Current & Voltage Transducers

LEM Automotive specializes in developing and manufacturing current transducers for battery management and motor drive applications in cars, buses and trucks. By controlling the current in energy-intensive applications, LEM participates in the global effort to reduce overall energy consumption.

Typical applications for automotive transducers include:

Standard battery monitoring
Hybrid and EV battery pack current sensing
Fuel cell current control
DC/DC converters and AC/DC inverters
Hybrid and EV motor inverter drive
EPS and X-by-wire applications
Electric compressors for air conditioning

LEM products meet all quality requirements for the automotive industry and comply with RoHS specifications. All our production and development centers are certified with ISO TS 16949. Based on our deep knowledge of applications and current measurement technologies, LEM develops both catalog and customized products which can be perfectly tailored to meet your needs in terms of performance, space requirement and cost.

LEM transducers are CE marked in recognition of their electromagnetic compatibility and their compliance to EMC standards. Their reference standard is EN 50155 for the electrical performance and environmental constraints as well as EN 50124-1 for creepage and clearance distances design versus the required insulation levels.

Energy & Automation

Solutions for energy management, process automation and control

Electrical signals are the power source for all manufacturing processes, machines and systems.  In addition they enable the fast and reliable supervision of equipment and facilities. Integrated transducers from LEM take this a step further and provide your complete process with increased control and reactivity.

These applications are related to different end-user profiles:

Machine and panel builders System integrators / engineering Factory maintenance and safety services Energy service companies and facility management.

LEM integrated transducers combine advanced sensing technologies and signal conditioning of electronic circuits (True RMS, industry standard outputs e.g. 0-5/10 V or 4-20 mA, active energy calculation, threshold detection, specific failure detection, etc.) in addition to integration of communication functions.

Automotive applications

With more than 2,500 current and voltage transducers in our portfolio, LEM offers a comprehensive range of accurate, reliable and galvanically isolated devices to measure current from 0.1 A to 20,000 A and voltage from 10V to 6,400V, across a range of technologies. LEM transducers are CE marked in recognition of their electromagnetic compatibility and compliance to EMC standards. The reference standard is EN50178 to comply with electrical performances and environmental constraints.

Traction and trackside Transducers

Isolated measurement of current, voltage and power

Modes of public transport such as high-speed trains, city transit systems and freight trains provide the ideal solution to meet the increased demand for more mobility whilst helping to fight pollution and traffic congestion. Power electronics is essential to driving and controlling energy in these systems.  New requirements are continuously emerging in the railway industry, such as the demand for energy measurement, track objects monitoring and a need to constantly improve maintenance infrastructures.

Typical applications of LEM products:

Main converter for urban transportation systems
(metros - trams trolleybuses)
Track objects monitoring
Sub-stations
Inverters, converters, rectifiers
Auxiliary power units
Circuit breaker, for transformers, DC link
Control and safety systems
Energy metering
Rolling stock heavy traction, diesel electric
Mining trucks
A complete range of accurate, reliable and galvanically-isolated transducers for the measurement of current from 0.1A to 20,000A and voltage from 10V to 6,400V provides control and protection signals on-boardas well as for trackside applications.

PRODUCT LINES
Industrial Transducers
Traction & Trackside Transducers
Energy & Automation
Automotive Transducers

Industrial Transducers
Isolated measurement of current and voltage

In todays world, efficiency of industrial applications is of increasing importance in order to save energy and money. Industrial applications are controlled by power electronics requiring optimal and accurate regulation of electronic parameters such as current, voltage and power. LEM uses innovative technologies to ensure the high degree of reliability and safety that our customers require.

Typical applications include:

AC variable speed drives
Servo motor drives
Static converter for DC drives
Battery supplied applications
Uninterruptible power supplies (UPS)
Switched-mode power supplies (SMPS)
Power supplies for welding, medical, mobile telecom, etc.
Pumps & fans control/monitoring
Induction cooking
Gas co-generator
Elevators
Forklifts
Air conditioning and ventilation equipment
Various converters (solar, wind generators)
Grid power control

LEM components started in 1972 leverages its more than 35 years experience in the application, design and production of current and voltage transducers.  LEM is a 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 industrial, traction, energy and automotive markets. LEMs strategy is to exploit the intrinsic strengths of its core business, and develop opportunities in new markets with new applications.

LEM is a worldwide company, Head Quarters in Geneva with production facilities in Europe, Asia and America and offices across the globe