New choke series mitigates EMI issues in robotics and motor drives

Schaffner has expanded its range of filtering solutions for suppressing EMI with a new common-mode choke series created for use with mid-size power range drives often employed in robotics and motor drives.

If not dealt with, EMI may cause robots to behave with unexpected movements, meaning a severe risk to factory workers and the probability of costly damage. Also, EMI could interfere with operational safety systems, such as the false triggering of a safety mechanism, leading to unnecessary equipment stoppages or safety protection systems failing to operate when needed.

By installing this new current-compensated choke – which can operate at currents up to 63A – it is now easier than ever to stop EMI noise from going to power lines and disturbing the functioning of other systems. Ensuring enhanced immunity against grid disturbances, the choke series suppresses EMI noise in PCB-integrated filter designs.

The company developed the new choke series to satisfy the growing usage of automation and electrification across various industries. Designed to help minimise costs, the addition of the series also supports design engineers working across a range of industrial segments.

The choke series is compact, lightweight, and offers horizontal or vertical PCB mounting options. Available in two- or three-wire configurations, the series also delivers a broad range of inductance ratings and features a UL-approved insulation system, exceptional winding insulation and a standardised footprint, allowing designers to swap chokes and alter specifications without making design changes. Custom-specific versions of the choke are available on request.

Felix Wedel, product manager at Schaffner, explains: “As the world changes, it is important that we keep developing the best solutions for our customers. For product designers in this sector, a flexible range of mounting possibilities and cost-effective PCB designs are crucial in order to deliver a reliable and cost-effective EMC solution. The RT choke series has proved to be a popular and reliable solution for many sectors, and a choke capable of operating at higher currents will be a valuable addition to the range.”

Wedel adds: “As is often the case, it is best to seek advice from the experts to identify any potential EMC challenges and find solutions as early as possible in the design process.”

The choke is also ideal for AC and DC filtering up to 600V in fast chargers and charging stations, UPS, SMPS, photovoltaic inverters, industrial LED lighting, medical and laboratory equipment.