Compact current measurements
Inverter topologies increasingly rely on accurate current measurements, so current transducers are an area of emphasis at PCIM. In that category are the GO Series transducers from LEM for ac and dc isolated current measurement of 4, 6, 8, 10, 12, 16, 20 or 30 A nominal at frequencies up to 300 kHz. The sensors mount onto a PCB as SO8 or SO16 SMD devices and provide an analoge voltage output. GO transducers incorporate a special primary integrated conductor for gradient measurement. This structure is said to provide excellent immunity against external fields. A proprietary ASIC ensures high-performance accuracy from -40 to +125°C with a response time is as short as 2 µsec. The SO16 version provides two different over-current detection levels on two dedicated pins, one fast, the other slower but more accurate.
Leave a Reply