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In the electric vehicle realm, good ideas can strike from anywhere. The key shapes often lead to big innovations. While you might associate the word “donut” with delicious baked goods, one Finnish engineering firm is reinventing the meaning. Far from crafting anything you’d see in a bakery, Donut Lab’s electric motor is an innovative, circle-shaped concept that could forever change how we travel.
With electric vehicle technology constantly developing and advancing, manufacturers are actively seeking methods to increase performance while decreasing vehicle weight and enhancing efficiency. Existing electric motors have already proved quite powerful but engineers seek for further enhancements in design, power to weight ratios and energy savings. That is what the researchers at Donut Lab claim they managed with their in-wheel motor solution.
The new motor isn’t just a beefier take on what has come before, it’s the company’s fresh take on how an electric motor ought to be made. With its combination of insane torque, miniature size, and light weight, the Donut Motor could power anything from motorcycles, passenger cars and heavy-duty trucks, to drones, boats and even airplanes.
1. A Revolutionary Electric Motor from Finland
A new circular-shaped electric motor developed by Finnish company Donut Lab is creating quite the buzz within the automotive sector. You might notice the electric motor looks rather round, much like a donut. This shape not only helps to name this particular electric motor, but also is vital in helping boost efficiency of the system as well.
Donut Lab Motor Highlights:
- Innovative donut-shaped design
- Lightweight high-performance motor
- Fits inside vehicle wheel
- Exceptional power output
- Advanced EV engineering
The range-topping version churns out a phenomenal 845 hp and 3,171 lb-ft of torque from its only 88 pounds of weight. This class-leading performance-to-size ratio comes from engineering that produces so much output from so small a unit and even the top spec motor can fit within the circumference of a 21-inch wheel and yet put out the sort of power usually found from much larger motors.
The combination of small size, light weight, and incredible power points to how much the technology for electric motors has continued to advance. Instead of simply increasing the size of components in order to get higher performance, Donut Lab shows us that a smart engineering approach, combined with a truly different approach to the fundamental concept of the vehicle itself, can accomplish even more.
2. How the Donut Motor Works
What separates a Donut Motor from regular electric motors is placement. Normally the motor is placed in the chassis of a car, then the power goes down through driveshafts, transmissions and differentials. Here however, the motor sits directly in the hub of a wheel, meaning that certain mechanical components used up until now in vehicles’ power transfer are removed.
How the Donut Motor Works:
- In-wheel motor design
- Direct power delivery
- Simplified drivetrain layout
- Reduced mechanical losses
- Greater vehicle flexibility
Getting rid of these parts has some serious benefits. Having a simpler drivetrain saves the vehicle some weight, cuts down the complexity of building it, reduces the upkeep and makes the car more efficient. In addition, power being directly fed to the wheels cuts out the energy loss that typically results in a conventional drivetrain.
This minimalist setup provides vehicle designers with significantly more flexibility when planning the design of future electric cars. Additional space gained from eliminating traditional driveline bits can instead be devoted to a bigger battery pack, enhanced passenger space, bigger cargo volume, or even aerodynamics.
3. Incredible Power in a Lightweight Package
One of the biggest achievements in the design of the Donut Motor, however, is its high power-to-weight ratio. When you can get 845 HP out of a 88-pound motor, that’s a real engineering achievement that is difficult to match with electric motors in a normal form factor, making this a good way for EV builders to add some mph.
Power and Efficiency Advantages:
- Exceptional power-to-weight ratio
- Massive instant torque
- Lightweight motor design
- Improved driving efficiency
- High-performance EV technology
The motor is capable of an impressive 3,171 lb-ft of torque. Even electric cars that can deliver torque immediately off the line pale in comparison to what the Donut Motor offers, and that’s to say that it has to deliver torque to the wheels in rapid order. This can enable amazing acceleration from stop with the same feel and smooth power as current electric cars have today.
Vehicle weight is another element that can be positively influenced by reducing it. The lesser vehicle is able to achieve the same effect in terms of mileage when it is powered up, without losing power. That’s what’s been the secret to the world’s fascination with the Donut Motor since it was invented: powerful motor, incredible torque, better range.
4. Solving the Challenge of In-Wheel Motors
“Although the concept of the in-wheel motor has been around for many years it has always been a real problem due to the unsprung mass “says Alastair,” the in-wheel motor adds mass to the wheel itself instead of the vehicle body. This unsprung mass can influence ride comfort and suspension performance. It has historically been a big obstacle to adopting this design in modern vehicles.
Overcoming In-Wheel Motor Challenges:
- Reduced unsprung mass
- Lightweight motor construction
- High power density
- Improved suspension performance
- Future-ready EV technology
The issue of a hefty in-wheel motor, which tends to upset handling through a disproportionately high impact on unsprung mass and the negative influence of increased rotational inertia on acceleration, has been seemingly conquered by Donut Lab with the choice of a very light and super powerful motor. The low weight ensures much less effect on the unsprung mass as the one in previous generation in-wheel motors while the power will compensate the remaining disadvantages.
If this idea works in mass production, it could eliminate one of the biggest roadblocks for making in-wheel motors a common reality for drivers everywhere. The in-wheel motor development will no doubt be one giant leap for smarter electric cars if this idea works.
5. Why the Circular Design Matters
This distinctive donut-design is much more than simply eye candy. The electromagnetic force can be evenly spread through the motor because of its doughnut shape which help save energy lose and make the motor more efficiency, and also this arrangement design help distribute evenly any potential stress.
Benefits of the Circular Design:
- Even power distribution
- Improved energy efficiency
- Better heat management
- Enhanced cooling performance
- Greater long-term reliability
Better thermal performance is another big plus. Electric motors will get warm as they work, and too much heat over time will limit the amount of power you can generate and cut down on lifespan. The circular arrangement of the Donut Motor, the authors say, is more efficient in airflow around the stator and the rotor and therefore helps dissipating heat.
Cooling efficiency is a real advantage of the Donut Motor it helps to support the sustained peak performance that next generation electric vehicle motors will demand. Efficient power transmission combined with heat management increases reliability, as well as performance.
6. Designed for Large-Scale Manufacturing
Apart from performance Donut Lab also concentrated on bringing a mass production reality into the equation. It is all to easy for high technology to prove extremely efficient in testing labs, only for mass producing into products and becomes impossible, or expensive. The donut motor is conceived with an easy, low component design in comparison to several conventional electric drivetrain options.
Manufacturing Advantages:
- Simplified production process
- Fewer mechanical components
- Lower manufacturing complexity
- Easier maintenance requirements
- Scalable EV technology
Simplifying the number of parts makes them easier and less expensive to manufacture, and easier to put together and repair. Since automotive manufacturers are constantly searching for easier, cheaper, and faster production methods, the Donut Motor appears attractive to them on many fronts.
The success of bringing this to market across the spectrum would ultimately be driven by its ability to compete in manufacturing cost, and if it can then consumers will likely see these advancements trickle across a range of vehicle models without dramatically raising prices, thus making it a very realistic option for market wide implementation in mainstream EV vehicles rather than specialist high performance variants.
7. A Flexible Platform for Different Vehicles
“Another thing that’s really exciting about the Donut Motor concept is that it is vehicle-platform independent,” says team leader Ryan. “They didn’t make one wheel motor, they’ve made an entire family of wheel motors with different scalable capabilities for all types of transportation. That lets manufacturers innovate and use it for multiple vehicle types.”
Donut Motor Applications:
- Scalable motor technology
- Multiple vehicle segments
- Motorcycle performance systems
- Compact mobility solutions
- Future transportation applications
While many variations of the motor have already been revealed in various sizes and power levels, a 17-inch one outputs around 201 hp while only weighing 37 lb, intended for powerful bikes. In fact, we’ve already seen the tech applied in practice via Verge Motorcycles’ TS Ultra, demonstrating it is beyond concept phase.
But the motor is scalable from something very small up to something very large. For a very tiny 12-inch 8-pound version for an e-bike or scooter. And an ultra light, extremely powerful four-hp one that only weighs three pounds will could power a drone. The Donut Motor doesn’t only represent the future of the automobile.
8. Expanding Beyond Passenger Vehicles
Of course, the most evident place to find the Donut Motor is in a purely electric-vehicle capacity, but Donut Lab envisions its application in numerous ways far outside the traditional four-door automobile from marine engines and aerospace designs to a variety of commercial vehicles.
Beyond Electric Cars:
- Commercial vehicle applications
- Heavy-duty electric systems
- Marine technology potential
- Aerospace mobility solutions
- Adaptable motor platform
A more robust 21-inch commercial application is being tested for the likes of large semi trucks. The commercial motor will produce an estimated 268 hp and 2,212 lb-ft, enough power for moving the largest of loads, but with the efficiency of electricity.
How one core technology can fit many industries. One of the biggest benefits for Donut Lab could be its ability to leverage one core technology into many industries. Instead of building distinct technologies for various markets, Donut Lab has focused on building one core technology that can be tweaked to different vehicles and applications. That could speed the development and adoption of advanced electric motors in multiple transportation industries.
9. Real-World Testing Through Verge Motorcycles
It is always the greatest test for any developing automotive technology that it can perform adequately outside the confines of the controlled lab setting. Donut Lab is already beginning to break this barrier through its association with Finland-based Verge Motorcycles to bring its in-wheel motor technology to a production-intent bike that customers can ride.
Proving Real-World Performance:
- Production motorcycle integration
- Real-world performance testing
- Customer experience feedback
- Improved technology validation
- Future EV adoption potential
Verge Motorcycles now fits the new Donut Motor to the TS Ultra motorcycle to produce an efficient, functional demonstration of the system. While production motorcycles are already shipping to customers, the new arrangement will give both companies a wealth of real-world data to measure performance, strength, durability, efficiency, and daily use.
It may even set a precedent and help accelerate broader deployment of the technology in subsequent partnerships and vehicle designs. Success with actual vehicle applications also serves to firmly establish Donut Lab not as an experimental technology but a substantial component of electric vehicle transportation of tomorrow.
10. The Future Impact of Donut Motor Technology
The Donut Motor’s arrival is well-timed for an electric vehicle market that has been hungry for designs that can offer more range, greater power, reduced cost, and improved packaging. A lightweight, powerful, and simple motor system has the potential to ease several roadblocks currently hindering EV advancement for manufacturers.
Future EV Possibilities:
- Improved vehicle efficiency
- Lower production complexity
- Reduced material dependency
- Sustainable manufacturing benefits
- Next-generation EV architecture
Furthermore, unlike many conventional electric motor designs, the Donut Motor also eliminates the use of rare-earth materials, helping supply chains and also providing greater scope for sustainable practices during EV manufacturing.
The success of the Donut Motor technology in the long run will be tied to broad industry adoption, more testing and if it can satisfy scaled production needs. Should top-tier automotive companies identify the unique advantages, it may serve as a significant component of future EV platforms and redesign the next generation EVs.
