Chokes optimised for home EV charging stations up to 30kW
Schaffner has developed a series of chokes for residential electric vehicle (EV) charging stations up to 30kW to reduce the cost of complying with regulations.
The RV Series offers the choice between ferrite (RV8140 & RV8540) and nanocrystalline (RV8141 & RV8541) core technology. Each current rating comes with eight different performance/size options, four of them designed for vertical (RV8540) and four for horizontal (RV8140) mounting.
The four windings of the new choke are typically installed as three phases and neutral. For DC applications on the vehicle side the same choke is used – two windings of the choke are connected in series providing very high attenuation and protecting the vehicle from disturbances.
The new 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. In terms of certification, the RV series complies with UL/IEC 60938-1/-2 and UL 1446 and allows designers to select exactly the right part for the size of the home charging station.
Other features of the new choke include low magnetic leakage flux, excellent winding insulation and low parasitic capacitance.
“When designing residential EV charging stations, it is vital to be able to identify any potential electromagnetic compatibility (EMC) challenges and to deal with them as early as possible in the design process,” said Felix Wedel, product manager at Schaffner.
“This new RV series will save designers a considerable amount of bother during the certification process by giving them the tools to comply with all the relevant specifications and regulatory standards. A significant advantage for design engineers is that with this large choice of performance levels they are no longer restricted to using only a choke that is available,” he said. “Now they can choose the one that fits perfectly to their technical requirements and avoid unnecessary costs.”
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