Unique Rotor Design Avoids Current Demagnetization Issues
Colorado’s UQM Technologies reports the award of a U.S. patent covering “a unique rotor design that enables the use of non-rare earth magnets and avoids the demagnetization issues that would occur with these magnets if used in current motor designs.”
The design “provides an alternative technology to reduce exposure to price and supply volatility of rare earth materials,” the company says.
“This new design provides a similar level of performance to UQM’s current design,” states a release. When development is completed, it “will allow UQM the flexibility to choose between these systems depending on projected magnet costs,” the company says.
‘Unique Magnet Geometry’
U.S. patent Number 8,928,198 “covers the unique magnet geometry and the method of manufacturing the motor,” UQM says. It was issued on January 6.
“The patented technology that we’ve developed provides a viable option to existing rare-earth motor technology, limiting exposure for us and our customers to the price and political volatilities of rare-earth magnets,” UQM president and CEO Eric Ridenour said in a release.
“We are now in the prototype stage and the first samples are meeting our objectives, providing us with the validation to move into the next phase of development.”
UQM reported its work on non-rare earth motors more than two years ago (F&F, November 14, 2012).
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Source: UQM Technologies with Fleets & Fuels follow-up