I had an interview once at Crystal Sugar and they showed me these huge centrifuges that have regenerative drives on them. As they slow they feed power back to the drives. I did a search and found an article about them.
https://www.foodmanufacturing.com/a...ives-save-energy-food-processing-applications
https://www.foodmanufacturing.com/a...ives-save-energy-food-processing-applications
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