Categorized | Industry News, LEM

Posted on 03 August 2016

LEM introduces its first surface mounted SO8 isolated current transducers with integrated current conductor

 

LEM introduces the GHS series: miniature, integrated circuit transducers for AC and DC isolated current measurement up to 100 KHz. These new components offer full isolation despite their small size, integrating the primary conductor for nominal current measurements of 10A, 12A, 16A or 20A with a measurement span of 2.5 times the nominal current, they are also able to support high overload currents up to 200 A peak for short durations (1 ms).

The transducers are mounted directly onto a printed circuit board as an SO8 SMD device reducing manufacturing costs and providing appreciable space saving for space-constrained applications.

GHS models are really simple to use as integrate low resistance primary conductors (minimising power losses) within an ASIC to allow direct current measurement and consistent insulation performance, while still providing high creepage and clearance distances.

All the models provide a ratiometric analogue voltage output with different sensitivity levels from 40 to 80 mV/A according to the model, with a typical response time of 5 us.

GHS transducers are not simple Open Loop Hall effect ASIC-based transducers; the series has been designed with unique primary integrated conductors for gradient measurement to provide an excellent immunity against the external fields found in power electronic applications.

These dedicated designs are combining field proven techniques as spinning, programmable internal temperature compensation (EEPROM) ensuring the high performance accuracy over the full range of temperature with a maximum 1.3 % offset drift and 1.5 % gain drift

The GHS series operates from a single 5 V supply and over a wide operating temperature range from -40 to +125°C making it perfect for use in any harsh industrial applications.

The unique package and performance of the GHS series makes it ideal for applications such as white goods or air conditioning, which benefit from isolated current measurement, high performance and a cost-effective solution. GHS also enables enhanced motor control, reducing energy consumption where other methods, such as a shunt, have traditionally been used.

LEM’s GHS models are designed for use in a wide range of other applications including uninterruptible and switch-mode power supplies, home appliances, static converters for DC motor drives and robotics.

The GHS series conforms to latest industrial standards, as well as being covered by LEM’s five-year warranty.

LEM – At the heart of power electronics
LEM is the market leader in providing innovative and high quality solutions for measuring electrical parameters. Its core products - current and voltage transducers - are used in a broad range of applications in drives & welding, renewable energies & power supplies, traction, high precision, conventional and green cars businesses. LEM’s strategy is to exploit the intrinsic strengths of its core business, and to develop opportunities in existing and new markets with new applications. LEM is a mid-size, global company. It has production plants in Beijing (China), Geneva (Switzerland), Machida (Japan) and Sofia (Bulgaria). With its regional sales offices close to its clients’ locations, the company offers a seamless service around the globe. LEM is listed on the SIX Swiss Exchange since 1986; the company’s ticker symbol is LEHN

 

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