LEM’s new current sensor for high-power EV traction inverters delivers smallest footprint on the market

Distance and speed of charging are vital in the competitive EV sector and, like all vehicle components, high-power integrated traction inverters – which convert DC into AC and capture energy for the vehicle – need to combine superior performance with being as small and light as possible. Measuring just 29mm x 21mm x 12mm and weighing 27g, LEM’s new HSTDR current sensor is significantly more compact than a traditional C-core sensor, making it much easier to be integrated into space-limited inverter boxes.

The sensor enables traction inverters to operate at maximum efficiency by combining high accuracy with affordability and the ability to operate in demanding environments (the sensor has an operating range of -40°C to +125°C and is robust enough to cope with vibrations up to 10G). Using open loop Hall effect technology and an innovative magnetic core design, the HSTDR offers excellent immunity against external field and cross talk as well as consistent behaviour over frequency with little part-to-part phase shift dispersion, ensuring more accurate torque control (more info).