In-wheel motors: BMW’s new engine experiment can boost EVs’ range

BMW is pushing the boundaries of electric vehicle technology with a pioneering in-wheel electric motor developed in partnership with Munich-based tech firm DeepDrive.

The motor is currently in the testing phase and features a unique dual-rotor design. It aims to redefine the efficiency, range, and performance of electric vehicles.

This innovation pioneers a fundamental shift from traditional electric motor design. Unlike conventional motors that rely on the movement of a single rotor, DeepDrive’s technology allows both internal and external rotors to move simultaneously.

Dual-Rotor design: A paradigm shift

“DeepDrive’s innovative concept more or less melds two electric motors into a single unit, creating an extremely compact drive that’s energy-efficient and has a high torque density,” stated the press release from BMW.

This dual-rotor concept enables a more efficient in-wheel drive system, with each wheel powered by a separate, compact motor.

The technology also boasts compatibility with traditional centralized drive systems, offering flexibility for various vehicle configurations.

The implications of this breakthrough are substantial. By integrating these motors directly into the wheels, BMW envisions electric vehicles that are not only more efficient but also offer increased space and adaptability.

Removing the need for bulky, centralized powertrains could revolutionize vehicle design, opening new possibilities for interior layouts and enhancing driving dynamics.

“DeepDrive has developed an exciting vision for the electric drive of the future,” said Karol Virsik, Head of Research Vehicle Concepts and Technologies at the BMW Group.

Production model in sight

DeepDrive’s technology boasts a modular design, allowing it to be seamlessly integrated into various vehicle platforms.

This means that the benefits of this innovation could extend beyond passenger cars, potentially transforming the landscape of electric trucks, buses, and even motorcycles.

Initial simulations have shown the technology surpasses BMW ‘s current in-house capabilities, a notable achievement for the smaller DeepDrive team.

“DeepDrive’s prototype parts largely exceeded our specifications,” added Virsik.

Co-founder and co-CEO of DeepDrive, Felix Pörnbacher, lauded their partnership with BMW.

“It helped us navigate the complex corporate world and meet and exceed the rigorous standards of the automotive industry,” remarked Pörnbacher. “Our goal now is to get it integrated into a production model.”

Real-world testing and future outlook

BMW is currently conducting extensive tests of DeepDrive’s in-wheel motors on prototype vehicles.

These tests will evaluate the technology’s real-world performance, durability, and safety. The data collected will be crucial in refining the design and ensuring it is ready for mass production.

If successful, this innovation could usher in a new era of electric mobility. By offering improved efficiency, performance, and versatility, DeepDrive’s in-wheel motors have the potential to revolutionize the automotive industry and accelerate the transition to a sustainable future.

The next few months will be critical as BMW and DeepDrive work to bring this transformative technology to market, potentially reshaping the landscape of electric vehicles.

A big product lineup

Although DeepDrive’s hub-mounted electric motors are not yet available in production EVs, the company has already envisioned a diverse lineup targeting different market segments.

At the top of the line, DeepDrive’s RM 2400 targets performance-oriented vehicles, including sports cars , with an impressive 2400 Nm of torque and 250kW of peak power, all while weighing only 37 kg.

Notably, all of DeepDrive’s wheel hub motors boast up to 20% greater energy efficiency compared to conventional electric motors, promising reduced ownership costs and a greener footprint.