For electric vehicle (EV) charging stations, the Schaffner Group presented the RV series of common-mode chokes at SPS - Smart Production Solutions. Common-mode chokes (CM choke) are components used in electrical circuits to reduce or suppress common-mode interference. This is interference that occurs simultaneously on all lines of a signal cable or network. In charging systems, CM chokes are used especially in alternating current (AC) charging technology to minimize or eliminate common mode noise. Schaffner's new RV CM choke series offers designers a wide choice of power levels. This makes it much easier to comply with EMC standards. Developers of charging stations for electric vehicles can now reduce the cost of compliance by using chokes that exactly match their requirements and thus avoid costly oversizing: For different interference environments, the RV series offers a choice between ferrite (RV8140 & RV8540) and nanocrystalline (RV8141 & RV8541) core technology.
There are eight different power/size options for each current level, four of which are designed for vertical (RV8540) and four for horizontal (RV8140) mounting. The four windings of the new choke are typically installed as three phases and one neutral. For DC applications on the vehicle side, the same choke is used - two windings of the choke can be connected in series, achieving very high attenuation and protecting the vehicle from interference. The RV series is designed for power ratings up to 30 kW with rated currents from 16 A to 50 A per phase at 60 °C ambient temperature and complies with UL/IEC 60938-1/-2 and UL 1446 standards. Other features of the choke include low magnetic leakage flux, excellent winding insulation and low parasitic capacitance.
Developers now have a wide choice of common mode choke options - the Euroconnectors team will be happy to advise you.