After years of effort, the factory has utilized its accumulated professional knowledge and design expertise to create a state-of-the-art current sensor that meets the requirements of continuous cost reduction, performance improvement, and miniaturization. We offer aLEM's Surface mount Current SensorDomestic alternative solutions. With this new series, LEM is expanding its miniature current sensors for AC and DC range isolated current measurement. The new HMSR models are easy to use as they include a low resistance primary conductor (which will minimize power loss), a miniature ferrite, and dedicated application specific integrated circuits that allow for DC measurement and consistent insulation performance. This new product category already includes six different rated currents -6A, 8A, 10A, 15A, 20A, and 30A - with a measurement range of SOIC 16 "similar" packaging. The standard model provides analog voltage output with different sensitivity levels, and the 5V power supply version achieves a voltage output of 800 mV under IPN.

Built in two OCD (overcurrent detection) units separate the control application from the safety circuit path. These OCDs are installed on two dedicated pins - one internally set to 2.93 xIPN as a threshold, and the external threshold can be adjusted by the user. However, HMSR sensors should not be considered as simple open-loop Hall effect ASIC sensors. HMSR's unique primary wire allows for timely overload current and high insulation level. All of these are combined with ferrite magnetic circuits to provide good anti-interference ability for external non-uniform fields in power electronics applications. This allows HMSR to use interference in high-level environments. The ferrite used in HMSR is also a key factor in achieving high-frequency bandwidth of 270 kHz (-3dB) and can effectively suppress external magnetic fields. These specialized integrated circuit designs incorporate field validated technologies such as rotation, programmable internal temperature compensation (EEPROM) to improve gain and offset drift. The result is a height of+125 ° C within the temperature range of -40 ° C to -40 ° C, with a typical IPN value of 0.5% (HMSR 20-SMS model). Applications such as power conversion solar inverters or drivers require higher efficiency, which can only be achieved with accurate control circuits. The accuracy of the over temperature pattern has been greatly improved in HMSR compared to the previous generation product. The typical overall error of HMSR 20-SMS in measuring current, as well as good linearity over a wide temperature range (-40 ° C to 125 ° C).

Weikewei is committed to providing you with imported quality, domestically produced in-situ replacement current sensor solutions that meet performance requirements while improving domestic independent controllability. If you need them, please contact an electrical engineer.