What’s driving EMC in EV-charging?

It’s not just plugging a connector in to your car and letting it charge. Holger Urban, product marketing manager, Schaffner International AG, tells us more

With the increasing demand of EV charging installations the International Electrotehnical Commission (IEC) is defining global standards which involve among other important aspects of EMC regulations and safety considerations. This will not only ensure correct system interoperability but also considers conducted EMC emission levels on both sides of the charging stations.

From charging station to EV (CPT port):

IEC61851-1 Electric vehicle conductive charging system

Part 1: General requirements and

Emission testing according to IEC61000-6-3

Immunity testing according to IEC61000-6-1

Part 21-1: EMC requirements for On-board charger connected to an AC/DC supply

Part 21-2: EMC requirements for Off-board AC/DC charging system

Part 23: DC charging station

Part 24: Communication between DC charging station and EV

From charging station to grid/power source:

IEC61000-6-2 & -3  EMC immunity and emission

IEC61000-3-12  Electromagnetic compatibility (EMC) – Limits for harmonic currents

The IEC61851 standard is taking into account all types of off-board charging equipment, which can be used and installed in different locations. This standard covers all residential, commercial, light industrial (acc. IEC61000-6-1 and -3) and industrial environments (acc. IEC61000-6-2 and -4), irrespective of whether the equipment is located indoor or outdoor. Should the environment not be defined, the lowest emission limits and the highest immunity test levels will be applied.

Schaffner can provide standard AC or DC filters (DC up to 1500VDC), custom based filter designs or common mode choke components for embedded filtering which can meet the required targets:

EMC performance levels for any environment

Safety aspects (like variable CY capacitor for DC charging systems acc. to IEC61851-23)

www.schaffner.com

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