TM4 announces technology advancement and the launch of 3 new SUMO MD electric motors



TM4 announces technology advancement and the launch of 3 new SUMO MD electric motors

June 8, 2016

(Boucherville, QC) – TM4 will introduce three new  TM4 SUMOTM MD powertrain models at the 29th Electric Vehicle Symposium & Exhibition (EVS29) that offer an increase of up to 45% in torque and speed, thanks to a new technological advancement.

Until now, the main rotor technology found in TM4’s electric motors was based on surface mounted permanent magnets. The desire to limit the use of rare-earth magnets has resulted in a technology choice that leverages the reluctance torque of TM4’s external rotor design and decreases by 25% the use of these elements. By substituting some of the magnets with soft magnetic composites (SMCs), variable reluctance adds up to 45% extra torque and operating speed compared with previous technology in same package dimensions.



The new technology was developed in house with the support of Rio Tinto Metal Powders and the National Research Council of Canada (NRC). This partnership has made possible the conception and production of an innovative motor design combining new materials, a new forming process and an optimized fabrication method.

«We improved the torque density and operating speed range while maintaining a competitive price. One of the decisive criterias when selecting a powertrain is how much performance you get for the price, weight and packaging. This new motor design allows us to optimize our direct drive powertrain systems on all of these aspects.   Dana TM4 is constantly seeking ways to improve, through innovation, its products and services to serve its customers better.» says Stéphane Poulin, Vice-President Engineering at TM4 Inc.

The LSM200-2200,2600 and 3000 will be officially launched at the EVS29 expo as part as a cocktail reception at booth 1101 on June 20th at 16h30 EST.



About TM4
A wholly owned subsidiary of Hydro-Québec, TM4 designs and manufactures electric motors, generators, power electronics and control systems suitable for the commercial, automotive, marine, mining, rail, motorsports and recreational vehicle markets. TM4 contributes to the highest possible energy conversion efficiencies thanks to its expertise in permanent magnets motors, thermal management, coil winding, outer-rotor topology, and motor and inverter control algorithms. With offices in Canada and China, TM4 has a worldwide distribution and support network. For more information, visit