Leroy Somer Turns 100 Looks to the future

The company that was founded in 1919 and climbed to become the leading provider of quality alternators for OEMs worldwide is committed to continue bringing its French flair for performance & reliability to the market.

The company was recently acquired by the Japanese group Nidec, world leader in electric motors. Nidec manufactures miniaturised motors for computing, robotics and high-power machines for industrial installations. Since its takeover, Nidec has made several investments, boosting the industrial growth of Leroy-Somer even further. In particular, a joint venture was set up with the car manufacturing group PSA (Vauxhall - Peugeot - Citroën) for the development of highperformance electric motors.

For alternator production, this new dynamic has resulted in strong sales growth, supported by the coherence of the Leroy-Somer product offering. With the introduction of the TAL range, Leroy-Somer responds to changes in the market with a powerful product, equipped with the latest technologies and inheriting the legendary reliability of the LSA range. Investments in research and development have also continued, with the introduction of new digital regulators for medium and high voltage alternators (D700), and low voltage (D350, D550). as evidenced by the recent downsizing of the 180 and 200 kVA powers on the LSA 44.3 and TAL 44 machines. Leroy-Somer was founded in Angoulême, France in 1919 by Marcellin Leroy, a self-taught young entrepreneur who started with an electric motor repair business before launching his own production. Very quickly the company developed and started a process of vertical integration, launching its own foundry in 1928. In 1947 the production of alternators began. In the 1980s Leroy-Somer invented AREP, the first auxiliary winding excitation system, and has since maintained

a certain leadership on this technology. In the 1990s, the company expanded its footprint worldwide; bought by Emerson, it opened factories in China, India and the United States to serve OEMs on all continents with the same quality of production. The world’s No. 1 Industrial Alternator manufacturer and serves 8 of the world's 10 largest genset builders. The road ahead is exciting: digitisation, hybrid systems, components integration… Today more than ever, the world needs reliable, smart power systems that can handle the complexity of modern installations. As we reach the 100 years of Leroy-Somer, we are pleased to celebrate our anniversary with AMPS. 

The road ahead is exciting:

Digitisation, hybrid systems, components integration… Today more than ever, the world needs reliable, smart power systems that can handle the complexity of modern installations. As we reach the 100 years of Leroy-Somer, we are pleased to celebrate our anniversary with AMPS. More than ever, we support the dynamic UK market, which continues to play a pivotal role in the commercialisation and development of innovative power generation solutions.