Summary
- In-wheel motors for electric cars have been proposed to free up space inside the vehicle
- However, in-wheel motors present challenges such as unsprung weight that can affect performance
- Two companies, Donut Lab and Elaphe, showcased their in-wheel motors at CES 2025
- Donut Lab’s in-wheel motor is lighter and less expensive to manufacture, offering impressive performance
- Elaphe’s Sonic.1 in-wheel motor is designed for high performance vehicles and offers faster acceleration and shorter stopping distance compared to conventional e-axles
Article
In-wheel motors for electric cars have generated interest due to the potential to free up space in the vehicle typically occupied by traditional electric motor components. However, the concept faces challenges, particularly related to unsprung weight, which can affect the ride and handling of the vehicle. Despite these challenges, companies like Donut Lab and Elaphe have showcased their in-wheel motors at CES 2025, highlighting advancements in technology and performance.
Donut Lab’s second generation in-wheel motors boast impressive power output and torque while being significantly lighter than traditional rotor and stator designs. These motors offer potential benefits such as increased range, improved vehicle control, and lower manufacturing costs. With applications for automotive, Class 8 tractors, scooters, drones, and motorcycles, Donut Lab’s motors showcase versatility and performance capabilities suitable for a range of vehicles.
Elaphe, another company at CES 2025, introduced its Sonic.1 in-wheel motor optimized for high performance front-wheel applications. This motor offers substantial power output, torque, and speed capabilities, making it suitable for high-performance vehicles where space and weight are critical factors. With advancements like Elaphe Traction Control for faster acceleration and shorter stopping distances, the Sonic.1 demonstrates the potential for in-wheel motors to enhance vehicle performance.
In-wheel electric motors are not a one-size-fits-all solution and may be better suited for specific applications like commercial vehicles rather than sports cars. Ford’s rumored consideration of in-wheel motors for the F-150 Lightning suggests growing interest in adopting this technology in mainstream production vehicles. Factors such as cost, durability, and serviceability will play a crucial role in the widespread adoption of in-wheel motors in the electric vehicle market.
The potential benefits of in-wheel motors, including increased space utilization, improved vehicle control, and lower maintenance costs, make them an attractive option for manufacturers and consumers alike. While challenges like unsprung weight must be addressed, ongoing advancements in technology and performance improvements from companies like Donut Lab and Elaphe indicate a promising future for in-wheel motors in electric vehicles. As the industry continues to evolve, it is likely that in-wheel motors will play a significant role in shaping the future of electric transportation.
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