George, I think Ultium is the GM brand name for its family of EV components, both motors and batteries. It doesn't refer to any particular technology, other than the Ultium family is modular, and components are usable on a variety of vehicle platforms rather than being platform-specific. Sort of how 'Vortec' refers to a family of GM engines, or 'Turbohydramatic' to transmissions.
Of the three Ultium motors GM just announced, two are permanent magnet while the third is induction. Quite different technologies. I think all the Ultium batteries are lithium-ion, but I assume GM would stick with same name if they introduced a non-Li-ion battery.
The GM press release below from 2020 sort of explains what 'Ultium Drive' means.
Curiously, as I was googling, I discovered that Purina has already trademarked Ultium as a brand of horse feed. No comment, Frau Blücher.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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