LEM claims HMSR DA current sensor is a world first
At next week’s PCIM Europe, LEM will introduce what is believed to be the world’s first integrated current sensor with sigma delta bitstream output.
The HMSR DA is the latest member of the HMSR family of robust sensors for measuring DC and AC currents in highly demanding switching power applications in commercial and industrial applications.
The HMSR DA is designed for applications that are prone to noise, distortion and interference and where clean signals are required to avoid “significant problems in case of vibrations, electric noise and electromagnetic noise”.
The sensors are characterised by superior signal share and reduced noise, said LEM, as well as lower cost and a smaller mechanical footprint. HMSR DA will replace more complex and costly alternative systems that would traditionally include a shunt resistor, a digital insulator and a power supply circuit. The integrated sensor is designed for applications where space is at a premium and minimal cost is essential, advised LEM.
Typical applications for the digital output unit include standalone servo drives, robotics, automated guided vehicles (AGVs), CNC machine tools and other applications that demand high resolution output. The HMSR DA sensor offers resolution of 11 to 13 bits and features a 10MHz clock. LEM has announced that it is already working on the next generation of digital integrated circuit sensors which will offer a resolution of 14 to 16 bits and a clock operating above 20MHz.
Analogue versions of LEM’s HMSR range of high insulated, integrated current sensors offer a small and compact current sensor, strong immunity to stray fields, reinforced isolation and a 300kHz bandwidth. The HMSR DA digital integrated circuit sensor will enable engineers to look at new ways of formulating their system design, said LEM. The Sigma Delta bitstream output is easy to use and allows customers to apply filters to adapt the sensor to their specific needs.
