Note that the impressing 9x% efficiency rates that we hear about are peak efficiency rates. There is something to gain in widening the operating ranges of this

Note that the impressing 9x% efficiency rates that we hear about are peak efficiency rates. There is something to gain in widening the operating ranges of this efficiency also. See for instance https://www.researchgate.net/figure/Efficiency-maps-of-several-IPM-motors-in-EVs-HEVs-9-12-13-a-2011-Sonata-b_fig2_309687186 https://www.researchgate.net/figure/Efficiency-maps-of-sever...