Connect with us

Hi, what are you looking for?

CleanTechnica
World’s fastest interior permanent magnet synchronous motor, from University of New South Wales.

Clean Transport

The World’s Fastest Interior Permanent Magnet Synchronous Motor

The shape of the longest railroad bridge in South Korea has inspired University of New South Wales engineers to design a new high-speed motor. The prototype interior permanent magnet synchronous motor (IPMSM) has achieved speeds of 100,000 RPM, making it the world’s fastest interior permanent magnet synchronous motor. IPMSM motors are used in the traction drives of electric vehicles.

University of New South Wales Associate Professor Rukmi Dutta and Dr. Guoyu Chu.

The new technology has been developed by a team headed by Associate Professor Rukmi Dutta and Dr Guoyu Chu from the University of New South Wales School of Electrical Engineering and Telecommunications.

“An IPMSM type motor has magnets embedded within its rotors to create strong torque for an extended speed range. However, existing IPMSMs suffer from low mechanical strength due to thin iron bridges in their rotors, which limits their maximum speed. But the UNSW team have patented a new rotor topology which significantly improves robustness, while also reducing the amount of rare earth materials per unit power production,” the team states.

“The new design is based on the engineering properties of the Gyopo rail bridge, a double-tied arch structure in South Korea, as well as a compound-curve-based mechanical stress distribution technique.” 

The motor’s impressive power density at around 7kW per kilogram potentially offers improved performance for electric vehicles where weight is extremely important.

“Every EV manufacturer is trying to develop high-speed motors and the reason is that the nature of the law of physics then allows you to shrink the size of that machine. And with a smaller machine, it weighs less and consumes less energy and therefore that gives the vehicle a longer range,” says Dr. Chu.

“If an electric vehicle manufacturer, like Tesla, wanted to use this motor, then I believe it would only take around 6 to 12 months to modify it based on their specifications.”

Dr. Chu kindly answered additional questions for CleanTechnica:

1. What would be the estimated increased range per charge compared to current EV motors?

“We believe if we scale and optimize the motor design for EV applications, it is expected to be 10%–20% lighter and 2%–5% more efficient than motors used in existing EVs. The inverter will also benefit from the high speed and become lighter and smaller. The reduced weight and improved efficiency will contribute to an extended range — the ballpark estimation is around 5%–10% longer.”

2. Which rare earth minerals would be needed in lower quantities other than neodymium?

“The UNSW high-speed motor technology can help to reduce the total volume of permanent magnets required to provide a specific power. So, it can help to reduce the use of overall rare earth and critical minerals in high-energy permanent magnets. Our technology can help to reduce the use of samarium and cobalt if SmCo magnets are used for the motor. Samarium is a rare earth mineral and cobalt is a high-demand critical mineral.”

3. How long would such a motor be expected to last compared to current EV motors?

“Because the UNSW high-speed motor has a significantly strengthened rotor structure, it could achieve a mechanical safety factor 1.5–2 times higher than current EV motors. Consequently, it is expected to be more mechanically robust and should have a longer life span.”

Well, Elon, I hope you give this new motor a try!

 
Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 

Don't want to miss a cleantech story? Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!
 

Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
Advertisement
 
Written By

David Waterworth is a retired teacher who divides his time between looking after his grandchildren and trying to make sure they have a planet to live on. He is long on Tesla [NASDAQ:TSLA].

Comments

You May Also Like

Clean Transport

While EV enthusiasts in Australia and New Zealand might be holding out for a Rivian or a Ford F-150 Lightning, they may have to...

Clean Power

Once upon a time, it was a common assumption in the utility industry and among solar skeptics that solar power couldn’t provide more than...

Batteries

When it comes to electric vehicles and the Inflation Reduction Act of 2022, almost all of the discussion has been around the consumer tax...

Clean Power

Australia has a global reputation of having the highest rate of domestic rooftop solar installation. However, more than 30% of Australians cannot install solar...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.