to Test EMC

Some companies has their own equipments of EMC testing,so they can pre-test and make some adjustmens in advance before applying for certificates.
The safe way to test EMC is in a third Lab which has the authority of international certificates organizations such as UL,GS,TUV,Intertek,BV ...

If you need EMC complied power supplies please contact our sales team to get free samples to test with your appliances.