HHP Summit 2017


TM4 Upgrades Its Sumo MD Drivelines

June 9, 2016 in Electric Drive, event, New Products, Technology by Rich Piellisch  |  No Comments

Technology Developed with Rio Tinto & National Research Council of Canada

TM4 will unveil three new Sumo MD powertrain options at the EVS29 world electric vehicles meeting in Montreal later this month, promising better performance and less reliance on rare earth materials. The company promises a 45% improvement in torque and speed.

TM4 has improved the torque and reduced the rare earth content of its Sumo brand electric vehicle drive motors.

TM4 has improved the torque and reduced the rare earth content of its Sumo brand electric vehicle drive motors.



“Until now, the main rotor technology found in TM4’s electric motors was based on surface mounted permanent magnets,” states a release. “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.”

The use of SMCs – soft magnetic composites – for some of the magnets contributes to the improved torque and speed.

EVS29Unveil June 20

The enabling technology was developed in-house with the support of Rio Tinto Metal Powders and NRC, the National Research Council of Canada, TM4 says: “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.”

EVS29, organized and hosted by the Washington. D.C.-based Electric Drive Transportation Association, takes place June 19-22 at the Palais des Congrès de Montréal.

TM4’s new Sumo MD LSM200-2200, -2600 and -3000 units will be unveiled on the afternoon of June 20.


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Source: TM4 with Fleets & Fuels follow-up

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