Game-Changing Axial Flux Motor for Affordable EVs


General Motors (GM) is making waves in the electric vehicle (EV) industry with its innovative axial flux motor design. Unlike the traditional radial-flux motors used in most EVs, axial flux motors have the potential to overcome existing limitations and pave the way for smaller, lighter, and more affordable electric vehicles. GM has filed numerous patents related to this cutting-edge motor technology, with a focus on mechanical field-weakening that can increase motor speed at the expense of torque, similar to how a conventional transmission operates. By implementing this technology, GM could revolutionize the EV market by offering compact and budget-friendly electric cars.

Why does it matter?

The key advantage of GM’s axial flux motor design lies in its mechanical field-weakening system, which simplifies the process of adjusting motor performance compared to traditional methods involving complex inverter controls. By utilizing a hydraulic system to modify the air gap between the motor’s components, GM aims to optimize torque and speed according to driving conditions. This approach could lead to smaller and more efficient EVs that deliver ample torque for acceleration while maintaining high speeds for highway driving. With the potential to operate similarly to a continuously variable transmission (CVT), the axial flux motor could offer versatility and improved performance in a wide range of driving scenarios.

How is it going to shape the future?

While the implementation of GM’s axial flux motor technology may still be a few steps away, its impact on the future of EVs is promising. As automakers focus on enhancing battery technologies and refining existing radial-flux motors in the short term, GM’s commitment to advancing axial flux technology signals a shift towards more efficient and cost-effective electric propulsion systems. By introducing smaller, lighter motors with enhanced performance capabilities, GM could set a new standard for affordable EVs that strike a balance between power and efficiency. As the industry continues to evolve, GM’s exploration of axial flux motors suggests a forward-looking approach that could shape the future of electric transportation.