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Tuesday, 21 September 2021 19:00

GM Reveals All-New EV Motors

The motors that will power GM’s Ultium-based EVs were built as a scalable family, sharing design principles as well as similar tooling and manufacturing strategies. Pictured are the stators of all three motors. The motors that will power GM’s Ultium-based EVs were built as a scalable family, sharing design principles as well as similar tooling and manufacturing strategies. Pictured are the stators of all three motors.

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At the 2021 Mackinac Policy Conference, General Motors President Mark Reuss revealed GM’s group of three all-new motors that will power its Ultium-based EVs.

Designed by GM, the 180-kilowatt front-drive motor, 255-kW rear- and front-drive motor and 62-kW all-wheel drive assist motor are part of Ultium Drive.

 

All three motors were calibrated in-house to ensure the highest level of performance in Ultium-based EVs. The motors were built as a scalable family, sharing design principles as well as similar tooling and manufacturing strategies.  

 

"Twenty years of electric drive system development and more than 100 years of high-volume vehicle engineering are helping GM pivot quickly from conventional vehicles to EVs,” Reuss said at the conference sponsored by the Detroit Regional Chamber. "Our vertical integration in this space, encompassing both hardware and software, helps give us control over our own destiny and a significant competitive advantage."

 

The 180- and 255-kW units are permanent magnet motors designed with the aim of minimizing reliance on heavy rare earth materials while the 62-kW unit is an induction motor. All are expected to offer excellent torque and power density, enabling a wide spectrum of vehicle types, from performance cars to work trucks.

 

As many as three electric motors can be used in one EV---variations of the 2022 GMC HUMMER EV will feature three separate 255-kW motors, yielding a GM-estimated output of 1,000 horsepower.

 

Ultium Drive software development

 

GM engineers have also developed the software for Ultium Drive’s motor controllers, key to serving the propulsion needs of various vehicle types with a minimal set of components. These engineers, based at GM’s Global Technical Center in Warren, MI, Global Propulsion Systems in Pontiac, MI; and Milford Proving Ground, are part of the nearly 11,000 GM product development team members currently working in software development. This number is projected to grow with software serving as a critical pillar of GM’s vision of an all-electric future.

 

The team used computer-assisted and virtual engineering to move quickly, safely and...


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