Tier One automotive supplier Mahle has developed an electric motor for EVs that uses no permanent magnets. It is not the first to do so, but it is the first to create a motor that is scalable to fit the needs of many sizes of vehicles, from subcompact cars to medium duty trucks. Mahle says the ability to tune and change the parameters of the rotor’s magnetism instead of being stuck with what a permanent magnet offers has allowed its engineers to achieve efficiencies above 95% right through the range of operating speeds. Only the motors used in Formula E cars offer such efficiency, according to New Atlas.
As a result, there’s practically nothing to wear out, says IEEE Spectrum. “There are no contacts to transmit electricity, no abrasion, no dust formation, no mechanical wear,” Berger, said Wednesday during an online press conference. He adds that the new motor combines the best points of several motor designs by offering good efficiency at both low and high torque.
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